Bumping version to 1.1.1 (#5377)

* Bumping version to 1.1.1

* Fix whitespace

* Add Changelog

Co-authored-by: Github Build Bot <buildbot@fishtownanalytics.com>
Co-authored-by: Leah Antkiewicz <leah.antkiewicz@fishtownanalytics.com>

.bumpversion.cfg

@@ -1,26 +1,41 @@
 [bumpversion]
-current_version = 0.12.0
+current_version = 1.1.1
 parse = (?P<major>\d+)
 	\.(?P<minor>\d+)
 	\.(?P<patch>\d+)
-	((?P<prerelease>[a-z]+)(?P<num>\d+))?
-serialize = 
-	{major}.{minor}.{patch}{prerelease}{num}
+	((?P<prekind>a|b|rc)
+	(?P<pre>\d+)  # pre-release version num
+	)?
+serialize =
+	{major}.{minor}.{patch}{prekind}{pre}
 	{major}.{minor}.{patch}
 commit = False
 tag = False
 
-[bumpversion:part:prerelease]
+[bumpversion:part:prekind]
 first_value = a
-values = 
+optional_value = final
+values =
 	a
 	b
 	rc
+	final
 
-[bumpversion:part:num]
+[bumpversion:part:pre]
 first_value = 1
 
-[bumpversion:file:setup.py]
+[bumpversion:file:core/setup.py]
 
-[bumpversion:file:dbt/version.py]
+[bumpversion:file:core/dbt/version.py]
 
+[bumpversion:file:core/scripts/create_adapter_plugins.py]
+
+[bumpversion:file:plugins/postgres/setup.py]
+
+[bumpversion:file:plugins/postgres/dbt/adapters/postgres/__version__.py]
+
+[bumpversion:file:docker/Dockerfile]
+
+[bumpversion:file:tests/adapter/setup.py]
+
+[bumpversion:file:tests/adapter/dbt/tests/adapter/__version__.py]

.changes/0.0.0.md

@@ -0,0 +1,16 @@
+## Previous Releases
+
+For information on prior major and minor releases, see their changelogs:
+
+* [1.0](https://github.com/dbt-labs/dbt-core/blob/1.0.latest/CHANGELOG.md)
+* [0.21](https://github.com/dbt-labs/dbt-core/blob/0.21.latest/CHANGELOG.md)
+* [0.20](https://github.com/dbt-labs/dbt-core/blob/0.20.latest/CHANGELOG.md)
+* [0.19](https://github.com/dbt-labs/dbt-core/blob/0.19.latest/CHANGELOG.md)
+* [0.18](https://github.com/dbt-labs/dbt-core/blob/0.18.latest/CHANGELOG.md)
+* [0.17](https://github.com/dbt-labs/dbt-core/blob/0.17.latest/CHANGELOG.md)
+* [0.16](https://github.com/dbt-labs/dbt-core/blob/0.16.latest/CHANGELOG.md)
+* [0.15](https://github.com/dbt-labs/dbt-core/blob/0.15.latest/CHANGELOG.md)
+* [0.14](https://github.com/dbt-labs/dbt-core/blob/0.14.latest/CHANGELOG.md)
+* [0.13](https://github.com/dbt-labs/dbt-core/blob/0.13.latest/CHANGELOG.md)
+* [0.12](https://github.com/dbt-labs/dbt-core/blob/0.12.latest/CHANGELOG.md)
+* [0.11 and earlier](https://github.com/dbt-labs/dbt-core/blob/0.11.latest/CHANGELOG.md)

.changes/1.1.0.md

@@ -0,0 +1,96 @@
+## dbt-core 1.1.0 - April 28, 2022
+### Breaking Changes
+- **Relevant to maintainers of adapter plugins _only_:** The abstractmethods `get_response` and `execute` now only return a `connection.AdapterReponse` in type hints. (Previously, they could return a string.) We encourage you to update your methods to return an object of class `AdapterResponse`, or implement a subclass specific to your adapter
+ ([#4499](https://github.com/dbt-labs/dbt-core/issues/4499), [#4869](https://github.com/dbt-labs/dbt-core/pull/4869))
+- For adapter plugin maintainers only: Internal adapter methods `set_relations_cache` + `_relations_cache_for_schemas` each take an additional argument, for use with experimental `CACHE_SELECTED_ONLY` config ([#4688](https://github.com/dbt-labs/dbt-core/issues/4688), [#4860](https://github.com/dbt-labs/dbt-core/pull/4860))
+### Features
+- Change behaviour of `non_null` test so that it only `select`s all columns if `--store-failures` is enabled. ([#4769](https://github.com/dbt-labs/dbt-core/issues/4769), [#4777](https://github.com/dbt-labs/dbt-core/pull/4777))
+- Testing framework for dbt adapter testing ([#4730](https://github.com/dbt-labs/dbt-core/issues/4730), [#4846](https://github.com/dbt-labs/dbt-core/pull/4846))
+- Allow unique key to take a list implementation for postgres/redshift ([#4738](https://github.com/dbt-labs/dbt-core/issues/4738), [#4858](https://github.com/dbt-labs/dbt-core/pull/4858))
+- Add `--cache_selected_only` flag to cache schema object of selected models only. ([#4688](https://github.com/dbt-labs/dbt-core/issues/4688), [#4860](https://github.com/dbt-labs/dbt-core/pull/4860))
+- Support custom names for generic tests ([#3348](https://github.com/dbt-labs/dbt-core/issues/3348), [#4898](https://github.com/dbt-labs/dbt-core/pull/4898))
+- Added Support for Semantic Versioning ([#4453](https://github.com/dbt-labs/dbt-core/issues/4453), [#4644](https://github.com/dbt-labs/dbt-core/pull/4644))
+- New Dockerfile to support specific db adapters and platforms. See docker/README.md for details ([#4495](https://github.com/dbt-labs/dbt-core/issues/4495), [#4487](https://github.com/dbt-labs/dbt-core/pull/4487))
+- Allow unique_key to take a list ([#2479](https://github.com/dbt-labs/dbt-core/issues/2479), [#4618](https://github.com/dbt-labs/dbt-core/pull/4618))
+- Add `--quiet` global flag and `print` Jinja function ([#3451](https://github.com/dbt-labs/dbt-core/issues/3451), [#4701](https://github.com/dbt-labs/dbt-core/pull/4701))
+- Add space before justification periods ([#4737](https://github.com/dbt-labs/dbt-core/issues/4737), [#4744](https://github.com/dbt-labs/dbt-core/pull/4744))
+- Enable dbt jobs to run downstream models based on fresher sources. Compare the source freshness results between previous and current state. If any source is fresher and/or new in current vs. previous state, dbt will run and test the downstream models in scope. Example command: `dbt build --select source_status:fresher+`  ([#4050](https://github.com/dbt-labs/dbt-core/issues/4050), [#4256](https://github.com/dbt-labs/dbt-core/pull/4256))
+- converting unique key as list tests to new pytest format ([#4882](https://github.com/dbt-labs/dbt-core/issues/4882), [#4958](https://github.com/dbt-labs/dbt-core/pull/4958))
+- Add a variable called selected_resources in the Jinja context containing a list of all the resources matching the nodes for  the --select, --exclude and/or --selector parameters. ([#3471](https://github.com/dbt-labs/dbt-core/issues/3471), [#5001](https://github.com/dbt-labs/dbt-core/pull/5001))
+- Support the DO_NOT_TRACK environment variable from the consoledonottrack.com initiative ([#3540](https://github.com/dbt-labs/dbt-core/issues/3540), [#5000](https://github.com/dbt-labs/dbt-core/pull/5000))
+- Add `--no-print` global flag ([#4710](https://github.com/dbt-labs/dbt-core/issues/4710), [#4854](https://github.com/dbt-labs/dbt-core/pull/4854))
+- add enabled as a source config ([#3662](https://github.com/dbt-labs/dbt-core/issues/3662), [#5008](https://github.com/dbt-labs/dbt-core/pull/5008))
+### Fixes
+- Fix bug causing empty node level meta, snapshot config errors ([#4459](https://github.com/dbt-labs/dbt-core/issues/4459), [#4726](https://github.com/dbt-labs/dbt-core/pull/4726))
+- Inconsistent timestamps between inserted/updated and deleted rows in snapshots ([#4347](https://github.com/dbt-labs/dbt-core/issues/4347), [#4513](https://github.com/dbt-labs/dbt-core/pull/4513))
+- Catch all Requests Exceptions on deps install to attempt retries.  Also log the exceptions hit. ([#4849](https://github.com/dbt-labs/dbt-core/issues/4849), [#4865](https://github.com/dbt-labs/dbt-core/pull/4865))
+- Use cli_vars instead of context to create package and selector renderers ([#4876](https://github.com/dbt-labs/dbt-core/issues/4876), [#4878](https://github.com/dbt-labs/dbt-core/pull/4878))
+- depend on new dbt-extractor version with fixed github links ([#4891](https://github.com/dbt-labs/dbt-core/issues/4891), [#4890](https://github.com/dbt-labs/dbt-core/pull/4890))
+- Update bumpervsion config to stop looking for missing setup.py ([#-1](https://github.com/dbt-labs/dbt-core/issues/-1), [#4896](https://github.com/dbt-labs/dbt-core/pull/4896))
+- Corrected permissions settings for docker release workflow ([#4902](https://github.com/dbt-labs/dbt-core/issues/4902), [#4903](https://github.com/dbt-labs/dbt-core/pull/4903))
+- User wasn't asked for permission to overwite a profile entry when running init inside an existing project ([#4375](https://github.com/dbt-labs/dbt-core/issues/4375), [#4447](https://github.com/dbt-labs/dbt-core/pull/4447))
+- Add project name validation to `dbt init` ([#4490](https://github.com/dbt-labs/dbt-core/issues/4490), [#4536](https://github.com/dbt-labs/dbt-core/pull/4536))
+- Allow override of string and numeric types for adapters. ([#4603](https://github.com/dbt-labs/dbt-core/issues/4603), [#4604](https://github.com/dbt-labs/dbt-core/pull/4604))
+- A change in secret environment variables won't trigger a full reparse ([#4650](https://github.com/dbt-labs/dbt-core/issues/4650), [#4665](https://github.com/dbt-labs/dbt-core/pull/4665))
+- Fix misspellings and typos in docstrings ([#4904](https://github.com/dbt-labs/dbt-core/issues/4904), [#4545](https://github.com/dbt-labs/dbt-core/pull/4545))
+- Catch more cases to retry package retrieval for deps pointing to the hub.  Also start to cache the package requests. ([#4849](https://github.com/dbt-labs/dbt-core/issues/4849), [#4982](https://github.com/dbt-labs/dbt-core/pull/4982))
+- Make the warning message for a full event deque more descriptive ([#4962](https://github.com/dbt-labs/dbt-core/issues/4962), [#5011](https://github.com/dbt-labs/dbt-core/pull/5011))
+- Fix hard delete snapshot test ([#4916](https://github.com/dbt-labs/dbt-core/issues/4916), [#5020](https://github.com/dbt-labs/dbt-core/pull/5020))
+- Restore ability to utilize `updated_at` for check_cols snapshots ([#5076](https://github.com/dbt-labs/dbt-core/issues/5076), [#5077](https://github.com/dbt-labs/dbt-core/pull/5077))
+- Use yaml renderer (with target context) for rendering selectors ([#5131](https://github.com/dbt-labs/dbt-core/issues/5131), [#5136](https://github.com/dbt-labs/dbt-core/pull/5136))
+- Fix retry logic to return values after initial try ([#5023](https://github.com/dbt-labs/dbt-core/issues/5023), [#5137](https://github.com/dbt-labs/dbt-core/pull/5137))
+- Scrub secret env vars from CommandError in exception stacktrace ([#5151](https://github.com/dbt-labs/dbt-core/issues/5151), [#5152](https://github.com/dbt-labs/dbt-core/pull/5152))
+### Docs
+- Resolve errors related to operations preventing DAG from generating in the docs.  Also patch a spark issue to allow search to filter accurately past the missing columns. ([#4578](https://github.com/dbt-labs/dbt-core/issues/4578), [#4763](https://github.com/dbt-labs/dbt-core/pull/4763))
+- Fixed capitalization in UI for exposures of `type: ml` ([#4984](https://github.com/dbt-labs/dbt-core/issues/4984), [#4995](https://github.com/dbt-labs/dbt-core/pull/4995))
+- List packages and tags in alphabetical order ([#4984](https://github.com/dbt-labs/dbt-core/issues/4984), [#4995](https://github.com/dbt-labs/dbt-core/pull/4995))
+- Bump jekyll from 3.8.7 to 3.9.0 ([#4984](https://github.com/dbt-labs/dbt-core/issues/4984), [#4995](https://github.com/dbt-labs/dbt-core/pull/4995))
+- Updated docker README to reflect necessity of using BuildKit ([#4990](https://github.com/dbt-labs/dbt-core/issues/4990), [#5018](https://github.com/dbt-labs/dbt-core/pull/5018))
+### Under the Hood
+- Automate changelog generation with changie ([#4652](https://github.com/dbt-labs/dbt-core/issues/4652), [#4743](https://github.com/dbt-labs/dbt-core/pull/4743))
+- add performance regression testing runner without orchestration ([#4021](https://github.com/dbt-labs/dbt-core/issues/4021), [#4602](https://github.com/dbt-labs/dbt-core/pull/4602))
+- Fix broken links for changelog generation and tweak GHA to only post a comment once when changelog entry is missing. ([#4848](https://github.com/dbt-labs/dbt-core/issues/4848), [#4857](https://github.com/dbt-labs/dbt-core/pull/4857))
+- Add support for Python 3.10 ([#4562](https://github.com/dbt-labs/dbt-core/issues/4562), [#4866](https://github.com/dbt-labs/dbt-core/pull/4866))
+- Enable more dialects to snapshot sources with added columns, even those that don't support boolean datatypes ([#4488](https://github.com/dbt-labs/dbt-core/issues/4488), [#4871](https://github.com/dbt-labs/dbt-core/pull/4871))
+- Add Graph Compilation and Adapter Cache tracking ([#4625](https://github.com/dbt-labs/dbt-core/issues/4625), [#4912](https://github.com/dbt-labs/dbt-core/pull/4912))
+- Testing cleanup ([#3648](https://github.com/dbt-labs/dbt-core/issues/3648), [#4509](https://github.com/dbt-labs/dbt-core/pull/4509))
+- Clean up test deprecation warnings ([#3988](https://github.com/dbt-labs/dbt-core/issues/3988), [#4556](https://github.com/dbt-labs/dbt-core/pull/4556))
+- Use mashumaro for serialization in event logging ([#4504](https://github.com/dbt-labs/dbt-core/issues/4504), [#4505](https://github.com/dbt-labs/dbt-core/pull/4505))
+- Drop support for Python 3.7.0 + 3.7.1 ([#4584](https://github.com/dbt-labs/dbt-core/issues/4584), [#4585](https://github.com/dbt-labs/dbt-core/pull/4585))
+- Drop support for Python <3.7.2 ([#4584](https://github.com/dbt-labs/dbt-core/issues/4584), [#4643](https://github.com/dbt-labs/dbt-core/pull/4643))
+- Re-format codebase (except tests) using pre-commit hooks ([#3195](https://github.com/dbt-labs/dbt-core/issues/3195), [#4697](https://github.com/dbt-labs/dbt-core/pull/4697))
+- Add deps module README ([#4904](https://github.com/dbt-labs/dbt-core/issues/4904), [#4686](https://github.com/dbt-labs/dbt-core/pull/4686))
+- Initial conversion of tests to pytest ([#4690](https://github.com/dbt-labs/dbt-core/issues/4690), [#4691](https://github.com/dbt-labs/dbt-core/pull/4691))
+- Fix errors in Windows for tests/functions ([#4782](https://github.com/dbt-labs/dbt-core/issues/4782), [#4767](https://github.com/dbt-labs/dbt-core/pull/4767))
+- Create a dbt.tests.adapter release when releasing dbt and postgres ([#4812](https://github.com/dbt-labs/dbt-core/issues/4812), [#4948](https://github.com/dbt-labs/dbt-core/pull/4948))
+- update docker image to use python 3.10.3 ([#4904](https://github.com/dbt-labs/dbt-core/issues/4904), [#4963](https://github.com/dbt-labs/dbt-core/pull/4963))
+- updates black to 22.3.0 which fixes dependency incompatibility when running with precommit. ([#4904](https://github.com/dbt-labs/dbt-core/issues/4904), [#4972](https://github.com/dbt-labs/dbt-core/pull/4972))
+- Adds config util for ad-hoc creation of project objs or dicts ([#4808](https://github.com/dbt-labs/dbt-core/issues/4808), [#4981](https://github.com/dbt-labs/dbt-core/pull/4981))
+- Remove TableComparison and convert existing calls to use dbt.tests.util ([#4778](https://github.com/dbt-labs/dbt-core/issues/4778), [#4986](https://github.com/dbt-labs/dbt-core/pull/4986))
+- Remove unneeded create_schema in snapshot materialization ([#4742](https://github.com/dbt-labs/dbt-core/issues/4742), [#4993](https://github.com/dbt-labs/dbt-core/pull/4993))
+- Added .git-blame-ignore-revs file to mask re-formmating commits from git blame ([#5004](https://github.com/dbt-labs/dbt-core/issues/5004), [#5019](https://github.com/dbt-labs/dbt-core/pull/5019))
+- Convert version tests to pytest ([#5024](https://github.com/dbt-labs/dbt-core/issues/5024), [#5026](https://github.com/dbt-labs/dbt-core/pull/5026))
+- Updating tests and docs to show that we now support Python 3.10 ([#4974](https://github.com/dbt-labs/dbt-core/issues/4974), [#5025](https://github.com/dbt-labs/dbt-core/pull/5025))
+- Update --version output and logic ([#4724](https://github.com/dbt-labs/dbt-core/issues/4724), [#5029](https://github.com/dbt-labs/dbt-core/pull/5029))
+-  ([#5033](https://github.com/dbt-labs/dbt-core/issues/5033), [#5032](https://github.com/dbt-labs/dbt-core/pull/5032))
+
+### Contributors
+- [@NiallRees](https://github.com/NiallRees) ([#4447](https://github.com/dbt-labs/dbt-core/pull/4447))
+- [@agoblet](https://github.com/agoblet) ([#5000](https://github.com/dbt-labs/dbt-core/pull/5000))
+- [@alswang18](https://github.com/alswang18) ([#4644](https://github.com/dbt-labs/dbt-core/pull/4644))
+- [@amirkdv](https://github.com/amirkdv) ([#4536](https://github.com/dbt-labs/dbt-core/pull/4536))
+- [@anaisvaillant](https://github.com/anaisvaillant) ([#4256](https://github.com/dbt-labs/dbt-core/pull/4256))
+- [@b-per](https://github.com/b-per) ([#5001](https://github.com/dbt-labs/dbt-core/pull/5001))
+- [@dbeatty10](https://github.com/dbeatty10) ([#5077](https://github.com/dbt-labs/dbt-core/pull/5077))
+- [@ehmartens](https://github.com/ehmartens) ([#4701](https://github.com/dbt-labs/dbt-core/pull/4701))
+- [@joellabes](https://github.com/joellabes) ([#4744](https://github.com/dbt-labs/dbt-core/pull/4744))
+- [@jonstacks](https://github.com/jonstacks) ([#4995](https://github.com/dbt-labs/dbt-core/pull/4995))
+- [@kadero](https://github.com/kadero) ([#4513](https://github.com/dbt-labs/dbt-core/pull/4513))
+- [@karunpoudel](https://github.com/karunpoudel) ([#4860](https://github.com/dbt-labs/dbt-core/pull/4860), [#4860](https://github.com/dbt-labs/dbt-core/pull/4860))
+- [@kazanzhy](https://github.com/kazanzhy) ([#4545](https://github.com/dbt-labs/dbt-core/pull/4545))
+- [@matt-winkler](https://github.com/matt-winkler) ([#4256](https://github.com/dbt-labs/dbt-core/pull/4256))
+- [@mdesmet](https://github.com/mdesmet) ([#4604](https://github.com/dbt-labs/dbt-core/pull/4604))
+- [@pgoslatara](https://github.com/pgoslatara) ([#4995](https://github.com/dbt-labs/dbt-core/pull/4995))
+- [@poloaraujo](https://github.com/poloaraujo) ([#4854](https://github.com/dbt-labs/dbt-core/pull/4854))
+- [@sungchun12](https://github.com/sungchun12) ([#4256](https://github.com/dbt-labs/dbt-core/pull/4256))
+- [@willbowditch](https://github.com/willbowditch) ([#4777](https://github.com/dbt-labs/dbt-core/pull/4777))

.changes/1.1.1.md

@@ -0,0 +1,14 @@
+## dbt-core 1.1.1 - June 15, 2022
+### Fixes
+- Relax minimum supported version of MarkupSafe ([#4745](https://github.com/dbt-labs/dbt-core/issues/4745), [#5039](https://github.com/dbt-labs/dbt-core/pull/5039))
+- When parsing 'all_sources' should be a list of unique dirs ([#5120](https://github.com/dbt-labs/dbt-core/issues/5120), [#5176](https://github.com/dbt-labs/dbt-core/pull/5176))
+- Remove docs file from manifest when removing doc node ([#4146](https://github.com/dbt-labs/dbt-core/issues/4146), [#5270](https://github.com/dbt-labs/dbt-core/pull/5270))
+- Fixing Windows color regression ([#5191](https://github.com/dbt-labs/dbt-core/issues/5191), [#5327](https://github.com/dbt-labs/dbt-core/pull/5327))
+### Under the Hood
+- Update context readme + clean up context code" ([#4796](https://github.com/dbt-labs/dbt-core/issues/4796), [#5334](https://github.com/dbt-labs/dbt-core/pull/5334))
+### Dependencies
+- Bumping hologram version ([#5219](https://github.com/dbt-labs/dbt-core/issues/5219), [#5218](https://github.com/dbt-labs/dbt-core/pull/5218))
+- Pin networkx to <2.8.4 for v1.1 patches ([#5286](https://github.com/dbt-labs/dbt-core/issues/5286), [#5334](https://github.com/dbt-labs/dbt-core/pull/5334))
+
+### Contributors
+- [@adamantike](https://github.com/adamantike) ([#5039](https://github.com/dbt-labs/dbt-core/pull/5039))

.changes/README.md

@@ -0,0 +1,53 @@
+# CHANGELOG Automation
+
+We use [changie](https://changie.dev/) to automate `CHANGELOG` generation.  For installation and format/command specifics, see the documentation.
+
+### Quick Tour
+
+- All new change entries get generated under `/.changes/unreleased` as a yaml file
+- `header.tpl.md` contains the contents of the entire CHANGELOG file
+- `0.0.0.md` contains the contents of the footer for the entire CHANGELOG file.  changie looks to be in the process of supporting a footer file the same as it supports a header file.  Switch to that when available.  For now, the 0.0.0 in the file name forces it to the bottom of the changelog no matter what version we are releasing.
+- `.changie.yaml` contains the fields in a change, the format of a single change, as well as the format of the Contributors section for each version.
+
+### Workflow
+
+#### Daily workflow
+Almost every code change we make associated with an issue will require a `CHANGELOG` entry.  After you have created the PR in GitHub, run `changie new` and follow the command prompts to generate a yaml file with your change details.  This only needs to be done once per PR.
+
+The `changie new` command will ensure correct file format and file name.  There is a one to one mapping of issues to changes.  Multiple issues cannot be lumped into a single entry. If you make a mistake, the yaml file may be directly modified and saved as long as the format is preserved.
+
+Note: If your PR has been cleared by the Core Team as not needing a changelog entry, the `Skip Changelog` label may be put on the PR to bypass the GitHub action that blacks PRs from being merged when they are missing a `CHANGELOG` entry.
+
+#### Prerelease Workflow
+These commands batch up changes in `/.changes/unreleased` to be included in this prerelease and move those files to a directory named for the release version.  The `--move-dir` will be created if it does not exist and is created in `/.changes`.
+
+```
+changie batch <version>  --move-dir '<version>' --prerelease 'rc1'
+changie merge
+```
+
+Example
+```
+changie batch 1.0.5  --move-dir '1.0.5' --prerelease 'rc1'
+changie merge
+```
+
+#### Final Release Workflow
+These commands batch up changes in `/.changes/unreleased` as well as `/.changes/<version>` to be included in this final release and delete all prereleases.  This rolls all prereleases up into a single final release.  All `yaml` files in `/unreleased` and `<version>` will be deleted at this point.
+
+```
+changie batch <version>  --include '<version>' --remove-prereleases
+changie merge
+```
+
+Example
+```
+changie batch 1.0.5  --include '1.0.5' --remove-prereleases
+changie merge
+```
+
+### A Note on Manual Edits & Gotchas
+- Changie generates markdown files in the `.changes` directory that are parsed together with the `changie merge` command.  Every time `changie merge` is run, it regenerates the entire file.  For this reason, any changes made directly to `CHANGELOG.md` will be overwritten on the next run of `changie merge`.
+- If changes need to be made to the `CHANGELOG.md`, make the changes to the relevant `<version>.md` file located in the `/.changes` directory.  You will then run `changie merge` to regenerate the `CHANGELOG.MD`.
+- Do not run `changie batch` again on released versions.  Our final release workflow deletes all of the yaml files associated with individual changes.  If for some reason modifications to the `CHANGELOG.md` are required after we've generated the final release `CHANGELOG.md`, the modifications need to be done manually to the `<version>.md` file in the `/.changes` directory.
+- changie can modify, create and delete files depending on the command you run.  This is expected.  Be sure to commit everything that has been modified and deleted.

.changes/header.tpl.md

@@ -0,0 +1,6 @@
+# dbt Core Changelog
+
+- This file provides a full account of all changes to `dbt-core` and `dbt-postgres`
+- Changes are listed under the (pre)release in which they first appear. Subsequent releases include changes from previous releases.
+- "Breaking changes" listed under a version may require action from end users or external maintainers when upgrading to that version.
+- Do not edit this file directly. This file is auto-generated using [changie](https://github.com/miniscruff/changie). For details on how to document a change, see [the contributing guide](https://github.com/dbt-labs/dbt-core/blob/main/CONTRIBUTING.md#adding-changelog-entry)

.changie.yaml

@@ -0,0 +1,60 @@
+changesDir: .changes
+unreleasedDir: unreleased
+headerPath: header.tpl.md
+versionHeaderPath: ""
+changelogPath: CHANGELOG.md
+versionExt: md
+versionFormat: '## dbt-core {{.Version}} - {{.Time.Format "January 02, 2006"}}'
+kindFormat: '### {{.Kind}}'
+changeFormat: '- {{.Body}} ([#{{.Custom.Issue}}](https://github.com/dbt-labs/dbt-core/issues/{{.Custom.Issue}}), [#{{.Custom.PR}}](https://github.com/dbt-labs/dbt-core/pull/{{.Custom.PR}}))'
+kinds:
+- label: Breaking Changes
+- label: Features
+- label: Fixes
+- label: Docs
+- label: Under the Hood
+- label: Dependencies
+custom:
+- key: Author
+  label: GitHub Username(s) (separated by a single space if multiple)
+  type: string
+  minLength: 3
+- key: Issue
+  label: GitHub Issue Number
+  type: int
+  minLength: 4
+- key: PR
+  label: GitHub Pull Request Number
+  type: int
+  minLength: 4
+footerFormat: |
+  {{- $contributorDict := dict }}
+  {{- /* any names added to this list should be all lowercase for later matching purposes */}}
+  {{- $core_team := list "emmyoop" "nathaniel-may" "gshank" "leahwicz" "chenyulinx" "stu-k" "iknox-fa" "versusfacit" "mcknight-42" "jtcohen6" "dependabot" }}
+  {{- range $change := .Changes }}
+    {{- $authorList := splitList " " $change.Custom.Author }}
+    {{- /* loop through all authors for a PR */}}
+    {{- range $author := $authorList }}
+      {{- $authorLower := lower $author }}
+      {{- /* we only want to include non-core team contributors */}}
+      {{- if not (has $authorLower $core_team)}}
+        {{- $pr := $change.Custom.PR }}
+        {{- /* check if this contributor has other PRs associated with them already */}}
+        {{- if hasKey $contributorDict $author }}
+          {{- $prList := get $contributorDict $author }}
+          {{- $prList = append $prList $pr  }}
+          {{- $contributorDict := set $contributorDict $author $prList }}
+        {{- else }}
+          {{- $prList := list $change.Custom.PR }}
+          {{- $contributorDict := set $contributorDict $author $prList }}
+        {{- end }}
+      {{- end}}
+    {{- end}}
+  {{- end }}
+  {{- /* no indentation here for formatting so the final markdown doesn't have unneeded indentations */}}
+  {{- if $contributorDict}}
+  ### Contributors
+  {{- range $k,$v := $contributorDict }}
+  - [@{{$k}}](https://github.com/{{$k}}) ({{ range $index, $element := $v }}{{if $index}}, {{end}}[#{{$element}}](https://github.com/dbt-labs/dbt-core/pull/{{$element}}){{end}})
+  {{- end }}
+  {{- end }}

.circleci/config.yml

@@ -1,141 +0,0 @@
-version: 2
-jobs:
-  unit:
-    docker: &py36
-      - image: python:3.6
-      - image: postgres
-        environment: &pgenv
-          POSTGRES_USER: "root"
-          POSTGRES_PASSWORD: "password"
-          POSTGRES_DB: "dbt"
-    steps:
-      - checkout
-      - run: apt-get update && apt-get install -y python-dev python3-dev postgresql
-      - run: echo 127.0.0.1 database | tee -a /etc/hosts
-      - run: pip install virtualenvwrapper tox
-      - run: &setupdb
-          name: Setup postgres
-          command: bash test/setup_db.sh
-          environment:
-            PGHOST: 127.0.0.1
-            PGUSER: root
-            PGPASSWORD: password
-            PGDATABASE: postgres
-      - run: tox -e pep8,unit-py27,unit-py36
-  integration-postgres-py36:
-    docker: *py36
-    steps:
-      - checkout
-      - run: apt-get update && apt-get install -y python3-dev postgresql
-      - run: echo 127.0.0.1 database | tee -a /etc/hosts
-      - run: pip install virtualenvwrapper tox
-      - run: *setupdb
-      - run:
-          name: Run tests
-          command: tox -e integration-postgres-py36
-  integration-snowflake-py36:
-    docker: *py36
-    steps:
-      - checkout
-      - run: apt-get update && apt-get install -y python3-dev postgresql
-      - run: echo 127.0.0.1 database | tee -a /etc/hosts
-      - run: pip install virtualenvwrapper tox
-      - run:
-          name: Run tests
-          command: tox -e integration-snowflake-py36
-          no_output_timeout: 1h
-  integration-redshift-py36:
-    docker: *py36
-    steps:
-      - checkout
-      - run: apt-get update && apt-get install -y python3-dev postgresql
-      - run: echo 127.0.0.1 database | tee -a /etc/hosts
-      - run: pip install virtualenvwrapper tox
-      - run:
-          name: Run tests
-          command: tox -e integration-redshift-py36
-  integration-bigquery-py36:
-    docker: *py36
-    steps:
-      - checkout
-      - run: apt-get update && apt-get install -y python3-dev postgresql
-      - run: echo 127.0.0.1 database | tee -a /etc/hosts
-      - run: pip install virtualenvwrapper tox
-      - run:
-          name: Run tests
-          command: tox -e integration-bigquery-py36
-  integration-postgres-py27:
-    docker: &py27
-      - image: python:2.7
-      - image: postgres
-        environment: *pgenv
-    steps:
-      - checkout
-      - run: apt-get update && apt-get install -y python-dev postgresql
-      - run: echo 127.0.0.1 database | tee -a /etc/hosts
-      - run: pip install virtualenvwrapper tox
-      - run: *setupdb
-      - run:
-          name: Run tests
-          command: tox -e integration-postgres-py27
-  integration-snowflake-py27:
-    docker: *py27
-    steps:
-      - checkout
-      - run: apt-get update && apt-get install -y python-dev postgresql
-      - run: echo 127.0.0.1 database | tee -a /etc/hosts
-      - run: pip install virtualenvwrapper tox
-      - run:
-          name: Run tests
-          command: tox -e integration-snowflake-py27
-          no_output_timeout: 1h
-  integration-redshift-py27:
-    docker: *py27
-    steps:
-      - checkout
-      - run: apt-get update && apt-get install -y python-dev postgresql
-      - run: echo 127.0.0.1 database | tee -a /etc/hosts
-      - run: pip install virtualenvwrapper tox
-      - run:
-          name: Run tests
-          command: tox -e integration-redshift-py27
-  integration-bigquery-py27:
-    docker: *py27
-    steps:
-      - checkout
-      - run: apt-get update && apt-get install -y python-dev postgresql
-      - run: echo 127.0.0.1 database | tee -a /etc/hosts
-      - run: pip install virtualenvwrapper tox
-      - run:
-          name: Run tests
-          command: tox -e integration-bigquery-py27
-
-workflows:
-  version: 2
-  test-everything:
-    jobs:
-      - unit
-      - integration-postgres-py36:
-          requires:
-            - unit
-      - integration-postgres-py27:
-          requires:
-            - unit
-      - integration-redshift-py27:
-          requires:
-            - integration-postgres-py27
-      - integration-bigquery-py27:
-          requires:
-            - integration-postgres-py27
-      - integration-snowflake-py27:
-          requires:
-            - integration-postgres-py27
-      - integration-redshift-py36:
-          requires:
-            - integration-postgres-py36
-      - integration-bigquery-py36:
-          requires:
-            - integration-postgres-py36
-      - integration-snowflake-py36:
-          requires:
-            - integration-postgres-py36

.coveragerc

@@ -1,3 +0,0 @@
-[report]
-include =
-  dbt/*

.dockerignore

@@ -0,0 +1,3 @@
+*
+!docker/requirements/*.txt
+!dist

.flake8

@@ -0,0 +1,12 @@
+[flake8]
+select =
+    E
+    W
+    F
+ignore =
+    W503 # makes Flake8 work like black
+    W504
+    E203 # makes Flake8 work like black
+    E741
+    E501 # long line checking is done in black
+exclude = test

.git-blame-ignore-revs

@@ -0,0 +1,2 @@
+# Reformatting dbt-core via black, flake8, mypy, and assorted pre-commit hooks.
+43e3fc22c4eae4d3d901faba05e33c40f1f1dc5a

.github/CODEOWNERS

@@ -0,0 +1,43 @@
+# This file contains the code owners for the dbt-core repo.
+# PRs will be automatically assigned for review to the associated
+# team(s) or person(s) that touches any files that are mapped to them.
+#
+# A statement takes precedence over the statements above it so more general
+# assignments are found at the top with specific assignments being lower in
+# the ordering (i.e. catch all assignment should be the first item)
+#
+# Consult GitHub documentation for formatting guidelines:
+# https://docs.github.com/en/repositories/managing-your-repositorys-settings-and-features/customizing-your-repository/about-code-owners#example-of-a-codeowners-file
+
+# As a default for areas with no assignment,
+# the core team as a whole will be assigned
+*       @dbt-labs/core
+
+# Changes to GitHub configurations including Actions
+/.github/ @leahwicz
+
+# Language core modules
+/core/dbt/config/     @dbt-labs/core-language
+/core/dbt/context/    @dbt-labs/core-language
+/core/dbt/contracts/  @dbt-labs/core-language
+/core/dbt/deps/       @dbt-labs/core-language
+/core/dbt/parser/     @dbt-labs/core-language
+
+# Execution core modules
+/core/dbt/events/     @dbt-labs/core-execution @dbt-labs/core-language # eventually remove language but they have knowledge here now
+/core/dbt/graph/      @dbt-labs/core-execution
+/core/dbt/task/       @dbt-labs/core-execution
+
+# Adapter interface, scaffold, Postgres plugin
+/core/dbt/adapters    @dbt-labs/core-adapters
+/core/scripts/create_adapter_plugin.py    @dbt-labs/core-adapters
+/plugins/             @dbt-labs/core-adapters
+
+# Global project: default macros, including generic tests + materializations
+/core/dbt/include/global_project    @dbt-labs/core-execution @dbt-labs/core-adapters
+
+# Perf regression testing framework
+# This excludes the test project files itself since those aren't specific
+# framework changes (excluded by not setting an owner next to it- no owner)
+/performance @nathaniel-may
+/performance/projects

.github/ISSUE_TEMPLATE.md

@@ -1,34 +0,0 @@
-Please make sure to fill out either the issue template or the feature template and delete the other one!
-
-## Issue
-
-### Issue description
-In general terms, please describe the issue. What command did you run?
-
-### Results
-What happened? What did you expect to happen?
-
-### System information
-The output of `dbt --version`:
-```
-<output goes here>
-```
-
-The operating system you're running on:
-
-The python version you're using (probably the output of `python --version`)
-
-### Steps to reproduce
-In as much detail as possible, please provide steps to reproduce the issue. Sample data that triggers the issue, example models, etc are all very helpful here.
-
-
-
-
-
-## Feature
-
-### Feature description
-Please describe the feature you would like dbt to have. Please provide any details, relevant documentation links, StackOverflow links, etc here.
-
-### Who will this benefit?
-What kind of use case will this feature be useful for? Please be specific and provide examples, this will help us prioritize properly.

.github/ISSUE_TEMPLATE/bug-report.yml

@@ -0,0 +1,85 @@
+name: 🐞 Bug
+description: Report a bug or an issue you've found with dbt
+title: "[Bug] <title>"
+labels: ["bug", "triage"]
+body:
+  - type: markdown
+    attributes:
+      value: |
+        Thanks for taking the time to fill out this bug report!
+  - type: checkboxes
+    attributes:
+      label: Is there an existing issue for this?
+      description: Please search to see if an issue already exists for the bug you encountered.
+      options:
+        - label: I have searched the existing issues
+          required: true
+  - type: textarea
+    attributes:
+      label: Current Behavior
+      description: A concise description of what you're experiencing.
+    validations:
+      required: false
+  - type: textarea
+    attributes:
+      label: Expected Behavior
+      description: A concise description of what you expected to happen.
+    validations:
+      required: false
+  - type: textarea
+    attributes:
+      label: Steps To Reproduce
+      description: Steps to reproduce the behavior.
+      placeholder: |
+        1. In this environment...
+        2. With this config...
+        3. Run '...'
+        4. See error...
+    validations:
+      required: false
+  - type: textarea
+    id: logs
+    attributes:
+      label: Relevant log output
+      description: |
+        If applicable, log output to help explain your problem.
+      render: shell
+    validations:
+      required: false
+  - type: textarea
+    attributes:
+      label: Environment
+      description: |
+        examples:
+          - **OS**: Ubuntu 20.04
+          - **Python**: 3.7.2 (`python --version`)
+          - **dbt**: 0.21.0 (`dbt --version`)
+      value: |
+        - OS:
+        - Python:
+        - dbt:
+      render: markdown
+    validations:
+      required: false
+  - type: dropdown
+    id: database
+    attributes:
+      label: What database are you using dbt with?
+      multiple: true
+      options:
+        - postgres
+        - redshift
+        - snowflake
+        - bigquery
+        - other (mention it in "Additional Context")
+    validations:
+      required: false
+  - type: textarea
+    attributes:
+      label: Additional Context
+      description: |
+        Links? References? Anything that will give us more context about the issue you are encountering!
+
+        Tip: You can attach images or log files by clicking this area to highlight it and then dragging files in.
+    validations:
+      required: false

.github/ISSUE_TEMPLATE/config.yml

@@ -0,0 +1,16 @@
+contact_links:
+  - name: Create an issue for dbt-redshift
+    url: https://github.com/dbt-labs/dbt-redshift/issues/new/choose
+    about: Report a bug or request a feature for dbt-redshift
+  - name: Create an issue for dbt-bigquery
+    url: https://github.com/dbt-labs/dbt-bigquery/issues/new/choose
+    about: Report a bug or request a feature for dbt-bigquery
+  - name: Create an issue for dbt-snowflake
+    url: https://github.com/dbt-labs/dbt-snowflake/issues/new/choose
+    about: Report a bug or request a feature for dbt-snowflake
+  - name: Ask a question or get support
+    url: https://docs.getdbt.com/docs/guides/getting-help
+    about: Ask a question or request support
+  - name: Questions on Stack Overflow
+    url: https://stackoverflow.com/questions/tagged/dbt
+    about: Look at questions/answers at Stack Overflow

.github/ISSUE_TEMPLATE/feature-request.yml

@@ -0,0 +1,49 @@
+name: ✨ Feature
+description: Suggest an idea for dbt
+title: "[Feature] <title>"
+labels: ["enhancement", "triage"]
+body:
+  - type: markdown
+    attributes:
+      value: |
+        Thanks for taking the time to fill out this feature requests!
+  - type: checkboxes
+    attributes:
+      label: Is there an existing feature request for this?
+      description: Please search to see if an issue already exists for the feature you would like.
+      options:
+        - label: I have searched the existing issues
+          required: true
+  - type: textarea
+    attributes:
+      label: Describe the Feature
+      description: A clear and concise description of what you want to happen.
+    validations:
+      required: true
+  - type: textarea
+    attributes:
+      label: Describe alternatives you've considered
+      description: |
+        A clear and concise description of any alternative solutions or features you've considered.
+    validations:
+      required: false
+  - type: textarea
+    attributes:
+      label: Who will this benefit?
+      description: |
+        What kind of use case will this feature be useful for? Please be specific and provide examples, this will help us prioritize properly.
+    validations:
+      required: false
+  - type: input
+    attributes:
+      label: Are you interested in contributing this feature?
+      description: Let us know if you want to write some code, and how we can help.
+    validations:
+      required: false
+  - type: textarea
+    attributes:
+      label: Anything else?
+      description: |
+        Links? References? Anything that will give us more context about the feature you are suggesting!
+    validations:
+      required: false

.github/actions/latest-wrangler/Dockerfile

@@ -0,0 +1,14 @@
+FROM python:3-slim AS builder
+ADD . /app
+WORKDIR /app
+
+# We are installing a dependency here directly into our app source dir
+RUN pip install --target=/app requests packaging
+
+# A distroless container image with Python and some basics like SSL certificates
+# https://github.com/GoogleContainerTools/distroless
+FROM gcr.io/distroless/python3-debian10
+COPY --from=builder /app /app
+WORKDIR /app
+ENV PYTHONPATH /app
+CMD ["/app/main.py"]

.github/actions/latest-wrangler/README.md

@@ -0,0 +1,50 @@
+# Github package 'latest' tag wrangler for containers
+## Usage
+
+Plug in the necessary inputs to determine if the container being built should be tagged 'latest; at the package level, for example `dbt-redshift:latest`.
+
+## Inputs
+| Input | Description |
+| - | - |
+| `package` | Name of the GH package to check against |
+| `new_version` | Semver of new container |
+| `gh_token` | GH token with package read scope|
+| `halt_on_missing` | Return non-zero exit code if requested package does not exist. (defaults to false)|
+
+
+## Outputs
+| Output | Description |
+| - | - |
+| `latest` | Wether or not the new container should be tagged 'latest'|
+| `minor_latest` | Wether or not the new container should be tagged major.minor.latest |
+
+## Example workflow
+```yaml
+name: Ship it!
+on:
+  workflow_dispatch:
+    inputs:
+      package:
+       description: The package to publish
+       required: true
+      version_number:
+       description: The version number
+       required: true
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/checkout@v1
+    - name: Wrangle latest tag
+      id: is_latest
+      uses: ./.github/actions/latest-wrangler
+      with:
+        package: ${{ github.event.inputs.package }}
+        new_version: ${{ github.event.inputs.new_version }}
+        gh_token: ${{ secrets.GITHUB_TOKEN }}
+    - name: Print the results
+      run: |
+        echo "Is it latest?  Survey says: ${{ steps.is_latest.outputs.latest }} !"
+        echo "Is it minor.latest?  Survey says: ${{ steps.is_latest.outputs.minor_latest }} !"
+```

.github/actions/latest-wrangler/action.yml

@@ -0,0 +1,20 @@
+name: "Github package 'latest' tag wrangler for containers"
+description: "Determines wether or not a given dbt container should be given a bare 'latest' tag (I.E. dbt-core:latest)"
+inputs:
+  package_name:
+    description: "Package to check (I.E. dbt-core, dbt-redshift, etc)"
+    required: true
+  new_version:
+    description: "Semver of the container being built (I.E. 1.0.4)"
+    required: true
+  gh_token:
+    description: "Auth token for github (must have view packages scope)"
+    required: true
+outputs:
+  latest:
+    description: "Wether or not built container should be tagged latest (bool)"
+  minor_latest:
+    description: "Wether or not built container should be tagged minor.latest (bool)"
+runs:
+  using: "docker"
+  image: "Dockerfile"

.github/actions/latest-wrangler/examples/example_workflow.yml

@@ -0,0 +1,26 @@
+name: Ship it!
+on:
+  workflow_dispatch:
+    inputs:
+      package:
+       description: The package to publish
+       required: true
+      version_number:
+       description: The version number
+       required: true
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/checkout@v1
+    - name: Wrangle latest tag
+      id: is_latest
+      uses: ./.github/actions/latest-wrangler
+      with:
+        package: ${{ github.event.inputs.package }}
+        new_version: ${{ github.event.inputs.new_version }}
+        gh_token: ${{ secrets.GITHUB_TOKEN }}
+    - name: Print the results
+      run: |
+        echo "Is it latest?  Survey says: ${{ steps.is_latest.outputs.latest }} !"

.github/actions/latest-wrangler/examples/example_workflow_dispatch.json

@@ -0,0 +1,6 @@
+{
+    "inputs": {
+      "version_number": "1.0.1",
+      "package": "dbt-redshift"
+    }
+}

.github/actions/latest-wrangler/main.py

@@ -0,0 +1,95 @@
+import os
+import sys
+import requests
+from distutils.util import strtobool
+from typing import Union
+from packaging.version import parse, Version
+
+if __name__ == "__main__":
+
+    # get inputs
+    package = os.environ["INPUT_PACKAGE"]
+    new_version = parse(os.environ["INPUT_NEW_VERSION"])
+    gh_token = os.environ["INPUT_GH_TOKEN"]
+    halt_on_missing = strtobool(os.environ.get("INPUT_HALT_ON_MISSING", "False"))
+
+    # get package metadata from github
+    package_request = requests.get(
+        f"https://api.github.com/orgs/dbt-labs/packages/container/{package}/versions",
+        auth=("", gh_token),
+    )
+    package_meta = package_request.json()
+
+    # Log info if we don't get a 200
+    if package_request.status_code != 200:
+        print(f"Call to GH API failed: {package_request.status_code} {package_meta['message']}")
+
+    # Make an early exit if there is no matching package in github
+    if package_request.status_code == 404:
+        if halt_on_missing:
+            sys.exit(1)
+        else:
+            # everything is the latest if the package doesn't exist
+            print(f"::set-output name=latest::{True}")
+            print(f"::set-output name=minor_latest::{True}")
+            sys.exit(0)
+
+    # TODO: verify package meta is "correct"
+    # https://github.com/dbt-labs/dbt-core/issues/4640
+
+    # map versions and tags
+    version_tag_map = {
+        version["id"]: version["metadata"]["container"]["tags"] for version in package_meta
+    }
+
+    # is pre-release
+    pre_rel = True if any(x in str(new_version) for x in ["a", "b", "rc"]) else False
+
+    # semver of current latest
+    for version, tags in version_tag_map.items():
+        if "latest" in tags:
+            # N.B. This seems counterintuitive, but we expect any version tagged
+            # 'latest' to have exactly three associated tags:
+            # latest, major.minor.latest, and major.minor.patch.
+            # Subtracting everything that contains the string 'latest' gets us
+            # the major.minor.patch which is what's needed for comparison.
+            current_latest = parse([tag for tag in tags if "latest" not in tag][0])
+        else:
+            current_latest = False
+
+    # semver of current_minor_latest
+    for version, tags in version_tag_map.items():
+        if f"{new_version.major}.{new_version.minor}.latest" in tags:
+            # Similar to above, only now we expect exactly two tags:
+            # major.minor.patch and major.minor.latest
+            current_minor_latest = parse([tag for tag in tags if "latest" not in tag][0])
+        else:
+            current_minor_latest = False
+
+    def is_latest(
+        pre_rel: bool, new_version: Version, remote_latest: Union[bool, Version]
+    ) -> bool:
+        """Determine if a given contaier should be tagged 'latest' based on:
+         - it's pre-release status
+         - it's version
+         - the version of a previously identified container tagged 'latest'
+
+        :param pre_rel: Wether or not the version of the new container is a pre-release
+        :param new_version: The version of the new container
+        :param remote_latest: The version of the previously identified container that's
+            already tagged latest or False
+        """
+        # is a pre-release = not latest
+        if pre_rel:
+            return False
+        # + no latest tag found = is latest
+        if not remote_latest:
+            return True
+        # + if remote version is lower than current = is latest, else not latest
+        return True if remote_latest <= new_version else False
+
+    latest = is_latest(pre_rel, new_version, current_latest)
+    minor_latest = is_latest(pre_rel, new_version, current_minor_latest)
+
+    print(f"::set-output name=latest::{latest}")
+    print(f"::set-output name=minor_latest::{minor_latest}")

.github/actions/setup-postgres-linux/action.yml

@@ -0,0 +1,10 @@
+name: "Set up postgres (linux)"
+description: "Set up postgres service on linux vm for dbt integration tests"
+runs:
+  using: "composite"
+  steps:
+    - shell: bash
+      run: |
+        sudo systemctl start postgresql.service
+        pg_isready
+        sudo -u postgres bash ${{ github.action_path }}/setup_db.sh

.github/actions/setup-postgres-linux/setup_db.sh

@@ -0,0 +1 @@
+../../../test/setup_db.sh

.github/actions/setup-postgres-macos/action.yml

@@ -0,0 +1,24 @@
+name: "Set up postgres (macos)"
+description: "Set up postgres service on macos vm for dbt integration tests"
+runs:
+  using: "composite"
+  steps:
+    - shell: bash
+      run: |
+        brew services start postgresql
+        echo "Check PostgreSQL service is running"
+        i=10
+        COMMAND='pg_isready'
+        while [ $i -gt -1 ]; do
+            if [ $i == 0 ]; then
+                echo "PostgreSQL service not ready, all attempts exhausted"
+                exit 1
+            fi
+            echo "Check PostgreSQL service status"
+            eval $COMMAND && break
+            echo "PostgreSQL service not ready, wait 10 more sec, attempts left: $i"
+            sleep 10
+            ((i--))
+        done
+        createuser -s postgres
+        bash ${{ github.action_path }}/setup_db.sh

.github/actions/setup-postgres-macos/setup_db.sh

@@ -0,0 +1 @@
+../../../test/setup_db.sh

.github/actions/setup-postgres-windows/action.yml

@@ -0,0 +1,12 @@
+name: "Set up postgres (windows)"
+description: "Set up postgres service on windows vm for dbt integration tests"
+runs:
+  using: "composite"
+  steps:
+    - shell: pwsh
+      run: |
+        $pgService = Get-Service -Name postgresql*
+        Set-Service -InputObject $pgService -Status running -StartupType automatic
+        Start-Process -FilePath "$env:PGBIN\pg_isready" -Wait -PassThru
+        $env:Path += ";$env:PGBIN"
+        bash ${{ github.action_path }}/setup_db.sh

.github/actions/setup-postgres-windows/setup_db.sh

@@ -0,0 +1 @@
+../../../test/setup_db.sh

.github/dependabot.yml

@@ -0,0 +1,30 @@
+version: 2
+updates:
+  # python dependencies
+  - package-ecosystem: "pip"
+    directory: "/"
+    schedule:
+      interval: "daily"
+    rebase-strategy: "disabled"
+  - package-ecosystem: "pip"
+    directory: "/core"
+    schedule:
+      interval: "daily"
+    rebase-strategy: "disabled"
+  - package-ecosystem: "pip"
+    directory: "/plugins/postgres"
+    schedule:
+      interval: "daily"
+    rebase-strategy: "disabled"
+
+  # docker dependencies
+  - package-ecosystem: "docker"
+    directory: "/"
+    schedule:
+      interval: "weekly"
+    rebase-strategy: "disabled"
+  - package-ecosystem: "docker"
+    directory: "/docker"
+    schedule:
+      interval: "weekly"
+    rebase-strategy: "disabled"

.github/pull_request_template.md

@@ -0,0 +1,21 @@
+resolves #
+
+<!---
+  Include the number of the issue addressed by this PR above if applicable.
+  PRs for code changes without an associated issue *will not be merged*.
+  See CONTRIBUTING.md for more information.
+-->
+
+### Description
+
+<!---
+  Describe the Pull Request here. Add any references and info to help reviewers
+  understand your changes. Include any tradeoffs you considered.
+-->
+
+### Checklist
+
+- [ ] I have signed the [CLA](https://docs.getdbt.com/docs/contributor-license-agreements)
+- [ ] I have run this code in development and it appears to resolve the stated issue
+- [ ] This PR includes tests, or tests are not required/relevant for this PR
+- [ ] I have added information about my change to be included in the [CHANGELOG](https://github.com/dbt-labs/dbt-core/blob/main/CONTRIBUTING.md#Adding-CHANGELOG-Entry).

.github/workflows/backport.yml

@@ -0,0 +1,34 @@
+# **what?**
+# When a PR is merged, if it has the backport label, it will create
+# a new PR to backport those changes to the given branch. If it can't
+# cleanly do a backport, it will comment on the merged PR of the failure.
+#
+# Label naming convention: "backport <branch name to backport to>"
+# Example: backport 1.0.latest
+#
+# You MUST "Squash and merge" the original PR or this won't work.
+
+# **why?**
+# Changes sometimes need to be backported to release branches.
+# This automates the backporting process
+
+# **when?**
+# Once a PR is "Squash and merge"'d and it has been correctly labeled
+# according to the naming convention.
+
+name: Backport
+on:
+  pull_request:
+    types:
+      - closed
+      - labeled
+
+jobs:
+  backport:
+    runs-on: ubuntu-18.04
+    name: Backport
+    steps:
+      - name: Backport
+        uses: dbt-labs/backport@v1.1.1
+        with:
+          github_token: ${{ secrets.GITHUB_TOKEN }}

.github/workflows/changelog-check.yml

@@ -0,0 +1,78 @@
+# **what?**
+# Checks that a file has been committed under the /.changes directory
+# as a new CHANGELOG entry.  Cannot check for a specific filename as
+# it is dynamically generated by change type and timestamp.
+# This workflow should not require any secrets since it runs for PRs
+# from forked repos.
+# By default, secrets are not passed to workflows running from
+# a forked repo.
+
+# **why?**
+# Ensure code change gets reflected in the CHANGELOG.
+
+# **when?**
+# This will run for all PRs going into main and *.latest.  It will
+# run when they are opened, reopened, when any label is added or removed
+# and when new code is pushed to the branch.  The action will then get
+# skipped if the 'Skip Changelog' label is present is any of the labels.
+
+name: Check Changelog Entry
+
+on:
+  pull_request:
+    types: [opened, reopened, labeled, unlabeled, synchronize]
+  workflow_dispatch:
+
+defaults:
+  run:
+    shell: bash
+
+permissions:
+  contents: read
+  pull-requests: write
+
+env:
+  changelog_comment: 'Thank you for your pull request! We could not find a changelog entry for this change. For details on how to document a change, see [the contributing guide](https://github.com/dbt-labs/dbt-core/blob/main/CONTRIBUTING.md#adding-changelog-entry).'
+
+jobs:
+  changelog:
+    name: changelog
+    if: "!contains(github.event.pull_request.labels.*.name, 'Skip Changelog')"
+
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Check if changelog file was added
+        # https://github.com/marketplace/actions/paths-changes-filter
+        # For each filter, it sets output variable named by the filter to the text:
+        #  'true' - if any of changed files matches any of filter rules
+        #  'false' - if none of changed files matches any of filter rules
+        # also, returns:
+        #  `changes` - JSON array with names of all filters matching any of the changed files
+        uses: dorny/paths-filter@v2
+        id: filter
+        with:
+          token: ${{ secrets.GITHUB_TOKEN }}
+          filters: |
+            changelog:
+              - added: '.changes/unreleased/**.yaml'
+      - name: Check if comment already exists
+        uses: peter-evans/find-comment@v1
+        id: changelog_comment
+        with:
+          issue-number: ${{ github.event.pull_request.number }}
+          comment-author: 'github-actions[bot]'
+          body-includes: ${{ env.changelog_comment }}
+      - name: Create PR comment if changelog entry is missing, required, and does nto exist
+        if: |
+          steps.filter.outputs.changelog == 'false' &&
+          steps.changelog_comment.outputs.comment-body == ''
+        uses: peter-evans/create-or-update-comment@v1
+        with:
+          issue-number: ${{ github.event.pull_request.number }}
+          body: ${{ env.changelog_comment }}
+      - name: Fail job if changelog entry is missing and required
+        if: steps.filter.outputs.changelog == 'false'
+        uses: actions/github-script@v6
+        with:
+          script: core.setFailed('Changelog entry required to merge.')

.github/workflows/jira-creation.yml

@@ -0,0 +1,26 @@
+# **what?**
+# Mirrors issues into Jira. Includes the information: title,
+# GitHub Issue ID and URL
+
+# **why?**
+# Jira is our tool for tracking and we need to see these issues in there
+
+# **when?**
+# On issue creation or when an issue is labeled `Jira`
+
+name: Jira Issue Creation
+
+on:
+  issues:
+    types: [opened, labeled]
+
+permissions:
+  issues: write
+
+jobs:
+  call-label-action:
+    uses: dbt-labs/jira-actions/.github/workflows/jira-creation.yml@main
+    secrets:
+      JIRA_BASE_URL: ${{ secrets.JIRA_BASE_URL }}
+      JIRA_USER_EMAIL: ${{ secrets.JIRA_USER_EMAIL }}
+      JIRA_API_TOKEN: ${{ secrets.JIRA_API_TOKEN }}

.github/workflows/jira-label.yml

@@ -0,0 +1,26 @@
+# **what?**
+# Calls mirroring Jira label Action. Includes adding a new label
+# to an existing issue or removing a label as well
+
+# **why?**
+# Jira is our tool for tracking and we need to see these labels in there
+
+# **when?**
+# On labels being added or removed from issues
+
+name: Jira Label Mirroring
+
+on:
+  issues:
+    types: [labeled, unlabeled]
+
+permissions:
+  issues: read
+
+jobs:
+  call-label-action:
+    uses: dbt-labs/jira-actions/.github/workflows/jira-label.yml@main
+    secrets:
+      JIRA_BASE_URL: ${{ secrets.JIRA_BASE_URL }}
+      JIRA_USER_EMAIL: ${{ secrets.JIRA_USER_EMAIL }}
+      JIRA_API_TOKEN: ${{ secrets.JIRA_API_TOKEN }}

.github/workflows/jira-transition.yml

@@ -0,0 +1,24 @@
+# **what?**
+# Transition a Jira issue to a new state
+# Only supports these GitHub Issue transitions:
+#   closed, deleted, reopened
+
+# **why?**
+# Jira needs to be kept up-to-date
+
+# **when?**
+# On issue closing, deletion, reopened
+
+name: Jira Issue Transition
+
+on:
+  issues:
+    types: [closed, deleted, reopened]
+
+jobs:
+  call-label-action:
+    uses: dbt-labs/jira-actions/.github/workflows/jira-transition.yml@main
+    secrets:
+      JIRA_BASE_URL: ${{ secrets.JIRA_BASE_URL }}
+      JIRA_USER_EMAIL: ${{ secrets.JIRA_USER_EMAIL }}
+      JIRA_API_TOKEN: ${{ secrets.JIRA_API_TOKEN }}

.github/workflows/main.yml

@@ -0,0 +1,225 @@
+# **what?**
+# Runs code quality checks, unit tests, integration tests and
+# verifies python build on all code commited to the repository. This workflow
+# should not require any secrets since it runs for PRs from forked repos. By
+# default, secrets are not passed to workflows running from a forked repos.
+
+# **why?**
+# Ensure code for dbt meets a certain quality standard.
+
+# **when?**
+# This will run for all PRs, when code is pushed to a release
+# branch, and when manually triggered.
+
+name: Tests and Code Checks
+
+on:
+  push:
+    branches:
+      - "main"
+      - "*.latest"
+      - "releases/*"
+  pull_request:
+  workflow_dispatch:
+
+permissions: read-all
+
+# will cancel previous workflows triggered by the same event and for the same ref for PRs or same SHA otherwise
+concurrency:
+  group: ${{ github.workflow }}-${{ github.event_name }}-${{ contains(github.event_name, 'pull_request') && github.event.pull_request.head.ref || github.sha }}
+  cancel-in-progress: true
+
+defaults:
+  run:
+    shell: bash
+
+jobs:
+  code-quality:
+    name: code-quality
+
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Check out the repository
+        uses: actions/checkout@v2
+
+      - name: Set up Python
+        uses: actions/setup-python@v2
+
+      - name: Install python dependencies
+        run: |
+          pip install --user --upgrade pip
+          pip --version
+          pip install pre-commit
+          pre-commit --version
+          pip install mypy==0.782
+          mypy --version
+          pip install -r editable-requirements.txt
+          dbt --version
+
+      - name: Run pre-commit hooks
+        run: pre-commit run --all-files --show-diff-on-failure
+
+  unit:
+    name: unit test / python ${{ matrix.python-version }}
+
+    runs-on: ubuntu-latest
+
+    strategy:
+      fail-fast: false
+      matrix:
+        python-version: ['3.7', '3.8', '3.9', '3.10']
+
+    env:
+      TOXENV: "unit"
+      PYTEST_ADDOPTS: "-v --color=yes --csv unit_results.csv"
+
+    steps:
+      - name: Check out the repository
+        uses: actions/checkout@v2
+
+      - name: Set up Python ${{ matrix.python-version }}
+        uses: actions/setup-python@v2
+        with:
+          python-version: ${{ matrix.python-version }}
+
+      - name: Install python dependencies
+        run: |
+          pip install --user --upgrade pip
+          pip --version
+          pip install tox
+          tox --version
+
+      - name: Run tox
+        run: tox
+
+      - name: Get current date
+        if: always()
+        id: date
+        run: echo "::set-output name=date::$(date +'%Y-%m-%dT%H_%M_%S')" #no colons allowed for artifacts
+
+      - uses: actions/upload-artifact@v2
+        if: always()
+        with:
+          name: unit_results_${{ matrix.python-version }}-${{ steps.date.outputs.date }}.csv
+          path: unit_results.csv
+
+  integration:
+    name: integration test / python ${{ matrix.python-version }} / ${{ matrix.os }}
+
+    runs-on: ${{ matrix.os }}
+
+    strategy:
+      fail-fast: false
+      matrix:
+        python-version: ['3.7', '3.8', '3.9', '3.10']
+        os: [ubuntu-latest]
+        include:
+          - python-version: 3.8
+            os: windows-latest
+          - python-version: 3.8
+            os: macos-latest
+
+    env:
+      TOXENV: integration
+      PYTEST_ADDOPTS: "-v --color=yes -n4 --csv integration_results.csv"
+      DBT_INVOCATION_ENV: github-actions
+
+    steps:
+      - name: Check out the repository
+        uses: actions/checkout@v2
+
+      - name: Set up Python ${{ matrix.python-version }}
+        uses: actions/setup-python@v2
+        with:
+          python-version: ${{ matrix.python-version }}
+
+      - name: Set up postgres (linux)
+        if: runner.os == 'Linux'
+        uses: ./.github/actions/setup-postgres-linux
+
+      - name: Set up postgres (macos)
+        if: runner.os == 'macOS'
+        uses: ./.github/actions/setup-postgres-macos
+
+      - name: Set up postgres (windows)
+        if: runner.os == 'Windows'
+        uses: ./.github/actions/setup-postgres-windows
+
+      - name: Install python tools
+        run: |
+          # pip install --user --upgrade pip
+          # pip --version
+          pip install tox
+          tox --version
+
+      - name: Run tests
+        run: tox
+
+      - name: Get current date
+        if: always()
+        id: date
+        run: echo "::set-output name=date::$(date +'%Y_%m_%dT%H_%M_%S')" #no colons allowed for artifacts
+
+      - uses: actions/upload-artifact@v2
+        if: always()
+        with:
+          name: logs_${{ matrix.python-version }}_${{ matrix.os }}_${{ steps.date.outputs.date }}
+          path: ./logs
+
+      - uses: actions/upload-artifact@v2
+        if: always()
+        with:
+          name: integration_results_${{ matrix.python-version }}_${{ matrix.os }}_${{ steps.date.outputs.date }}.csv
+          path: integration_results.csv
+
+  build:
+    name: build packages
+
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Check out the repository
+        uses: actions/checkout@v2
+
+      - name: Set up Python
+        uses: actions/setup-python@v2
+        with:
+          python-version: 3.8
+
+      - name: Install python dependencies
+        run: |
+          pip install --user --upgrade pip
+          pip install --upgrade setuptools wheel twine check-wheel-contents
+          pip --version
+
+      - name: Build distributions
+        run: ./scripts/build-dist.sh
+
+      - name: Show distributions
+        run: ls -lh dist/
+
+      - name: Check distribution descriptions
+        run: |
+          twine check dist/*
+
+      - name: Check wheel contents
+        run: |
+          check-wheel-contents dist/*.whl --ignore W007,W008
+
+      - name: Install wheel distributions
+        run: |
+          find ./dist/*.whl -maxdepth 1 -type f | xargs pip install --force-reinstall --find-links=dist/
+
+      - name: Check wheel distributions
+        run: |
+          dbt --version
+
+      - name: Install source distributions
+        # ignore dbt-1.0.0, which intentionally raises an error when installed from source
+        run: |
+          find ./dist/dbt-[a-z]*.gz -maxdepth 1 -type f | xargs pip install --force-reinstall --find-links=dist/
+
+      - name: Check source distributions
+        run: |
+          dbt --version

.github/workflows/release-docker.yml

@@ -0,0 +1,116 @@
+# **what?**
+# This workflow will generate a series of docker images for dbt and push them to the github container registry
+
+# **why?**
+# Docker images for dbt are used in a number of important places throughout the dbt ecosystem.  This is how we keep those images up-to-date.
+
+# **when?**
+# This is triggered manually
+
+# **next steps**
+# - build this into the release workflow (or conversly, break out the different release methods into their own workflow files)
+
+name: Docker release
+
+permissions:
+  packages: write
+
+on:
+  workflow_dispatch:
+    inputs:
+      package:
+       description: The package to release. _One_ of [dbt-core, dbt-redshift, dbt-bigquery, dbt-snowflake, dbt-spark, dbt-postgres]
+       required: true
+      version_number:
+       description: The release version number (i.e. 1.0.0b1). Do not include `latest` tags or a leading `v`!
+       required: true
+
+jobs:
+  get_version_meta:
+    name: Get version meta
+    runs-on: ubuntu-latest
+    outputs:
+      major: ${{ steps.version.outputs.major }}
+      minor: ${{ steps.version.outputs.minor }}
+      patch: ${{ steps.version.outputs.patch }}
+      latest: ${{ steps.latest.outputs.latest }}
+      minor_latest: ${{ steps.latest.outputs.minor_latest }}
+    steps:
+      - uses: actions/checkout@v1
+      - name: Split version
+        id: version
+        run: |
+          IFS="." read -r MAJOR MINOR PATCH <<< ${{ github.event.inputs.version_number }}
+          echo "::set-output name=major::$MAJOR"
+          echo "::set-output name=minor::$MINOR"
+          echo "::set-output name=patch::$PATCH"
+
+      - name: Is pkg 'latest'
+        id: latest
+        uses: ./.github/actions/latest-wrangler
+        with:
+          package: ${{ github.event.inputs.package }}
+          new_version: ${{ github.event.inputs.version_number }}
+          gh_token: ${{ secrets.GITHUB_TOKEN }}
+          halt_on_missing: False
+
+  setup_image_builder:
+    name: Set up docker image builder
+    runs-on: ubuntu-latest
+    needs: [get_version_meta]
+    steps:
+      - name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v1
+
+  build_and_push:
+    name: Build images and push to GHCR
+    runs-on: ubuntu-latest
+    needs: [setup_image_builder, get_version_meta]
+    steps:
+      - name: Get docker build arg
+        id: build_arg
+        run: |
+          echo "::set-output name=build_arg_name::"$(echo ${{ github.event.inputs.package }} | sed 's/\-/_/g')
+          echo "::set-output name=build_arg_value::"$(echo ${{ github.event.inputs.package }} | sed 's/postgres/core/g')
+
+      - name: Log in to the GHCR
+        uses: docker/login-action@v1
+        with:
+          registry: ghcr.io
+          username: ${{ github.actor }}
+          password: ${{ secrets.GITHUB_TOKEN }}
+
+      - name: Build and push MAJOR.MINOR.PATCH tag
+        uses: docker/build-push-action@v2
+        with:
+          file: docker/Dockerfile
+          push: True
+          target: ${{ github.event.inputs.package }}
+          build-args: |
+            ${{ steps.build_arg.outputs.build_arg_name }}_ref=${{ steps.build_arg.outputs.build_arg_value }}@v${{ github.event.inputs.version_number }}
+          tags: |
+            ghcr.io/dbt-labs/${{ github.event.inputs.package }}:${{ github.event.inputs.version_number }}
+
+      - name: Build and push MINOR.latest tag
+        uses: docker/build-push-action@v2
+        if: ${{ needs.get_version_meta.outputs.minor_latest == 'True' }}
+        with:
+          file: docker/Dockerfile
+          push: True
+          target: ${{ github.event.inputs.package }}
+          build-args: |
+            ${{ steps.build_arg.outputs.build_arg_name }}_ref=${{ steps.build_arg.outputs.build_arg_value }}@v${{ github.event.inputs.version_number }}
+          tags: |
+            ghcr.io/dbt-labs/${{ github.event.inputs.package }}:${{ needs.get_version_meta.outputs.major }}.${{ needs.get_version_meta.outputs.minor }}.latest
+
+      - name: Build and push latest tag
+        uses: docker/build-push-action@v2
+        if: ${{ needs.get_version_meta.outputs.latest == 'True' }}
+        with:
+          file: docker/Dockerfile
+          push: True
+          target: ${{ github.event.inputs.package }}
+          build-args: |
+            ${{ steps.build_arg.outputs.build_arg_name }}_ref=${{ steps.build_arg.outputs.build_arg_value }}@v${{ github.event.inputs.version_number }}
+          tags: |
+            ghcr.io/dbt-labs/${{ github.event.inputs.package }}:latest

.github/workflows/release.yml

@@ -0,0 +1,199 @@
+# **what?**
+# Take the given commit, run unit tests specifically on that sha, build and
+# package it, and then release to GitHub and PyPi with that specific build
+
+# **why?**
+# Ensure an automated and tested release process
+
+# **when?**
+# This will only run manually with a given sha and version
+
+name: Release to GitHub and PyPi
+
+on:
+  workflow_dispatch:
+    inputs:
+      sha:
+       description: 'The last commit sha in the release'
+       required: true
+      version_number:
+       description: 'The release version number (i.e. 1.0.0b1)'
+       required: true
+
+defaults:
+  run:
+    shell: bash
+
+jobs:
+  unit:
+    name: Unit test
+
+    runs-on: ubuntu-latest
+
+    env:
+      TOXENV: "unit"
+
+    steps:
+      - name: Check out the repository
+        uses: actions/checkout@v2
+        with:
+          persist-credentials: false
+          ref: ${{ github.event.inputs.sha }}
+
+      - name: Set up Python
+        uses: actions/setup-python@v2
+        with:
+          python-version: 3.8
+
+      - name: Install python dependencies
+        run: |
+          pip install --user --upgrade pip
+          pip install tox
+          pip --version
+          tox --version
+
+      - name: Run tox
+        run: tox
+
+  build:
+    name: build packages
+
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Check out the repository
+        uses: actions/checkout@v2
+        with:
+          persist-credentials: false
+          ref: ${{ github.event.inputs.sha }}
+
+      - name: Set up Python
+        uses: actions/setup-python@v2
+        with:
+          python-version: 3.8
+
+      - name: Install python dependencies
+        run: |
+          pip install --user --upgrade pip
+          pip install --upgrade setuptools wheel twine check-wheel-contents
+          pip --version
+
+      - name: Build distributions
+        run: ./scripts/build-dist.sh
+
+      - name: Show distributions
+        run: ls -lh dist/
+
+      - name: Check distribution descriptions
+        run: |
+          twine check dist/*
+
+      - name: Check wheel contents
+        run: |
+          check-wheel-contents dist/*.whl --ignore W007,W008
+
+      - uses: actions/upload-artifact@v2
+        with:
+          name: dist
+          path: |
+            dist/
+            !dist/dbt-${{github.event.inputs.version_number}}.tar.gz
+
+  test-build:
+    name: verify packages
+
+    needs: [build, unit]
+
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Set up Python
+        uses: actions/setup-python@v2
+        with:
+          python-version: 3.8
+
+      - name: Install python dependencies
+        run: |
+          pip install --user --upgrade pip
+          pip install --upgrade wheel
+          pip --version
+
+      - uses: actions/download-artifact@v2
+        with:
+          name: dist
+          path: dist/
+
+      - name: Show distributions
+        run: ls -lh dist/
+
+      - name: Install wheel distributions
+        run: |
+          find ./dist/*.whl -maxdepth 1 -type f | xargs pip install --force-reinstall --find-links=dist/
+
+      - name: Check wheel distributions
+        run: |
+          dbt --version
+
+      - name: Install source distributions
+        run: |
+          find ./dist/*.gz -maxdepth 1 -type f | xargs pip install --force-reinstall --find-links=dist/
+
+      - name: Check source distributions
+        run: |
+          dbt --version
+
+  github-release:
+    name: GitHub Release
+
+    needs: test-build
+
+    runs-on: ubuntu-latest
+
+    steps:
+      - uses: actions/download-artifact@v2
+        with:
+          name: dist
+          path: '.'
+
+      # Need to set an output variable because env variables can't be taken as input
+      # This is needed for the next step with releasing to GitHub
+      - name: Find release type
+        id: release_type
+        env:
+          IS_PRERELEASE: ${{ contains(github.event.inputs.version_number, 'rc') ||  contains(github.event.inputs.version_number, 'b') }}
+        run: |
+          echo ::set-output name=isPrerelease::$IS_PRERELEASE
+
+      - name: Creating GitHub Release
+        uses: softprops/action-gh-release@v1
+        with:
+          name: dbt-core v${{github.event.inputs.version_number}}
+          tag_name: v${{github.event.inputs.version_number}}
+          prerelease: ${{ steps.release_type.outputs.isPrerelease }}
+          target_commitish: ${{github.event.inputs.sha}}
+          body: |
+            [Release notes](https://github.com/dbt-labs/dbt-core/blob/main/CHANGELOG.md)
+          files: |
+            dbt_postgres-${{github.event.inputs.version_number}}-py3-none-any.whl
+            dbt_core-${{github.event.inputs.version_number}}-py3-none-any.whl
+            dbt-postgres-${{github.event.inputs.version_number}}.tar.gz
+            dbt-core-${{github.event.inputs.version_number}}.tar.gz
+
+  pypi-release:
+    name: Pypi release
+
+    runs-on: ubuntu-latest
+
+    needs: github-release
+
+    environment: PypiProd
+    steps:
+      - uses: actions/download-artifact@v2
+        with:
+          name: dist
+          path: 'dist'
+
+      - name: Publish distribution to PyPI
+        uses: pypa/gh-action-pypi-publish@v1.4.2
+        with:
+          password: ${{ secrets.PYPI_API_TOKEN }}

.github/workflows/schema-check.yml

@@ -0,0 +1,87 @@
+# **what?**
+# Compares the schema of the dbt version of the given ref vs
+# the latest official schema releases found in schemas.getdbt.com.
+# If there are differences, the workflow will fail and upload the
+# diff as an artifact. The metadata team should be alerted to the change.
+#
+# **why?**
+# Reaction work may need to be done if artifact schema changes
+# occur so we want to proactively alert to it.
+#
+# **when?**
+# On pushes to `develop` and release branches. Manual runs are also enabled.
+name: Artifact Schema Check
+
+on:
+  workflow_dispatch:
+  pull_request: #TODO: remove before merging
+  push:
+    branches:
+      - "develop"
+      - "*.latest"
+      - "releases/*"
+
+env:
+  LATEST_SCHEMA_PATH: ${{ github.workspace }}/new_schemas
+  SCHEMA_DIFF_ARTIFACT: ${{ github.workspace }}//schema_schanges.txt
+  DBT_REPO_DIRECTORY: ${{ github.workspace }}/dbt
+  SCHEMA_REPO_DIRECTORY: ${{ github.workspace }}/schemas.getdbt.com
+
+jobs:
+  checking-schemas:
+    name: "Checking schemas"
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Set up Python
+        uses: actions/setup-python@v2
+        with:
+          python-version: 3.8
+
+      - name: Checkout dbt repo
+        uses: actions/checkout@v2.3.4
+        with:
+            path: ${{ env.DBT_REPO_DIRECTORY }}
+
+      - name: Checkout schemas.getdbt.com repo
+        uses: actions/checkout@v2.3.4
+        with:
+          repository: dbt-labs/schemas.getdbt.com
+          ref: 'main'
+          ssh-key: ${{ secrets.SCHEMA_SSH_PRIVATE_KEY }}
+          path: ${{ env.SCHEMA_REPO_DIRECTORY }}
+
+      - name: Generate current schema
+        run: |
+          cd ${{ env.DBT_REPO_DIRECTORY }}
+          python3 -m venv env
+          source env/bin/activate
+          pip install --upgrade pip
+          pip install -r dev-requirements.txt -r editable-requirements.txt
+          python scripts/collect-artifact-schema.py --path ${{ env.LATEST_SCHEMA_PATH }}
+
+      # Copy generated schema files into the schemas.getdbt.com repo
+      # Do a git diff to find any changes
+      # Ignore any date or version changes though
+      - name: Compare schemas
+        run: |
+          cp -r ${{ env.LATEST_SCHEMA_PATH }}/dbt ${{ env.SCHEMA_REPO_DIRECTORY }}
+          cd ${{ env.SCHEMA_REPO_DIRECTORY }}
+          diff_results=$(git diff -I='*[0-9]{4}-(0[1-9]|1[0-2])-(0[1-9]|[1-2][0-9]|3[0-1])T' \
+          -I='*[0-9]{1}.[0-9]{2}.[0-9]{1}(rc[0-9]|b[0-9]| )' --compact-summary)
+          if [[ $(echo diff_results) ]]; then
+            echo $diff_results
+            echo "Schema changes detected!"
+            git diff -I='*[0-9]{4}-(0[1-9]|1[0-2])-(0[1-9]|[1-2][0-9]|3[0-1])T' \
+              -I='*[0-9]{1}.[0-9]{2}.[0-9]{1}(rc[0-9]|b[0-9]| )' > ${{ env.SCHEMA_DIFF_ARTIFACT }}
+            exit 1
+          else
+            echo "No schema changes detected"
+          fi
+
+      - name: Upload schema diff
+        uses: actions/upload-artifact@v2.2.4
+        if: ${{ failure() }}
+        with:
+          name: 'schema_schanges.txt'
+          path: '${{ env.SCHEMA_DIFF_ARTIFACT }}'

.github/workflows/stale.yml

@@ -0,0 +1,18 @@
+name: "Close stale issues and PRs"
+on:
+  schedule:
+    - cron: "30 1 * * *"
+
+jobs:
+  stale:
+    runs-on: ubuntu-latest
+    steps:
+      # pinned at v4 (https://github.com/actions/stale/releases/tag/v4.0.0)
+      - uses: actions/stale@cdf15f641adb27a71842045a94023bef6945e3aa
+        with:
+          stale-issue-message: "This issue has been marked as Stale because it has been open for 180 days with no activity. If you would like the issue to remain open, please remove the stale label or comment on the issue, or it will be closed in 7 days."
+          stale-pr-message: "This PR has been marked as Stale because it has been open for 180 days with no activity. If you would like the PR to remain open, please remove the stale label or comment on the PR, or it will be closed in 7 days."
+          # mark issues/PRs stale when they haven't seen activity in 180 days
+          days-before-stale: 180
+          # ignore checking issues with the following labels
+          exempt-issue-labels: "epic,discussion"

.github/workflows/structured-logging-schema-check.yml

@@ -0,0 +1,73 @@
+# This Action checks makes a dbt run to sample json structured logs
+# and checks that they conform to the currently documented schema.
+#
+# If this action fails it either means we have unintentionally deviated
+# from our documented structured logging schema, or we need to bump the
+# version of our structured logging and add new documentation to
+# communicate these changes.
+
+name: Structured Logging Schema Check
+on:
+  push:
+    branches:
+      - "main"
+      - "*.latest"
+      - "releases/*"
+  pull_request:
+  workflow_dispatch:
+
+permissions: read-all
+
+jobs:
+  # run the performance measurements on the current or default branch
+  test-schema:
+    name: Test Log Schema
+    runs-on: ubuntu-latest
+    env:
+      # turns warnings into errors
+      RUSTFLAGS: "-D warnings"
+      # points tests to the log file
+      LOG_DIR: "/home/runner/work/dbt-core/dbt-core/logs"
+      # tells integration tests to output into json format
+      DBT_LOG_FORMAT: "json"
+    steps:
+      - name: checkout dev
+        uses: actions/checkout@v2
+        with:
+          persist-credentials: false
+
+      - name: Setup Python
+        uses: actions/setup-python@v2.2.2
+        with:
+          python-version: "3.8"
+
+      - uses: actions-rs/toolchain@v1
+        with:
+          profile: minimal
+          toolchain: stable
+          override: true
+
+      - name: Install python dependencies
+        run: |
+          pip install --user --upgrade pip
+          pip --version
+          pip install tox
+          tox --version
+
+      - name: Set up postgres
+        uses: ./.github/actions/setup-postgres-linux
+
+      - name: ls
+        run: ls
+
+      # integration tests generate a ton of logs in different files. the next step will find them all.
+      # we actually care if these pass, because the normal test run doesn't usually include many json log outputs
+      - name: Run integration tests
+        run: tox -e integration -- -nauto
+
+      # apply our schema tests to every log event from the previous step
+      # skips any output that isn't valid json
+      - uses: actions-rs/cargo@v1
+        with:
+          command: run
+          args: --manifest-path test/interop/log_parsing/Cargo.toml

.github/workflows/test/.actrc

@@ -0,0 +1 @@
+-P ubuntu-latest=ghcr.io/catthehacker/ubuntu:act-latest

.github/workflows/test/.gitignore

@@ -0,0 +1 @@
+.secrets

.github/workflows/test/.secrets.EXAMPLE

@@ -0,0 +1 @@
+GITHUB_TOKEN=GH_PERSONAL_ACCESS_TOKEN_GOES_HERE

.github/workflows/test/inputs/release_docker.json

@@ -0,0 +1,6 @@
+{
+    "inputs": {
+      "version_number": "1.0.1",
+      "package": "dbt-postgres"
+    }
+}

.github/workflows/version-bump.yml

@@ -0,0 +1,109 @@
+# **what?**
+# This workflow will take a version number and a dry run flag. With that
+# it will run versionbump to update the version number everywhere in the
+# code base and then generate an update Docker requirements file. If this
+# is a dry run, a draft PR will open with the changes. If this isn't a dry
+# run, the changes will be committed to the branch this is run on.
+
+# **why?**
+# This is to aid in releasing dbt and making sure we have updated
+# the versions and Docker requirements in all places.
+
+# **when?**
+# This is triggered either manually OR
+# from the repository_dispatch event "version-bump" which is sent from
+# the dbt-release repo Action
+
+name: Version Bump
+
+on:
+  workflow_dispatch:
+    inputs:
+      version_number:
+       description: 'The version number to bump to'
+       required: true
+      is_dry_run:
+       description: 'Creates a draft PR to allow testing instead of committing to a branch'
+       required: true
+       default: 'true'
+  repository_dispatch:
+    types: [version-bump]
+
+jobs:
+  bump:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Check out the repository
+        uses: actions/checkout@v2
+
+      - name: Set version and dry run values
+        id: variables
+        env:
+          VERSION_NUMBER: "${{ github.event.client_payload.version_number == '' && github.event.inputs.version_number || github.event.client_payload.version_number }}"
+          IS_DRY_RUN: "${{ github.event.client_payload.is_dry_run == '' && github.event.inputs.is_dry_run || github.event.client_payload.is_dry_run }}"
+        run: |
+          echo Repository dispatch event version: ${{ github.event.client_payload.version_number }}
+          echo Repository dispatch event dry run: ${{ github.event.client_payload.is_dry_run }}
+          echo Workflow dispatch event version: ${{ github.event.inputs.version_number }}
+          echo Workflow dispatch event dry run: ${{ github.event.inputs.is_dry_run }}
+          echo ::set-output name=VERSION_NUMBER::$VERSION_NUMBER
+          echo ::set-output name=IS_DRY_RUN::$IS_DRY_RUN
+
+      - uses: actions/setup-python@v2
+        with:
+          python-version: "3.8"
+
+      - name: Install python dependencies
+        run: |
+          python3 -m venv env
+          source env/bin/activate
+          pip install --upgrade pip
+
+      - name: Create PR branch
+        if: ${{ steps.variables.outputs.IS_DRY_RUN == 'true' }}
+        run: |
+          git checkout -b bumping-version/${{steps.variables.outputs.VERSION_NUMBER}}_$GITHUB_RUN_ID
+          git push origin bumping-version/${{steps.variables.outputs.VERSION_NUMBER}}_$GITHUB_RUN_ID
+          git branch --set-upstream-to=origin/bumping-version/${{steps.variables.outputs.VERSION_NUMBER}}_$GITHUB_RUN_ID bumping-version/${{steps.variables.outputs.VERSION_NUMBER}}_$GITHUB_RUN_ID
+
+      # - name: Generate Docker requirements
+      #  run: |
+      #    source env/bin/activate
+      #    pip install -r requirements.txt
+      #    pip freeze -l > docker/requirements/requirements.txt
+      #    git status
+
+      - name: Bump version
+        run: |
+          source env/bin/activate
+          pip install -r dev-requirements.txt
+          env/bin/bumpversion --allow-dirty --new-version ${{steps.variables.outputs.VERSION_NUMBER}} major
+          git status
+
+      - name: Commit version bump directly
+        uses: EndBug/add-and-commit@v7
+        if: ${{ steps.variables.outputs.IS_DRY_RUN == 'false' }}
+        with:
+          author_name: 'Github Build Bot'
+          author_email: 'buildbot@fishtownanalytics.com'
+          message: 'Bumping version to ${{steps.variables.outputs.VERSION_NUMBER}}'
+
+      - name: Commit version bump to branch
+        uses: EndBug/add-and-commit@v7
+        if: ${{ steps.variables.outputs.IS_DRY_RUN == 'true' }}
+        with:
+          author_name: 'Github Build Bot'
+          author_email: 'buildbot@fishtownanalytics.com'
+          message: 'Bumping version to ${{steps.variables.outputs.VERSION_NUMBER}}'
+          branch: 'bumping-version/${{steps.variables.outputs.VERSION_NUMBER}}_${{GITHUB.RUN_ID}}'
+          push: 'origin origin/bumping-version/${{steps.variables.outputs.VERSION_NUMBER}}_${{GITHUB.RUN_ID}}'
+
+      - name: Create Pull Request
+        uses: peter-evans/create-pull-request@v3
+        if: ${{ steps.variables.outputs.IS_DRY_RUN == 'true' }}
+        with:
+          author: 'Github Build Bot <buildbot@fishtownanalytics.com>'
+          draft: true
+          base: ${{github.ref}}
+          title: 'Bumping version to ${{steps.variables.outputs.VERSION_NUMBER}}'
+          branch: 'bumping-version/${{steps.variables.outputs.VERSION_NUMBER}}_${{GITHUB.RUN_ID}}'

.gitignore

@@ -8,7 +8,8 @@ __pycache__/
 
 # Distribution / packaging
 .Python
-env/
+env*/
+dbt_env/
 build/
 develop-eggs/
 dist/
@@ -23,6 +24,7 @@ var/
 *.egg-info/
 .installed.cfg
 *.egg
+*.mypy_cache/
 logs/
 
 # PyInstaller
@@ -41,11 +43,14 @@ htmlcov/
 .coverage
 .coverage.*
 .cache
+.env
 nosetests.xml
 coverage.xml
 *,cover
 .hypothesis/
 test.env
+*.pytest_cache/
+
 
 # Translations
 *.mo
@@ -60,10 +65,10 @@ docs/_build/
 # PyBuilder
 target/
 
-#Ipython Notebook
+# Ipython Notebook
 .ipynb_checkpoints
 
-#Emacs
+# Emacs
 *~
 
 # Sublime Text
@@ -72,7 +77,21 @@ target/
 # Vim
 *.sw*
 
+# Pyenv
 .python-version
 
 # Vim
 *.sw*
+
+# pycharm
+.idea/
+venv/
+
+# AWS credentials
+.aws/
+
+# MacOS
+.DS_Store
+
+# vscode
+.vscode/

.pre-commit-config.yaml

@@ -0,0 +1,68 @@
+# Configuration for pre-commit hooks (see https://pre-commit.com/).
+# Eventually the hooks described here will be run as tests before merging each PR.
+
+# TODO: remove global exclusion of tests when testing overhaul is complete
+exclude: ^test/
+
+# Force all unspecified python hooks to run python 3.8
+default_language_version:
+  python: python3.8
+
+repos:
+- repo: https://github.com/pre-commit/pre-commit-hooks
+  rev: v3.2.0
+  hooks:
+  - id: check-yaml
+    args: [--unsafe]
+  - id: check-json
+  - id: end-of-file-fixer
+  - id: trailing-whitespace
+    exclude_types:
+      - "markdown"
+  - id: check-case-conflict
+- repo: https://github.com/psf/black
+  rev: 22.3.0
+  hooks:
+  - id: black
+    args:
+    - "--line-length=99"
+    - "--target-version=py38"
+  - id: black
+    alias: black-check
+    stages: [manual]
+    args:
+    - "--line-length=99"
+    - "--target-version=py38"
+    - "--check"
+    - "--diff"
+- repo: https://gitlab.com/pycqa/flake8
+  rev: 4.0.1
+  hooks:
+  - id: flake8
+  - id: flake8
+    alias: flake8-check
+    stages: [manual]
+- repo: https://github.com/pre-commit/mirrors-mypy
+  rev: v0.782
+  hooks:
+  - id: mypy
+    # N.B.: Mypy is... a bit fragile.
+    #
+    # By using `language: system` we run this hook in the local
+    # environment instead of a pre-commit isolated one.  This is needed
+    # to ensure mypy correctly parses the project.
+
+    # It may cause trouble
+    # in that it adds environmental variables out of our control to the
+    # mix.  Unfortunately, there's nothing we can do about per pre-commit's
+    # author.
+    # See https://github.com/pre-commit/pre-commit/issues/730 for details.
+    args: [--show-error-codes]
+    files: ^core/dbt/
+    language: system
+  - id: mypy
+    alias: mypy-check
+    stages: [manual]
+    args: [--show-error-codes, --pretty]
+    files: ^core/dbt/
+    language: system

ARCHITECTURE.md

@@ -0,0 +1,54 @@
+The core function of dbt is SQL compilation and execution. Users create projects of dbt resources (models, tests, seeds, snapshots, ...), defined in SQL and YAML files, and they invoke dbt to create, update, or query associated views and tables. Today, dbt makes heavy use of Jinja2 to enable the templating of SQL, and to construct a DAG (Directed Acyclic Graph) from all of the resources in a project. Users can also extend their projects by installing resources (including Jinja macros) from other projects, called "packages."
+
+## dbt-core
+
+Most of the python code in the repository is within the `core/dbt` directory.
+- [`single python files`](core/dbt/README.md): A number of individual files, such as 'compilation.py' and 'exceptions.py'
+
+The main subdirectories of core/dbt:
+- [`adapters`](core/dbt/adapters/README.md): Define base classes for behavior that is likely to differ across databases
+- [`clients`](core/dbt/clients/README.md): Interface with dependencies (agate, jinja) or across operating systems
+- [`config`](core/dbt/config/README.md): Reconcile user-supplied configuration from connection profiles, project files, and Jinja macros
+- [`context`](core/dbt/context/README.md): Build and expose dbt-specific Jinja functionality
+- [`contracts`](core/dbt/contracts/README.md): Define Python objects (dataclasses) that dbt expects to create and validate
+- [`deps`](core/dbt/deps/README.md): Package installation and dependency resolution
+- [`events`](core/dbt/events/README.md): Logging events
+- [`graph`](core/dbt/graph/README.md): Produce a `networkx` DAG of project resources, and selecting those resources given user-supplied criteria
+- [`include`](core/dbt/include/README.md): The dbt "global project," which defines default implementations of Jinja2 macros
+- [`parser`](core/dbt/parser/README.md): Read project files, validate, construct python objects
+- [`task`](core/dbt/task/README.md): Set forth the actions that dbt can perform when invoked
+
+Legacy tests are found in the 'test' directory:
+- [`unit tests`](core/dbt/test/unit/README.md): Unit tests
+- [`integration tests`](core/dbt/test/integration/README.md): Integration tests
+
+### Invoking dbt
+
+The "tasks" map to top-level dbt commands. So `dbt run` => task.run.RunTask, etc. Some are more like abstract base classes (GraphRunnableTask, for example) but all the concrete types outside of task should map to tasks. Currently one executes at a time. The tasks kick off their “Runners” and those do execute in parallel. The parallelism is managed via a thread pool, in GraphRunnableTask.
+
+core/dbt/include/index.html
+This is the docs website code. It comes from the dbt-docs repository, and is generated when a release is packaged.
+
+## Adapters
+
+dbt uses an adapter-plugin pattern to extend support to different databases, warehouses, query engines, etc. For testing and development purposes, the dbt-postgres plugin lives alongside the dbt-core codebase, in the [`plugins`](plugins) subdirectory. Like other adapter plugins, it is a self-contained codebase and package that builds on top of dbt-core.
+
+Each adapter is a mix of python, Jinja2, and SQL. The adapter code also makes heavy use of Jinja2 to wrap modular chunks of SQL functionality, define default implementations, and allow plugins to override it.
+
+Each adapter plugin is a standalone python package that includes:
+
+- `dbt/include/[name]`: A "sub-global" dbt project, of YAML and SQL files, that reimplements Jinja macros to use the adapter's supported SQL syntax
+- `dbt/adapters/[name]`: Python modules that inherit, and optionally reimplement, the base adapter classes defined in dbt-core
+- `setup.py`
+
+The Postgres adapter code is the most central, and many of its implementations are used as the default defined in the dbt-core global project. The greater the distance of a data technology from Postgres, the more its adapter plugin may need to reimplement.
+
+## Testing dbt
+
+The [`test/`](test/) subdirectory includes unit and integration tests that run as continuous integration checks against open pull requests. Unit tests check mock inputs and outputs of specific python functions. Integration tests perform end-to-end dbt invocations against real adapters (Postgres, Redshift, Snowflake, BigQuery) and assert that the results match expectations. See [the contributing guide](CONTRIBUTING.md) for a step-by-step walkthrough of setting up a local development and testing environment.
+
+## Everything else
+
+- [docker](docker/): All dbt versions are published as Docker images on DockerHub. This subfolder contains the `Dockerfile` (constant) and `requirements.txt` (one for each version).
+- [etc](etc/): Images for README
+- [scripts](scripts/): Helper scripts for testing, releasing, and producing JSON schemas. These are not included in distributions of dbt, nor are they rigorously tested—they're just handy tools for the dbt maintainers :)

CONTRIBUTING.md

@@ -1,320 +1,239 @@
-# Getting started with dbt
+# Contributing to `dbt`
+
+1. [About this document](#about-this-document)
+2. [Proposing a change](#proposing-a-change)
+3. [Getting the code](#getting-the-code)
+4. [Setting up an environment](#setting-up-an-environment)
+5. [Running `dbt` in development](#running-dbt-in-development)
+6. [Testing](#testing)
+7. [Submitting a Pull Request](#submitting-a-pull-request)
 
 ## About this document
 
-This is intended as a developer's guide to modifying and using dbt. It is not intended as a guide for end users of dbt (though if it is helpful, that's great!) and assumes a certain level of familiarity with Python concepts such as virtualenvs, `pip`, module/filesystem layouts, etc. It also assumes you are using macOS or Linux and are comfortable with the command line.
+This document is a guide intended for folks interested in contributing to `dbt-core`. Below, we document the process by which members of the community should create issues and submit pull requests (PRs) in this repository. It is not intended as a guide for using `dbt-core`, and it assumes a certain level of familiarity with Python concepts such as virtualenvs, `pip`, python modules, filesystems, and so on. This guide assumes you are using macOS or Linux and are comfortable with the command line.
+
+If you're new to python development or contributing to open-source software, we encourage you to read this document from start to finish. If you get stuck, drop us a line in the `#dbt-core-development` channel on [slack](https://community.getdbt.com).
+
+#### Adapters
+
+If you have an issue or code change suggestion related to a specific database [adapter](https://docs.getdbt.com/docs/available-adapters); please refer to that supported databases seperate repo for those contributions.
+
+### Signing the CLA
+
+Please note that all contributors to `dbt-core` must sign the [Contributor License Agreement](https://docs.getdbt.com/docs/contributor-license-agreements) to have their Pull Request merged into the `dbt-core` codebase. If you are unable to sign the CLA, then the `dbt-core` maintainers will unfortunately be unable to merge your Pull Request. You are, however, welcome to open issues and comment on existing ones.
+
+## Proposing a change
+
+`dbt-core` is Apache 2.0-licensed open source software. `dbt-core` is what it is today because community members like you have opened issues, provided feedback, and contributed to the knowledge loop for the entire communtiy. Whether you are a seasoned open source contributor or a first-time committer, we welcome and encourage you to contribute code, documentation, ideas, or problem statements to this project.
+
+### Defining the problem
+
+If you have an idea for a new feature or if you've discovered a bug in `dbt-core`, the first step is to open an issue. Please check the list of [open issues](https://github.com/dbt-labs/dbt-core/issues) before creating a new one. If you find a relevant issue, please add a comment to the open issue instead of creating a new one. There are hundreds of open issues in this repository and it can be hard to know where to look for a relevant open issue. **The `dbt-core` maintainers are always happy to point contributors in the right direction**, so please err on the side of documenting your idea in a new issue if you are unsure where a problem statement belongs.
+
+> **Note:** All community-contributed Pull Requests _must_ be associated with an open issue. If you submit a Pull Request that does not pertain to an open issue, you will be asked to create an issue describing the problem before the Pull Request can be reviewed.
+
+### Discussing the idea
+
+After you open an issue, a `dbt-core` maintainer will follow up by commenting on your issue (usually within 1-3 days) to explore your idea further and advise on how to implement the suggested changes. In many cases, community members will chime in with their own thoughts on the problem statement. If you as the issue creator are interested in submitting a Pull Request to address the issue, you should indicate this in the body of the issue. The `dbt-core` maintainers are _always_ happy to help contributors with the implementation of fixes and features, so please also indicate if there's anything you're unsure about or could use guidance around in the issue.
+
+### Submitting a change
+
+If an issue is appropriately well scoped and describes a beneficial change to the `dbt-core` codebase, then anyone may submit a Pull Request to implement the functionality described in the issue. See the sections below on how to do this.
+
+The `dbt-core` maintainers will add a `good first issue` label if an issue is suitable for a first-time contributor. This label often means that the required code change is small, limited to one database adapter, or a net-new addition that does not impact existing functionality. You can see the list of currently open issues on the [Contribute](https://github.com/dbt-labs/dbt-core/contribute) page.
+
+Here's a good workflow:
+- Comment on the open issue, expressing your interest in contributing the required code change
+- Outline your planned implementation. If you want help getting started, ask!
+- Follow the steps outlined below to develop locally. Once you have opened a PR, one of the `dbt-core` maintainers will work with you to review your code.
+- Add a test! Tests are crucial for both fixes and new features alike. We want to make sure that code works as intended, and that it avoids any bugs  previously encountered. Currently, the best resource for understanding `dbt-core`'s [unit](test/unit) and [integration](test/integration) tests is the tests themselves. One of the maintainers can help by pointing out relevant examples.
+- Check your formatting and linting with [Flake8](https://flake8.pycqa.org/en/latest/#), [Black](https://github.com/psf/black), and the rest of the hooks we have in our [pre-commit](https://pre-commit.com/) [config](https://github.com/dbt-labs/dbt-core/blob/75201be9db1cb2c6c01fa7e71a314f5e5beb060a/.pre-commit-config.yaml).
+
+In some cases, the right resolution to an open issue might be tangential to the `dbt-core` codebase. The right path forward might be a documentation update or a change that can be made in user-space. In other cases, the issue might describe functionality that the `dbt-core` maintainers are unwilling or unable to incorporate into the `dbt-core` codebase. When it is determined that an open issue describes functionality that will not translate to a code change in the `dbt-core` repository, the issue will be tagged with the `wontfix` label (see below) and closed.
+
+### Using issue labels
+
+The `dbt-core` maintainers use labels to categorize open issues. Most labels describe the domain in the `dbt-core` codebase germane to the discussion.
+
+| tag | description |
+| --- | ----------- |
+| [triage](https://github.com/dbt-labs/dbt-core/labels/triage) | This is a new issue which has not yet been reviewed by a `dbt-core` maintainer. This label is removed when a maintainer reviews and responds to the issue. |
+| [bug](https://github.com/dbt-labs/dbt-core/labels/bug) | This issue represents a defect or regression in `dbt-core` |
+| [enhancement](https://github.com/dbt-labs/dbt-core/labels/enhancement) | This issue represents net-new functionality in `dbt-core` |
+| [good first issue](https://github.com/dbt-labs/dbt-core/labels/good%20first%20issue) | This issue does not require deep knowledge of the `dbt-core` codebase to implement. This issue is appropriate for a first-time contributor. |
+| [help wanted](https://github.com/dbt-labs/dbt-core/labels/help%20wanted) / [discussion](https://github.com/dbt-labs/dbt-core/labels/discussion) | Conversation around this issue in ongoing, and there isn't yet a clear path forward. Input from community members is most welcome. |
+| [duplicate](https://github.com/dbt-labs/dbt-core/issues/duplicate) | This issue is functionally identical to another open issue. The `dbt-core` maintainers will close this issue and encourage community members to focus conversation on the other one. |
+| [snoozed](https://github.com/dbt-labs/dbt-core/labels/snoozed) | This issue describes a good idea, but one which will probably not be addressed in a six-month time horizon. The `dbt-core` maintainers will revist these issues periodically and re-prioritize them accordingly. |
+| [stale](https://github.com/dbt-labs/dbt-core/labels/stale) | This is an old issue which has not recently been updated. Stale issues will periodically be closed by `dbt-core` maintainers, but they can be re-opened if the discussion is restarted. |
+| [wontfix](https://github.com/dbt-labs/dbt-core/labels/wontfix) | This issue does not require a code change in the `dbt-core` repository, or the maintainers are unwilling/unable to merge a Pull Request which implements the behavior described in the issue. |
+
+#### Branching Strategy
+
+`dbt-core` has three types of branches:
+
+- **Trunks** are where active development of the next release takes place. There is one trunk named `main` at the time of writing this, and will be the default branch of the repository.
+- **Release Branches** track a specific, not yet complete release of `dbt-core`. Each minor version release has a corresponding release branch. For example, the `0.11.x` series of releases has a branch called `0.11.latest`. This allows us to release new patch versions under `0.11` without necessarily needing to pull them into the latest version of `dbt-core`.
+- **Feature Branches** track individual features and fixes. On completion they should be merged into the trunk branch or a specific release branch.
+
+## Getting the code
+
+### Installing git
+
+You will need `git` in order to download and modify the `dbt-core` source code. On macOS, the best way to download git is to just install [Xcode](https://developer.apple.com/support/xcode/).
+
+### External contributors
+
+If you are not a member of the `dbt-labs` GitHub organization, you can contribute to `dbt-core` by forking the `dbt-core` repository. For a detailed overview on forking, check out the [GitHub docs on forking](https://help.github.com/en/articles/fork-a-repo). In short, you will need to:
+
+1. fork the `dbt-core` repository
+2. clone your fork locally
+3. check out a new branch for your proposed changes
+4. push changes to your fork
+5. open a pull request against `dbt-labs/dbt` from your forked repository
+
+### dbt Labs contributors
+
+If you are a member of the `dbt-labs` GitHub organization, you will have push access to the `dbt-core` repo. Rather than forking `dbt-core` to make your changes, just clone the repository, check out a new branch, and push directly to that branch.
 
 ## Setting up an environment
 
-Before you can develop dbt effectively, you should set up the following:
-
-### pyenv
-
-We strongly recommend setting up [pyenv](https://github.com/pyenv/pyenv) and its [pyenv-virtualenv](https://github.com/pyenv/pyenv-virtualenv) plugin. This setup will make it much easier for you to manage multiple Python projects in the medium to long term.
-
-### python
-
-By default, `pyenv` has only one python version installed and it's the `system` python - the one that comes with your OS. You don't want that. Instead, use `pyenv install 3.6.5` to install a more recent version. dbt supports up to Python 3.6 at the time of writing (and will soon support Python 3.7)
-
-To get a full (very long!) list of versions available, you can do `pyenv install -l` and look for the versions defined by numbers alone - the others are variants of Python and outside the scope of this document.
-
-### docker and docker-compose
-
-Docker and docker-compose are both used in testing. For macOS, the easiest thing to do is to go [here](https://store.docker.com/editions/community/docker-ce-desktop-mac) and download it. You'll need to make an account. On Linux, if you can use one of the packages [here](https://docs.docker.com/install/#server). We recommend installing from docker.com instead of from your package manager. On Linux you also have to install docker-compose separately, follow [these instructions](https://docs.docker.com/compose/install/#install-compose).
-
-### git
-
-You will also need `git` in order to get dbt and contribute code. On macOS, the best way to get that is to just install Xcode.
-
-### GitHub
-
-You will need a GitHub account fully configured with SSH to contribute to dbt. GitHub has [an excellent guide on how to set up SSH](https://help.github.com/articles/connecting-to-github-with-ssh/) -- we strongly recommend you follow their guide if you are unfamiliar with SSH.
-
-### Getting dbt
-
-Now clone dbt to wherever you'd like. For example:
-
-```
-mkdir -p ~/git/
-cd ~/git
-git clone git@github.com:fishtown-analytics/dbt.git
-```
-
-But it really does not matter where you put it as long as you remember it.
-
-### Setting up your virtualenv
-
-Set up a fresh virtualenv with pyenv-virtualenv for dbt:
-
-```
-pyenv virtualenv 3.6.5 dbt36
-cd ~/git/dbt
-pyenv local dbt36
-```
-
-This makes a new virtualenv based on python 3.6.5 named `dbt36`, and tells pyenv that when you're in the `dbt` directory it should automatically use that virtualenv.
-
-
-### Installing postgres locally
-
-For testing, and later in the examples in this document, you may want to have `psql` available so you can poke around in the database and see what happened. We recommend that you use [homebrew](https://brew.sh/) for that on macOS, and your package manager on Linux. You can install any version of the postgres client that you'd like. So on macOS, with homebrew setup:
-
-```
-brew install postgresql
-```
-
-## Testing
-
-Getting the dbt integration tests set up in your local environment will be very helpful as you start to make changes to your local version of dbt. The section that follows outlines some helpful tips for setting up the test environment.
+There are some tools that will be helpful to you in developing locally. While this is the list relevant for `dbt-core` development, many of these tools are used commonly across open-source python projects.
 
 ### Tools
 
-A short list of tools used in dbt testing that will be helpful to your understanding:
+A short list of tools used in `dbt-core` testing that will be helpful to your understanding:
 
-- [virtualenv](https://virtualenv.pypa.io/en/stable/) to manage dependencies and stuff
-- [tox](https://tox.readthedocs.io/en/latest/) to manage virtualenvs across python versions
-- [nosetests](http://nose.readthedocs.io/en/latest) to discover/run tests
-- [make](https://users.cs.duke.edu/~ola/courses/programming/Makefiles/Makefiles.html) - but don't worry too much, nobody _really_ understands how make works and our Makefile is super simple
-- [pep8](https://pep8.readthedocs.io/en/release-1.7.x/) for code linting
-- [CircleCI](https://circleci.com/product/) and [Appveyor](https://www.appveyor.com/docs/)
+- [`tox`](https://tox.readthedocs.io/en/latest/) to manage virtualenvs across python versions. We currently target the latest patch releases for Python 3.7, Python 3.8, Python 3.9, and Python 3.10
+- [`pytest`](https://docs.pytest.org/en/latest/) to discover/run tests
+- [`make`](https://users.cs.duke.edu/~ola/courses/programming/Makefiles/Makefiles.html) - but don't worry too much, nobody _really_ understands how make works and our Makefile is super simple
+- [`flake8`](https://flake8.pycqa.org/en/latest/) for code linting
+- [`black`](https://github.com/psf/black) for code formatting
+- [`mypy`](https://mypy.readthedocs.io/en/stable/) for static type checking
+- [Github Actions](https://github.com/features/actions)
 
-If you're unfamiliar with any or all of these, that's fine! You really do not have to have a deep understanding of any of these to get by.
+A deep understanding of these tools in not required to effectively contribute to `dbt-core`, but we recommend checking out the attached documentation if you're interested in learning more about them.
 
-Our test environment goes like this:
+#### virtual environments
 
-    - CircleCI and Appveyor run `tox`
-    - `make test` runs `docker-compose`
-    - `docker-compose` runs `tox`
-    - `tox` sets up virtualenvs for each distinct set of tests and runs `nosetests`
-    - `nosetests` finds all the appropriate tests and runs them
-
-### Running tests via Docker
-
-The basics should work with basically no further setup. In the terminal, `cd` to the directory where you cloned dbt. So, for example, if you cloned dbt to `~/git/dbt`:
-
-```
-cd ~/git/dbt
+We strongly recommend using virtual environments when developing code in `dbt-core`. We recommend creating this virtualenv
+in the root of the `dbt-core` repository. To create a new virtualenv, run:
+```sh
+python3 -m venv env
+source env/bin/activate
 ```
 
-Then you'll want to make a test.env file. Fortunately, there's a sample which is fine for our purposes:
+This will create and activate a new Python virtual environment.
 
-```
-cp test.env.sample test.env
+#### docker and docker-compose
+
+Docker and docker-compose are both used in testing. Specific instructions for you OS can be found [here](https://docs.docker.com/get-docker/).
+
+
+#### postgres (optional)
+
+For testing, and later in the examples in this document, you may want to have `psql` available so you can poke around in the database and see what happened. We recommend that you use [homebrew](https://brew.sh/) for that on macOS, and your package manager on Linux. You can install any version of the postgres client that you'd like. On macOS, with homebrew setup, you can run:
+
+```sh
+brew install postgresql
 ```
 
-If you want to test snowflake/bigquery/redshift locally you'll need to get credentials and add them to this file. But, to start, you can just focus on postgres tests. They have the best coverage, are the fastest, and are the easiest to set up.
+## Running `dbt-core` in development
 
-To run the unit tests, use `make test-unit` - it will run the unit tests on python 2.7 and 3.6, and a pep8 linter.
+### Installation
 
-To run the postgres+python 3.6 integration tests, you'll have to do one extra step of setting up the database:
+First make sure that you set up your `virtualenv` as described in [Setting up an environment](#setting-up-an-environment).  Also ensure you have the latest version of pip installed with `pip install --upgrade pip`. Next, install `dbt-core` (and its dependencies) with:
 
+```sh
+make dev
+# or
+pip install -r dev-requirements.txt -r editable-requirements.txt
 ```
+
+When `dbt-core` is installed this way, any changes you make to the `dbt-core` source code will be reflected immediately in your next `dbt-core` run.
+
+
+### Running `dbt-core`
+
+With your virtualenv activated, the `dbt-core` script should point back to the source code you've cloned on your machine. You can verify this by running `which dbt`. This command should show you a path to an executable in your virtualenv.
+
+Configure your [profile](https://docs.getdbt.com/docs/configure-your-profile) as necessary to connect to your target databases. It may be a good idea to add a new profile pointing to a local postgres instance, or a specific test sandbox within your data warehouse if appropriate.
+
+## Testing
+
+Getting the `dbt-core` integration tests set up in your local environment will be very helpful as you start to make changes to your local version of `dbt-core`. The section that follows outlines some helpful tips for setting up the test environment.
+
+Although `dbt-core` works with a number of different databases, you won't need to supply credentials for every one of these databases in your test environment. Instead you can test all dbt-core code changes with Python and Postgres.
+
+### Initial setup
+
+We recommend starting with `dbt-core`'s Postgres tests. These tests cover most of the functionality in `dbt-core`, are the fastest to run, and are the easiest to set up. To run the Postgres integration tests, you'll have to do one extra step of setting up the test database:
+
+```sh
+make setup-db
+```
+or, alternatively:
+```sh
 docker-compose up -d database
 PGHOST=localhost PGUSER=root PGPASSWORD=password PGDATABASE=postgres bash test/setup_db.sh
 ```
 
-And then to actually run them, you can do `make test-quick`.
+### Test commands
 
-If you want to see what exactly is getting run on these commands, look at the `Makefile`. Note that the commands start with an `@` which you can ignore, just makefile magic. If you want to see what the involved `tox` commands are using, look at the corresponding `tox.ini` section - hopefully it's pretty self-explanatory.
+There are a few methods for running tests locally.
 
-### Running tests in CI
+#### Makefile
 
-When a contributor to dbt pushes code, GitHub will trigger a series of CI builds on CircleCI and Appveyor (Windows) to test all of dbt's code. The CI builds trigger all the integration tests, not just postgres+python3.6.
-
-The Snowflake tests take a very long time to run (about an hour), so don't just sit around waiting, it'll be a while!
-
-If you open a PR as a non-contributor, these tests won't run automatically. Someone from the dbt team will reach out to you and get them running after reviewing your code.
-
-## Running dbt locally
-
-Sometimes, you're going to have to pretend to be an end user to reproduce bugs and stuff. So that means manually setting up some stuff that the test harness takes care of for you.
-
-### installation
-
-First, from the `dbt` directory, install dbt in 'editable' mode. There are a couple ways to do it, but I'm in the habit of `pip install -e .`, which tells pip to install the package in the current directory in "editable" mode. What's cool about this mode is any changes you make to the current dbt directory will be reflected immediately in your next `dbt` run.
-
-### Profile
-
-Now you'll also need a 'dbt profile' so dbt can tell how to connect to your database. By default, this file belongs at `~/.dbt/profiles.yml`, so `mkdir ~/.dbt` and then open your favorite text editor and write out something like this to `~/.dbt/profiles.yml`:
+There are multiple targets in the Makefile to run common test suites and code
+checks, most notably:
 
+```sh
+# Runs unit tests with py38 and code checks in parallel.
+make test
+# Runs postgres integration tests with py38 in "fail fast" mode.
+make integration
 ```
-config:
-    send_anonymous_usage_stats: False
-    use_colors: True
+> These make targets assume you have a local install of a recent version of [`tox`](https://tox.readthedocs.io/en/latest/) for unit/integration testing and pre-commit for code quality checks,
+> unless you use choose a Docker container to run tests. Run `make help` for more info.
 
-talk:
-    outputs:
-        default:
-            type: postgres
-            threads: 4
-            host: localhost
-            port: 5432
-            user: root
-            pass: password
-            dbname: postgres
-            schema: dbt_postgres
-    target: default
+Check out the other targets in the Makefile to see other commonly used test
+suites.
+
+#### `pre-commit`
+[`pre-commit`](https.pre-commit.com) takes care of running all code-checks for formatting and linting. Run `make dev` to install `pre-commit` in your local environment.  Once this is done you can use any of the linter-based make targets as well as a git pre-commit hook that will ensure proper formatting and linting.
+
+#### `tox`
+
+[`tox`](https://tox.readthedocs.io/en/latest/) takes care of managing virtualenvs and install dependencies in order to run tests. You can also run tests in parallel, for example, you can run unit tests for Python 3.7, Python 3.8, Python 3.9, and Python 3.10 checks in parallel with `tox -p`. Also, you can run unit tests for specific python versions with `tox -e py37`. The configuration for these tests in located in `tox.ini`.
+
+#### `pytest`
+
+Finally, you can also run a specific test or group of tests using [`pytest`](https://docs.pytest.org/en/latest/) directly. With a virtualenv
+active and dev dependencies installed you can do things like:
+```sh
+# run specific postgres integration tests
+python -m pytest -m profile_postgres test/integration/001_simple_copy_test
+# run all unit tests in a file
+python -m pytest test/unit/test_graph.py
+# run a specific unit test
+python -m pytest test/unit/test_graph.py::GraphTest::test__dependency_list
 ```
+> [Here](https://docs.pytest.org/en/reorganize-docs/new-docs/user/commandlineuseful.html)
+> is a list of useful command-line options for `pytest` to use while developing.
 
-There's a sample you can look at in the `dbt` folder (`sample.profiles.yml`) but it's got a lot of extra and as a developer, you really probably only want to test against your local postgres container. The basic idea is that there are multiple 'profiles' (`talk`, in this case) and within those each profile has one or more 'targets' (`default`, in this case), and each profile has a default target. You can specify what profile you want to use with the `--profile` flag, and which target with the `--target` flag. If you want to be really snazzy, dbt project files actually specify their target, and if you match up your dbt project `profile` key with your `profiles.yml` profile names you don't have to use `--profile` (and if you like your profile's default target, no need for `--target` either).
+## Adding CHANGELOG Entry
 
-## Example
+We use [changie](https://changie.dev) to generate `CHANGELOG` entries.  Do not edit the `CHANGELOG.md` directly.  Your modifications will be lost.
 
-There is a very simple project that is a very nice example of dbt's capabilities, you can get it from github:
+Follow the steps to [install `changie`](https://changie.dev/guide/installation/) for your system.
 
-```
-cd ~/src/fishtown
-git clone git@github.com:fishtown-analytics/talk.git
-git checkout use-postgres
-```
+Once changie is installed and your PR is created, simply run `changie new` and changie will walk you through the process of creating a changelog entry.  Commit the file that's created and your changelog entry is complete!
 
-The `use-postgres` branch configures the project to use your local postgres (instead of the default, Snowflake). You should poke around in this project a bit, particularly the `models` directory.
+## Submitting a Pull Request
 
-Before doing anything, let's check the database out:
+dbt Labs provides a CI environment to test changes to specific adapters, and periodic maintenance checks of `dbt-core` through Github Actions. For example, if you submit a pull request to the `dbt-redshift` repo, GitHub will trigger automated code checks and tests against Redshift.
 
-```
-> PGHOST=localhost PGUSER=root PGPASSWORD=password PGDATABASE=postgres psql
-psql (10.4)
-Type "help" for help.
-
-postgres=# \dn
-  List of schemas
-  Name  |  Owner
---------+----------
- public | postgres
-(1 row)
-
-postgres=# \q
-```
-
-`\dn` lists schemas in postgres. You can see that we just have the default "public" schema, so we haven't done anything yet.
+A `dbt-core` maintainer will review your PR. They may suggest code revision for style or clarity, or request that you add unit or integration test(s). These are good things! We believe that, with a little bit of help, anyone can contribute high-quality code.
+- First time contributors should note code checks + unit tests require a maintainer to approve.
 
 
-If you compile your model with `dbt compile` you should see something like this:
-
-```
-> dbt compile
-Found 2 models, 0 tests, 0 archives, 0 analyses, 59 macros, 1 operations, 1 seed files
-
-09:49:57 | Concurrency: 2 threads (target='default')
-09:49:57 |
-09:49:57 | Done.
-```
-
-So what does that mean? Well:
-
-- `2 models` refers to the contents of the `models` directory
-- `59 macros` are the builtin global macros defind by dbt itself
-- `1 operations` is the catalog generation operation that runs by default
-- `1 seed files` refers to the seed data in `data/moby_dick.csv`
-
-It will create two new folders: One named `dbt_modules`, which is empty for this case, and one named `target`, which has a few things in it:
-
-- A folder named `compiled`, created by dbt looking at your models and your database schema and filling in references (so `models/moby_dick_base.sql` becomes `target/compiled/talk/moby_dick_base.sql` by replacing the `from {{ ref('moby_dick') }}` with `from "dbt_postgres".moby_dick`)
-- A file named `graph.gpickle`, which is your project's dependency/reference graph as understood by the `networkx` library.
-- A file named `catalog.json`, which is the data dbt has collected about your project (macros used, models/seeds used, and parent/child reference maps)
-
-
-Next, load the seed file into the database with `dbt seed`, it'll look like this:
-
-```
-> dbt seed
-Found 2 models, 0 tests, 0 archives, 0 analyses, 59 macros, 1 operations, 1 seed files
-
-10:40:46 | Concurrency: 2 threads (target='default')
-10:40:46 |
-10:40:46 | 1 of 1 START seed file dbt_postgres.moby_dick........................ [RUN]
-10:40:47 | 1 of 1 OK loaded seed file dbt_postgres.moby_dick.................... [INSERT 17774 in 0.44s]
-10:40:47 |
-10:40:47 | Finished running 1 seeds in 0.65s.
-
-Completed successfully
-```
-
-If you go into postgres now, you can see that you have a new schema ('dbt_postgres'), a new table in that schema ('moby_dick'), and a bunch of stuff in that table:
-
-```
-> PGHOST=localhost PGUSER=root PGPASSWORD=password PGDATABASE=postgres psql
-psql (10.4)
-Type "help" for help.
-
-postgres=# \dn
-     List of schemas
-     Name     |  Owner
---------------+----------
- dbt_postgres | root
- public       | postgres
-(2 rows)
-
-postgres=# \dt dbt_postgres.*
-            List of relations
-    Schema    |   Name    | Type  | Owner
---------------+-----------+-------+-------
- dbt_postgres | moby_dick | table | root
-(1 row)
-
-postgres=# select count(*) from dbt_postgres.moby_dick;
- count
--------
- 17774
-(1 row)
-
-postgres=# \q
-```
-
-If you run `dbt run` now, you'll see something like this:
-
-```
-> dbt run
-Found 2 models, 0 tests, 0 archives, 0 analyses, 59 macros, 1 operations, 1 seed files
-
-10:19:41 | Concurrency: 2 threads (target='default')
-10:19:41 |
-10:19:41 | 1 of 2 START view model dbt_postgres.moby_dick_base.................. [RUN]
-10:19:41 | 1 of 2 OK created view model dbt_postgres.moby_dick_base............. [CREATE VIEW in 0.05s]
-10:19:41 | 2 of 2 START table model dbt_postgres.word_count..................... [RUN]
-10:19:42 | 2 of 2 OK created table model dbt_postgres.word_count................ [SELECT 27390 in 0.19s]
-10:19:42 |
-10:19:42 | Finished running 1 view models, 1 table models in 0.53s.
-
-Completed successfully
-
-Done. PASS=2 ERROR=0 SKIP=0 TOTAL=2
-```
-
-So, some of the same information and then you can see that dbt created a view (`moby_dick_base`) and a table (`word_count`). If you go into postgres, you'll be able to see that!
-
-If you want to inspect the result, you can do so via psql:
-
-```
-> PGHOST=localhost PGUSER=root PGPASSWORD=password PGDATABASE=postgres psql
-psql (10.4)
-Type "help" for help.
-
-postgres=# \dt dbt_postgres.*
-             List of relations
-    Schema    |    Name    | Type  | Owner
---------------+------------+-------+-------
- dbt_postgres | moby_dick  | table | root
- dbt_postgres | word_count | table | root
-(2 rows)
-
-postgres=# select * from dbt_postgres.word_count order by ct desc limit 10;
- word |  ct
-------+-------
- the  | 13394
-      | 12077
- of   |  6368
- and  |  5846
- to   |  4382
- a    |  4377
- in   |  3767
- that |  2753
- his  |  2406
- I    |  1826
-(10 rows)
-```
-
-It's pretty much what you'd expect - the most common words are "the", "of", "and", etc. (The empty string probably should not be there, but this is just a toy example!)
-
-So what happened here? First, `dbt seed` loaded the data in the csv file into postgres. Then `dbt compile` built out a sort of plan for how everything is linked together by looking up references and macros and the current state of the database. And finally, `dbt run` ran the compiled SQL to generate the word_count table.
+Once all tests are passing and your PR has been approved, a `dbt-core` maintainer will merge your changes into the active development branch. And that's it! Happy developing :tada:

Dockerfile

@@ -1,14 +0,0 @@
-FROM python:3.6
-
-RUN apt-get update
-
-RUN apt-get install -y python-pip netcat
-RUN apt-get install -y python-dev python3-dev
-
-RUN pip install pip --upgrade
-RUN pip install virtualenv
-RUN pip install virtualenvwrapper
-RUN pip install tox
-
-WORKDIR /usr/src/app
-RUN cd /usr/src/app

Dockerfile.test

@@ -0,0 +1,83 @@
+##
+#  This dockerfile is used for local development and adapter testing only.
+#  See `/docker` for a generic and production-ready docker file
+##
+
+FROM ubuntu:20.04
+
+ENV DEBIAN_FRONTEND noninteractive
+
+RUN apt-get update \
+    && apt-get install -y --no-install-recommends \
+    software-properties-common \
+    && add-apt-repository ppa:git-core/ppa -y \
+    && apt-get dist-upgrade -y \
+    && apt-get install -y --no-install-recommends \
+    netcat \
+    postgresql \
+    curl \
+    git \
+    ssh \
+    software-properties-common \
+    make \
+    build-essential \
+    ca-certificates \
+    libpq-dev \
+    libsasl2-dev \
+    libsasl2-2 \
+    libsasl2-modules-gssapi-mit \
+    libyaml-dev \
+    unixodbc-dev \
+    && add-apt-repository ppa:deadsnakes/ppa \
+    && apt-get install -y \
+    python \
+    python-dev \
+    python3-pip \
+    python3.6 \
+    python3.6-dev \
+    python3-pip \
+    python3.6-venv \
+    python3.7 \
+    python3.7-dev \
+    python3.7-venv \
+    python3.8 \
+    python3.8-dev \
+    python3.8-venv \
+    python3.9 \
+    python3.9-dev \
+    python3.9-venv \
+    python3.10 \
+    python3.10-dev \
+    python3.10-venv \
+    && apt-get clean \
+    && rm -rf /var/lib/apt/lists/* /tmp/* /var/tmp/*
+
+ARG DOCKERIZE_VERSION=v0.6.1
+RUN curl -LO https://github.com/jwilder/dockerize/releases/download/$DOCKERIZE_VERSION/dockerize-linux-amd64-$DOCKERIZE_VERSION.tar.gz \
+    && tar -C /usr/local/bin -xzvf dockerize-linux-amd64-$DOCKERIZE_VERSION.tar.gz \
+    && rm dockerize-linux-amd64-$DOCKERIZE_VERSION.tar.gz
+
+RUN pip3 install -U tox wheel six setuptools
+
+# These args are passed in via docker-compose, which reads then from the .env file.
+# On Linux, run `make .env` to create the .env file for the current user.
+# On MacOS and Windows, these can stay unset.
+ARG USER_ID
+ARG GROUP_ID
+
+RUN if [ ${USER_ID:-0} -ne 0 ] && [ ${GROUP_ID:-0} -ne 0 ]; then \
+    groupadd -g ${GROUP_ID} dbt_test_user && \
+    useradd -m -l -u ${USER_ID} -g ${GROUP_ID} dbt_test_user; \
+    else \
+    useradd -mU -l dbt_test_user; \
+    fi
+RUN mkdir /usr/app && chown dbt_test_user /usr/app
+RUN mkdir /home/tox && chown dbt_test_user /home/tox
+
+WORKDIR /usr/app
+VOLUME /usr/app
+
+USER dbt_test_user
+
+ENV PYTHONIOENCODING=utf-8
+ENV LANG C.UTF-8

License.md

@@ -186,7 +186,7 @@
       same "printed page" as the copyright notice for easier
       identification within third-party archives.
 
-   Copyright {yyyy} {name of copyright owner}
+   Copyright 2021 dbt Labs, Inc.
 
    Licensed under the Apache License, Version 2.0 (the "License");
    you may not use this file except in compliance with the License.

MANIFEST.in

@@ -1 +0,0 @@
-recursive-include dbt/include *.py *.sql *.yml *.html *.md

Makefile

@@ -1,36 +1,103 @@
-.PHONY: install test test-unit test-integration
+.DEFAULT_GOAL:=help
 
-changed_tests := `git status --porcelain | grep '^\(M\| M\|A\| A\)' | awk '{ print $$2 }' | grep '\/test_[a-zA-Z_\-\.]\+.py'`
+# Optional flag to run target in a docker container.
+# (example `make test USE_DOCKER=true`)
+ifeq ($(USE_DOCKER),true)
+	DOCKER_CMD := docker-compose run --rm test
+endif
 
-install:
-	pip install -e .
+.PHONY: dev
+dev: ## Installs dbt-* packages in develop mode along with development dependencies.
+	@\
+	pip install -r dev-requirements.txt -r editable-requirements.txt && \
+	pre-commit install
 
-test:
-	@echo "Full test run starting..."
-	@time docker-compose run test tox
+.PHONY: mypy
+mypy: .env ## Runs mypy against staged changes for static type checking.
+	@\
+	$(DOCKER_CMD) pre-commit run --hook-stage manual mypy-check | grep -v "INFO"
 
-test-unit:
-	@echo "Unit test run starting..."
-	@time docker-compose run test tox -e unit-py27,unit-py36,pep8
+.PHONY: flake8
+flake8: .env ## Runs flake8 against staged changes to enforce style guide.
+	@\
+	$(DOCKER_CMD) pre-commit run --hook-stage manual flake8-check | grep -v "INFO"
 
-test-integration:
-	@echo "Integration test run starting..."
-	@time docker-compose run test tox -e integration-postgres-py27,integration-postgres-py36,integration-redshift-py27,integration-redshift-py36,integration-snowflake-py27,integration-snowflake-py36,integration-bigquery-py27,integration-bigquery-py36
+.PHONY: black
+black: .env ## Runs black  against staged changes to enforce style guide.
+	@\
+	$(DOCKER_CMD) pre-commit run --hook-stage manual black-check -v | grep -v "INFO"
 
-test-quick:
-	@echo "Integration test run starting..."
-	@time docker-compose run test tox -e integration-postgres-py36 -- -x
+.PHONY: lint
+lint: .env ## Runs flake8 and mypy code checks against staged changes.
+	@\
+	$(DOCKER_CMD) pre-commit run flake8-check --hook-stage manual | grep -v "INFO"; \
+	$(DOCKER_CMD) pre-commit run mypy-check --hook-stage manual | grep -v "INFO"
 
-clean:
-	rm -f .coverage
-	rm -rf .eggs/
-	rm -rf .tox/
-	rm -rf build/
-	rm -rf dbt.egg-info/
-	rm -f dbt_project.yml
-	rm -rf dist/
-	rm -f htmlcov/*.{css,html,js,json,png}
-	rm -rf logs/
-	rm -rf target/
-	find . -type f -name '*.pyc' -delete
-	find . -type d -name '__pycache__' -depth -delete
+.PHONY: unit
+unit: .env ## Runs unit tests with py38.
+	@\
+	$(DOCKER_CMD) tox -e py38
+
+.PHONY: test
+test: .env ## Runs unit tests with py38 and code checks against staged changes.
+	@\
+	$(DOCKER_CMD) tox -e py38; \
+	$(DOCKER_CMD) pre-commit run black-check --hook-stage manual | grep -v "INFO"; \
+	$(DOCKER_CMD) pre-commit run flake8-check --hook-stage manual | grep -v "INFO"; \
+	$(DOCKER_CMD) pre-commit run mypy-check --hook-stage manual | grep -v "INFO"
+
+.PHONY: integration
+integration: .env ## Runs postgres integration tests with py38.
+	@\
+	$(DOCKER_CMD) tox -e py38-integration -- -nauto
+
+.PHONY: integration-fail-fast
+integration-fail-fast: .env ## Runs postgres integration tests with py38 in "fail fast" mode.
+	@\
+	$(DOCKER_CMD) tox -e py38-integration -- -x -nauto
+
+.PHONY: setup-db
+setup-db: ## Setup Postgres database with docker-compose for system testing.
+	@\
+	docker-compose up -d database && \
+	PGHOST=localhost PGUSER=root PGPASSWORD=password PGDATABASE=postgres bash test/setup_db.sh
+
+# This rule creates a file named .env that is used by docker-compose for passing
+# the USER_ID and GROUP_ID arguments to the Docker image.
+.env: ## Setup step for using using docker-compose with make target.
+	@touch .env
+ifneq ($(OS),Windows_NT)
+ifneq ($(shell uname -s), Darwin)
+	@echo USER_ID=$(shell id -u) > .env
+	@echo GROUP_ID=$(shell id -g) >> .env
+endif
+endif
+
+.PHONY: clean
+clean: ## Resets development environment.
+	@echo 'cleaning repo...'
+	@rm -f .coverage
+	@rm -rf .eggs/
+	@rm -f .env
+	@rm -rf .tox/
+	@rm -rf build/
+	@rm -rf dbt.egg-info/
+	@rm -f dbt_project.yml
+	@rm -rf dist/
+	@rm -f htmlcov/*.{css,html,js,json,png}
+	@rm -rf logs/
+	@rm -rf target/
+	@find . -type f -name '*.pyc' -delete
+	@find . -type d -name '__pycache__' -depth -delete
+	@echo 'done.'
+
+
+.PHONY: help
+help: ## Show this help message.
+	@echo 'usage: make [target] [USE_DOCKER=true]'
+	@echo
+	@echo 'targets:'
+	@grep -E '^[8+a-zA-Z_-]+:.*?## .*$$' $(MAKEFILE_LIST) | awk 'BEGIN {FS = ":.*?## "}; {printf "\033[36m%-30s\033[0m %s\n", $$1, $$2}'
+	@echo
+	@echo 'options:'
+	@echo 'use USE_DOCKER=true to run target in a docker container'

README.md

@@ -1,49 +1,39 @@
-# dbt
+<p align="center">
+  <img src="https://raw.githubusercontent.com/dbt-labs/dbt-core/fa1ea14ddfb1d5ae319d5141844910dd53ab2834/etc/dbt-core.svg" alt="dbt logo" width="750"/>
+</p>
+<p align="center">
+  <a href="https://github.com/dbt-labs/dbt-core/actions/workflows/main.yml">
+    <img src="https://github.com/dbt-labs/dbt-core/actions/workflows/main.yml/badge.svg?event=push" alt="CI Badge"/>
+  </a>
+</p>
 
-dbt (data build tool) helps analysts write reliable, modular code using a workflow that closely mirrors software development.
+**[dbt](https://www.getdbt.com/)** enables data analysts and engineers to transform their data using the same practices that software engineers use to build applications.
 
-A dbt project primarily consists of "models". These models are SQL `select` statements that filter, aggregate, and otherwise transform data to facilitate analytics. Analysts use dbt to [aggregate pageviews into sessions](https://github.com/fishtown-analytics/snowplow), calculate [ad spend ROI](https://github.com/fishtown-analytics/facebook-ads), or report on [email campaign performance](https://github.com/fishtown-analytics/mailchimp).
+![architecture](https://raw.githubusercontent.com/dbt-labs/dbt-core/6c6649f9129d5d108aa3b0526f634cd8f3a9d1ed/etc/dbt-arch.png)
 
-These models frequently build on top of one another. Fortunately, dbt makes it easy to [manage relationships](https://docs.getdbt.com/reference#ref) between models, [test](https://docs.getdbt.com/docs/testing) your assumptions, and [visualize](https://graph.sinterdata.com/) your projects.
+## Understanding dbt
 
-Still reading? Check out the [docs](https://docs.getdbt.com/docs/overview) for more information.
+Analysts using dbt can transform their data by simply writing select statements, while dbt handles turning these statements into tables and views in a data warehouse.
 
-![dbt dag](/etc/dag.png?raw=true)
+These select statements, or "models", form a dbt project. Models frequently build on top of one another – dbt makes it easy to [manage relationships](https://docs.getdbt.com/docs/ref) between models, and [visualize these relationships](https://docs.getdbt.com/docs/documentation), as well as assure the quality of your transformations through [testing](https://docs.getdbt.com/docs/testing).
 
----
-### Getting Started
+![dbt dag](https://raw.githubusercontent.com/dbt-labs/dbt-core/6c6649f9129d5d108aa3b0526f634cd8f3a9d1ed/etc/dbt-dag.png)
 
-- [What is dbt]?
-- Read the [dbt viewpoint]
-- [Installation]
-- Join the [chat][slack-url] on Slack for live questions and support.
+## Getting started
 
----
-### The dbt ecosystem
-- Visualize your dbt graph [here](https://graph.sinterdata.com/)
-- Run your dbt projects on a schedule [here](http://sinterdata.com/)
+- [Install dbt](https://docs.getdbt.com/docs/installation)
+- Read the [introduction](https://docs.getdbt.com/docs/introduction/) and [viewpoint](https://docs.getdbt.com/docs/about/viewpoint/)
 
----
+## Join the dbt Community
 
-[![Code Climate](https://codeclimate.com/github/fishtown-analytics/dbt/badges/gpa.svg)](https://codeclimate.com/github/fishtown-analytics/dbt) [![Slack](https://slack.getdbt.com/badge.svg)](https://slack.getdbt.com)
+- Be part of the conversation in the [dbt Community Slack](http://community.getdbt.com/)
+- Read more on the [dbt Community Discourse](https://discourse.getdbt.com)
 
-### Testing
+## Reporting bugs and contributing code
 
-| service | development | master |
-| --- | --- | --- |
-| CircleCI| [![CircleCI](https://circleci.com/gh/fishtown-analytics/dbt/tree/development.svg?style=svg)](https://circleci.com/gh/fishtown-analytics/dbt/tree/development) | [![CircleCI](https://circleci.com/gh/fishtown-analytics/dbt/tree/master.svg?style=svg)](https://circleci.com/gh/fishtown-analytics/dbt/tree/master) |
-| AppVeyor | [![AppVeyor](https://ci.appveyor.com/api/projects/status/v01rwd3q91jnwp9m/branch/development?svg=true)](https://ci.appveyor.com/project/DrewBanin/dbt/branch/development) | [![AppVeyor](https://ci.appveyor.com/api/projects/status/v01rwd3q91jnwp9m/branch/master?svg=true)](https://ci.appveyor.com/project/DrewBanin/dbt/branch/master) |
-
-[Coverage](https://circleci.com/api/v1/project/fishtown-analytics/dbt/latest/artifacts/0/$CIRCLE_ARTIFACTS/htmlcov/index.html?branch=development)
+- Want to report a bug or request a feature? Let us know on [Slack](http://community.getdbt.com/), or open [an issue](https://github.com/dbt-labs/dbt-core/issues/new)
+- Want to help us build dbt? Check out the [Contributing Guide](https://github.com/dbt-labs/dbt-core/blob/HEAD/CONTRIBUTING.md)
 
 ## Code of Conduct
 
-Everyone interacting in the dbt project's codebases, issue trackers, chat rooms, and mailing lists is expected to follow the [PyPA Code of Conduct].
-
-
-
-[PyPA Code of Conduct]: https://www.pypa.io/en/latest/code-of-conduct/
-[slack-url]: https://slack.getdbt.com/
-[Installation]: https://docs.getdbt.com/docs/installation
-[What is dbt]: https://docs.getdbt.com/docs/overview
-[dbt viewpoint]: https://docs.getdbt.com/docs/viewpoint
+Everyone interacting in the dbt project's codebases, issue trackers, chat rooms, and mailing lists is expected to follow the [dbt Code of Conduct](https://community.getdbt.com/code-of-conduct).

RELEASE.md

@@ -1,89 +0,0 @@
-### Release Procedure :shipit:
-
-#### Branching Strategy
-
-dbt has three types of branches:
-
-- **Trunks** track the latest release of a minor version of dbt. Historically, we used the `master` branch as the trunk. Each minor version release has a corresponding trunk. For example, the `0.11.x` series of releases has a branch called `0.11.latest`. This allows us to release new patch versions under `0.11` without necessarily needing to pull them into the latest version of dbt.
-- **Release Branches** track a specific, not yet complete release of dbt. These releases are codenamed since we don't always know what their semantic version will be. Example: `dev/lucretia-mott` became `0.11.1`.
-- **Feature Branches** track individual features and fixes. On completion they should be merged into a release branch.
-
-#### Git & PyPI
-
-1. Update CHANGELOG.md with the most recent changes
-2. If this is a release candidate, you want to create it off of your release branch. If it's an actual release, you must first merge to master. Open a Pull Request in Github to merge it.
-3. Bump the version using `bumpversion`:
-  - Dry run first by running `bumpversion --new-version <desired-version> <part>` and checking the diff. If it looks correct, clean up the chanages and move on:
-  - Alpha releases: `bumpversion --commit --tag --new-version 0.10.2a1 num`
-  - Patch releases: `bumpversion --commit --tag --new-version 0.10.2 patch`
-  - Minor releases: `bumpversion --commit --tag --new-version 0.11.0 minor`
-  - Major releases: `bumpversion --commit --tag --new-version 1.0.0 major`
-4. Deploy to pypi
-  - `python setup.py sdist upload -r pypi`
-5. Deploy to homebrew (see below)
-6. Deploy to conda-forge (see below)
-7. Git release notes (points to changelog)
-8. Post to slack (point to changelog)
-
-After releasing a new version, it's important to merge the changes back into the other outstanding release branches. This avoids merge conflicts moving forward.
-
-In some cases, where the branches have diverged wildly, it's ok to skip this step. But this means that the changes you just released won't be included in future releases.
-
-#### Homebrew Release Process
-
-1. Clone the `homebrew-dbt` repository:
-
-```
-git clone git@github.com:fishtown-analytics/homebrew-dbt.git
-```
-
-2. For ALL releases (prereleases and version releases), copy the relevant formula. To copy from the latest version release of dbt, do:
-
-```bash
-cp Formula/dbt.rb Formula/dbt@{NEW-VERSION}.rb
-```
-
-To copy from a different version, simply copy the corresponding file.
-
-3. Open the file, and edit the following:
-- the name of the ruby class: this is important, homebrew won't function properly if the class name is wrong. Check historical versions to figure out the right name.
-- under the `bottle` section, remove all of the hashes (lines starting with `sha256`)
-
-4. Create a **Python 3.7** virtualenv, activate it, and then install two packages: `homebrew-pypi-poet`, and the version of dbt you are preparing. I use:
-
-```
-pyenv virtualenv 3.7.0 homebrew-dbt-{VERSION}
-pyenv activate homebrew-dbt-{VERSION}
-pip install dbt=={VERSION} homebrew-pypi-poet
-```
-
-homebrew-pypi-poet is a program that generates a valid homebrew formula for an installed pip package. You want to use it to generate a diff against the existing formula. Then you want to apply the diff for the dependency packages only -- e.g. it will tell you that `google-api-core` has been updated and that you need to use the latest version.
-
-5. reinstall, test, and audit dbt. if the test or audit fails, fix the formula with step 1.
-
-```bash
-brew uninstall --force Formula/{YOUR-FILE}.rb
-brew install Formula/{YOUR-FILE}.rb
-brew test dbt
-brew audit --strict dbt
-```
-
-6. Ask Connor to bottle the change (only his laptop can do it!)
-
-#### Conda Forge Release Process
-
-1. Clone the fork of `conda-forge/dbt-feedstock` [here](https://github.com/fishtown-analytics/dbt-feedstock)
-```bash
-git clone git@github.com:fishtown-analytics/dbt-feedstock.git
-
-```
-2. Update the version and sha256 in `recipe/meta.yml`. To calculate the sha256, run:
-
-```bash
-wget https://github.com/fishtown-analytics/dbt/archive/v{version}.tar.gz
-openssl sha256 v{version}.tar.gz
-```
-
-3. Push the changes and create a PR against `conda-forge/dbt-feedstock`
-
-4. Confirm that all automated conda-forge tests are passing

appveyor.yml

@@ -1,63 +0,0 @@
-version: 1.0.{build}-{branch}
-
-environment:
-  # SDK v7.0 MSVC Express 2008's SetEnv.cmd script will fail if the
-  # /E:ON and /V:ON options are not enabled in the batch script intepreter
-  # See: http://stackoverflow.com/a/13751649/163740
-  CMD_IN_ENV: "cmd /E:ON /V:ON /C .\\appveyor\\run_with_env.cmd"
-  TOX_ENV: "pywin"
-
-  matrix:
-    - PYTHON: "C:\\Python35"
-      PYTHON_VERSION: "3.5.2"
-      PYTHON_ARCH: "32"
-
-    #- PYTHON: "C:\\Python35"
-    #  PYTHON_VERSION: "3.5.2"
-    #  PYTHON_ARCH: "32"
-
-  PGUSER: postgres
-  PGPASSWORD: Password12!
-
-services:
-  - postgresql94
-
-hosts:
-  database: 127.0.0.1
-
-init:
-  - PATH=C:\Program Files\PostgreSQL\9.4\bin\;%PATH%
-  - ps: Set-Content "c:\program files\postgresql\9.4\data\pg_hba.conf" "host   all   all   ::1/128        trust"
-  - ps: Add-Content "c:\program files\postgresql\9.4\data\pg_hba.conf" "host   all   all   127.0.0.1/32   trust"
-
-install:
-  # Download setup scripts and unzip
-  - ps: "wget https://github.com/cloudify-cosmo/appveyor-utils/archive/master.zip -OutFile ./master.zip"
-  - "7z e master.zip */appveyor/* -oappveyor"
-
-  # Install Python (from the official .msi of http://python.org) and pip when
-  # not already installed.
-  - "powershell ./appveyor/install.ps1"
-
-  # Prepend newly installed Python to the PATH of this build (this cannot be
-  # done from inside the powershell script as it would require to restart
-  # the parent CMD process).
-  - "SET PATH=%PYTHON%;%PYTHON%\\Scripts;%PATH%"
-
-  # Check that we have the expected version and architecture for Python
-  - "python --version"
-  - "python -c \"import struct; print(struct.calcsize('P') * 8)\""
-
-build: false  # Not a C# project, build stuff at the test step instead.
-
-before_test:
-  - "%CMD_IN_ENV% pip install psycopg2==2.6.2"
-  - "%CMD_IN_ENV% pip install tox"
-
-test_script:
-  - "bash test/setup_db.sh"
-
-  # this is generally a bad idea TODO
-  - git config --system http.sslverify false
-
-  - "%CMD_IN_ENV% tox -e %TOX_ENV%"

converter.py

@@ -1,73 +0,0 @@
-#!/usr/bin/env python
-import json
-import yaml
-import sys
-import argparse
-from datetime import datetime, timezone
-import dbt.clients.registry as registry
-
-
-def yaml_type(fname):
-    with open(fname) as f:
-        return yaml.load(f)
-
-
-def parse_args():
-    parser = argparse.ArgumentParser()
-    parser.add_argument("--project", type=yaml_type, default="dbt_project.yml")
-    parser.add_argument("--namespace", required=True)
-    return parser.parse_args()
-
-
-def get_full_name(args):
-    return "{}/{}".format(args.namespace, args.project["name"])
-
-
-def init_project_in_packages(args, packages):
-    full_name = get_full_name(args)
-    if full_name not in packages:
-        packages[full_name] = {
-            "name": args.project["name"],
-            "namespace": args.namespace,
-            "latest": args.project["version"],
-            "assets": {},
-            "versions": {},
-        }
-    return packages[full_name]
-
-
-def add_version_to_package(args, project_json):
-    project_json["versions"][args.project["version"]] = {
-        "id": "{}/{}".format(get_full_name(args), args.project["version"]),
-        "name": args.project["name"],
-        "version": args.project["version"],
-        "description": "",
-        "published_at": datetime.now(timezone.utc).astimezone().isoformat(),
-        "packages": args.project.get("packages") or [],
-        "works_with": [],
-        "_source": {
-            "type": "github",
-            "url": "",
-            "readme": "",
-        },
-        "downloads": {
-            "tarball": "",
-            "format": "tgz",
-            "sha1": "",
-        },
-    }
-
-
-def main():
-    args = parse_args()
-    packages = registry.packages()
-    project_json = init_project_in_packages(args, packages)
-    if args.project["version"] in project_json["versions"]:
-        raise Exception("Version {} already in packages JSON"
-                        .format(args.project["version"]),
-                        file=sys.stderr)
-    add_version_to_package(args, project_json)
-    print(json.dumps(packages, indent=2))
-
-if __name__ == "__main__":
-    main()

core/MANIFEST.in

@@ -0,0 +1 @@
+recursive-include dbt/include *.py *.sql *.yml *.html *.md .gitkeep .gitignore

core/README.md

@@ -0,0 +1,39 @@
+<p align="center">
+  <img src="https://raw.githubusercontent.com/dbt-labs/dbt-core/fa1ea14ddfb1d5ae319d5141844910dd53ab2834/etc/dbt-core.svg" alt="dbt logo" width="750"/>
+</p>
+<p align="center">
+  <a href="https://github.com/dbt-labs/dbt-core/actions/workflows/main.yml">
+    <img src="https://github.com/dbt-labs/dbt-core/actions/workflows/main.yml/badge.svg?event=push" alt="CI Badge"/>
+  </a>
+</p>
+
+**[dbt](https://www.getdbt.com/)** enables data analysts and engineers to transform their data using the same practices that software engineers use to build applications.
+
+![architecture](https://raw.githubusercontent.com/dbt-labs/dbt-core/6c6649f9129d5d108aa3b0526f634cd8f3a9d1ed/etc/dbt-arch.png)
+
+## Understanding dbt
+
+Analysts using dbt can transform their data by simply writing select statements, while dbt handles turning these statements into tables and views in a data warehouse.
+
+These select statements, or "models", form a dbt project. Models frequently build on top of one another – dbt makes it easy to [manage relationships](https://docs.getdbt.com/docs/ref) between models, and [visualize these relationships](https://docs.getdbt.com/docs/documentation), as well as assure the quality of your transformations through [testing](https://docs.getdbt.com/docs/testing).
+
+![dbt dag](https://raw.githubusercontent.com/dbt-labs/dbt-core/6c6649f9129d5d108aa3b0526f634cd8f3a9d1ed/etc/dbt-dag.png)
+
+## Getting started
+
+- [Install dbt](https://docs.getdbt.com/docs/installation)
+- Read the [introduction](https://docs.getdbt.com/docs/introduction/) and [viewpoint](https://docs.getdbt.com/docs/about/viewpoint/)
+
+## Join the dbt Community
+
+- Be part of the conversation in the [dbt Community Slack](http://community.getdbt.com/)
+- Read more on the [dbt Community Discourse](https://discourse.getdbt.com)
+
+## Reporting bugs and contributing code
+
+- Want to report a bug or request a feature? Let us know on [Slack](http://community.getdbt.com/), or open [an issue](https://github.com/dbt-labs/dbt-core/issues/new)
+- Want to help us build dbt? Check out the [Contributing Guide](https://github.com/dbt-labs/dbt-core/blob/HEAD/CONTRIBUTING.md)
+
+## Code of Conduct
+
+Everyone interacting in the dbt project's codebases, issue trackers, chat rooms, and mailing lists is expected to follow the [dbt Code of Conduct](https://community.getdbt.com/code-of-conduct).

core/dbt/README.md

@@ -0,0 +1,51 @@
+# core/dbt directory README
+
+## The following are individual files in this directory.
+
+### deprecations.py
+
+### flags.py
+
+### main.py
+
+### tracking.py
+
+### version.py
+
+### lib.py
+
+### node_types.py
+
+### helper_types.py
+
+### links.py
+
+### semver.py
+
+### ui.py
+
+### compilation.py
+
+### dataclass_schema.py
+
+### exceptions.py
+
+### hooks.py
+
+### logger.py
+
+### profiler.py
+
+### utils.py
+
+
+## The subdirectories will be documented in a README in the subdirectory
+* config
+* include
+* adapters
+* context
+* deps
+* graph
+* task
+* clients
+* events

core/dbt/adapters/README.md

@@ -0,0 +1 @@
+# Adapters README

core/dbt/adapters/base/__init__.py

@@ -0,0 +1,14 @@
+# these are all just exports, #noqa them so flake8 will be happy
+
+# TODO: Should we still include this in the `adapters` namespace?
+from dbt.contracts.connection import Credentials  # noqa
+from dbt.adapters.base.meta import available  # noqa
+from dbt.adapters.base.connections import BaseConnectionManager  # noqa
+from dbt.adapters.base.relation import (  # noqa
+    BaseRelation,
+    RelationType,
+    SchemaSearchMap,
+)
+from dbt.adapters.base.column import Column  # noqa
+from dbt.adapters.base.impl import AdapterConfig, BaseAdapter  # noqa
+from dbt.adapters.base.plugin import AdapterPlugin  # noqa

core/dbt/adapters/base/column.py

@@ -0,0 +1,159 @@
+from dataclasses import dataclass
+import re
+from typing import Dict, ClassVar, Any, Optional
+
+from dbt.exceptions import RuntimeException
+
+
+@dataclass
+class Column:
+    TYPE_LABELS: ClassVar[Dict[str, str]] = {
+        "STRING": "TEXT",
+        "TIMESTAMP": "TIMESTAMP",
+        "FLOAT": "FLOAT",
+        "INTEGER": "INT",
+    }
+    column: str
+    dtype: str
+    char_size: Optional[int] = None
+    numeric_precision: Optional[Any] = None
+    numeric_scale: Optional[Any] = None
+
+    @classmethod
+    def translate_type(cls, dtype: str) -> str:
+        return cls.TYPE_LABELS.get(dtype.upper(), dtype)
+
+    @classmethod
+    def create(cls, name, label_or_dtype: str) -> "Column":
+        column_type = cls.translate_type(label_or_dtype)
+        return cls(name, column_type)
+
+    @property
+    def name(self) -> str:
+        return self.column
+
+    @property
+    def quoted(self) -> str:
+        return '"{}"'.format(self.column)
+
+    @property
+    def data_type(self) -> str:
+        if self.is_string():
+            return self.string_type(self.string_size())
+        elif self.is_numeric():
+            return self.numeric_type(self.dtype, self.numeric_precision, self.numeric_scale)
+        else:
+            return self.dtype
+
+    def is_string(self) -> bool:
+        return self.dtype.lower() in ["text", "character varying", "character", "varchar"]
+
+    def is_number(self):
+        return any([self.is_integer(), self.is_numeric(), self.is_float()])
+
+    def is_float(self):
+        return self.dtype.lower() in [
+            # floats
+            "real",
+            "float4",
+            "float",
+            "double precision",
+            "float8",
+        ]
+
+    def is_integer(self) -> bool:
+        return self.dtype.lower() in [
+            # real types
+            "smallint",
+            "integer",
+            "bigint",
+            "smallserial",
+            "serial",
+            "bigserial",
+            # aliases
+            "int2",
+            "int4",
+            "int8",
+            "serial2",
+            "serial4",
+            "serial8",
+        ]
+
+    def is_numeric(self) -> bool:
+        return self.dtype.lower() in ["numeric", "decimal"]
+
+    def string_size(self) -> int:
+        if not self.is_string():
+            raise RuntimeException("Called string_size() on non-string field!")
+
+        if self.dtype == "text" or self.char_size is None:
+            # char_size should never be None. Handle it reasonably just in case
+            return 256
+        else:
+            return int(self.char_size)
+
+    def can_expand_to(self, other_column: "Column") -> bool:
+        """returns True if this column can be expanded to the size of the
+        other column"""
+        if not self.is_string() or not other_column.is_string():
+            return False
+
+        return other_column.string_size() > self.string_size()
+
+    def literal(self, value: Any) -> str:
+        return "{}::{}".format(value, self.data_type)
+
+    @classmethod
+    def string_type(cls, size: int) -> str:
+        return "character varying({})".format(size)
+
+    @classmethod
+    def numeric_type(cls, dtype: str, precision: Any, scale: Any) -> str:
+        # This could be decimal(...), numeric(...), number(...)
+        # Just use whatever was fed in here -- don't try to get too clever
+        if precision is None or scale is None:
+            return dtype
+        else:
+            return "{}({},{})".format(dtype, precision, scale)
+
+    def __repr__(self) -> str:
+        return "<Column {} ({})>".format(self.name, self.data_type)
+
+    @classmethod
+    def from_description(cls, name: str, raw_data_type: str) -> "Column":
+        match = re.match(r"([^(]+)(\([^)]+\))?", raw_data_type)
+        if match is None:
+            raise RuntimeException(f'Could not interpret data type "{raw_data_type}"')
+        data_type, size_info = match.groups()
+        char_size = None
+        numeric_precision = None
+        numeric_scale = None
+        if size_info is not None:
+            # strip out the parentheses
+            size_info = size_info[1:-1]
+            parts = size_info.split(",")
+            if len(parts) == 1:
+                try:
+                    char_size = int(parts[0])
+                except ValueError:
+                    raise RuntimeException(
+                        f'Could not interpret data_type "{raw_data_type}": '
+                        f'could not convert "{parts[0]}" to an integer'
+                    )
+            elif len(parts) == 2:
+                try:
+                    numeric_precision = int(parts[0])
+                except ValueError:
+                    raise RuntimeException(
+                        f'Could not interpret data_type "{raw_data_type}": '
+                        f'could not convert "{parts[0]}" to an integer'
+                    )
+                try:
+                    numeric_scale = int(parts[1])
+                except ValueError:
+                    raise RuntimeException(
+                        f'Could not interpret data_type "{raw_data_type}": '
+                        f'could not convert "{parts[1]}" to an integer'
+                    )
+
+        return cls(name, data_type, char_size, numeric_precision, numeric_scale)

core/dbt/adapters/base/connections.py

@@ -0,0 +1,296 @@
+import abc
+import os
+
+# multiprocessing.RLock is a function returning this type
+from multiprocessing.synchronize import RLock
+from threading import get_ident
+from typing import Dict, Tuple, Hashable, Optional, ContextManager, List
+
+import agate
+
+import dbt.exceptions
+from dbt.contracts.connection import (
+    Connection,
+    Identifier,
+    ConnectionState,
+    AdapterRequiredConfig,
+    LazyHandle,
+    AdapterResponse,
+)
+from dbt.contracts.graph.manifest import Manifest
+from dbt.adapters.base.query_headers import (
+    MacroQueryStringSetter,
+)
+from dbt.events.functions import fire_event
+from dbt.events.types import (
+    NewConnection,
+    ConnectionReused,
+    ConnectionLeftOpen,
+    ConnectionLeftOpen2,
+    ConnectionClosed,
+    ConnectionClosed2,
+    Rollback,
+    RollbackFailed,
+)
+from dbt import flags
+
+
+class BaseConnectionManager(metaclass=abc.ABCMeta):
+    """Methods to implement:
+        - exception_handler
+        - cancel_open
+        - open
+        - begin
+        - commit
+        - clear_transaction
+        - execute
+
+    You must also set the 'TYPE' class attribute with a class-unique constant
+    string.
+    """
+
+    TYPE: str = NotImplemented
+
+    def __init__(self, profile: AdapterRequiredConfig):
+        self.profile = profile
+        self.thread_connections: Dict[Hashable, Connection] = {}
+        self.lock: RLock = flags.MP_CONTEXT.RLock()
+        self.query_header: Optional[MacroQueryStringSetter] = None
+
+    def set_query_header(self, manifest: Manifest) -> None:
+        self.query_header = MacroQueryStringSetter(self.profile, manifest)
+
+    @staticmethod
+    def get_thread_identifier() -> Hashable:
+        # note that get_ident() may be re-used, but we should never experience
+        # that within a single process
+        return (os.getpid(), get_ident())
+
+    def get_thread_connection(self) -> Connection:
+        key = self.get_thread_identifier()
+        with self.lock:
+            if key not in self.thread_connections:
+                raise dbt.exceptions.InvalidConnectionException(key, list(self.thread_connections))
+            return self.thread_connections[key]
+
+    def set_thread_connection(self, conn: Connection) -> None:
+        key = self.get_thread_identifier()
+        if key in self.thread_connections:
+            raise dbt.exceptions.InternalException(
+                "In set_thread_connection, existing connection exists for {}"
+            )
+        self.thread_connections[key] = conn
+
+    def get_if_exists(self) -> Optional[Connection]:
+        key = self.get_thread_identifier()
+        with self.lock:
+            return self.thread_connections.get(key)
+
+    def clear_thread_connection(self) -> None:
+        key = self.get_thread_identifier()
+        with self.lock:
+            if key in self.thread_connections:
+                del self.thread_connections[key]
+
+    def clear_transaction(self) -> None:
+        """Clear any existing transactions."""
+        conn = self.get_thread_connection()
+        if conn is not None:
+            if conn.transaction_open:
+                self._rollback(conn)
+            self.begin()
+            self.commit()
+
+    def rollback_if_open(self) -> None:
+        conn = self.get_if_exists()
+        if conn is not None and conn.handle and conn.transaction_open:
+            self._rollback(conn)
+
+    @abc.abstractmethod
+    def exception_handler(self, sql: str) -> ContextManager:
+        """Create a context manager that handles exceptions caused by database
+        interactions.
+
+        :param str sql: The SQL string that the block inside the context
+            manager is executing.
+        :return: A context manager that handles exceptions raised by the
+            underlying database.
+        """
+        raise dbt.exceptions.NotImplementedException(
+            "`exception_handler` is not implemented for this adapter!"
+        )
+
+    def set_connection_name(self, name: Optional[str] = None) -> Connection:
+        conn_name: str
+        if name is None:
+            # if a name isn't specified, we'll re-use a single handle
+            # named 'master'
+            conn_name = "master"
+        else:
+            if not isinstance(name, str):
+                raise dbt.exceptions.CompilerException(
+                    f"For connection name, got {name} - not a string!"
+                )
+            assert isinstance(name, str)
+            conn_name = name
+
+        conn = self.get_if_exists()
+        if conn is None:
+            conn = Connection(
+                type=Identifier(self.TYPE),
+                name=None,
+                state=ConnectionState.INIT,
+                transaction_open=False,
+                handle=None,
+                credentials=self.profile.credentials,
+            )
+            self.set_thread_connection(conn)
+
+        if conn.name == conn_name and conn.state == "open":
+            return conn
+
+        fire_event(NewConnection(conn_name=conn_name, conn_type=self.TYPE))
+
+        if conn.state == "open":
+            fire_event(ConnectionReused(conn_name=conn_name))
+        else:
+            conn.handle = LazyHandle(self.open)
+
+        conn.name = conn_name
+        return conn
+
+    @abc.abstractmethod
+    def cancel_open(self) -> Optional[List[str]]:
+        """Cancel all open connections on the adapter. (passable)"""
+        raise dbt.exceptions.NotImplementedException(
+            "`cancel_open` is not implemented for this adapter!"
+        )
+
+    @abc.abstractclassmethod
+    def open(cls, connection: Connection) -> Connection:
+        """Open the given connection on the adapter and return it.
+
+        This may mutate the given connection (in particular, its state and its
+        handle).
+
+        This should be thread-safe, or hold the lock if necessary. The given
+        connection should not be in either in_use or available.
+        """
+        raise dbt.exceptions.NotImplementedException("`open` is not implemented for this adapter!")
+
+    def release(self) -> None:
+        with self.lock:
+            conn = self.get_if_exists()
+            if conn is None:
+                return
+
+        try:
+            # always close the connection. close() calls _rollback() if there
+            # is an open transaction
+            self.close(conn)
+        except Exception:
+            # if rollback or close failed, remove our busted connection
+            self.clear_thread_connection()
+            raise
+
+    def cleanup_all(self) -> None:
+        with self.lock:
+            for connection in self.thread_connections.values():
+                if connection.state not in {"closed", "init"}:
+                    fire_event(ConnectionLeftOpen(conn_name=connection.name))
+                else:
+                    fire_event(ConnectionClosed(conn_name=connection.name))
+                self.close(connection)
+
+            # garbage collect these connections
+            self.thread_connections.clear()
+
+    @abc.abstractmethod
+    def begin(self) -> None:
+        """Begin a transaction. (passable)"""
+        raise dbt.exceptions.NotImplementedException(
+            "`begin` is not implemented for this adapter!"
+        )
+
+    @abc.abstractmethod
+    def commit(self) -> None:
+        """Commit a transaction. (passable)"""
+        raise dbt.exceptions.NotImplementedException(
+            "`commit` is not implemented for this adapter!"
+        )
+
+    @classmethod
+    def _rollback_handle(cls, connection: Connection) -> None:
+        """Perform the actual rollback operation."""
+        try:
+            connection.handle.rollback()
+        except Exception:
+            fire_event(RollbackFailed(conn_name=connection.name))
+
+    @classmethod
+    def _close_handle(cls, connection: Connection) -> None:
+        """Perform the actual close operation."""
+        # On windows, sometimes connection handles don't have a close() attr.
+        if hasattr(connection.handle, "close"):
+            fire_event(ConnectionClosed2(conn_name=connection.name))
+            connection.handle.close()
+        else:
+            fire_event(ConnectionLeftOpen2(conn_name=connection.name))
+
+    @classmethod
+    def _rollback(cls, connection: Connection) -> None:
+        """Roll back the given connection."""
+        if connection.transaction_open is False:
+            raise dbt.exceptions.InternalException(
+                f"Tried to rollback transaction on connection "
+                f'"{connection.name}", but it does not have one open!'
+            )
+
+        fire_event(Rollback(conn_name=connection.name))
+        cls._rollback_handle(connection)
+
+        connection.transaction_open = False
+
+    @classmethod
+    def close(cls, connection: Connection) -> Connection:
+        # if the connection is in closed or init, there's nothing to do
+        if connection.state in {ConnectionState.CLOSED, ConnectionState.INIT}:
+            return connection
+
+        if connection.transaction_open and connection.handle:
+            fire_event(Rollback(conn_name=connection.name))
+            cls._rollback_handle(connection)
+        connection.transaction_open = False
+
+        cls._close_handle(connection)
+        connection.state = ConnectionState.CLOSED
+
+        return connection
+
+    def commit_if_has_connection(self) -> None:
+        """If the named connection exists, commit the current transaction."""
+        connection = self.get_if_exists()
+        if connection:
+            self.commit()
+
+    def _add_query_comment(self, sql: str) -> str:
+        if self.query_header is None:
+            return sql
+        return self.query_header.add(sql)
+
+    @abc.abstractmethod
+    def execute(
+        self, sql: str, auto_begin: bool = False, fetch: bool = False
+    ) -> Tuple[AdapterResponse, agate.Table]:
+        """Execute the given SQL.
+
+        :param str sql: The sql to execute.
+        :param bool auto_begin: If set, and dbt is not currently inside a
+            transaction, automatically begin one.
+        :param bool fetch: If set, fetch results.
+        :return: A tuple of the query status and results (empty if fetch=False).
+        :rtype: Tuple[AdapterResponse, agate.Table]
+        """
+        raise dbt.exceptions.NotImplementedException(
+            "`execute` is not implemented for this adapter!"
+        )

core/dbt/adapters/base/meta.py

@@ -0,0 +1,128 @@
+import abc
+from functools import wraps
+from typing import Callable, Optional, Any, FrozenSet, Dict, Set
+
+from dbt.deprecations import warn, renamed_method
+
+
+Decorator = Callable[[Any], Callable]
+
+
+class _Available:
+    def __call__(self, func: Callable) -> Callable:
+        func._is_available_ = True  # type: ignore
+        return func
+
+    def parse(self, parse_replacement: Callable) -> Decorator:
+        """A decorator factory to indicate that a method on the adapter will be
+        exposed to the database wrapper, and will be stubbed out at parse time
+        with the given function.
+
+        @available.parse()
+        def my_method(self, a, b):
+            if something:
+                return None
+            return big_expensive_db_query()
+
+        @available.parse(lambda *args, **args: {})
+        def my_other_method(self, a, b):
+            x = {}
+            x.update(big_expensive_db_query())
+            return x
+        """
+
+        def inner(func):
+            func._parse_replacement_ = parse_replacement
+            return self(func)
+
+        return inner
+
+    def deprecated(
+        self, supported_name: str, parse_replacement: Optional[Callable] = None
+    ) -> Decorator:
+        """A decorator that marks a function as available, but also prints a
+        deprecation warning. Use like
+
+        @available.deprecated('my_new_method')
+        def my_old_method(self, arg):
+            args = compatability_shim(arg)
+            return self.my_new_method(*args)
+
+        @available.deprecated('my_new_slow_method', lambda *a, **k: (0, ''))
+        def my_old_slow_method(self, arg):
+            args = compatibility_shim(arg)
+            return self.my_new_slow_method(*args)
+
+        To make `adapter.my_old_method` available but also print out a warning
+        on use directing users to `my_new_method`.
+
+        The optional parse_replacement, if provided, will provide a parse-time
+        replacement for the actual method (see `available.parse`).
+        """
+
+        def wrapper(func):
+            func_name = func.__name__
+            renamed_method(func_name, supported_name)
+
+            @wraps(func)
+            def inner(*args, **kwargs):
+                warn("adapter:{}".format(func_name))
+                return func(*args, **kwargs)
+
+            if parse_replacement:
+                available_function = self.parse(parse_replacement)
+            else:
+                available_function = self
+            return available_function(inner)
+
+        return wrapper
+
+    def parse_none(self, func: Callable) -> Callable:
+        wrapper = self.parse(lambda *a, **k: None)
+        return wrapper(func)
+
+    def parse_list(self, func: Callable) -> Callable:
+        wrapper = self.parse(lambda *a, **k: [])
+        return wrapper(func)
+
+
+available = _Available()
+
+
+class AdapterMeta(abc.ABCMeta):
+    _available_: FrozenSet[str]
+    _parse_replacements_: Dict[str, Callable]
+
+    def __new__(mcls, name, bases, namespace, **kwargs):
+        # mypy does not like the `**kwargs`. But `ABCMeta` itself takes
+        # `**kwargs` in its argspec here (and passes them to `type.__new__`.
+        # I'm not sure there is any benefit to it after poking around a bit,
+        # but having it doesn't hurt on the python side (and omitting it could
+        # hurt for obscure metaclass reasons, for all I know)
+        cls = abc.ABCMeta.__new__(mcls, name, bases, namespace, **kwargs)  # type: ignore
+
+        # this is very much inspired by ABCMeta's own implementation
+
+        # dict mapping the method name to whether the model name should be
+        # injected into the arguments. All methods in here are exposed to the
+        # context.
+        available: Set[str] = set()
+        replacements: Dict[str, Any] = {}
+
+        # collect base class data first
+        for base in bases:
+            available.update(getattr(base, "_available_", set()))
+            replacements.update(getattr(base, "_parse_replacements_", set()))
+
+        # override with local data if it exists
+        for name, value in namespace.items():
+            if getattr(value, "_is_available_", False):
+                available.add(name)
+            parse_replacement = getattr(value, "_parse_replacement_", None)
+            if parse_replacement is not None:
+                replacements[name] = parse_replacement
+
+        cls._available_ = frozenset(available)
+        # should this be a namedtuple so it will be immutable like _available_?
+        cls._parse_replacements_ = replacements
+        return cls

core/dbt/adapters/base/plugin.py

@@ -0,0 +1,42 @@
+from typing import List, Optional, Type
+
+from dbt.adapters.base import Credentials
+from dbt.exceptions import CompilationException
+from dbt.adapters.protocol import AdapterProtocol
+
+
+def project_name_from_path(include_path: str) -> str:
+    # avoid an import cycle
+    from dbt.config.project import Project
+
+    partial = Project.partial_load(include_path)
+    if partial.project_name is None:
+        raise CompilationException(f"Invalid project at {include_path}: name not set!")
+    return partial.project_name
+
+
+class AdapterPlugin:
+    """Defines the basic requirements for a dbt adapter plugin.
+
+    :param include_path: The path to this adapter plugin's root
+    :param dependencies: A list of adapter names that this adapter depends
+        upon.
+    """
+
+    def __init__(
+        self,
+        adapter: Type[AdapterProtocol],
+        credentials: Type[Credentials],
+        include_path: str,
+        dependencies: Optional[List[str]] = None,
+    ):
+
+        self.adapter: Type[AdapterProtocol] = adapter
+        self.credentials: Type[Credentials] = credentials
+        self.include_path: str = include_path
+        self.project_name: str = project_name_from_path(include_path)
+        self.dependencies: List[str]
+        if dependencies is None:
+            self.dependencies = []
+        else:
+            self.dependencies = dependencies

core/dbt/adapters/base/query_headers.py

@@ -0,0 +1,102 @@
+from threading import local
+from typing import Optional, Callable, Dict, Any
+
+from dbt.clients.jinja import QueryStringGenerator
+
+from dbt.context.manifest import generate_query_header_context
+from dbt.contracts.connection import AdapterRequiredConfig, QueryComment
+from dbt.contracts.graph.compiled import CompileResultNode
+from dbt.contracts.graph.manifest import Manifest
+from dbt.exceptions import RuntimeException
+
+
+class NodeWrapper:
+    def __init__(self, node):
+        self._inner_node = node
+
+    def __getattr__(self, name):
+        return getattr(self._inner_node, name, "")
+
+
+class _QueryComment(local):
+    """A thread-local class storing thread-specific state information for
+    connection management, namely:
+        - the current thread's query comment.
+        - a source_name indicating what set the current thread's query comment
+    """
+
+    def __init__(self, initial):
+        self.query_comment: Optional[str] = initial
+        self.append = False
+
+    def add(self, sql: str) -> str:
+        if not self.query_comment:
+            return sql
+
+        if self.append:
+            # replace last ';' with '<comment>;'
+            sql = sql.rstrip()
+            if sql[-1] == ";":
+                sql = sql[:-1]
+                return "{}\n/* {} */;".format(sql, self.query_comment.strip())
+
+            return "{}\n/* {} */".format(sql, self.query_comment.strip())
+
+        return "/* {} */\n{}".format(self.query_comment.strip(), sql)
+
+    def set(self, comment: Optional[str], append: bool):
+        if isinstance(comment, str) and "*/" in comment:
+            # tell the user "no" so they don't hurt themselves by writing
+            # garbage
+            raise RuntimeException(f'query comment contains illegal value "*/": {comment}')
+        self.query_comment = comment
+        self.append = append
+
+
+QueryStringFunc = Callable[[str, Optional[NodeWrapper]], str]
+
+
+class MacroQueryStringSetter:
+    def __init__(self, config: AdapterRequiredConfig, manifest: Manifest):
+        self.manifest = manifest
+        self.config = config
+
+        comment_macro = self._get_comment_macro()
+        self.generator: QueryStringFunc = lambda name, model: ""
+        # if the comment value was None or the empty string, just skip it
+        if comment_macro:
+            assert isinstance(comment_macro, str)
+            macro = "\n".join(
+                (
+                    "{%- macro query_comment_macro(connection_name, node) -%}",
+                    comment_macro,
+                    "{% endmacro %}",
+                )
+            )
+            ctx = self._get_context()
+            self.generator = QueryStringGenerator(macro, ctx)
+        self.comment = _QueryComment(None)
+        self.reset()
+
+    def _get_comment_macro(self) -> Optional[str]:
+        return self.config.query_comment.comment
+
+    def _get_context(self) -> Dict[str, Any]:
+        return generate_query_header_context(self.config, self.manifest)
+
+    def add(self, sql: str) -> str:
+        return self.comment.add(sql)
+
+    def reset(self):
+        self.set("master", None)
+
+    def set(self, name: str, node: Optional[CompileResultNode]):
+        wrapped: Optional[NodeWrapper] = None
+        if node is not None:
+            wrapped = NodeWrapper(node)
+        comment_str = self.generator(name, wrapped)
+
+        append = False
+        if isinstance(self.config.query_comment, QueryComment):
+            append = self.config.query_comment.append
+        self.comment.set(comment_str, append)

core/dbt/adapters/base/relation.py

@@ -0,0 +1,452 @@
+from collections.abc import Hashable
+from dataclasses import dataclass
+from typing import Optional, TypeVar, Any, Type, Dict, Union, Iterator, Tuple, Set
+
+from dbt.contracts.graph.compiled import CompiledNode
+from dbt.contracts.graph.parsed import ParsedSourceDefinition, ParsedNode
+from dbt.contracts.relation import (
+    RelationType,
+    ComponentName,
+    HasQuoting,
+    FakeAPIObject,
+    Policy,
+    Path,
+)
+from dbt.exceptions import InternalException
+from dbt.node_types import NodeType
+from dbt.utils import filter_null_values, deep_merge, classproperty
+
+import dbt.exceptions
+
+
+Self = TypeVar("Self", bound="BaseRelation")
+
+
+@dataclass(frozen=True, eq=False, repr=False)
+class BaseRelation(FakeAPIObject, Hashable):
+    path: Path
+    type: Optional[RelationType] = None
+    quote_character: str = '"'
+    include_policy: Policy = Policy()
+    quote_policy: Policy = Policy()
+    dbt_created: bool = False
+
+    def _is_exactish_match(self, field: ComponentName, value: str) -> bool:
+        if self.dbt_created and self.quote_policy.get_part(field) is False:
+            return self.path.get_lowered_part(field) == value.lower()
+        else:
+            return self.path.get_part(field) == value
+
+    @classmethod
+    def _get_field_named(cls, field_name):
+        for field, _ in cls._get_fields():
+            if field.name == field_name:
+                return field
+        # this should be unreachable
+        raise ValueError(f"BaseRelation has no {field_name} field!")
+
+    def __eq__(self, other):
+        if not isinstance(other, self.__class__):
+            return False
+        return self.to_dict(omit_none=True) == other.to_dict(omit_none=True)
+
+    @classmethod
+    def get_default_quote_policy(cls) -> Policy:
+        return cls._get_field_named("quote_policy").default
+
+    @classmethod
+    def get_default_include_policy(cls) -> Policy:
+        return cls._get_field_named("include_policy").default
+
+    def get(self, key, default=None):
+        """Override `.get` to return a metadata object so we don't break
+        dbt_utils.
+        """
+        if key == "metadata":
+            return {"type": self.__class__.__name__}
+        return super().get(key, default)
+
+    def matches(
+        self,
+        database: Optional[str] = None,
+        schema: Optional[str] = None,
+        identifier: Optional[str] = None,
+    ) -> bool:
+        search = filter_null_values(
+            {
+                ComponentName.Database: database,
+                ComponentName.Schema: schema,
+                ComponentName.Identifier: identifier,
+            }
+        )
+
+        if not search:
+            # nothing was passed in
+            raise dbt.exceptions.RuntimeException(
+                "Tried to match relation, but no search path was passed!"
+            )
+
+        exact_match = True
+        approximate_match = True
+
+        for k, v in search.items():
+            if not self._is_exactish_match(k, v):
+                exact_match = False
+            if str(self.path.get_lowered_part(k)).strip(self.quote_character) != v.lower().strip(
+                self.quote_character
+            ):
+                approximate_match = False  # type: ignore[union-attr]
+
+        if approximate_match and not exact_match:
+            target = self.create(database=database, schema=schema, identifier=identifier)
+            dbt.exceptions.approximate_relation_match(target, self)
+
+        return exact_match
+
+    def replace_path(self, **kwargs):
+        return self.replace(path=self.path.replace(**kwargs))
+
+    def quote(
+        self: Self,
+        database: Optional[bool] = None,
+        schema: Optional[bool] = None,
+        identifier: Optional[bool] = None,
+    ) -> Self:
+        policy = filter_null_values(
+            {
+                ComponentName.Database: database,
+                ComponentName.Schema: schema,
+                ComponentName.Identifier: identifier,
+            }
+        )
+
+        new_quote_policy = self.quote_policy.replace_dict(policy)
+        return self.replace(quote_policy=new_quote_policy)
+
+    def include(
+        self: Self,
+        database: Optional[bool] = None,
+        schema: Optional[bool] = None,
+        identifier: Optional[bool] = None,
+    ) -> Self:
+        policy = filter_null_values(
+            {
+                ComponentName.Database: database,
+                ComponentName.Schema: schema,
+                ComponentName.Identifier: identifier,
+            }
+        )
+
+        new_include_policy = self.include_policy.replace_dict(policy)
+        return self.replace(include_policy=new_include_policy)
+
+    def information_schema(self, view_name=None) -> "InformationSchema":
+        # some of our data comes from jinja, where things can be `Undefined`.
+        if not isinstance(view_name, str):
+            view_name = None
+
+        # Kick the user-supplied schema out of the information schema relation
+        # Instead address this as <database>.information_schema by default
+        info_schema = InformationSchema.from_relation(self, view_name)
+        return info_schema.incorporate(path={"schema": None})
+
+    def information_schema_only(self) -> "InformationSchema":
+        return self.information_schema()
+
+    def without_identifier(self) -> "BaseRelation":
+        """Return a form of this relation that only has the database and schema
+        set to included. To get the appropriately-quoted form the schema out of
+        the result (for use as part of a query), use `.render()`. To get the
+        raw database or schema name, use `.database` or `.schema`.
+
+        The hash of the returned object is the result of render().
+        """
+        return self.include(identifier=False).replace_path(identifier=None)
+
+    def _render_iterator(self) -> Iterator[Tuple[Optional[ComponentName], Optional[str]]]:
+
+        for key in ComponentName:
+            path_part: Optional[str] = None
+            if self.include_policy.get_part(key):
+                path_part = self.path.get_part(key)
+                if path_part is not None and self.quote_policy.get_part(key):
+                    path_part = self.quoted(path_part)
+            yield key, path_part
+
+    def render(self) -> str:
+        # if there is nothing set, this will return the empty string.
+        return ".".join(part for _, part in self._render_iterator() if part is not None)
+
+    def quoted(self, identifier):
+        return "{quote_char}{identifier}{quote_char}".format(
+            quote_char=self.quote_character,
+            identifier=identifier,
+        )
+
+    @classmethod
+    def create_from_source(cls: Type[Self], source: ParsedSourceDefinition, **kwargs: Any) -> Self:
+        source_quoting = source.quoting.to_dict(omit_none=True)
+        source_quoting.pop("column", None)
+        quote_policy = deep_merge(
+            cls.get_default_quote_policy().to_dict(omit_none=True),
+            source_quoting,
+            kwargs.get("quote_policy", {}),
+        )
+
+        return cls.create(
+            database=source.database,
+            schema=source.schema,
+            identifier=source.identifier,
+            quote_policy=quote_policy,
+            **kwargs,
+        )
+
+    @staticmethod
+    def add_ephemeral_prefix(name: str):
+        return f"__dbt__cte__{name}"
+
+    @classmethod
+    def create_ephemeral_from_node(
+        cls: Type[Self],
+        config: HasQuoting,
+        node: Union[ParsedNode, CompiledNode],
+    ) -> Self:
+        # Note that ephemeral models are based on the name.
+        identifier = cls.add_ephemeral_prefix(node.name)
+        return cls.create(
+            type=cls.CTE,
+            identifier=identifier,
+        ).quote(identifier=False)
+
+    @classmethod
+    def create_from_node(
+        cls: Type[Self],
+        config: HasQuoting,
+        node: Union[ParsedNode, CompiledNode],
+        quote_policy: Optional[Dict[str, bool]] = None,
+        **kwargs: Any,
+    ) -> Self:
+        if quote_policy is None:
+            quote_policy = {}
+
+        quote_policy = dbt.utils.merge(config.quoting, quote_policy)
+
+        return cls.create(
+            database=node.database,
+            schema=node.schema,
+            identifier=node.alias,
+            quote_policy=quote_policy,
+            **kwargs,
+        )
+
+    @classmethod
+    def create_from(
+        cls: Type[Self],
+        config: HasQuoting,
+        node: Union[CompiledNode, ParsedNode, ParsedSourceDefinition],
+        **kwargs: Any,
+    ) -> Self:
+        if node.resource_type == NodeType.Source:
+            if not isinstance(node, ParsedSourceDefinition):
+                raise InternalException(
+                    "type mismatch, expected ParsedSourceDefinition but got {}".format(type(node))
+                )
+            return cls.create_from_source(node, **kwargs)
+        else:
+            if not isinstance(node, (ParsedNode, CompiledNode)):
+                raise InternalException(
+                    "type mismatch, expected ParsedNode or CompiledNode but "
+                    "got {}".format(type(node))
+                )
+            return cls.create_from_node(config, node, **kwargs)
+
+    @classmethod
+    def create(
+        cls: Type[Self],
+        database: Optional[str] = None,
+        schema: Optional[str] = None,
+        identifier: Optional[str] = None,
+        type: Optional[RelationType] = None,
+        **kwargs,
+    ) -> Self:
+        kwargs.update(
+            {
+                "path": {
+                    "database": database,
+                    "schema": schema,
+                    "identifier": identifier,
+                },
+                "type": type,
+            }
+        )
+        return cls.from_dict(kwargs)
+
+    def __repr__(self) -> str:
+        return "<{} {}>".format(self.__class__.__name__, self.render())
+
+    def __hash__(self) -> int:
+        return hash(self.render())
+
+    def __str__(self) -> str:
+        return self.render()
+
+    @property
+    def database(self) -> Optional[str]:
+        return self.path.database
+
+    @property
+    def schema(self) -> Optional[str]:
+        return self.path.schema
+
+    @property
+    def identifier(self) -> Optional[str]:
+        return self.path.identifier
+
+    @property
+    def table(self) -> Optional[str]:
+        return self.path.identifier
+
+    # Here for compatibility with old Relation interface
+    @property
+    def name(self) -> Optional[str]:
+        return self.identifier
+
+    @property
+    def is_table(self) -> bool:
+        return self.type == RelationType.Table
+
+    @property
+    def is_cte(self) -> bool:
+        return self.type == RelationType.CTE
+
+    @property
+    def is_view(self) -> bool:
+        return self.type == RelationType.View
+
+    @classproperty
+    def Table(cls) -> str:
+        return str(RelationType.Table)
+
+    @classproperty
+    def CTE(cls) -> str:
+        return str(RelationType.CTE)
+
+    @classproperty
+    def View(cls) -> str:
+        return str(RelationType.View)
+
+    @classproperty
+    def External(cls) -> str:
+        return str(RelationType.External)
+
+    @classproperty
+    def get_relation_type(cls) -> Type[RelationType]:
+        return RelationType
+
+
+Info = TypeVar("Info", bound="InformationSchema")
+
+
+@dataclass(frozen=True, eq=False, repr=False)
+class InformationSchema(BaseRelation):
+    information_schema_view: Optional[str] = None
+
+    def __post_init__(self):
+        if not isinstance(self.information_schema_view, (type(None), str)):
+            raise dbt.exceptions.CompilationException(
+                "Got an invalid name: {}".format(self.information_schema_view)
+            )
+
+    @classmethod
+    def get_path(cls, relation: BaseRelation, information_schema_view: Optional[str]) -> Path:
+        return Path(
+            database=relation.database,
+            schema=relation.schema,
+            identifier="INFORMATION_SCHEMA",
+        )
+
+    @classmethod
+    def get_include_policy(
+        cls,
+        relation,
+        information_schema_view: Optional[str],
+    ) -> Policy:
+        return relation.include_policy.replace(
+            database=relation.database is not None,
+            schema=False,
+            identifier=True,
+        )
+
+    @classmethod
+    def get_quote_policy(
+        cls,
+        relation,
+        information_schema_view: Optional[str],
+    ) -> Policy:
+        return relation.quote_policy.replace(
+            identifier=False,
+        )
+
+    @classmethod
+    def from_relation(
+        cls: Type[Info],
+        relation: BaseRelation,
+        information_schema_view: Optional[str],
+    ) -> Info:
+        include_policy = cls.get_include_policy(relation, information_schema_view)
+        quote_policy = cls.get_quote_policy(relation, information_schema_view)
+        path = cls.get_path(relation, information_schema_view)
+        return cls(
+            type=RelationType.View,
+            path=path,
+            include_policy=include_policy,
+            quote_policy=quote_policy,
+            information_schema_view=information_schema_view,
+        )
+
+    def _render_iterator(self):
+        for k, v in super()._render_iterator():
+            yield k, v
+        yield None, self.information_schema_view
+
+
+class SchemaSearchMap(Dict[InformationSchema, Set[Optional[str]]]):
+    """A utility class to keep track of what information_schema tables to
+    search for what schemas. The schema values are all lowercased to avoid
+    duplication.
+    """
+
+    def add(self, relation: BaseRelation):
+        key = relation.information_schema_only()
+        if key not in self:
+            self[key] = set()
+        schema: Optional[str] = None
+        if relation.schema is not None:
+            schema = relation.schema.lower()
+        self[key].add(schema)
+
+    def search(self) -> Iterator[Tuple[InformationSchema, Optional[str]]]:
+        for information_schema_name, schemas in self.items():
+            for schema in schemas:
+                yield information_schema_name, schema
+
+    def flatten(self, allow_multiple_databases: bool = False):
+        new = self.__class__()
+
+        # make sure we don't have multiple databases if allow_multiple_databases is set to False
+        if not allow_multiple_databases:
+            seen = {r.database.lower() for r in self if r.database}
+            if len(seen) > 1:
+                dbt.exceptions.raise_compiler_error(str(seen))
+
+        for information_schema_name, schema in self.search():
+            path = {"database": information_schema_name.database, "schema": schema}
+            new.add(
+                information_schema_name.incorporate(
+                    path=path,
+                    quote_policy={"database": False},
+                    include_policy={"database": False},
+                )
+            )
+
+        return new

core/dbt/adapters/cache.py

@@ -0,0 +1,501 @@
+import threading
+from copy import deepcopy
+from typing import Any, Dict, Iterable, List, Optional, Set, Tuple
+
+from dbt.adapters.reference_keys import _make_key, _ReferenceKey
+import dbt.exceptions
+from dbt.events.functions import fire_event
+from dbt.events.types import (
+    AddLink,
+    AddRelation,
+    DropCascade,
+    DropMissingRelation,
+    DropRelation,
+    DumpAfterAddGraph,
+    DumpAfterRenameSchema,
+    DumpBeforeAddGraph,
+    DumpBeforeRenameSchema,
+    RenameSchema,
+    TemporaryRelation,
+    UncachedRelation,
+    UpdateReference,
+)
+from dbt.utils import lowercase
+from dbt.helper_types import Lazy
+
+
+def dot_separated(key: _ReferenceKey) -> str:
+    """Return the key in dot-separated string form.
+
+    :param _ReferenceKey key: The key to stringify.
+    """
+    return ".".join(map(str, key))
+
+
+class _CachedRelation:
+    """Nothing about _CachedRelation is guaranteed to be thread-safe!
+
+    :attr str schema: The schema of this relation.
+    :attr str identifier: The identifier of this relation.
+    :attr Dict[_ReferenceKey, _CachedRelation] referenced_by: The relations
+        that refer to this relation.
+    :attr BaseRelation inner: The underlying dbt relation.
+    """
+
+    def __init__(self, inner):
+        self.referenced_by = {}
+        self.inner = inner
+
+    def __str__(self) -> str:
+        return ("_CachedRelation(database={}, schema={}, identifier={}, inner={})").format(
+            self.database, self.schema, self.identifier, self.inner
+        )
+
+    @property
+    def database(self) -> Optional[str]:
+        return lowercase(self.inner.database)
+
+    @property
+    def schema(self) -> Optional[str]:
+        return lowercase(self.inner.schema)
+
+    @property
+    def identifier(self) -> Optional[str]:
+        return lowercase(self.inner.identifier)
+
+    def __copy__(self):
+        new = self.__class__(self.inner)
+        new.__dict__.update(self.__dict__)
+        return new
+
+    def __deepcopy__(self, memo):
+        new = self.__class__(self.inner.incorporate())
+        new.__dict__.update(self.__dict__)
+        new.referenced_by = deepcopy(self.referenced_by, memo)
+
+    def is_referenced_by(self, key):
+        return key in self.referenced_by
+
+    def key(self):
+        """Get the _ReferenceKey that represents this relation
+
+        :return _ReferenceKey: A key for this relation.
+        """
+        return _make_key(self)
+
+    def add_reference(self, referrer: "_CachedRelation"):
+        """Add a reference from referrer to self, indicating that if this node
+        were drop...cascaded, the referrer would be dropped as well.
+
+        :param _CachedRelation referrer: The node that refers to this node.
+        """
+        self.referenced_by[referrer.key()] = referrer
+
+    def collect_consequences(self):
+        """Recursively collect a set of _ReferenceKeys that would
+        consequentially get dropped if this were dropped via
+        "drop ... cascade".
+
+        :return Set[_ReferenceKey]: All the relations that would be dropped
+        """
+        consequences = {self.key()}
+        for relation in self.referenced_by.values():
+            consequences.update(relation.collect_consequences())
+        return consequences
+
+    def release_references(self, keys):
+        """Non-recursively indicate that an iterable of _ReferenceKey no longer
+        exist. Unknown keys are ignored.
+
+        :param Iterable[_ReferenceKey] keys: The keys to drop.
+        """
+        keys = set(self.referenced_by) & set(keys)
+        for key in keys:
+            self.referenced_by.pop(key)
+
+    def rename(self, new_relation):
+        """Rename this cached relation to new_relation.
+        Note that this will change the output of key(), all refs must be
+        updated!
+
+        :param _CachedRelation new_relation: The new name to apply to the
+            relation
+        """
+        # Relations store this stuff inside their `path` dict. But they
+        # also store a table_name, and usually use it in their  .render(),
+        # so we need to update that as well. It doesn't appear that
+        # table_name is ever anything but the identifier (via .create())
+        self.inner = self.inner.incorporate(
+            path={
+                "database": new_relation.inner.database,
+                "schema": new_relation.inner.schema,
+                "identifier": new_relation.inner.identifier,
+            },
+        )
+
+    def rename_key(self, old_key, new_key):
+        """Rename a reference that may or may not exist. Only handles the
+        reference itself, so this is the other half of what `rename` does.
+
+        If old_key is not in referenced_by, this is a no-op.
+
+        :param _ReferenceKey old_key: The old key to be renamed.
+        :param _ReferenceKey new_key: The new key to rename to.
+        :raises InternalError: If the new key already exists.
+        """
+        if new_key in self.referenced_by:
+            dbt.exceptions.raise_cache_inconsistent(
+                'in rename of "{}" -> "{}", new name is in the cache already'.format(
+                    old_key, new_key
+                )
+            )
+
+        if old_key not in self.referenced_by:
+            return
+        value = self.referenced_by.pop(old_key)
+        self.referenced_by[new_key] = value
+
+    def dump_graph_entry(self):
+        """Return a key/value pair representing this key and its referents.
+
+        return List[str]: The dot-separated form of all referent keys.
+        """
+        return [dot_separated(r) for r in self.referenced_by]
+
+
+class RelationsCache:
+    """A cache of the relations known to dbt. Keeps track of relationships
+    declared between tables and handles renames/drops as a real database would.
+
+    :attr Dict[_ReferenceKey, _CachedRelation] relations: The known relations.
+    :attr threading.RLock lock: The lock around relations, held during updates.
+        The adapters also hold this lock while filling the cache.
+    :attr Set[str] schemas: The set of known/cached schemas, all lowercased.
+    """
+
+    def __init__(self) -> None:
+        self.relations: Dict[_ReferenceKey, _CachedRelation] = {}
+        self.lock = threading.RLock()
+        self.schemas: Set[Tuple[Optional[str], Optional[str]]] = set()
+
+    def add_schema(
+        self,
+        database: Optional[str],
+        schema: Optional[str],
+    ) -> None:
+        """Add a schema to the set of known schemas (case-insensitive)
+
+        :param database: The database name to add.
+        :param schema: The schema name to add.
+        """
+        self.schemas.add((lowercase(database), lowercase(schema)))
+
+    def drop_schema(
+        self,
+        database: Optional[str],
+        schema: Optional[str],
+    ) -> None:
+        """Drop the given schema and remove it from the set of known schemas.
+
+        Then remove all its contents (and their dependents, etc) as well.
+        """
+        key = (lowercase(database), lowercase(schema))
+        if key not in self.schemas:
+            return
+
+        # avoid iterating over self.relations while removing things by
+        # collecting the list first.
+
+        with self.lock:
+            to_remove = self._list_relations_in_schema(database, schema)
+            self._remove_all(to_remove)
+            # handle a drop_schema race by using discard() over remove()
+            self.schemas.discard(key)
+
+    def update_schemas(self, schemas: Iterable[Tuple[Optional[str], str]]):
+        """Add multiple schemas to the set of known schemas (case-insensitive)
+
+        :param schemas: An iterable of the schema names to add.
+        """
+        self.schemas.update((lowercase(d), s.lower()) for (d, s) in schemas)
+
+    def __contains__(self, schema_id: Tuple[Optional[str], str]):
+        """A schema is 'in' the relations cache if it is in the set of cached
+        schemas.
+
+        :param schema_id: The db name and schema name to look up.
+        """
+        db, schema = schema_id
+        return (lowercase(db), schema.lower()) in self.schemas
+
+    def dump_graph(self):
+        """Dump a key-only representation of the schema to a dictionary. Every
+        known relation is a key with a value of a list of keys it is referenced
+        by.
+        """
+        # we have to hold the lock for the entire dump, if other threads modify
+        # self.relations or any cache entry's referenced_by during iteration
+        # it's a runtime error!
+        with self.lock:
+            return {dot_separated(k): v.dump_graph_entry() for k, v in self.relations.items()}
+
+    def _setdefault(self, relation: _CachedRelation):
+        """Add a relation to the cache, or return it if it already exists.
+
+        :param _CachedRelation relation: The relation to set or get.
+        :return _CachedRelation: The relation stored under the given relation's
+            key
+        """
+        self.add_schema(relation.database, relation.schema)
+        key = relation.key()
+        return self.relations.setdefault(key, relation)
+
+    def _add_link(self, referenced_key, dependent_key):
+        """Add a link between two relations to the database. Both the old and
+        new entries must alraedy exist in the database.
+
+        :param _ReferenceKey referenced_key: The key identifying the referenced
+            model (the one that if dropped will drop the dependent model).
+        :param _ReferenceKey dependent_key: The key identifying the dependent
+            model.
+        :raises InternalError: If either entry does not exist.
+        """
+        referenced = self.relations.get(referenced_key)
+        if referenced is None:
+            return
+        if referenced is None:
+            dbt.exceptions.raise_cache_inconsistent(
+                "in add_link, referenced link key {} not in cache!".format(referenced_key)
+            )
+
+        dependent = self.relations.get(dependent_key)
+        if dependent is None:
+            dbt.exceptions.raise_cache_inconsistent(
+                "in add_link, dependent link key {} not in cache!".format(dependent_key)
+            )
+
+        assert dependent is not None  # we just raised!
+
+        referenced.add_reference(dependent)
+
+    # TODO: Is this dead code?  I can't seem to find it grepping the codebase.
+    def add_link(self, referenced, dependent):
+        """Add a link between two relations to the database. If either relation
+        does not exist, it will be added as an "external" relation.
+
+        The dependent model refers _to_ the referenced model. So, given
+        arguments of (jake_test, bar, jake_test, foo):
+        both values are in the schema jake_test and foo is a view that refers
+        to bar, so "drop bar cascade" will drop foo and all of foo's
+        dependents.
+
+        :param BaseRelation referenced: The referenced model.
+        :param BaseRelation dependent: The dependent model.
+        :raises InternalError: If either entry does not exist.
+        """
+        ref_key = _make_key(referenced)
+        dep_key = _make_key(dependent)
+        if (ref_key.database, ref_key.schema) not in self:
+            # if we have not cached the referenced schema at all, we must be
+            # referring to a table outside our control. There's no need to make
+            # a link - we will never drop the referenced relation during a run.
+            fire_event(UncachedRelation(dep_key=dep_key, ref_key=ref_key))
+            return
+        if ref_key not in self.relations:
+            # Insert a dummy "external" relation.
+            referenced = referenced.replace(type=referenced.External)
+            self.add(referenced)
+        if dep_key not in self.relations:
+            # Insert a dummy "external" relation.
+            dependent = dependent.replace(type=referenced.External)
+            self.add(dependent)
+        fire_event(AddLink(dep_key=dep_key, ref_key=ref_key))
+        with self.lock:
+            self._add_link(ref_key, dep_key)
+
+    def add(self, relation):
+        """Add the relation inner to the cache, under the schema schema and
+        identifier identifier
+
+        :param BaseRelation relation: The underlying relation.
+        """
+        cached = _CachedRelation(relation)
+        fire_event(AddRelation(relation=_make_key(cached)))
+        fire_event(DumpBeforeAddGraph(dump=Lazy.defer(lambda: self.dump_graph())))
+
+        with self.lock:
+            self._setdefault(cached)
+        fire_event(DumpAfterAddGraph(dump=Lazy.defer(lambda: self.dump_graph())))
+
+    def _remove_refs(self, keys):
+        """Removes all references to all entries in keys. This does not
+        cascade!
+
+        :param Iterable[_ReferenceKey] keys: The keys to remove.
+        """
+        # remove direct refs
+        for key in keys:
+            del self.relations[key]
+        # then remove all entries from each child
+        for cached in self.relations.values():
+            cached.release_references(keys)
+
+    def _drop_cascade_relation(self, dropped_key):
+        """Drop the given relation and cascade it appropriately to all
+        dependent relations.
+
+        :param _CachedRelation dropped: An existing _CachedRelation to drop.
+        """
+        if dropped_key not in self.relations:
+            fire_event(DropMissingRelation(relation=dropped_key))
+            return
+        consequences = self.relations[dropped_key].collect_consequences()
+        fire_event(DropCascade(dropped=dropped_key, consequences=consequences))
+        self._remove_refs(consequences)
+
+    def drop(self, relation):
+        """Drop the named relation and cascade it appropriately to all
+        dependent relations.
+
+        Because dbt proactively does many `drop relation if exist ... cascade`
+        that are noops, nonexistent relation drops cause a debug log and no
+        other actions.
+
+        :param str schema: The schema of the relation to drop.
+        :param str identifier: The identifier of the relation to drop.
+        """
+        dropped_key = _make_key(relation)
+        fire_event(DropRelation(dropped=dropped_key))
+        with self.lock:
+            self._drop_cascade_relation(dropped_key)
+
+    def _rename_relation(self, old_key, new_relation):
+        """Rename a relation named old_key to new_key, updating references.
+        Return whether or not there was a key to rename.
+
+        :param _ReferenceKey old_key: The existing key, to rename from.
+        :param _CachedRelation new_key: The new relation, to rename to.
+        """
+        # On the database level, a rename updates all values that were
+        # previously referenced by old_name to be referenced by new_name.
+        # basically, the name changes but some underlying ID moves. Kind of
+        # like an object reference!
+        relation = self.relations.pop(old_key)
+        new_key = new_relation.key()
+
+        # relaton has to rename its innards, so it needs the _CachedRelation.
+        relation.rename(new_relation)
+        # update all the relations that refer to it
+        for cached in self.relations.values():
+            if cached.is_referenced_by(old_key):
+                fire_event(
+                    UpdateReference(old_key=old_key, new_key=new_key, cached_key=cached.key())
+                )
+                cached.rename_key(old_key, new_key)
+
+        self.relations[new_key] = relation
+        # also fixup the schemas!
+        self.add_schema(new_key.database, new_key.schema)
+
+        return True
+
+    def _check_rename_constraints(self, old_key, new_key):
+        """Check the rename constraints, and return whether or not the rename
+        can proceed.
+
+        If the new key is already present, that is an error.
+        If the old key is absent, we debug log and return False, assuming it's
+        a temp table being renamed.
+
+        :param _ReferenceKey old_key: The existing key, to rename from.
+        :param _ReferenceKey new_key: The new key, to rename to.
+        :return bool: If the old relation exists for renaming.
+        :raises InternalError: If the new key is already present.
+        """
+        if new_key in self.relations:
+            dbt.exceptions.raise_cache_inconsistent(
+                "in rename, new key {} already in cache: {}".format(
+                    new_key, list(self.relations.keys())
+                )
+            )
+
+        if old_key not in self.relations:
+            fire_event(TemporaryRelation(key=old_key))
+            return False
+        return True
+
+    def rename(self, old, new):
+        """Rename the old schema/identifier to the new schema/identifier and
+        update references.
+
+        If the new schema/identifier is already present, that is an error.
+        If the schema/identifier key is absent, we only debug log and return,
+        assuming it's a temp table being renamed.
+
+        :param BaseRelation old: The existing relation name information.
+        :param BaseRelation new: The new relation name information.
+        :raises InternalError: If the new key is already present.
+        """
+        old_key = _make_key(old)
+        new_key = _make_key(new)
+        fire_event(RenameSchema(old_key=old_key, new_key=new_key))
+
+        fire_event(DumpBeforeRenameSchema(dump=Lazy.defer(lambda: self.dump_graph())))
+
+        with self.lock:
+            if self._check_rename_constraints(old_key, new_key):
+                self._rename_relation(old_key, _CachedRelation(new))
+            else:
+                self._setdefault(_CachedRelation(new))
+
+        fire_event(DumpAfterRenameSchema(dump=Lazy.defer(lambda: self.dump_graph())))
+
+    def get_relations(self, database: Optional[str], schema: Optional[str]) -> List[Any]:
+        """Case-insensitively yield all relations matching the given schema.
+
+        :param str schema: The case-insensitive schema name to list from.
+        :return List[BaseRelation]: The list of relations with the given
+            schema
+        """
+        database = lowercase(database)
+        schema = lowercase(schema)
+        with self.lock:
+            results = [
+                r.inner
+                for r in self.relations.values()
+                if (lowercase(r.schema) == schema and lowercase(r.database) == database)
+            ]
+
+        if None in results:
+            dbt.exceptions.raise_cache_inconsistent(
+                "in get_relations, a None relation was found in the cache!"
+            )
+        return results
+
+    def clear(self):
+        """Clear the cache"""
+        with self.lock:
+            self.relations.clear()
+            self.schemas.clear()
+
+    def _list_relations_in_schema(
+        self, database: Optional[str], schema: Optional[str]
+    ) -> List[_CachedRelation]:
+        """Get the relations in a schema. Callers should hold the lock."""
+        key = (lowercase(database), lowercase(schema))
+
+        to_remove: List[_CachedRelation] = []
+        for cachekey, relation in self.relations.items():
+            if (cachekey.database, cachekey.schema) == key:
+                to_remove.append(relation)
+        return to_remove
+
+    def _remove_all(self, to_remove: List[_CachedRelation]):
+        """Remove all the listed relations. Ignore relations that have been
+        cascaded out.
+        """
+        for relation in to_remove:
+            # it may have been cascaded out already
+            drop_key = _make_key(relation)
+            if drop_key in self.relations:
+                self.drop(drop_key)

core/dbt/adapters/factory.py

@@ -0,0 +1,221 @@
+import threading
+from pathlib import Path
+from importlib import import_module
+from typing import Type, Dict, Any, List, Optional, Set
+
+from dbt.exceptions import RuntimeException, InternalException
+from dbt.include.global_project import (
+    PACKAGE_PATH as GLOBAL_PROJECT_PATH,
+    PROJECT_NAME as GLOBAL_PROJECT_NAME,
+)
+from dbt.events.functions import fire_event
+from dbt.events.types import AdapterImportError, PluginLoadError
+from dbt.contracts.connection import Credentials, AdapterRequiredConfig
+from dbt.adapters.protocol import (
+    AdapterProtocol,
+    AdapterConfig,
+    RelationProtocol,
+)
+from dbt.adapters.base.plugin import AdapterPlugin
+
+
+Adapter = AdapterProtocol
+
+
+class AdapterContainer:
+    def __init__(self):
+        self.lock = threading.Lock()
+        self.adapters: Dict[str, Adapter] = {}
+        self.plugins: Dict[str, AdapterPlugin] = {}
+        # map package names to their include paths
+        self.packages: Dict[str, Path] = {
+            GLOBAL_PROJECT_NAME: Path(GLOBAL_PROJECT_PATH),
+        }
+
+    def get_plugin_by_name(self, name: str) -> AdapterPlugin:
+        with self.lock:
+            if name in self.plugins:
+                return self.plugins[name]
+            names = ", ".join(self.plugins.keys())
+
+        message = f"Invalid adapter type {name}! Must be one of {names}"
+        raise RuntimeException(message)
+
+    def get_adapter_class_by_name(self, name: str) -> Type[Adapter]:
+        plugin = self.get_plugin_by_name(name)
+        return plugin.adapter
+
+    def get_relation_class_by_name(self, name: str) -> Type[RelationProtocol]:
+        adapter = self.get_adapter_class_by_name(name)
+        return adapter.Relation
+
+    def get_config_class_by_name(self, name: str) -> Type[AdapterConfig]:
+        adapter = self.get_adapter_class_by_name(name)
+        return adapter.AdapterSpecificConfigs
+
+    def load_plugin(self, name: str) -> Type[Credentials]:
+        # this doesn't need a lock: in the worst case we'll overwrite packages
+        # and adapter_type entries with the same value, as they're all
+        # singletons
+        try:
+            # mypy doesn't think modules have any attributes.
+            mod: Any = import_module("." + name, "dbt.adapters")
+        except ModuleNotFoundError as exc:
+            # if we failed to import the target module in particular, inform
+            # the user about it via a runtime error
+            if exc.name == "dbt.adapters." + name:
+                fire_event(AdapterImportError(exc=exc))
+                raise RuntimeException(f"Could not find adapter type {name}!")
+            # otherwise, the error had to have come from some underlying
+            # library. Log the stack trace.
+
+            fire_event(PluginLoadError())
+            raise
+        plugin: AdapterPlugin = mod.Plugin
+        plugin_type = plugin.adapter.type()
+
+        if plugin_type != name:
+            raise RuntimeException(
+                f"Expected to find adapter with type named {name}, got "
+                f"adapter with type {plugin_type}"
+            )
+
+        with self.lock:
+            # things do hold the lock to iterate over it so we need it to add
+            self.plugins[name] = plugin
+
+        self.packages[plugin.project_name] = Path(plugin.include_path)
+
+        for dep in plugin.dependencies:
+            self.load_plugin(dep)
+
+        return plugin.credentials
+
+    def register_adapter(self, config: AdapterRequiredConfig) -> None:
+        adapter_name = config.credentials.type
+        adapter_type = self.get_adapter_class_by_name(adapter_name)
+
+        with self.lock:
+            if adapter_name in self.adapters:
+                # this shouldn't really happen...
+                return
+
+            adapter: Adapter = adapter_type(config)  # type: ignore
+            self.adapters[adapter_name] = adapter
+
+    def lookup_adapter(self, adapter_name: str) -> Adapter:
+        return self.adapters[adapter_name]
+
+    def reset_adapters(self):
+        """Clear the adapters. This is useful for tests, which change configs."""
+        with self.lock:
+            for adapter in self.adapters.values():
+                adapter.cleanup_connections()
+            self.adapters.clear()
+
+    def cleanup_connections(self):
+        """Only clean up the adapter connections list without resetting the
+        actual adapters.
+        """
+        with self.lock:
+            for adapter in self.adapters.values():
+                adapter.cleanup_connections()
+
+    def get_adapter_plugins(self, name: Optional[str]) -> List[AdapterPlugin]:
+        """Iterate over the known adapter plugins. If a name is provided,
+        iterate in dependency order over the named plugin and its dependencies.
+        """
+        if name is None:
+            return list(self.plugins.values())
+
+        plugins: List[AdapterPlugin] = []
+        seen: Set[str] = set()
+        plugin_names: List[str] = [name]
+        while plugin_names:
+            plugin_name = plugin_names[0]
+            plugin_names = plugin_names[1:]
+            try:
+                plugin = self.plugins[plugin_name]
+            except KeyError:
+                raise InternalException(f"No plugin found for {plugin_name}") from None
+            plugins.append(plugin)
+            seen.add(plugin_name)
+            if plugin.dependencies is None:
+                continue
+            for dep in plugin.dependencies:
+                if dep not in seen:
+                    plugin_names.append(dep)
+        return plugins
+
+    def get_adapter_package_names(self, name: Optional[str]) -> List[str]:
+        package_names: List[str] = [p.project_name for p in self.get_adapter_plugins(name)]
+        package_names.append(GLOBAL_PROJECT_NAME)
+        return package_names
+
+    def get_include_paths(self, name: Optional[str]) -> List[Path]:
+        paths = []
+        for package_name in self.get_adapter_package_names(name):
+            try:
+                path = self.packages[package_name]
+            except KeyError:
+                raise InternalException(f"No internal package listing found for {package_name}")
+            paths.append(path)
+        return paths
+
+    def get_adapter_type_names(self, name: Optional[str]) -> List[str]:
+        return [p.adapter.type() for p in self.get_adapter_plugins(name)]
+
+
+FACTORY: AdapterContainer = AdapterContainer()
+
+
+def register_adapter(config: AdapterRequiredConfig) -> None:
+    FACTORY.register_adapter(config)
+
+
+def get_adapter(config: AdapterRequiredConfig):
+    return FACTORY.lookup_adapter(config.credentials.type)
+
+
+def get_adapter_by_type(adapter_type):
+    return FACTORY.lookup_adapter(adapter_type)
+
+
+def reset_adapters():
+    """Clear the adapters. This is useful for tests, which change configs."""
+    FACTORY.reset_adapters()
+
+
+def cleanup_connections():
+    """Only clean up the adapter connections list without resetting the actual
+    adapters.
+    """
+    FACTORY.cleanup_connections()
+
+
+def get_adapter_class_by_name(name: str) -> Type[AdapterProtocol]:
+    return FACTORY.get_adapter_class_by_name(name)
+
+
+def get_config_class_by_name(name: str) -> Type[AdapterConfig]:
+    return FACTORY.get_config_class_by_name(name)
+
+
+def get_relation_class_by_name(name: str) -> Type[RelationProtocol]:
+    return FACTORY.get_relation_class_by_name(name)
+
+
+def load_plugin(name: str) -> Type[Credentials]:
+    return FACTORY.load_plugin(name)
+
+
+def get_include_paths(name: Optional[str]) -> List[Path]:
+    return FACTORY.get_include_paths(name)
+
+
+def get_adapter_package_names(name: Optional[str]) -> List[str]:
+    return FACTORY.get_adapter_package_names(name)
+
+
+def get_adapter_type_names(name: Optional[str]) -> List[str]:
+    return FACTORY.get_adapter_type_names(name)

core/dbt/adapters/protocol.py

@@ -0,0 +1,162 @@
+from dataclasses import dataclass
+from typing import (
+    Type,
+    Hashable,
+    Optional,
+    ContextManager,
+    List,
+    Generic,
+    TypeVar,
+    ClassVar,
+    Tuple,
+    Union,
+    Dict,
+    Any,
+)
+from typing_extensions import Protocol
+
+import agate
+
+from dbt.contracts.connection import Connection, AdapterRequiredConfig, AdapterResponse
+from dbt.contracts.graph.compiled import CompiledNode, ManifestNode, NonSourceCompiledNode
+from dbt.contracts.graph.parsed import ParsedNode, ParsedSourceDefinition
+from dbt.contracts.graph.model_config import BaseConfig
+from dbt.contracts.graph.manifest import Manifest
+from dbt.contracts.relation import Policy, HasQuoting
+
+from dbt.graph import Graph
+
+
+@dataclass
+class AdapterConfig(BaseConfig):
+    pass
+
+
+class ConnectionManagerProtocol(Protocol):
+    TYPE: str
+
+
+class ColumnProtocol(Protocol):
+    pass
+
+
+Self = TypeVar("Self", bound="RelationProtocol")
+
+
+class RelationProtocol(Protocol):
+    @classmethod
+    def get_default_quote_policy(cls) -> Policy:
+        ...
+
+    @classmethod
+    def create_from(
+        cls: Type[Self],
+        config: HasQuoting,
+        node: Union[CompiledNode, ParsedNode, ParsedSourceDefinition],
+    ) -> Self:
+        ...
+
+
+class CompilerProtocol(Protocol):
+    def compile(self, manifest: Manifest, write=True) -> Graph:
+        ...
+
+    def compile_node(
+        self,
+        node: ManifestNode,
+        manifest: Manifest,
+        extra_context: Optional[Dict[str, Any]] = None,
+    ) -> NonSourceCompiledNode:
+        ...
+
+
+AdapterConfig_T = TypeVar("AdapterConfig_T", bound=AdapterConfig)
+ConnectionManager_T = TypeVar("ConnectionManager_T", bound=ConnectionManagerProtocol)
+Relation_T = TypeVar("Relation_T", bound=RelationProtocol)
+Column_T = TypeVar("Column_T", bound=ColumnProtocol)
+Compiler_T = TypeVar("Compiler_T", bound=CompilerProtocol)
+
+
+# TODO CT-211
+class AdapterProtocol(  # type: ignore[misc]
+    Protocol,
+    Generic[
+        AdapterConfig_T,
+        ConnectionManager_T,
+        Relation_T,
+        Column_T,
+        Compiler_T,
+    ],
+):
+    AdapterSpecificConfigs: ClassVar[Type[AdapterConfig_T]]
+    Column: ClassVar[Type[Column_T]]
+    Relation: ClassVar[Type[Relation_T]]
+    ConnectionManager: ClassVar[Type[ConnectionManager_T]]
+    connections: ConnectionManager_T
+
+    def __init__(self, config: AdapterRequiredConfig):
+        ...
+
+    @classmethod
+    def type(cls) -> str:
+        pass
+
+    def set_query_header(self, manifest: Manifest) -> None:
+        ...
+
+    @staticmethod
+    def get_thread_identifier() -> Hashable:
+        ...
+
+    def get_thread_connection(self) -> Connection:
+        ...
+
+    def set_thread_connection(self, conn: Connection) -> None:
+        ...
+
+    def get_if_exists(self) -> Optional[Connection]:
+        ...
+
+    def clear_thread_connection(self) -> None:
+        ...
+
+    def clear_transaction(self) -> None:
+        ...
+
+    def exception_handler(self, sql: str) -> ContextManager:
+        ...
+
+    def set_connection_name(self, name: Optional[str] = None) -> Connection:
+        ...
+
+    def cancel_open(self) -> Optional[List[str]]:
+        ...
+
+    def open(cls, connection: Connection) -> Connection:
+        ...
+
+    def release(self) -> None:
+        ...
+
+    def cleanup_all(self) -> None:
+        ...
+
+    def begin(self) -> None:
+        ...
+
+    def commit(self) -> None:
+        ...
+
+    def close(cls, connection: Connection) -> Connection:
+        ...
+
+    def commit_if_has_connection(self) -> None:
+        ...
+
+    def execute(
+        self, sql: str, auto_begin: bool = False, fetch: bool = False
+    ) -> Tuple[AdapterResponse, agate.Table]:
+        ...
+
+    def get_compiler(self) -> Compiler_T:
+        ...

core/dbt/adapters/reference_keys.py

@@ -0,0 +1,24 @@
+# this module exists to resolve circular imports with the events module
+
+from collections import namedtuple
+from typing import Optional
+
+
+_ReferenceKey = namedtuple("_ReferenceKey", "database schema identifier")
+
+
+def lowercase(value: Optional[str]) -> Optional[str]:
+    if value is None:
+        return None
+    else:
+        return value.lower()
+
+
+def _make_key(relation) -> _ReferenceKey:
+    """Make _ReferenceKeys with lowercase values for the cache so we don't have
+    to keep track of quoting
+    """
+    # databases and schemas can both be None
+    return _ReferenceKey(
+        lowercase(relation.database), lowercase(relation.schema), lowercase(relation.identifier)
+    )

core/dbt/adapters/sql/__init__.py

@@ -0,0 +1,3 @@
+# these are all just exports, #noqa them so flake8 will be happy
+from dbt.adapters.sql.connections import SQLConnectionManager  # noqa
+from dbt.adapters.sql.impl import SQLAdapter  # noqa

core/dbt/adapters/sql/connections.py

@@ -0,0 +1,162 @@
+import abc
+import time
+from typing import List, Optional, Tuple, Any, Iterable, Dict
+
+import agate
+
+import dbt.clients.agate_helper
+import dbt.exceptions
+from dbt.adapters.base import BaseConnectionManager
+from dbt.contracts.connection import Connection, ConnectionState, AdapterResponse
+from dbt.events.functions import fire_event
+from dbt.events.types import ConnectionUsed, SQLQuery, SQLCommit, SQLQueryStatus
+
+
+class SQLConnectionManager(BaseConnectionManager):
+    """The default connection manager with some common SQL methods implemented.
+
+    Methods to implement:
+        - exception_handler
+        - cancel
+        - get_response
+        - open
+    """
+
+    @abc.abstractmethod
+    def cancel(self, connection: Connection):
+        """Cancel the given connection."""
+        raise dbt.exceptions.NotImplementedException(
+            "`cancel` is not implemented for this adapter!"
+        )
+
+    def cancel_open(self) -> List[str]:
+        names = []
+        this_connection = self.get_if_exists()
+        with self.lock:
+            for connection in self.thread_connections.values():
+                if connection is this_connection:
+                    continue
+
+                # if the connection failed, the handle will be None so we have
+                # nothing to cancel.
+                if connection.handle is not None and connection.state == ConnectionState.OPEN:
+                    self.cancel(connection)
+                if connection.name is not None:
+                    names.append(connection.name)
+        return names
+
+    def add_query(
+        self,
+        sql: str,
+        auto_begin: bool = True,
+        bindings: Optional[Any] = None,
+        abridge_sql_log: bool = False,
+    ) -> Tuple[Connection, Any]:
+        connection = self.get_thread_connection()
+        if auto_begin and connection.transaction_open is False:
+            self.begin()
+        fire_event(ConnectionUsed(conn_type=self.TYPE, conn_name=connection.name))
+
+        with self.exception_handler(sql):
+            if abridge_sql_log:
+                log_sql = "{}...".format(sql[:512])
+            else:
+                log_sql = sql
+
+            fire_event(SQLQuery(conn_name=connection.name, sql=log_sql))
+            pre = time.time()
+
+            cursor = connection.handle.cursor()
+            cursor.execute(sql, bindings)
+
+            fire_event(
+                SQLQueryStatus(
+                    status=str(self.get_response(cursor)), elapsed=round((time.time() - pre), 2)
+                )
+            )
+
+            return connection, cursor
+
+    @abc.abstractclassmethod
+    def get_response(cls, cursor: Any) -> AdapterResponse:
+        """Get the status of the cursor."""
+        raise dbt.exceptions.NotImplementedException(
+            "`get_response` is not implemented for this adapter!"
+        )
+
+    @classmethod
+    def process_results(
+        cls, column_names: Iterable[str], rows: Iterable[Any]
+    ) -> List[Dict[str, Any]]:
+        # TODO CT-211
+        unique_col_names = dict()  # type: ignore[var-annotated]
+        # TODO CT-211
+        for idx in range(len(column_names)):  # type: ignore[arg-type]
+            # TODO CT-211
+            col_name = column_names[idx]  # type: ignore[index]
+            if col_name in unique_col_names:
+                unique_col_names[col_name] += 1
+                # TODO CT-211
+                column_names[idx] = f"{col_name}_{unique_col_names[col_name]}"  # type: ignore[index] # noqa
+            else:
+                # TODO CT-211
+                unique_col_names[column_names[idx]] = 1  # type: ignore[index]
+        return [dict(zip(column_names, row)) for row in rows]
+
+    @classmethod
+    def get_result_from_cursor(cls, cursor: Any) -> agate.Table:
+        data: List[Any] = []
+        column_names: List[str] = []
+
+        if cursor.description is not None:
+            column_names = [col[0] for col in cursor.description]
+            rows = cursor.fetchall()
+            data = cls.process_results(column_names, rows)
+
+        return dbt.clients.agate_helper.table_from_data_flat(data, column_names)
+
+    def execute(
+        self, sql: str, auto_begin: bool = False, fetch: bool = False
+    ) -> Tuple[AdapterResponse, agate.Table]:
+        sql = self._add_query_comment(sql)
+        _, cursor = self.add_query(sql, auto_begin)
+        response = self.get_response(cursor)
+        if fetch:
+            table = self.get_result_from_cursor(cursor)
+        else:
+            table = dbt.clients.agate_helper.empty_table()
+        return response, table
+
+    def add_begin_query(self):
+        return self.add_query("BEGIN", auto_begin=False)
+
+    def add_commit_query(self):
+        return self.add_query("COMMIT", auto_begin=False)
+
+    def begin(self):
+        connection = self.get_thread_connection()
+        if connection.transaction_open is True:
+            raise dbt.exceptions.InternalException(
+                'Tried to begin a new transaction on connection "{}", but '
+                "it already had one open!".format(connection.name)
+            )
+
+        self.add_begin_query()
+
+        connection.transaction_open = True
+        return connection
+
+    def commit(self):
+        connection = self.get_thread_connection()
+        if connection.transaction_open is False:
+            raise dbt.exceptions.InternalException(
+                'Tried to commit transaction on connection "{}", but '
+                "it does not have one open!".format(connection.name)
+            )
+
+        fire_event(SQLCommit(conn_name=connection.name))
+        self.add_commit_query()
+
+        connection.transaction_open = False
+
+        return connection

core/dbt/adapters/sql/impl.py

@@ -0,0 +1,242 @@
+import agate
+from typing import Any, Optional, Tuple, Type, List
+
+import dbt.clients.agate_helper
+from dbt.contracts.connection import Connection
+import dbt.exceptions
+from dbt.adapters.base import BaseAdapter, available
+from dbt.adapters.cache import _make_key
+from dbt.adapters.sql import SQLConnectionManager
+from dbt.events.functions import fire_event
+from dbt.events.types import ColTypeChange, SchemaCreation, SchemaDrop
+
+
+from dbt.adapters.base.relation import BaseRelation
+
+LIST_RELATIONS_MACRO_NAME = "list_relations_without_caching"
+GET_COLUMNS_IN_RELATION_MACRO_NAME = "get_columns_in_relation"
+LIST_SCHEMAS_MACRO_NAME = "list_schemas"
+CHECK_SCHEMA_EXISTS_MACRO_NAME = "check_schema_exists"
+CREATE_SCHEMA_MACRO_NAME = "create_schema"
+DROP_SCHEMA_MACRO_NAME = "drop_schema"
+RENAME_RELATION_MACRO_NAME = "rename_relation"
+TRUNCATE_RELATION_MACRO_NAME = "truncate_relation"
+DROP_RELATION_MACRO_NAME = "drop_relation"
+ALTER_COLUMN_TYPE_MACRO_NAME = "alter_column_type"
+
+
+class SQLAdapter(BaseAdapter):
+    """The default adapter with the common agate conversions and some SQL
+    methods was implemented. This adapter has a different much shorter list of
+    methods to implement, but some more macros that must be implemented.
+
+    To implement a macro, implement "${adapter_type}__${macro_name}". in the
+    adapter's internal project.
+
+    Methods to implement:
+        - date_function
+
+    Macros to implement:
+        - get_catalog
+        - list_relations_without_caching
+        - get_columns_in_relation
+    """
+
+    ConnectionManager: Type[SQLConnectionManager]
+    connections: SQLConnectionManager
+
+    @available.parse(lambda *a, **k: (None, None))
+    def add_query(
+        self,
+        sql: str,
+        auto_begin: bool = True,
+        bindings: Optional[Any] = None,
+        abridge_sql_log: bool = False,
+    ) -> Tuple[Connection, Any]:
+        """Add a query to the current transaction. A thin wrapper around
+        ConnectionManager.add_query.
+
+        :param sql: The SQL query to add
+        :param auto_begin: If set and there is no transaction in progress,
+            begin a new one.
+        :param bindings: An optional list of bindings for the query.
+        :param abridge_sql_log: If set, limit the raw sql logged to 512
+            characters
+        """
+        return self.connections.add_query(sql, auto_begin, bindings, abridge_sql_log)
+
+    @classmethod
+    def convert_text_type(cls, agate_table: agate.Table, col_idx: int) -> str:
+        return "text"
+
+    @classmethod
+    def convert_number_type(cls, agate_table: agate.Table, col_idx: int) -> str:
+        # TODO CT-211
+        decimals = agate_table.aggregate(agate.MaxPrecision(col_idx))  # type: ignore[attr-defined]
+        return "float8" if decimals else "integer"
+
+    @classmethod
+    def convert_boolean_type(cls, agate_table: agate.Table, col_idx: int) -> str:
+        return "boolean"
+
+    @classmethod
+    def convert_datetime_type(cls, agate_table: agate.Table, col_idx: int) -> str:
+        return "timestamp without time zone"
+
+    @classmethod
+    def convert_date_type(cls, agate_table: agate.Table, col_idx: int) -> str:
+        return "date"
+
+    @classmethod
+    def convert_time_type(cls, agate_table: agate.Table, col_idx: int) -> str:
+        return "time"
+
+    @classmethod
+    def is_cancelable(cls) -> bool:
+        return True
+
+    def expand_column_types(self, goal, current):
+        reference_columns = {c.name: c for c in self.get_columns_in_relation(goal)}
+
+        target_columns = {c.name: c for c in self.get_columns_in_relation(current)}
+
+        for column_name, reference_column in reference_columns.items():
+            target_column = target_columns.get(column_name)
+
+            if target_column is not None and target_column.can_expand_to(reference_column):
+                col_string_size = reference_column.string_size()
+                new_type = self.Column.string_type(col_string_size)
+                fire_event(
+                    ColTypeChange(
+                        orig_type=target_column.data_type,
+                        new_type=new_type,
+                        table=_make_key(current),
+                    )
+                )
+
+                self.alter_column_type(current, column_name, new_type)
+
+    def alter_column_type(self, relation, column_name, new_column_type) -> None:
+        """
+        1. Create a new column (w/ temp name and correct type)
+        2. Copy data over to it
+        3. Drop the existing column (cascade!)
+        4. Rename the new column to existing column
+        """
+        kwargs = {
+            "relation": relation,
+            "column_name": column_name,
+            "new_column_type": new_column_type,
+        }
+        self.execute_macro(ALTER_COLUMN_TYPE_MACRO_NAME, kwargs=kwargs)
+
+    def drop_relation(self, relation):
+        if relation.type is None:
+            dbt.exceptions.raise_compiler_error(
+                "Tried to drop relation {}, but its type is null.".format(relation)
+            )
+
+        self.cache_dropped(relation)
+        self.execute_macro(DROP_RELATION_MACRO_NAME, kwargs={"relation": relation})
+
+    def truncate_relation(self, relation):
+        self.execute_macro(TRUNCATE_RELATION_MACRO_NAME, kwargs={"relation": relation})
+
+    def rename_relation(self, from_relation, to_relation):
+        self.cache_renamed(from_relation, to_relation)
+
+        kwargs = {"from_relation": from_relation, "to_relation": to_relation}
+        self.execute_macro(RENAME_RELATION_MACRO_NAME, kwargs=kwargs)
+
+    def get_columns_in_relation(self, relation):
+        return self.execute_macro(
+            GET_COLUMNS_IN_RELATION_MACRO_NAME, kwargs={"relation": relation}
+        )
+
+    def create_schema(self, relation: BaseRelation) -> None:
+        relation = relation.without_identifier()
+        fire_event(SchemaCreation(relation=_make_key(relation)))
+        kwargs = {
+            "relation": relation,
+        }
+        self.execute_macro(CREATE_SCHEMA_MACRO_NAME, kwargs=kwargs)
+        self.commit_if_has_connection()
+        # we can't update the cache here, as if the schema already existed we
+        # don't want to (incorrectly) say that it's empty
+
+    def drop_schema(self, relation: BaseRelation) -> None:
+        relation = relation.without_identifier()
+        fire_event(SchemaDrop(relation=_make_key(relation)))
+        kwargs = {
+            "relation": relation,
+        }
+        self.execute_macro(DROP_SCHEMA_MACRO_NAME, kwargs=kwargs)
+        # we can update the cache here
+        self.cache.drop_schema(relation.database, relation.schema)
+
+    def list_relations_without_caching(
+        self,
+        schema_relation: BaseRelation,
+    ) -> List[BaseRelation]:
+        kwargs = {"schema_relation": schema_relation}
+        results = self.execute_macro(LIST_RELATIONS_MACRO_NAME, kwargs=kwargs)
+
+        relations = []
+        quote_policy = {"database": True, "schema": True, "identifier": True}
+        for _database, name, _schema, _type in results:
+            try:
+                _type = self.Relation.get_relation_type(_type)
+            except ValueError:
+                _type = self.Relation.External
+            relations.append(
+                self.Relation.create(
+                    database=_database,
+                    schema=_schema,
+                    identifier=name,
+                    quote_policy=quote_policy,
+                    type=_type,
+                )
+            )
+        return relations
+
+    def quote(self, identifier):
+        return '"{}"'.format(identifier)
+
+    def list_schemas(self, database: str) -> List[str]:
+        results = self.execute_macro(LIST_SCHEMAS_MACRO_NAME, kwargs={"database": database})
+
+        return [row[0] for row in results]
+
+    def check_schema_exists(self, database: str, schema: str) -> bool:
+        information_schema = self.Relation.create(
+            database=database,
+            schema=schema,
+            identifier="INFORMATION_SCHEMA",
+            quote_policy=self.config.quoting,
+        ).information_schema()
+
+        kwargs = {"information_schema": information_schema, "schema": schema}
+        results = self.execute_macro(CHECK_SCHEMA_EXISTS_MACRO_NAME, kwargs=kwargs)
+        return results[0][0] > 0
+
+    # This is for use in the test suite
+    def run_sql_for_tests(self, sql, fetch, conn):
+        cursor = conn.handle.cursor()
+        try:
+            cursor.execute(sql)
+            if hasattr(conn.handle, "commit"):
+                conn.handle.commit()
+            if fetch == "one":
+                return cursor.fetchone()
+            elif fetch == "all":
+                return cursor.fetchall()
+            else:
+                return
+        except BaseException as e:
+            if conn.handle and not getattr(conn.handle, "closed", True):
+                conn.handle.rollback()
+            print(sql)
+            print(e)
+            raise
+        finally:
+            conn.transaction_open = False

core/dbt/clients/README.md

@@ -0,0 +1 @@
+# Clients README

core/dbt/clients/_jinja_blocks.py

@@ -0,0 +1,383 @@
+import re
+from collections import namedtuple
+
+import dbt.exceptions
+
+
+def regex(pat):
+    return re.compile(pat, re.DOTALL | re.MULTILINE)
+
+
+class BlockData:
+    """raw plaintext data from the top level of the file."""
+
+    def __init__(self, contents):
+        self.block_type_name = "__dbt__data"
+        self.contents = contents
+        self.full_block = contents
+
+
+class BlockTag:
+    def __init__(self, block_type_name, block_name, contents=None, full_block=None, **kw):
+        self.block_type_name = block_type_name
+        self.block_name = block_name
+        self.contents = contents
+        self.full_block = full_block
+
+    def __str__(self):
+        return "BlockTag({!r}, {!r})".format(self.block_type_name, self.block_name)
+
+    def __repr__(self):
+        return str(self)
+
+    @property
+    def end_block_type_name(self):
+        return "end{}".format(self.block_type_name)
+
+    def end_pat(self):
+        # we don't want to use string formatting here because jinja uses most
+        # of the string formatting operators in its syntax...
+        pattern = "".join(
+            (
+                r"(?P<endblock>((?:\s*\{\%\-|\{\%)\s*",
+                self.end_block_type_name,
+                r"\s*(?:\-\%\}\s*|\%\})))",
+            )
+        )
+        return regex(pattern)
+
+
+Tag = namedtuple("Tag", "block_type_name block_name start end")
+
+
+_NAME_PATTERN = r"[A-Za-z_][A-Za-z_0-9]*"
+
+COMMENT_START_PATTERN = regex(r"(?:(?P<comment_start>(\s*\{\#)))")
+COMMENT_END_PATTERN = regex(r"(.*?)(\s*\#\})")
+RAW_START_PATTERN = regex(r"(?:\s*\{\%\-|\{\%)\s*(?P<raw_start>(raw))\s*(?:\-\%\}\s*|\%\})")
+EXPR_START_PATTERN = regex(r"(?P<expr_start>(\{\{\s*))")
+EXPR_END_PATTERN = regex(r"(?P<expr_end>(\s*\}\}))")
+
+BLOCK_START_PATTERN = regex(
+    "".join(
+        (
+            r"(?:\s*\{\%\-|\{\%)\s*",
+            r"(?P<block_type_name>({}))".format(_NAME_PATTERN),
+            # some blocks have a 'block name'.
+            r"(?:\s+(?P<block_name>({})))?".format(_NAME_PATTERN),
+        )
+    )
+)
+
+
+RAW_BLOCK_PATTERN = regex(
+    "".join(
+        (
+            r"(?:\s*\{\%\-|\{\%)\s*raw\s*(?:\-\%\}\s*|\%\})",
+            r"(?:.*?)",
+            r"(?:\s*\{\%\-|\{\%)\s*endraw\s*(?:\-\%\}\s*|\%\})",
+        )
+    )
+)
+
+TAG_CLOSE_PATTERN = regex(r"(?:(?P<tag_close>(\-\%\}\s*|\%\})))")
+
+# stolen from jinja's lexer. Note that we've consumed all prefix whitespace by
+# the time we want to use this.
+STRING_PATTERN = regex(r"(?P<string>('([^'\\]*(?:\\.[^'\\]*)*)'|" r'"([^"\\]*(?:\\.[^"\\]*)*)"))')
+
+QUOTE_START_PATTERN = regex(r"""(?P<quote>(['"]))""")
+
+
+class TagIterator:
+    def __init__(self, data):
+        self.data = data
+        self.blocks = []
+        self._parenthesis_stack = []
+        self.pos = 0
+
+    def linepos(self, end=None) -> str:
+        """Given an absolute position in the input data, return a pair of
+        line number + relative position to the start of the line.
+        """
+        end_val: int = self.pos if end is None else end
+        data = self.data[:end_val]
+        # if not found, rfind returns -1, and -1+1=0, which is perfect!
+        last_line_start = data.rfind("\n") + 1
+        # it's easy to forget this, but line numbers are 1-indexed
+        line_number = data.count("\n") + 1
+        return f"{line_number}:{end_val - last_line_start}"
+
+    def advance(self, new_position):
+        self.pos = new_position
+
+    def rewind(self, amount=1):
+        self.pos -= amount
+
+    def _search(self, pattern):
+        return pattern.search(self.data, self.pos)
+
+    def _match(self, pattern):
+        return pattern.match(self.data, self.pos)
+
+    def _first_match(self, *patterns, **kwargs):
+        matches = []
+        for pattern in patterns:
+            # default to 'search', but sometimes we want to 'match'.
+            if kwargs.get("method", "search") == "search":
+                match = self._search(pattern)
+            else:
+                match = self._match(pattern)
+            if match:
+                matches.append(match)
+        if not matches:
+            return None
+        # if there are multiple matches, pick the least greedy match
+        # TODO: do I need to account for m.start(), or is this ok?
+        return min(matches, key=lambda m: m.end())
+
+    def _expect_match(self, expected_name, *patterns, **kwargs):
+        match = self._first_match(*patterns, **kwargs)
+        if match is None:
+            msg = 'unexpected EOF, expected {}, got "{}"'.format(
+                expected_name, self.data[self.pos :]
+            )
+            dbt.exceptions.raise_compiler_error(msg)
+        return match
+
+    def handle_expr(self, match):
+        """Handle an expression. At this point we're at a string like:
+            {{ 1 + 2 }}
+            ^ right here
+
+        And the match contains "{{ "
+
+        We expect to find a `}}`, but we might find one in a string before
+        that. Imagine the case of `{{ 2 * "}}" }}`...
+
+        You're not allowed to have blocks or comments inside an expr so it is
+        pretty straightforward, I hope: only strings can get in the way.
+        """
+        self.advance(match.end())
+        while True:
+            match = self._expect_match("}}", EXPR_END_PATTERN, QUOTE_START_PATTERN)
+            if match.groupdict().get("expr_end") is not None:
+                break
+            else:
+                # it's a quote. we haven't advanced for this match yet, so
+                # just slurp up the whole string, no need to rewind.
+                match = self._expect_match("string", STRING_PATTERN)
+                self.advance(match.end())
+
+        self.advance(match.end())
+
+    def handle_comment(self, match):
+        self.advance(match.end())
+        match = self._expect_match("#}", COMMENT_END_PATTERN)
+        self.advance(match.end())
+
+    def _expect_block_close(self):
+        """Search for the tag close marker.
+        To the right of the type name, there are a few possiblities:
+           - a name (handled by the regex's 'block_name')
+           - any number of: `=`, `(`, `)`, strings, etc (arguments)
+           - nothing
+
+        followed eventually by a %}
+
+        So the only characters we actually have to worry about in this context
+        are quote and `%}` - nothing else can hide the %} and be valid jinja.
+        """
+        while True:
+            end_match = self._expect_match(
+                'tag close ("%}")', QUOTE_START_PATTERN, TAG_CLOSE_PATTERN
+            )
+            self.advance(end_match.end())
+            if end_match.groupdict().get("tag_close") is not None:
+                return
+            # must be a string. Rewind to its start and advance past it.
+            self.rewind()
+            string_match = self._expect_match("string", STRING_PATTERN)
+            self.advance(string_match.end())
+
+    def handle_raw(self):
+        # raw blocks are super special, they are a single complete regex
+        match = self._expect_match("{% raw %}...{% endraw %}", RAW_BLOCK_PATTERN)
+        self.advance(match.end())
+        return match.end()
+
+    def handle_tag(self, match):
+        """The tag could be one of a few things:
+
+            {% mytag %}
+            {% mytag x = y %}
+            {% mytag x = "y" %}
+            {% mytag x.y() %}
+            {% mytag foo("a", "b", c="d") %}
+
+        But the key here is that it's always going to be `{% mytag`!
+        """
+        groups = match.groupdict()
+        # always a value
+        block_type_name = groups["block_type_name"]
+        # might be None
+        block_name = groups.get("block_name")
+        start_pos = self.pos
+        if block_type_name == "raw":
+            match = self._expect_match("{% raw %}...{% endraw %}", RAW_BLOCK_PATTERN)
+            self.advance(match.end())
+        else:
+            self.advance(match.end())
+            self._expect_block_close()
+        return Tag(
+            block_type_name=block_type_name, block_name=block_name, start=start_pos, end=self.pos
+        )
+
+    def find_tags(self):
+        while True:
+            match = self._first_match(
+                BLOCK_START_PATTERN, COMMENT_START_PATTERN, EXPR_START_PATTERN
+            )
+            if match is None:
+                break
+
+            self.advance(match.start())
+            # start = self.pos
+
+            groups = match.groupdict()
+            comment_start = groups.get("comment_start")
+            expr_start = groups.get("expr_start")
+            block_type_name = groups.get("block_type_name")
+
+            if comment_start is not None:
+                self.handle_comment(match)
+            elif expr_start is not None:
+                self.handle_expr(match)
+            elif block_type_name is not None:
+                yield self.handle_tag(match)
+            else:
+                raise dbt.exceptions.InternalException(
+                    "Invalid regex match in next_block, expected block start, "
+                    "expr start, or comment start"
+                )
+
+    def __iter__(self):
+        return self.find_tags()
+
+
+duplicate_tags = (
+    "Got nested tags: {outer.block_type_name} (started at {outer.start}) did "
+    "not have a matching {{% end{outer.block_type_name} %}} before a "
+    "subsequent {inner.block_type_name} was found (started at {inner.start})"
+)
+
+
+_CONTROL_FLOW_TAGS = {
+    "if": "endif",
+    "for": "endfor",
+}
+
+_CONTROL_FLOW_END_TAGS = {v: k for k, v in _CONTROL_FLOW_TAGS.items()}
+
+
+class BlockIterator:
+    def __init__(self, data):
+        self.tag_parser = TagIterator(data)
+        self.current = None
+        self.stack = []
+        self.last_position = 0
+
+    @property
+    def current_end(self):
+        if self.current is None:
+            return 0
+        else:
+            return self.current.end
+
+    @property
+    def data(self):
+        return self.tag_parser.data
+
+    def is_current_end(self, tag):
+        return (
+            tag.block_type_name.startswith("end")
+            and self.current is not None
+            and tag.block_type_name[3:] == self.current.block_type_name
+        )
+
+    def find_blocks(self, allowed_blocks=None, collect_raw_data=True):
+        """Find all top-level blocks in the data."""
+        if allowed_blocks is None:
+            allowed_blocks = {"snapshot", "macro", "materialization", "docs"}
+
+        for tag in self.tag_parser.find_tags():
+            if tag.block_type_name in _CONTROL_FLOW_TAGS:
+                self.stack.append(tag.block_type_name)
+            elif tag.block_type_name in _CONTROL_FLOW_END_TAGS:
+                found = None
+                if self.stack:
+                    found = self.stack.pop()
+                else:
+                    expected = _CONTROL_FLOW_END_TAGS[tag.block_type_name]
+                    dbt.exceptions.raise_compiler_error(
+                        (
+                            "Got an unexpected control flow end tag, got {} but "
+                            "never saw a preceeding {} (@ {})"
+                        ).format(tag.block_type_name, expected, self.tag_parser.linepos(tag.start))
+                    )
+                expected = _CONTROL_FLOW_TAGS[found]
+                if expected != tag.block_type_name:
+                    dbt.exceptions.raise_compiler_error(
+                        (
+                            "Got an unexpected control flow end tag, got {} but "
+                            "expected {} next (@ {})"
+                        ).format(tag.block_type_name, expected, self.tag_parser.linepos(tag.start))
+                    )
+
+            if tag.block_type_name in allowed_blocks:
+                if self.stack:
+                    dbt.exceptions.raise_compiler_error(
+                        (
+                            "Got a block definition inside control flow at {}. "
+                            "All dbt block definitions must be at the top level"
+                        ).format(self.tag_parser.linepos(tag.start))
+                    )
+                if self.current is not None:
+                    dbt.exceptions.raise_compiler_error(
+                        duplicate_tags.format(outer=self.current, inner=tag)
+                    )
+                if collect_raw_data:
+                    raw_data = self.data[self.last_position : tag.start]
+                    self.last_position = tag.start
+                    if raw_data:
+                        yield BlockData(raw_data)
+                self.current = tag
+
+            elif self.is_current_end(tag):
+                self.last_position = tag.end
+                assert self.current is not None
+                yield BlockTag(
+                    block_type_name=self.current.block_type_name,
+                    block_name=self.current.block_name,
+                    contents=self.data[self.current.end : tag.start],
+                    full_block=self.data[self.current.start : tag.end],
+                )
+                self.current = None
+
+        if self.current:
+            linecount = self.data[: self.current.end].count("\n") + 1
+            dbt.exceptions.raise_compiler_error(
+                (
+                    "Reached EOF without finding a close tag for " "{} (searched from line {})"
+                ).format(self.current.block_type_name, linecount)
+            )
+
+        if collect_raw_data:
+            raw_data = self.data[self.last_position :]
+            if raw_data:
+                yield BlockData(raw_data)
+
+    def lex_for_blocks(self, allowed_blocks=None, collect_raw_data=True):
+        return list(
+            self.find_blocks(allowed_blocks=allowed_blocks, collect_raw_data=collect_raw_data)
+        )

core/dbt/clients/agate_helper.py

@@ -0,0 +1,220 @@
+from codecs import BOM_UTF8
+
+import agate
+import datetime
+import isodate
+import json
+import dbt.utils
+from typing import Iterable, List, Dict, Union, Optional, Any
+
+from dbt.exceptions import RuntimeException
+
+
+BOM = BOM_UTF8.decode("utf-8")  # '\ufeff'
+
+
+class Number(agate.data_types.Number):
+    # undo the change in https://github.com/wireservice/agate/pull/733
+    # i.e. do not cast True and False to numeric 1 and 0
+    def cast(self, d):
+        if type(d) == bool:
+            raise agate.exceptions.CastError("Do not cast True to 1 or False to 0.")
+        else:
+            return super().cast(d)
+
+
+class ISODateTime(agate.data_types.DateTime):
+    def cast(self, d):
+        # this is agate.data_types.DateTime.cast with the "clever" bits removed
+        # so we only handle ISO8601 stuff
+        if isinstance(d, datetime.datetime) or d is None:
+            return d
+        elif isinstance(d, datetime.date):
+            return datetime.datetime.combine(d, datetime.time(0, 0, 0))
+        elif isinstance(d, str):
+            d = d.strip()
+            if d.lower() in self.null_values:
+                return None
+        try:
+            return isodate.parse_datetime(d)
+        except:  # noqa
+            pass
+
+        raise agate.exceptions.CastError('Can not parse value "%s" as datetime.' % d)
+
+
+def build_type_tester(
+    text_columns: Iterable[str], string_null_values: Optional[Iterable[str]] = ("null", "")
+) -> agate.TypeTester:
+
+    types = [
+        Number(null_values=("null", "")),
+        agate.data_types.Date(null_values=("null", ""), date_format="%Y-%m-%d"),
+        agate.data_types.DateTime(null_values=("null", ""), datetime_format="%Y-%m-%d %H:%M:%S"),
+        ISODateTime(null_values=("null", "")),
+        agate.data_types.Boolean(
+            true_values=("true",), false_values=("false",), null_values=("null", "")
+        ),
+        agate.data_types.Text(null_values=string_null_values),
+    ]
+    force = {k: agate.data_types.Text(null_values=string_null_values) for k in text_columns}
+    return agate.TypeTester(force=force, types=types)
+
+
+DEFAULT_TYPE_TESTER = build_type_tester(())
+
+
+def table_from_rows(
+    rows: List[Any],
+    column_names: Iterable[str],
+    text_only_columns: Optional[Iterable[str]] = None,
+) -> agate.Table:
+    if text_only_columns is None:
+        column_types = DEFAULT_TYPE_TESTER
+    else:
+        # If text_only_columns are present, prevent coercing empty string or
+        # literal 'null' strings to a None representation.
+        column_types = build_type_tester(text_only_columns, string_null_values=())
+
+    return agate.Table(rows, column_names, column_types=column_types)
+
+
+def table_from_data(data, column_names: Iterable[str]) -> agate.Table:
+    "Convert a list of dictionaries into an Agate table"
+
+    # The agate table is generated from a list of dicts, so the column order
+    # from `data` is not preserved. We can use `select` to reorder the columns
+    #
+    # If there is no data, create an empty table with the specified columns
+
+    if len(data) == 0:
+        return agate.Table([], column_names=column_names)
+    else:
+        table = agate.Table.from_object(data, column_types=DEFAULT_TYPE_TESTER)
+        return table.select(column_names)
+
+
+def table_from_data_flat(data, column_names: Iterable[str]) -> agate.Table:
+    """
+    Convert a list of dictionaries into an Agate table. This method does not
+    coerce string values into more specific types (eg. '005' will not be
+    coerced to '5'). Additionally, this method does not coerce values to
+    None (eg. '' or 'null' will retain their string literal representations).
+    """
+
+    rows = []
+    text_only_columns = set()
+    for _row in data:
+        row = []
+        for col_name in column_names:
+            value = _row[col_name]
+            if isinstance(value, (dict, list, tuple)):
+                # Represent container types as json strings
+                value = json.dumps(value, cls=dbt.utils.JSONEncoder)
+                text_only_columns.add(col_name)
+            elif isinstance(value, str):
+                text_only_columns.add(col_name)
+            row.append(value)
+
+        rows.append(row)
+
+    return table_from_rows(
+        rows=rows, column_names=column_names, text_only_columns=text_only_columns
+    )
+
+
+def empty_table():
+    "Returns an empty Agate table. To be used in place of None"
+
+    return agate.Table(rows=[])
+
+
+def as_matrix(table):
+    "Return an agate table as a matrix of data sans columns"
+
+    return [r.values() for r in table.rows.values()]
+
+
+def from_csv(abspath, text_columns):
+    type_tester = build_type_tester(text_columns=text_columns)
+    with open(abspath, encoding="utf-8") as fp:
+        if fp.read(1) != BOM:
+            fp.seek(0)
+        return agate.Table.from_csv(fp, column_types=type_tester)
+
+
+class _NullMarker:
+    pass
+
+
+NullableAgateType = Union[agate.data_types.DataType, _NullMarker]
+
+
+class ColumnTypeBuilder(Dict[str, NullableAgateType]):
+    def __init__(self):
+        super().__init__()
+
+    def __setitem__(self, key, value):
+        if key not in self:
+            super().__setitem__(key, value)
+            return
+
+        existing_type = self[key]
+        if isinstance(existing_type, _NullMarker):
+            # overwrite
+            super().__setitem__(key, value)
+        elif isinstance(value, _NullMarker):
+            # use the existing value
+            return
+        elif not isinstance(value, type(existing_type)):
+            # actual type mismatch!
+            raise RuntimeException(
+                f"Tables contain columns with the same names ({key}), "
+                f"but different types ({value} vs {existing_type})"
+            )
+
+    def finalize(self) -> Dict[str, agate.data_types.DataType]:
+        result: Dict[str, agate.data_types.DataType] = {}
+        for key, value in self.items():
+            if isinstance(value, _NullMarker):
+                # this is what agate would do.
+                result[key] = agate.data_types.Number()
+            else:
+                result[key] = value
+        return result
+
+
+def _merged_column_types(tables: List[agate.Table]) -> Dict[str, agate.data_types.DataType]:
+    # this is a lot like agate.Table.merge, but with handling for all-null
+    # rows being "any type".
+    new_columns: ColumnTypeBuilder = ColumnTypeBuilder()
+    for table in tables:
+        for i in range(len(table.columns)):
+            column_name: str = table.column_names[i]
+            column_type: NullableAgateType = table.column_types[i]
+            # avoid over-sensitive type inference
+            if all(x is None for x in table.columns[column_name]):
+                column_type = _NullMarker()
+            new_columns[column_name] = column_type
+
+    return new_columns.finalize()
+
+
+def merge_tables(tables: List[agate.Table]) -> agate.Table:
+    """This is similar to agate.Table.merge, but it handles rows of all 'null'
+    values more gracefully during merges.
+    """
+    new_columns = _merged_column_types(tables)
+    column_names = tuple(new_columns.keys())
+    column_types = tuple(new_columns.values())
+
+    rows: List[agate.Row] = []
+    for table in tables:
+        if table.column_names == column_names and table.column_types == column_types:
+            rows.extend(table.rows)
+        else:
+            for row in table.rows:
+                data = [row.get(name, None) for name in column_names]
+                rows.append(agate.Row(data, column_names))
+    # _is_fork to tell agate that we already made things into `Row`s.
+    return agate.Table(rows, column_names, column_types, _is_fork=True)

core/dbt/clients/git.py

@@ -0,0 +1,174 @@
+import re
+import os.path
+
+from dbt.clients.system import run_cmd, rmdir
+from dbt.events.functions import fire_event
+from dbt.events.types import (
+    GitSparseCheckoutSubdirectory,
+    GitProgressCheckoutRevision,
+    GitProgressUpdatingExistingDependency,
+    GitProgressPullingNewDependency,
+    GitNothingToDo,
+    GitProgressUpdatedCheckoutRange,
+    GitProgressCheckedOutAt,
+)
+from dbt.exceptions import (
+    CommandResultError,
+    RuntimeException,
+    bad_package_spec,
+    raise_git_cloning_error,
+    raise_git_cloning_problem,
+)
+from packaging import version
+
+
+def _is_commit(revision: str) -> bool:
+    # match SHA-1 git commit
+    return bool(re.match(r"\b[0-9a-f]{40}\b", revision))
+
+
+def _raise_git_cloning_error(repo, revision, error):
+    stderr = error.stderr.strip()
+    if "usage: git" in stderr:
+        stderr = stderr.split("\nusage: git")[0]
+    if re.match("fatal: destination path '(.+)' already exists", stderr):
+        raise_git_cloning_error(error)
+
+    bad_package_spec(repo, revision, stderr)
+
+
+def clone(repo, cwd, dirname=None, remove_git_dir=False, revision=None, subdirectory=None):
+    has_revision = revision is not None
+    is_commit = _is_commit(revision or "")
+
+    clone_cmd = ["git", "clone", "--depth", "1"]
+    if subdirectory:
+        fire_event(GitSparseCheckoutSubdirectory(subdir=subdirectory))
+        out, _ = run_cmd(cwd, ["git", "--version"], env={"LC_ALL": "C"})
+        git_version = version.parse(re.search(r"\d+\.\d+\.\d+", out.decode("utf-8")).group(0))
+        if not git_version >= version.parse("2.25.0"):
+            # 2.25.0 introduces --sparse
+            raise RuntimeError(
+                "Please update your git version to pull a dbt package "
+                "from a subdirectory: your version is {}, >= 2.25.0 needed".format(git_version)
+            )
+        clone_cmd.extend(["--filter=blob:none", "--sparse"])
+
+    if has_revision and not is_commit:
+        clone_cmd.extend(["--branch", revision])
+
+    clone_cmd.append(repo)
+
+    if dirname is not None:
+        clone_cmd.append(dirname)
+    try:
+        result = run_cmd(cwd, clone_cmd, env={"LC_ALL": "C"})
+    except CommandResultError as exc:
+        _raise_git_cloning_error(repo, revision, exc)
+
+    if subdirectory:
+        cwd_subdir = os.path.join(cwd, dirname or "")
+        clone_cmd_subdir = ["git", "sparse-checkout", "set", subdirectory]
+        try:
+            run_cmd(cwd_subdir, clone_cmd_subdir)
+        except CommandResultError as exc:
+            _raise_git_cloning_error(repo, revision, exc)
+
+    if remove_git_dir:
+        rmdir(os.path.join(dirname, ".git"))
+
+    return result
+
+
+def list_tags(cwd):
+    out, err = run_cmd(cwd, ["git", "tag", "--list"], env={"LC_ALL": "C"})
+    tags = out.decode("utf-8").strip().split("\n")
+    return tags
+
+
+def _checkout(cwd, repo, revision):
+    fire_event(GitProgressCheckoutRevision(revision=revision))
+
+    fetch_cmd = ["git", "fetch", "origin", "--depth", "1"]
+
+    if _is_commit(revision):
+        run_cmd(cwd, fetch_cmd + [revision])
+    else:
+        run_cmd(cwd, ["git", "remote", "set-branches", "origin", revision])
+        run_cmd(cwd, fetch_cmd + ["--tags", revision])
+
+    if _is_commit(revision):
+        spec = revision
+    # Prefer tags to branches if one exists
+    elif revision in list_tags(cwd):
+        spec = "tags/{}".format(revision)
+    else:
+        spec = "origin/{}".format(revision)
+
+    out, err = run_cmd(cwd, ["git", "reset", "--hard", spec], env={"LC_ALL": "C"})
+    return out, err
+
+
+def checkout(cwd, repo, revision=None):
+    if revision is None:
+        revision = "HEAD"
+    try:
+        return _checkout(cwd, repo, revision)
+    except CommandResultError as exc:
+        stderr = exc.stderr.strip()
+        bad_package_spec(repo, revision, stderr)
+
+
+def get_current_sha(cwd):
+    out, err = run_cmd(cwd, ["git", "rev-parse", "HEAD"], env={"LC_ALL": "C"})
+
+    return out.decode("utf-8")
+
+
+def remove_remote(cwd):
+    return run_cmd(cwd, ["git", "remote", "rm", "origin"], env={"LC_ALL": "C"})
+
+
+def clone_and_checkout(
+    repo, cwd, dirname=None, remove_git_dir=False, revision=None, subdirectory=None
+):
+    exists = None
+    try:
+        _, err = clone(
+            repo,
+            cwd,
+            dirname=dirname,
+            remove_git_dir=remove_git_dir,
+            subdirectory=subdirectory,
+        )
+    except CommandResultError as exc:
+        err = exc.stderr
+        exists = re.match("fatal: destination path '(.+)' already exists", err)
+        if not exists:
+            raise_git_cloning_problem(repo)
+
+    directory = None
+    start_sha = None
+    if exists:
+        directory = exists.group(1)
+        fire_event(GitProgressUpdatingExistingDependency(dir=directory))
+    else:
+        matches = re.match("Cloning into '(.+)'", err.decode("utf-8"))
+        if matches is None:
+            raise RuntimeException(f'Error cloning {repo} - never saw "Cloning into ..." from git')
+        directory = matches.group(1)
+        fire_event(GitProgressPullingNewDependency(dir=directory))
+    full_path = os.path.join(cwd, directory)
+    start_sha = get_current_sha(full_path)
+    checkout(full_path, repo, revision)
+    end_sha = get_current_sha(full_path)
+    if exists:
+        if start_sha == end_sha:
+            fire_event(GitNothingToDo(sha=start_sha[:7]))
+        else:
+            fire_event(
+                GitProgressUpdatedCheckoutRange(start_sha=start_sha[:7], end_sha=end_sha[:7])
+            )
+    else:
+        fire_event(GitProgressCheckedOutAt(end_sha=end_sha[:7]))
+    return os.path.join(directory, subdirectory or "")

core/dbt/clients/jinja.py

@@ -0,0 +1,634 @@
+import codecs
+import linecache
+import os
+import re
+import tempfile
+import threading
+from ast import literal_eval
+from contextlib import contextmanager
+from itertools import chain, islice
+from typing import List, Union, Set, Optional, Dict, Any, Iterator, Type, NoReturn, Tuple, Callable
+
+import jinja2
+import jinja2.ext
+import jinja2.nativetypes  # type: ignore
+import jinja2.nodes
+import jinja2.parser
+import jinja2.sandbox
+
+from dbt.utils import (
+    get_dbt_macro_name,
+    get_docs_macro_name,
+    get_materialization_macro_name,
+    get_test_macro_name,
+    deep_map_render,
+)
+
+from dbt.clients._jinja_blocks import BlockIterator, BlockData, BlockTag
+from dbt.contracts.graph.compiled import CompiledGenericTestNode
+from dbt.contracts.graph.parsed import ParsedGenericTestNode
+from dbt.exceptions import (
+    InternalException,
+    raise_compiler_error,
+    CompilationException,
+    invalid_materialization_argument,
+    MacroReturn,
+    JinjaRenderingException,
+    UndefinedMacroException,
+)
+from dbt import flags
+
+
+def _linecache_inject(source, write):
+    if write:
+        # this is the only reliable way to accomplish this. Obviously, it's
+        # really darn noisy and will fill your temporary directory
+        tmp_file = tempfile.NamedTemporaryFile(
+            prefix="dbt-macro-compiled-",
+            suffix=".py",
+            delete=False,
+            mode="w+",
+            encoding="utf-8",
+        )
+        tmp_file.write(source)
+        filename = tmp_file.name
+    else:
+        # `codecs.encode` actually takes a `bytes` as the first argument if
+        # the second argument is 'hex' - mypy does not know this.
+        rnd = codecs.encode(os.urandom(12), "hex")  # type: ignore
+        filename = rnd.decode("ascii")
+
+    # put ourselves in the cache
+    cache_entry = (len(source), None, [line + "\n" for line in source.splitlines()], filename)
+    # linecache does in fact have an attribute `cache`, thanks
+    linecache.cache[filename] = cache_entry  # type: ignore
+    return filename
+
+
+class MacroFuzzParser(jinja2.parser.Parser):
+    def parse_macro(self):
+        node = jinja2.nodes.Macro(lineno=next(self.stream).lineno)
+
+        # modified to fuzz macros defined in the same file. this way
+        # dbt can understand the stack of macros being called.
+        #  - @cmcarthur
+        node.name = get_dbt_macro_name(self.parse_assign_target(name_only=True).name)
+
+        self.parse_signature(node)
+        node.body = self.parse_statements(("name:endmacro",), drop_needle=True)
+        return node
+
+
+class MacroFuzzEnvironment(jinja2.sandbox.SandboxedEnvironment):
+    def _parse(self, source, name, filename):
+        return MacroFuzzParser(self, source, name, filename).parse()
+
+    def _compile(self, source, filename):
+        """Override jinja's compilation to stash the rendered source inside
+        the python linecache for debugging when the appropriate environment
+        variable is set.
+
+        If the value is 'write', also write the files to disk.
+        WARNING: This can write a ton of data if you aren't careful.
+        """
+        if filename == "<template>" and flags.MACRO_DEBUGGING:
+            write = flags.MACRO_DEBUGGING == "write"
+            filename = _linecache_inject(source, write)
+
+        return super()._compile(source, filename)  # type: ignore
+
+
+class NativeSandboxEnvironment(MacroFuzzEnvironment):
+    code_generator_class = jinja2.nativetypes.NativeCodeGenerator
+
+
+class TextMarker(str):
+    """A special native-env marker that indicates a value is text and is
+    not to be evaluated. Use this to prevent your numbery-strings from becoming
+    numbers!
+    """
+
+
+class NativeMarker(str):
+    """A special native-env marker that indicates the field should be passed to
+    literal_eval.
+    """
+
+
+class BoolMarker(NativeMarker):
+    pass
+
+
+class NumberMarker(NativeMarker):
+    pass
+
+
+def _is_number(value) -> bool:
+    return isinstance(value, (int, float)) and not isinstance(value, bool)
+
+
+def quoted_native_concat(nodes):
+    """This is almost native_concat from the NativeTemplate, except in the
+    special case of a single argument that is a quoted string and returns a
+    string, the quotes are re-inserted.
+    """
+    head = list(islice(nodes, 2))
+
+    if not head:
+        return ""
+
+    if len(head) == 1:
+        raw = head[0]
+        if isinstance(raw, TextMarker):
+            return str(raw)
+        elif not isinstance(raw, NativeMarker):
+            # return non-strings as-is
+            return raw
+    else:
+        # multiple nodes become a string.
+        return "".join([str(v) for v in chain(head, nodes)])
+
+    try:
+        result = literal_eval(raw)
+    except (ValueError, SyntaxError, MemoryError):
+        result = raw
+    if isinstance(raw, BoolMarker) and not isinstance(result, bool):
+        raise JinjaRenderingException(f"Could not convert value '{raw!s}' into type 'bool'")
+    if isinstance(raw, NumberMarker) and not _is_number(result):
+        raise JinjaRenderingException(f"Could not convert value '{raw!s}' into type 'number'")
+
+    return result
+
+
+class NativeSandboxTemplate(jinja2.nativetypes.NativeTemplate):  # mypy: ignore
+    environment_class = NativeSandboxEnvironment
+
+    def render(self, *args, **kwargs):
+        """Render the template to produce a native Python type. If the
+        result is a single node, its value is returned. Otherwise, the
+        nodes are concatenated as strings. If the result can be parsed
+        with :func:`ast.literal_eval`, the parsed value is returned.
+        Otherwise, the string is returned.
+        """
+        vars = dict(*args, **kwargs)
+
+        try:
+            return quoted_native_concat(self.root_render_func(self.new_context(vars)))
+        except Exception:
+            return self.environment.handle_exception()
+
+
+NativeSandboxEnvironment.template_class = NativeSandboxTemplate  # type: ignore
+
+
+class TemplateCache:
+    def __init__(self):
+        self.file_cache: Dict[str, jinja2.Template] = {}
+
+    def get_node_template(self, node) -> jinja2.Template:
+        key = node.macro_sql
+
+        if key in self.file_cache:
+            return self.file_cache[key]
+
+        template = get_template(
+            string=node.macro_sql,
+            ctx={},
+            node=node,
+        )
+
+        self.file_cache[key] = template
+        return template
+
+    def clear(self):
+        self.file_cache.clear()
+
+
+template_cache = TemplateCache()
+
+
+class BaseMacroGenerator:
+    def __init__(self, context: Optional[Dict[str, Any]] = None) -> None:
+        self.context: Optional[Dict[str, Any]] = context
+
+    def get_template(self):
+        raise NotImplementedError("get_template not implemented!")
+
+    def get_name(self) -> str:
+        raise NotImplementedError("get_name not implemented!")
+
+    def get_macro(self):
+        name = self.get_name()
+        template = self.get_template()
+        # make the module. previously we set both vars and local, but that's
+        # redundant: They both end up in the same place
+        # make_module is in jinja2.environment. It returns a TemplateModule
+        module = template.make_module(vars=self.context, shared=False)
+        macro = module.__dict__[get_dbt_macro_name(name)]
+        module.__dict__.update(self.context)
+        return macro
+
+    @contextmanager
+    def exception_handler(self) -> Iterator[None]:
+        try:
+            yield
+        except (TypeError, jinja2.exceptions.TemplateRuntimeError) as e:
+            raise_compiler_error(str(e))
+
+    def call_macro(self, *args, **kwargs):
+        # called from __call__ methods
+        if self.context is None:
+            raise InternalException("Context is still None in call_macro!")
+        assert self.context is not None
+
+        macro = self.get_macro()
+
+        with self.exception_handler():
+            try:
+                return macro(*args, **kwargs)
+            except MacroReturn as e:
+                return e.value
+
+
+class MacroStack(threading.local):
+    def __init__(self):
+        super().__init__()
+        self.call_stack = []
+
+    @property
+    def depth(self) -> int:
+        return len(self.call_stack)
+
+    def push(self, name):
+        self.call_stack.append(name)
+
+    def pop(self, name):
+        got = self.call_stack.pop()
+        if got != name:
+            raise InternalException(f"popped {got}, expected {name}")
+
+
+class MacroGenerator(BaseMacroGenerator):
+    def __init__(
+        self,
+        macro,
+        context: Optional[Dict[str, Any]] = None,
+        node: Optional[Any] = None,
+        stack: Optional[MacroStack] = None,
+    ) -> None:
+        super().__init__(context)
+        self.macro = macro
+        self.node = node
+        self.stack = stack
+
+    def get_template(self):
+        return template_cache.get_node_template(self.macro)
+
+    def get_name(self) -> str:
+        return self.macro.name
+
+    @contextmanager
+    def exception_handler(self) -> Iterator[None]:
+        try:
+            yield
+        except (TypeError, jinja2.exceptions.TemplateRuntimeError) as e:
+            raise_compiler_error(str(e), self.macro)
+        except CompilationException as e:
+            e.stack.append(self.macro)
+            raise e
+
+    # This adds the macro's unique id to the node's 'depends_on'
+    @contextmanager
+    def track_call(self):
+        # This is only called from __call__
+        if self.stack is None or self.node is None:
+            yield
+        else:
+            unique_id = self.macro.unique_id
+            depth = self.stack.depth
+            # only mark depth=0 as a dependency
+            if depth == 0:
+                self.node.depends_on.add_macro(unique_id)
+            self.stack.push(unique_id)
+            try:
+                yield
+            finally:
+                self.stack.pop(unique_id)
+
+    # this makes MacroGenerator objects callable like functions
+    def __call__(self, *args, **kwargs):
+        with self.track_call():
+            return self.call_macro(*args, **kwargs)
+
+
+class QueryStringGenerator(BaseMacroGenerator):
+    def __init__(self, template_str: str, context: Dict[str, Any]) -> None:
+        super().__init__(context)
+        self.template_str: str = template_str
+        env = get_environment()
+        self.template = env.from_string(
+            self.template_str,
+            globals=self.context,
+        )
+
+    def get_name(self) -> str:
+        return "query_comment_macro"
+
+    def get_template(self):
+        """Don't use the template cache, we don't have a node"""
+        return self.template
+
+    def __call__(self, connection_name: str, node) -> str:
+        return str(self.call_macro(connection_name, node))
+
+
+class MaterializationExtension(jinja2.ext.Extension):
+    tags = ["materialization"]
+
+    def parse(self, parser):
+        node = jinja2.nodes.Macro(lineno=next(parser.stream).lineno)
+        materialization_name = parser.parse_assign_target(name_only=True).name
+
+        adapter_name = "default"
+        node.args = []
+        node.defaults = []
+
+        while parser.stream.skip_if("comma"):
+            target = parser.parse_assign_target(name_only=True)
+
+            if target.name == "default":
+                pass
+
+            elif target.name == "adapter":
+                parser.stream.expect("assign")
+                value = parser.parse_expression()
+                adapter_name = value.value
+
+            else:
+                invalid_materialization_argument(materialization_name, target.name)
+
+        node.name = get_materialization_macro_name(materialization_name, adapter_name)
+
+        node.body = parser.parse_statements(("name:endmaterialization",), drop_needle=True)
+
+        return node
+
+
+class DocumentationExtension(jinja2.ext.Extension):
+    tags = ["docs"]
+
+    def parse(self, parser):
+        node = jinja2.nodes.Macro(lineno=next(parser.stream).lineno)
+        docs_name = parser.parse_assign_target(name_only=True).name
+
+        node.args = []
+        node.defaults = []
+        node.name = get_docs_macro_name(docs_name)
+        node.body = parser.parse_statements(("name:enddocs",), drop_needle=True)
+        return node
+
+
+class TestExtension(jinja2.ext.Extension):
+    tags = ["test"]
+
+    def parse(self, parser):
+        node = jinja2.nodes.Macro(lineno=next(parser.stream).lineno)
+        test_name = parser.parse_assign_target(name_only=True).name
+
+        parser.parse_signature(node)
+        node.name = get_test_macro_name(test_name)
+        node.body = parser.parse_statements(("name:endtest",), drop_needle=True)
+        return node
+
+
+def _is_dunder_name(name):
+    return name.startswith("__") and name.endswith("__")
+
+
+def create_undefined(node=None):
+    class Undefined(jinja2.Undefined):
+        def __init__(self, hint=None, obj=None, name=None, exc=None):
+            super().__init__(hint=hint, name=name)
+            self.node = node
+            self.name = name
+            self.hint = hint
+            # jinja uses these for safety, so we have to override them.
+            # see https://github.com/pallets/jinja/blob/master/jinja2/sandbox.py#L332-L339 # noqa
+            self.unsafe_callable = False
+            self.alters_data = False
+
+        def __getitem__(self, name):
+            # Propagate the undefined value if a caller accesses this as if it
+            # were a dictionary
+            return self
+
+        def __getattr__(self, name):
+            if name == "name" or _is_dunder_name(name):
+                raise AttributeError(
+                    "'{}' object has no attribute '{}'".format(type(self).__name__, name)
+                )
+
+            self.name = name
+
+            return self.__class__(hint=self.hint, name=self.name)
+
+        def __call__(self, *args, **kwargs):
+            return self
+
+        def __reduce__(self):
+            raise_compiler_error(f"{self.name} is undefined", node=node)
+
+    return Undefined
+
+
+NATIVE_FILTERS: Dict[str, Callable[[Any], Any]] = {
+    "as_text": TextMarker,
+    "as_bool": BoolMarker,
+    "as_native": NativeMarker,
+    "as_number": NumberMarker,
+}
+
+
+TEXT_FILTERS: Dict[str, Callable[[Any], Any]] = {
+    "as_text": lambda x: x,
+    "as_bool": lambda x: x,
+    "as_native": lambda x: x,
+    "as_number": lambda x: x,
+}
+
+
+def get_environment(
+    node=None,
+    capture_macros: bool = False,
+    native: bool = False,
+) -> jinja2.Environment:
+    args: Dict[str, List[Union[str, Type[jinja2.ext.Extension]]]] = {
+        "extensions": ["jinja2.ext.do"]
+    }
+
+    if capture_macros:
+        args["undefined"] = create_undefined(node)
+
+    args["extensions"].append(MaterializationExtension)
+    args["extensions"].append(DocumentationExtension)
+    args["extensions"].append(TestExtension)
+
+    env_cls: Type[jinja2.Environment]
+    text_filter: Type
+    if native:
+        env_cls = NativeSandboxEnvironment
+        filters = NATIVE_FILTERS
+    else:
+        env_cls = MacroFuzzEnvironment
+        filters = TEXT_FILTERS
+
+    env = env_cls(**args)
+    env.filters.update(filters)
+
+    return env
+
+
+@contextmanager
+def catch_jinja(node=None) -> Iterator[None]:
+    try:
+        yield
+    except jinja2.exceptions.TemplateSyntaxError as e:
+        e.translated = False
+        raise CompilationException(str(e), node) from e
+    except jinja2.exceptions.UndefinedError as e:
+        raise UndefinedMacroException(str(e), node) from e
+    except CompilationException as exc:
+        exc.add_node(node)
+        raise
+
+
+def parse(string):
+    with catch_jinja():
+        return get_environment().parse(str(string))
+
+
+def get_template(
+    string: str,
+    ctx: Dict[str, Any],
+    node=None,
+    capture_macros: bool = False,
+    native: bool = False,
+):
+    with catch_jinja(node):
+        env = get_environment(node, capture_macros, native=native)
+
+        template_source = str(string)
+        return env.from_string(template_source, globals=ctx)
+
+
+def render_template(template, ctx: Dict[str, Any], node=None) -> str:
+    with catch_jinja(node):
+        return template.render(ctx)
+
+
+def _requote_result(raw_value: str, rendered: str) -> str:
+    double_quoted = raw_value.startswith('"') and raw_value.endswith('"')
+    single_quoted = raw_value.startswith("'") and raw_value.endswith("'")
+    if double_quoted:
+        quote_char = '"'
+    elif single_quoted:
+        quote_char = "'"
+    else:
+        quote_char = ""
+    return f"{quote_char}{rendered}{quote_char}"
+
+
+# performance note: Local benmcharking (so take it with a big grain of salt!)
+# on this indicates that it is is on average slightly slower than
+# checking two separate patterns, but the standard deviation is smaller with
+# one pattern. The time difference between the two was ~2 std deviations, which
+# is small enough that I've just chosen the more readable option.
+_HAS_RENDER_CHARS_PAT = re.compile(r"({[{%#]|[#}%]})")
+
+
+def get_rendered(
+    string: str,
+    ctx: Dict[str, Any],
+    node=None,
+    capture_macros: bool = False,
+    native: bool = False,
+) -> str:
+    # performance optimization: if there are no jinja control characters in the
+    # string, we can just return the input. Fall back to jinja if the type is
+    # not a string or if native rendering is enabled (so '1' -> 1, etc...)
+    # If this is desirable in the native env as well, we could handle the
+    # native=True case by passing the input string to ast.literal_eval, like
+    # the native renderer does.
+    if not native and isinstance(string, str) and _HAS_RENDER_CHARS_PAT.search(string) is None:
+        return string
+    template = get_template(
+        string,
+        ctx,
+        node,
+        capture_macros=capture_macros,
+        native=native,
+    )
+    return render_template(template, ctx, node)
+
+
+def undefined_error(msg) -> NoReturn:
+    raise jinja2.exceptions.UndefinedError(msg)
+
+
+def extract_toplevel_blocks(
+    data: str,
+    allowed_blocks: Optional[Set[str]] = None,
+    collect_raw_data: bool = True,
+) -> List[Union[BlockData, BlockTag]]:
+    """Extract the top-level blocks with matching block types from a jinja
+    file, with some special handling for block nesting.
+
+    :param data: The data to extract blocks from.
+    :param allowed_blocks: The names of the blocks to extract from the file.
+        They may not be nested within if/for blocks. If None, use the default
+        values.
+    :param collect_raw_data: If set, raw data between matched blocks will also
+        be part of the results, as `BlockData` objects. They have a
+        `block_type_name` field of `'__dbt_data'` and will never have a
+        `block_name`.
+    :return: A list of `BlockTag`s matching the allowed block types and (if
+        `collect_raw_data` is `True`) `BlockData` objects.
+    """
+    return BlockIterator(data).lex_for_blocks(
+        allowed_blocks=allowed_blocks, collect_raw_data=collect_raw_data
+    )
+
+
+GENERIC_TEST_KWARGS_NAME = "_dbt_generic_test_kwargs"
+
+
+def add_rendered_test_kwargs(
+    context: Dict[str, Any],
+    node: Union[ParsedGenericTestNode, CompiledGenericTestNode],
+    capture_macros: bool = False,
+) -> None:
+    """Render each of the test kwargs in the given context using the native
+    renderer, then insert that value into the given context as the special test
+    keyword arguments member.
+    """
+    looks_like_func = r"^\s*(env_var|ref|var|source|doc)\s*\(.+\)\s*$"
+
+    def _convert_function(value: Any, keypath: Tuple[Union[str, int], ...]) -> Any:
+        if isinstance(value, str):
+            if keypath == ("column_name",):
+                # special case: Don't render column names as native, make them
+                # be strings
+                return value
+
+            if re.match(looks_like_func, value) is not None:
+                # curly braces to make rendering happy
+                value = f"{{{{ {value} }}}}"
+
+            value = get_rendered(value, context, node, capture_macros=capture_macros, native=True)
+
+        return value
+
+    # The test_metadata.kwargs come from the test builder, and were set
+    # when the test node was created in _parse_generic_test.
+    kwargs = deep_map_render(_convert_function, node.test_metadata.kwargs)
+    context[GENERIC_TEST_KWARGS_NAME] = kwargs

core/dbt/clients/jinja_static.py

@@ -0,0 +1,158 @@
+import jinja2
+from dbt.clients.jinja import get_environment
+from dbt.exceptions import raise_compiler_error
+
+
+def statically_extract_macro_calls(string, ctx, db_wrapper=None):
+    # set 'capture_macros' to capture undefined
+    env = get_environment(None, capture_macros=True)
+    parsed = env.parse(string)
+
+    standard_calls = ["source", "ref", "config"]
+    possible_macro_calls = []
+    for func_call in parsed.find_all(jinja2.nodes.Call):
+        func_name = None
+        if hasattr(func_call, "node") and hasattr(func_call.node, "name"):
+            func_name = func_call.node.name
+        else:
+            # func_call for dbt_utils.current_timestamp macro
+            # Call(
+            #   node=Getattr(
+            #     node=Name(
+            #       name='dbt_utils',
+            #       ctx='load'
+            #     ),
+            #     attr='current_timestamp',
+            #     ctx='load
+            #   ),
+            #   args=[],
+            #   kwargs=[],
+            #   dyn_args=None,
+            #   dyn_kwargs=None
+            # )
+            if (
+                hasattr(func_call, "node")
+                and hasattr(func_call.node, "node")
+                and type(func_call.node.node).__name__ == "Name"
+                and hasattr(func_call.node, "attr")
+            ):
+                package_name = func_call.node.node.name
+                macro_name = func_call.node.attr
+                if package_name == "adapter":
+                    if macro_name == "dispatch":
+                        ad_macro_calls = statically_parse_adapter_dispatch(
+                            func_call, ctx, db_wrapper
+                        )
+                        possible_macro_calls.extend(ad_macro_calls)
+                    else:
+                        # This skips calls such as adapter.parse_index
+                        continue
+                else:
+                    func_name = f"{package_name}.{macro_name}"
+            else:
+                continue
+        if not func_name:
+            continue
+        if func_name in standard_calls:
+            continue
+        elif ctx.get(func_name):
+            continue
+        else:
+            if func_name not in possible_macro_calls:
+                possible_macro_calls.append(func_name)
+
+    return possible_macro_calls
+
+
+# Call(
+#   node=Getattr(
+#     node=Name(
+#       name='adapter',
+#       ctx='load'
+#     ),
+#     attr='dispatch',
+#     ctx='load'
+#   ),
+#   args=[
+#     Const(value='test_pkg_and_dispatch')
+#   ],
+#   kwargs=[
+#     Keyword(
+#       key='packages',
+#       value=Call(node=Getattr(node=Name(name='local_utils', ctx='load'),
+#          attr='_get_utils_namespaces', ctx='load'), args=[], kwargs=[],
+#          dyn_args=None, dyn_kwargs=None)
+#     )
+#   ],
+#   dyn_args=None,
+#   dyn_kwargs=None
+# )
+def statically_parse_adapter_dispatch(func_call, ctx, db_wrapper):
+    possible_macro_calls = []
+    # This captures an adapter.dispatch('<macro_name>') call.
+
+    func_name = None
+    # macro_name positional argument
+    if len(func_call.args) > 0:
+        func_name = func_call.args[0].value
+    if func_name:
+        possible_macro_calls.append(func_name)
+
+    # packages positional argument
+    macro_namespace = None
+    packages_arg = None
+    packages_arg_type = None
+
+    if len(func_call.args) > 1:
+        packages_arg = func_call.args[1]
+        # This can be a List or a Call
+        packages_arg_type = type(func_call.args[1]).__name__
+
+    # keyword arguments
+    if func_call.kwargs:
+        for kwarg in func_call.kwargs:
+            if kwarg.key == "macro_name":
+                # This will remain to enable static resolution
+                if type(kwarg.value).__name__ == "Const":
+                    func_name = kwarg.value.value
+                    possible_macro_calls.append(func_name)
+                else:
+                    raise_compiler_error(
+                        f"The macro_name parameter ({kwarg.value.value}) "
+                        "to adapter.dispatch was not a string"
+                    )
+            elif kwarg.key == "macro_namespace":
+                # This will remain to enable static resolution
+                kwarg_type = type(kwarg.value).__name__
+                if kwarg_type == "Const":
+                    macro_namespace = kwarg.value.value
+                else:
+                    raise_compiler_error(
+                        "The macro_namespace parameter to adapter.dispatch "
+                        f"is a {kwarg_type}, not a string"
+                    )
+
+    # positional arguments
+    if packages_arg:
+        if packages_arg_type == "List":
+            # This will remain to enable static resolution
+            packages = []
+            for item in packages_arg.items:
+                packages.append(item.value)
+        elif packages_arg_type == "Const":
+            # This will remain to enable static resolution
+            macro_namespace = packages_arg.value
+
+    if db_wrapper:
+        macro = db_wrapper.dispatch(func_name, macro_namespace=macro_namespace).macro
+        func_name = f"{macro.package_name}.{macro.name}"
+        possible_macro_calls.append(func_name)
+    else:  # this is only for test/unit/test_macro_calls.py
+        if macro_namespace:
+            packages = [macro_namespace]
+        else:
+            packages = []
+        for package_name in packages:
+            possible_macro_calls.append(f"{package_name}.{func_name}")
+
+    return possible_macro_calls

core/dbt/clients/registry.py

@@ -0,0 +1,164 @@
+import functools
+from typing import Any, Dict, List
+import requests
+from dbt.events.functions import fire_event
+from dbt.events.types import (
+    RegistryProgressMakingGETRequest,
+    RegistryProgressGETResponse,
+    RegistryIndexProgressMakingGETRequest,
+    RegistryIndexProgressGETResponse,
+    RegistryResponseUnexpectedType,
+    RegistryResponseMissingTopKeys,
+    RegistryResponseMissingNestedKeys,
+    RegistryResponseExtraNestedKeys,
+)
+from dbt.utils import memoized, _connection_exception_retry as connection_exception_retry
+from dbt import deprecations
+import os
+
+if os.getenv("DBT_PACKAGE_HUB_URL"):
+    DEFAULT_REGISTRY_BASE_URL = os.getenv("DBT_PACKAGE_HUB_URL")
+else:
+    DEFAULT_REGISTRY_BASE_URL = "https://hub.getdbt.com/"
+
+
+def _get_url(name, registry_base_url=None):
+    if registry_base_url is None:
+        registry_base_url = DEFAULT_REGISTRY_BASE_URL
+    url = "api/v1/{}.json".format(name)
+
+    return "{}{}".format(registry_base_url, url)
+
+
+def _get_with_retries(package_name, registry_base_url=None):
+    get_fn = functools.partial(_get, package_name, registry_base_url)
+    return connection_exception_retry(get_fn, 5)
+
+
+def _get(package_name, registry_base_url=None):
+    url = _get_url(package_name, registry_base_url)
+    fire_event(RegistryProgressMakingGETRequest(url=url))
+    # all exceptions from requests get caught in the retry logic so no need to wrap this here
+    resp = requests.get(url, timeout=30)
+    fire_event(RegistryProgressGETResponse(url=url, resp_code=resp.status_code))
+    resp.raise_for_status()
+
+    # The response should always be a dictionary.  Anything else is unexpected, raise error.
+    # Raising this error will cause this function to retry (if called within _get_with_retries)
+    # and hopefully get a valid response.  This seems to happen when there's an issue with the Hub.
+    # Since we control what we expect the HUB to return, this is safe.
+    # See https://github.com/dbt-labs/dbt-core/issues/4577
+    # and https://github.com/dbt-labs/dbt-core/issues/4849
+    response = resp.json()
+
+    if not isinstance(response, dict):  # This will also catch Nonetype
+        error_msg = (
+            f"Request error: Expected a response type of <dict> but got {type(response)} instead"
+        )
+        fire_event(RegistryResponseUnexpectedType(response=response))
+        raise requests.exceptions.ContentDecodingError(error_msg, response=resp)
+
+    # check for expected top level keys
+    expected_keys = {"name", "versions"}
+    if not expected_keys.issubset(response):
+        error_msg = (
+            f"Request error: Expected the response to contain keys {expected_keys} "
+            f"but is missing {expected_keys.difference(set(response))}"
+        )
+        fire_event(RegistryResponseMissingTopKeys(response=response))
+        raise requests.exceptions.ContentDecodingError(error_msg, response=resp)
+
+    # check for the keys we need nested under each version
+    expected_version_keys = {"name", "packages", "downloads"}
+    all_keys = set().union(*(response["versions"][d] for d in response["versions"]))
+    if not expected_version_keys.issubset(all_keys):
+        error_msg = (
+            "Request error: Expected the response for the version to contain keys "
+            f"{expected_version_keys} but is missing {expected_version_keys.difference(all_keys)}"
+        )
+        fire_event(RegistryResponseMissingNestedKeys(response=response))
+        raise requests.exceptions.ContentDecodingError(error_msg, response=resp)
+
+    # all version responses should contain identical keys.
+    has_extra_keys = set().difference(*(response["versions"][d] for d in response["versions"]))
+    if has_extra_keys:
+        error_msg = (
+            "Request error: Keys for all versions do not match.  Found extra key(s) "
+            f"of {has_extra_keys}."
+        )
+        fire_event(RegistryResponseExtraNestedKeys(response=response))
+        raise requests.exceptions.ContentDecodingError(error_msg, response=resp)
+
+    # Either redirectnamespace or redirectname in the JSON response indicate a redirect
+    # redirectnamespace redirects based on package ownership
+    # redirectname redirects based on package name
+    # Both can be present at the same time, or neither. Fails gracefully to old name
+    if ("redirectnamespace" in response) or ("redirectname" in response):
+
+        if ("redirectnamespace" in response) and response["redirectnamespace"] is not None:
+            use_namespace = response["redirectnamespace"]
+        else:
+            use_namespace = response["namespace"]
+
+        if ("redirectname" in response) and response["redirectname"] is not None:
+            use_name = response["redirectname"]
+        else:
+            use_name = response["name"]
+
+        new_nwo = use_namespace + "/" + use_name
+        deprecations.warn("package-redirect", old_name=package_name, new_name=new_nwo)
+
+    return response
+
+
+_get_cached = memoized(_get_with_retries)
+
+
+def package(package_name, registry_base_url=None) -> Dict[str, Any]:
+    # returns a dictionary of metadata for all versions of a package
+    response = _get_cached(package_name, registry_base_url)
+    return response["versions"]
+
+
+def package_version(package_name, version, registry_base_url=None) -> Dict[str, Any]:
+    # returns the metadata of a specific version of a package
+    response = package(package_name, registry_base_url)
+    return response[version]
+
+
+def get_available_versions(package_name) -> List["str"]:
+    # returns a list of all available versions of a package
+    response = package(package_name)
+    return list(response)
+
+
+def _get_index(registry_base_url=None):
+
+    url = _get_url("index", registry_base_url)
+    fire_event(RegistryIndexProgressMakingGETRequest(url=url))
+    # all exceptions from requests get caught in the retry logic so no need to wrap this here
+    resp = requests.get(url, timeout=30)
+    fire_event(RegistryIndexProgressGETResponse(url=url, resp_code=resp.status_code))
+    resp.raise_for_status()
+
+    # The response should be a list.  Anything else is unexpected, raise an error.
+    # Raising this error will cause this function to retry and hopefully get a valid response.
+
+    response = resp.json()
+
+    if not isinstance(response, list):  # This will also catch Nonetype
+        error_msg = (
+            f"Request error: The response type of {type(response)} is not valid: {resp.text}"
+        )
+        raise requests.exceptions.ContentDecodingError(error_msg, response=resp)
+
+    return response
+
+
+def index(registry_base_url=None) -> List[str]:
+    # this returns a list of all packages on the Hub
+    get_index_fn = functools.partial(_get_index, registry_base_url)
+    return connection_exception_retry(get_index_fn, 5)
+
+
+index_cached = memoized(index)

core/dbt/clients/system.py

@@ -0,0 +1,543 @@
+import errno
+import functools
+import fnmatch
+import json
+import os
+import os.path
+import re
+import shutil
+import subprocess
+import sys
+import tarfile
+import requests
+import stat
+from typing import Type, NoReturn, List, Optional, Dict, Any, Tuple, Callable, Union
+
+from dbt.events.functions import fire_event
+from dbt.events.types import (
+    SystemErrorRetrievingModTime,
+    SystemCouldNotWrite,
+    SystemExecutingCmd,
+    SystemStdOutMsg,
+    SystemStdErrMsg,
+    SystemReportReturnCode,
+)
+import dbt.exceptions
+from dbt.utils import _connection_exception_retry as connection_exception_retry
+
+if sys.platform == "win32":
+    from ctypes import WinDLL, c_bool
+else:
+    WinDLL = None
+    c_bool = None
+
+
+def find_matching(
+    root_path: str,
+    relative_paths_to_search: List[str],
+    file_pattern: str,
+) -> List[Dict[str, Any]]:
+    """
+    Given an absolute `root_path`, a list of relative paths to that
+    absolute root path (`relative_paths_to_search`), and a `file_pattern`
+    like '*.sql', returns information about the files. For example:
+
+    > find_matching('/root/path', ['models'], '*.sql')
+
+      [ { 'absolute_path': '/root/path/models/model_one.sql',
+          'relative_path': 'model_one.sql',
+          'searched_path': 'models' },
+        { 'absolute_path': '/root/path/models/subdirectory/model_two.sql',
+          'relative_path': 'subdirectory/model_two.sql',
+          'searched_path': 'models' } ]
+    """
+    matching = []
+    root_path = os.path.normpath(root_path)
+    regex = fnmatch.translate(file_pattern)
+    reobj = re.compile(regex, re.IGNORECASE)
+
+    for relative_path_to_search in relative_paths_to_search:
+        absolute_path_to_search = os.path.join(root_path, relative_path_to_search)
+        walk_results = os.walk(absolute_path_to_search)
+
+        for current_path, subdirectories, local_files in walk_results:
+            for local_file in local_files:
+                absolute_path = os.path.join(current_path, local_file)
+                relative_path = os.path.relpath(absolute_path, absolute_path_to_search)
+                modification_time = 0.0
+                try:
+                    modification_time = os.path.getmtime(absolute_path)
+                except OSError:
+                    fire_event(SystemErrorRetrievingModTime(path=absolute_path))
+                if reobj.match(local_file):
+                    matching.append(
+                        {
+                            "searched_path": relative_path_to_search,
+                            "absolute_path": absolute_path,
+                            "relative_path": relative_path,
+                            "modification_time": modification_time,
+                        }
+                    )
+
+    return matching
+
+
+def load_file_contents(path: str, strip: bool = True) -> str:
+    path = convert_path(path)
+    with open(path, "rb") as handle:
+        to_return = handle.read().decode("utf-8")
+
+    if strip:
+        to_return = to_return.strip()
+
+    return to_return
+
+
+def make_directory(path: str) -> None:
+    """
+    Make a directory and any intermediate directories that don't already
+    exist. This function handles the case where two threads try to create
+    a directory at once.
+    """
+    path = convert_path(path)
+    if not os.path.exists(path):
+        # concurrent writes that try to create the same dir can fail
+        try:
+            os.makedirs(path)
+
+        except OSError as e:
+            if e.errno == errno.EEXIST:
+                pass
+            else:
+                raise e
+
+
+def make_file(path: str, contents: str = "", overwrite: bool = False) -> bool:
+    """
+    Make a file at `path` assuming that the directory it resides in already
+    exists. The file is saved with contents `contents`
+    """
+    if overwrite or not os.path.exists(path):
+        path = convert_path(path)
+        with open(path, "w") as fh:
+            fh.write(contents)
+        return True
+
+    return False
+
+
+def make_symlink(source: str, link_path: str) -> None:
+    """
+    Create a symlink at `link_path` referring to `source`.
+    """
+    if not supports_symlinks():
+        dbt.exceptions.system_error("create a symbolic link")
+
+    os.symlink(source, link_path)
+
+
+def supports_symlinks() -> bool:
+    return getattr(os, "symlink", None) is not None
+
+
+def write_file(path: str, contents: str = "") -> bool:
+    path = convert_path(path)
+    try:
+        make_directory(os.path.dirname(path))
+        with open(path, "w", encoding="utf-8") as f:
+            f.write(str(contents))
+    except Exception as exc:
+        # note that you can't just catch FileNotFound, because sometimes
+        # windows apparently raises something else.
+        # It's also not sufficient to look at the path length, because
+        # sometimes windows fails to write paths that are less than the length
+        # limit. So on windows, suppress all errors that happen from writing
+        # to disk.
+        if os.name == "nt":
+            # sometimes we get a winerror of 3 which means the path was
+            # definitely too long, but other times we don't and it means the
+            # path was just probably too long. This is probably based on the
+            # windows/python version.
+            if getattr(exc, "winerror", 0) == 3:
+                reason = "Path was too long"
+            else:
+                reason = "Path was possibly too long"
+            # all our hard work and the path was still too long. Log and
+            # continue.
+            fire_event(SystemCouldNotWrite(path=path, reason=reason, exc=exc))
+        else:
+            raise
+    return True
+
+
+def read_json(path: str) -> Dict[str, Any]:
+    return json.loads(load_file_contents(path))
+
+
+def write_json(path: str, data: Dict[str, Any]) -> bool:
+    return write_file(path, json.dumps(data, cls=dbt.utils.JSONEncoder))
+
+
+def _windows_rmdir_readonly(func: Callable[[str], Any], path: str, exc: Tuple[Any, OSError, Any]):
+    exception_val = exc[1]
+    if exception_val.errno == errno.EACCES:
+        os.chmod(path, stat.S_IWUSR)
+        func(path)
+    else:
+        raise
+
+
+def resolve_path_from_base(path_to_resolve: str, base_path: str) -> str:
+    """
+    If path-to_resolve is a relative path, create an absolute path
+    with base_path as the base.
+
+    If path_to_resolve is an absolute path or a user path (~), just
+    resolve it to an absolute path and return.
+    """
+    return os.path.abspath(os.path.join(base_path, os.path.expanduser(path_to_resolve)))
+
+
+def rmdir(path: str) -> None:
+    """
+    Recursively deletes a directory. Includes an error handler to retry with
+    different permissions on Windows. Otherwise, removing directories (eg.
+    cloned via git) can cause rmtree to throw a PermissionError exception
+    """
+    path = convert_path(path)
+    if sys.platform == "win32":
+        onerror = _windows_rmdir_readonly
+    else:
+        onerror = None
+
+    shutil.rmtree(path, onerror=onerror)
+
+
+def _win_prepare_path(path: str) -> str:
+    """Given a windows path, prepare it for use by making sure it is absolute
+    and normalized.
+    """
+    path = os.path.normpath(path)
+
+    # if a path starts with '\', splitdrive() on it will return '' for the
+    # drive, but the prefix requires a drive letter. So let's add the drive
+    # letter back in.
+    # Unless it starts with '\\'. In that case, the path is a UNC mount point
+    # and splitdrive will be fine.
+    if not path.startswith("\\\\") and path.startswith("\\"):
+        curdrive = os.path.splitdrive(os.getcwd())[0]
+        path = curdrive + path
+
+    # now our path is either an absolute UNC path or relative to the current
+    # directory. If it's relative, we need to make it absolute or the prefix
+    # won't work. `ntpath.abspath` allegedly doesn't always play nice with long
+    # paths, so do this instead.
+    if not os.path.splitdrive(path)[0]:
+        path = os.path.join(os.getcwd(), path)
+
+    return path
+
+
+def _supports_long_paths() -> bool:
+    if sys.platform != "win32":
+        return True
+    # Eryk Sun says to use `WinDLL('ntdll')` instead of `windll.ntdll` because
+    # of pointer caching in a comment here:
+    # https://stackoverflow.com/a/35097999/11262881
+    # I don't know exaclty what he means, but I am inclined to believe him as
+    # he's pretty active on Python windows bugs!
+    try:
+        dll = WinDLL("ntdll")
+    except OSError:  # I don't think this happens? you need ntdll to run python
+        return False
+    # not all windows versions have it at all
+    if not hasattr(dll, "RtlAreLongPathsEnabled"):
+        return False
+    # tell windows we want to get back a single unsigned byte (a bool).
+    dll.RtlAreLongPathsEnabled.restype = c_bool
+    return dll.RtlAreLongPathsEnabled()
+
+
+def convert_path(path: str) -> str:
+    """Convert a path that dbt has, which might be >260 characters long, to one
+    that will be writable/readable on Windows.
+
+    On other platforms, this is a no-op.
+    """
+    # some parts of python seem to append '\*.*' to strings, better safe than
+    # sorry.
+    if len(path) < 250:
+        return path
+    if _supports_long_paths():
+        return path
+
+    prefix = "\\\\?\\"
+    # Nothing to do
+    if path.startswith(prefix):
+        return path
+
+    path = _win_prepare_path(path)
+
+    # add the prefix. The check is just in case os.getcwd() does something
+    # unexpected - I believe this if-state should always be True though!
+    if not path.startswith(prefix):
+        path = prefix + path
+    return path
+
+
+def remove_file(path: str) -> None:
+    path = convert_path(path)
+    os.remove(path)
+
+
+def path_exists(path: str) -> bool:
+    path = convert_path(path)
+    return os.path.lexists(path)
+
+
+def path_is_symlink(path: str) -> bool:
+    path = convert_path(path)
+    return os.path.islink(path)
+
+
+def open_dir_cmd() -> str:
+    # https://docs.python.org/2/library/sys.html#sys.platform
+    if sys.platform == "win32":
+        return "start"
+
+    elif sys.platform == "darwin":
+        return "open"
+
+    else:
+        return "xdg-open"
+
+
+def _handle_posix_cwd_error(exc: OSError, cwd: str, cmd: List[str]) -> NoReturn:
+    if exc.errno == errno.ENOENT:
+        message = "Directory does not exist"
+    elif exc.errno == errno.EACCES:
+        message = "Current user cannot access directory, check permissions"
+    elif exc.errno == errno.ENOTDIR:
+        message = "Not a directory"
+    else:
+        message = "Unknown OSError: {} - cwd".format(str(exc))
+    raise dbt.exceptions.WorkingDirectoryError(cwd, cmd, message)
+
+
+def _handle_posix_cmd_error(exc: OSError, cwd: str, cmd: List[str]) -> NoReturn:
+    if exc.errno == errno.ENOENT:
+        message = "Could not find command, ensure it is in the user's PATH"
+    elif exc.errno == errno.EACCES:
+        message = "User does not have permissions for this command"
+    else:
+        message = "Unknown OSError: {} - cmd".format(str(exc))
+    raise dbt.exceptions.ExecutableError(cwd, cmd, message)
+
+
+def _handle_posix_error(exc: OSError, cwd: str, cmd: List[str]) -> NoReturn:
+    """OSError handling for POSIX systems.
+
+    Some things that could happen to trigger an OSError:
+        - cwd could not exist
+            - exc.errno == ENOENT
+            - exc.filename == cwd
+        - cwd could have permissions that prevent the current user moving to it
+            - exc.errno == EACCES
+            - exc.filename == cwd
+        - cwd could exist but not be a directory
+            - exc.errno == ENOTDIR
+            - exc.filename == cwd
+        - cmd[0] could not exist
+            - exc.errno == ENOENT
+            - exc.filename == None(?)
+        - cmd[0] could exist but have permissions that prevents the current
+            user from executing it (executable bit not set for the user)
+            - exc.errno == EACCES
+            - exc.filename == None(?)
+    """
+    if getattr(exc, "filename", None) == cwd:
+        _handle_posix_cwd_error(exc, cwd, cmd)
+    else:
+        _handle_posix_cmd_error(exc, cwd, cmd)
+
+
+def _handle_windows_error(exc: OSError, cwd: str, cmd: List[str]) -> NoReturn:
+    cls: Type[dbt.exceptions.Exception] = dbt.exceptions.CommandError
+    if exc.errno == errno.ENOENT:
+        message = (
+            "Could not find command, ensure it is in the user's PATH "
+            "and that the user has permissions to run it"
+        )
+        cls = dbt.exceptions.ExecutableError
+    elif exc.errno == errno.ENOEXEC:
+        message = "Command was not executable, ensure it is valid"
+        cls = dbt.exceptions.ExecutableError
+    elif exc.errno == errno.ENOTDIR:
+        message = (
+            "Unable to cd: path does not exist, user does not have"
+            " permissions, or not a directory"
+        )
+        cls = dbt.exceptions.WorkingDirectoryError
+    else:
+        message = 'Unknown error: {} (errno={}: "{}")'.format(
+            str(exc), exc.errno, errno.errorcode.get(exc.errno, "<Unknown!>")
+        )
+    raise cls(cwd, cmd, message)
+
+
+def _interpret_oserror(exc: OSError, cwd: str, cmd: List[str]) -> NoReturn:
+    """Interpret an OSError exception and raise the appropriate dbt exception."""
+    if len(cmd) == 0:
+        raise dbt.exceptions.CommandError(cwd, cmd)
+
+    # all of these functions raise unconditionally
+    if os.name == "nt":
+        _handle_windows_error(exc, cwd, cmd)
+    else:
+        _handle_posix_error(exc, cwd, cmd)
+
+    # this should not be reachable, raise _something_ at least!
+    raise dbt.exceptions.InternalException(
+        "Unhandled exception in _interpret_oserror: {}".format(exc)
+    )
+
+
+def run_cmd(cwd: str, cmd: List[str], env: Optional[Dict[str, Any]] = None) -> Tuple[bytes, bytes]:
+    fire_event(SystemExecutingCmd(cmd=cmd))
+    if len(cmd) == 0:
+        raise dbt.exceptions.CommandError(cwd, cmd)
+
+    # the env argument replaces the environment entirely, which has exciting
+    # consequences on Windows! Do an update instead.
+    full_env = env
+    if env is not None:
+        full_env = os.environ.copy()
+        full_env.update(env)
+
+    try:
+        exe_pth = shutil.which(cmd[0])
+        if exe_pth:
+            cmd = [os.path.abspath(exe_pth)] + list(cmd[1:])
+        proc = subprocess.Popen(
+            cmd, cwd=cwd, stdout=subprocess.PIPE, stderr=subprocess.PIPE, env=full_env
+        )
+
+        out, err = proc.communicate()
+    except OSError as exc:
+        _interpret_oserror(exc, cwd, cmd)
+
+    fire_event(SystemStdOutMsg(bmsg=out))
+    fire_event(SystemStdErrMsg(bmsg=err))
+
+    if proc.returncode != 0:
+        fire_event(SystemReportReturnCode(returncode=proc.returncode))
+        raise dbt.exceptions.CommandResultError(cwd, cmd, proc.returncode, out, err)
+
+    return out, err
+
+
+def download_with_retries(
+    url: str, path: str, timeout: Optional[Union[float, tuple]] = None
+) -> None:
+    download_fn = functools.partial(download, url, path, timeout)
+    connection_exception_retry(download_fn, 5)
+
+
+def download(url: str, path: str, timeout: Optional[Union[float, tuple]] = None) -> None:
+    path = convert_path(path)
+    connection_timeout = timeout or float(os.getenv("DBT_HTTP_TIMEOUT", 10))
+    response = requests.get(url, timeout=connection_timeout)
+    with open(path, "wb") as handle:
+        for block in response.iter_content(1024 * 64):
+            handle.write(block)
+
+
+def rename(from_path: str, to_path: str, force: bool = False) -> None:
+    from_path = convert_path(from_path)
+    to_path = convert_path(to_path)
+    is_symlink = path_is_symlink(to_path)
+
+    if os.path.exists(to_path) and force:
+        if is_symlink:
+            remove_file(to_path)
+        else:
+            rmdir(to_path)
+
+    shutil.move(from_path, to_path)
+
+
+def untar_package(tar_path: str, dest_dir: str, rename_to: Optional[str] = None) -> None:
+    tar_path = convert_path(tar_path)
+    tar_dir_name = None
+    with tarfile.open(tar_path, "r:gz") as tarball:
+        tarball.extractall(dest_dir)
+        tar_dir_name = os.path.commonprefix(tarball.getnames())
+    if rename_to:
+        downloaded_path = os.path.join(dest_dir, tar_dir_name)
+        desired_path = os.path.join(dest_dir, rename_to)
+        dbt.clients.system.rename(downloaded_path, desired_path, force=True)
+
+
+def chmod_and_retry(func, path, exc_info):
+    """Define an error handler to pass to shutil.rmtree.
+    On Windows, when a file is marked read-only as git likes to do, rmtree will
+    fail. To handle that, on errors try to make the file writable.
+    We want to retry most operations here, but listdir is one that we know will
+    be useless.
+    """
+    if func is os.listdir or os.name != "nt":
+        raise
+    os.chmod(path, stat.S_IREAD | stat.S_IWRITE)
+    # on error,this will raise.
+    func(path)
+
+
+def _absnorm(path):
+    return os.path.normcase(os.path.abspath(path))
+
+
+def move(src, dst):
+    """A re-implementation of shutil.move that properly removes the source
+    directory on windows when it has read-only files in it and the move is
+    between two drives.
+
+    This is almost identical to the real shutil.move, except it, uses our rmtree
+    and skips handling non-windows OSes since the existing one works ok there.
+    """
+    src = convert_path(src)
+    dst = convert_path(dst)
+    if os.name != "nt":
+        return shutil.move(src, dst)
+
+    if os.path.isdir(dst):
+        if _absnorm(src) == _absnorm(dst):
+            os.rename(src, dst)
+            return
+
+        dst = os.path.join(dst, os.path.basename(src.rstrip("/\\")))
+        if os.path.exists(dst):
+            raise EnvironmentError("Path '{}' already exists".format(dst))
+
+    try:
+        os.rename(src, dst)
+    except OSError:
+        # probably different drives
+        if os.path.isdir(src):
+            if _absnorm(dst + "\\").startswith(_absnorm(src + "\\")):
+                # dst is inside src
+                raise EnvironmentError(
+                    "Cannot move a directory '{}' into itself '{}'".format(src, dst)
+                )
+            shutil.copytree(src, dst, symlinks=True)
+            rmtree(src)
+        else:
+            shutil.copy2(src, dst)
+            os.unlink(src)
+
+
+def rmtree(path):
+    """Recursively remove the path. On permissions errors on windows, try to remove
+    the read-only flag and try again.
+    """
+    path = convert_path(path)
+    return shutil.rmtree(path, onerror=chmod_and_retry)

core/dbt/clients/yaml_helper.py

@@ -0,0 +1,63 @@
+import dbt.exceptions
+from typing import Any, Dict, Optional
+import yaml
+
+# the C version is faster, but it doesn't always exist
+try:
+    from yaml import CLoader as Loader, CSafeLoader as SafeLoader, CDumper as Dumper
+except ImportError:
+    from yaml import Loader, SafeLoader, Dumper  # type: ignore  # noqa: F401
+
+
+YAML_ERROR_MESSAGE = """
+Syntax error near line {line_number}
+------------------------------
+{nice_error}
+
+Raw Error:
+------------------------------
+{raw_error}
+""".strip()
+
+
+def line_no(i, line, width=3):
+    line_number = str(i).ljust(width)
+    return "{}| {}".format(line_number, line)
+
+
+def prefix_with_line_numbers(string, no_start, no_end):
+    line_list = string.split("\n")
+
+    numbers = range(no_start, no_end)
+    relevant_lines = line_list[no_start:no_end]
+
+    return "\n".join([line_no(i + 1, line) for (i, line) in zip(numbers, relevant_lines)])
+
+
+def contextualized_yaml_error(raw_contents, error):
+    mark = error.problem_mark
+
+    min_line = max(mark.line - 3, 0)
+    max_line = mark.line + 4
+
+    nice_error = prefix_with_line_numbers(raw_contents, min_line, max_line)
+
+    return YAML_ERROR_MESSAGE.format(
+        line_number=mark.line + 1, nice_error=nice_error, raw_error=error
+    )
+
+
+def safe_load(contents) -> Optional[Dict[str, Any]]:
+    return yaml.load(contents, Loader=SafeLoader)
+
+
+def load_yaml_text(contents):
+    try:
+        return safe_load(contents)
+    except (yaml.scanner.ScannerError, yaml.YAMLError) as e:
+        if hasattr(e, "problem_mark"):
+            error = contextualized_yaml_error(contents, e)
+        else:
+            error = str(e)
+
+        raise dbt.exceptions.ValidationException(error)

core/dbt/compilation.py

@@ -0,0 +1,518 @@
+import os
+from collections import defaultdict
+from typing import List, Dict, Any, Tuple, cast, Optional
+
+import networkx as nx  # type: ignore
+import pickle
+import sqlparse
+
+from dbt import flags
+from dbt.adapters.factory import get_adapter
+from dbt.clients import jinja
+from dbt.clients.system import make_directory
+from dbt.context.providers import generate_runtime_model_context
+from dbt.contracts.graph.manifest import Manifest, UniqueID
+from dbt.contracts.graph.compiled import (
+    COMPILED_TYPES,
+    CompiledGenericTestNode,
+    GraphMemberNode,
+    InjectedCTE,
+    ManifestNode,
+    NonSourceCompiledNode,
+)
+from dbt.contracts.graph.parsed import ParsedNode
+from dbt.exceptions import (
+    dependency_not_found,
+    InternalException,
+    RuntimeException,
+)
+from dbt.graph import Graph
+from dbt.events.functions import fire_event
+from dbt.events.types import FoundStats, CompilingNode, WritingInjectedSQLForNode
+from dbt.node_types import NodeType
+from dbt.events.format import pluralize
+import dbt.tracking
+
+graph_file_name = "graph.gpickle"
+
+
+def _compiled_type_for(model: ParsedNode):
+    if type(model) not in COMPILED_TYPES:
+        raise InternalException(
+            f"Asked to compile {type(model)} node, but it has no compiled form"
+        )
+    return COMPILED_TYPES[type(model)]
+
+
+def print_compile_stats(stats):
+    names = {
+        NodeType.Model: "model",
+        NodeType.Test: "test",
+        NodeType.Snapshot: "snapshot",
+        NodeType.Analysis: "analysis",
+        NodeType.Macro: "macro",
+        NodeType.Operation: "operation",
+        NodeType.Seed: "seed file",
+        NodeType.Source: "source",
+        NodeType.Exposure: "exposure",
+        NodeType.Metric: "metric",
+    }
+
+    results = {k: 0 for k in names.keys()}
+    results.update(stats)
+
+    # create tracking event for resource_counts
+    if dbt.tracking.active_user is not None:
+        resource_counts = {k.pluralize(): v for k, v in results.items()}
+        dbt.tracking.track_resource_counts(resource_counts)
+
+    stat_line = ", ".join([pluralize(ct, names.get(t)) for t, ct in results.items() if t in names])
+
+    fire_event(FoundStats(stat_line=stat_line))
+
+
+def _node_enabled(node: ManifestNode):
+    # Disabled models are already excluded from the manifest
+    if node.resource_type == NodeType.Test and not node.config.enabled:
+        return False
+    else:
+        return True
+
+
+def _generate_stats(manifest: Manifest):
+    stats: Dict[NodeType, int] = defaultdict(int)
+    for node in manifest.nodes.values():
+        if _node_enabled(node):
+            stats[node.resource_type] += 1
+
+    for source in manifest.sources.values():
+        stats[source.resource_type] += 1
+    for exposure in manifest.exposures.values():
+        stats[exposure.resource_type] += 1
+    for metric in manifest.metrics.values():
+        stats[metric.resource_type] += 1
+    for macro in manifest.macros.values():
+        stats[macro.resource_type] += 1
+    return stats
+
+
+def _add_prepended_cte(prepended_ctes, new_cte):
+    for cte in prepended_ctes:
+        if cte.id == new_cte.id:
+            cte.sql = new_cte.sql
+            return
+    prepended_ctes.append(new_cte)
+
+
+def _extend_prepended_ctes(prepended_ctes, new_prepended_ctes):
+    for new_cte in new_prepended_ctes:
+        _add_prepended_cte(prepended_ctes, new_cte)
+
+
+def _get_tests_for_node(manifest: Manifest, unique_id: UniqueID) -> List[UniqueID]:
+    """Get a list of tests that depend on the node with the
+    provided unique id"""
+
+    tests = []
+    if unique_id in manifest.child_map:
+        for child_unique_id in manifest.child_map[unique_id]:
+            if child_unique_id.startswith("test."):
+                tests.append(child_unique_id)
+
+    return tests
+
+
+class Linker:
+    def __init__(self, data=None):
+        if data is None:
+            data = {}
+        self.graph = nx.DiGraph(**data)
+
+    def edges(self):
+        return self.graph.edges()
+
+    def nodes(self):
+        return self.graph.nodes()
+
+    def find_cycles(self):
+        try:
+            cycle = nx.find_cycle(self.graph)
+        except nx.NetworkXNoCycle:
+            return None
+        else:
+            # cycles is a List[Tuple[str, ...]]
+            return " --> ".join(c[0] for c in cycle)
+
+    def dependency(self, node1, node2):
+        "indicate that node1 depends on node2"
+        self.graph.add_node(node1)
+        self.graph.add_node(node2)
+        self.graph.add_edge(node2, node1)
+
+    def add_node(self, node):
+        self.graph.add_node(node)
+
+    def write_graph(self, outfile: str, manifest: Manifest):
+        """Write the graph to a gpickle file. Before doing so, serialize and
+        include all nodes in their corresponding graph entries.
+        """
+        out_graph = self.graph.copy()
+        for node_id in self.graph:
+            data = manifest.expect(node_id).to_dict(omit_none=True)
+            out_graph.add_node(node_id, **data)
+        with open(outfile, "wb") as outfh:
+            pickle.dump(out_graph, outfh, protocol=pickle.HIGHEST_PROTOCOL)
+
+
+class Compiler:
+    def __init__(self, config):
+        self.config = config
+
+    def initialize(self):
+        make_directory(self.config.target_path)
+        make_directory(self.config.packages_install_path)
+
+    # creates a ModelContext which is converted to
+    # a dict for jinja rendering of SQL
+    def _create_node_context(
+        self,
+        node: NonSourceCompiledNode,
+        manifest: Manifest,
+        extra_context: Dict[str, Any],
+    ) -> Dict[str, Any]:
+
+        context = generate_runtime_model_context(node, self.config, manifest)
+        context.update(extra_context)
+        if isinstance(node, CompiledGenericTestNode):
+            # for test nodes, add a special keyword args value to the context
+            jinja.add_rendered_test_kwargs(context, node)
+
+        return context
+
+    def add_ephemeral_prefix(self, name: str):
+        adapter = get_adapter(self.config)
+        relation_cls = adapter.Relation
+        return relation_cls.add_ephemeral_prefix(name)
+
+    def _get_relation_name(self, node: ParsedNode):
+        relation_name = None
+        if node.is_relational and not node.is_ephemeral_model:
+            adapter = get_adapter(self.config)
+            relation_cls = adapter.Relation
+            relation_name = str(relation_cls.create_from(self.config, node))
+        return relation_name
+
+    def _inject_ctes_into_sql(self, sql: str, ctes: List[InjectedCTE]) -> str:
+        """
+        `ctes` is a list of InjectedCTEs like:
+
+            [
+                InjectedCTE(
+                    id="cte_id_1",
+                    sql="__dbt__cte__ephemeral as (select * from table)",
+                ),
+                InjectedCTE(
+                    id="cte_id_2",
+                    sql="__dbt__cte__events as (select id, type from events)",
+                ),
+            ]
+
+        Given `sql` like:
+
+          "with internal_cte as (select * from sessions)
+           select * from internal_cte"
+
+        This will spit out:
+
+          "with __dbt__cte__ephemeral as (select * from table),
+                __dbt__cte__events as (select id, type from events),
+                with internal_cte as (select * from sessions)
+           select * from internal_cte"
+
+        (Whitespace enhanced for readability.)
+        """
+        if len(ctes) == 0:
+            return sql
+
+        parsed_stmts = sqlparse.parse(sql)
+        parsed = parsed_stmts[0]
+
+        with_stmt = None
+        for token in parsed.tokens:
+            if token.is_keyword and token.normalized == "WITH":
+                with_stmt = token
+                break
+
+        if with_stmt is None:
+            # no with stmt, add one, and inject CTEs right at the beginning
+            first_token = parsed.token_first()
+            with_stmt = sqlparse.sql.Token(sqlparse.tokens.Keyword, "with")
+            parsed.insert_before(first_token, with_stmt)
+        else:
+            # stmt exists, add a comma (which will come after injected CTEs)
+            trailing_comma = sqlparse.sql.Token(sqlparse.tokens.Punctuation, ",")
+            parsed.insert_after(with_stmt, trailing_comma)
+
+        token = sqlparse.sql.Token(sqlparse.tokens.Keyword, ", ".join(c.sql for c in ctes))
+        parsed.insert_after(with_stmt, token)
+
+        return str(parsed)
+
+    def _recursively_prepend_ctes(
+        self,
+        model: NonSourceCompiledNode,
+        manifest: Manifest,
+        extra_context: Optional[Dict[str, Any]],
+    ) -> Tuple[NonSourceCompiledNode, List[InjectedCTE]]:
+        """This method is called by the 'compile_node' method. Starting
+        from the node that it is passed in, it will recursively call
+        itself using the 'extra_ctes'.  The 'ephemeral' models do
+        not produce SQL that is executed directly, instead they
+        are rolled up into the models that refer to them by
+        inserting CTEs into the SQL.
+        """
+        if model.compiled_sql is None:
+            raise RuntimeException("Cannot inject ctes into an unparsed node", model)
+        if model.extra_ctes_injected:
+            return (model, model.extra_ctes)
+
+        # Just to make it plain that nothing is actually injected for this case
+        if not model.extra_ctes:
+            model.extra_ctes_injected = True
+            manifest.update_node(model)
+            return (model, model.extra_ctes)
+
+        # This stores the ctes which will all be recursively
+        # gathered and then "injected" into the model.
+        prepended_ctes: List[InjectedCTE] = []
+
+        # extra_ctes are added to the model by
+        # RuntimeRefResolver.create_relation, which adds an
+        # extra_cte for every model relation which is an
+        # ephemeral model.
+        for cte in model.extra_ctes:
+            if cte.id not in manifest.nodes:
+                raise InternalException(
+                    f"During compilation, found a cte reference that "
+                    f"could not be resolved: {cte.id}"
+                )
+            cte_model = manifest.nodes[cte.id]
+
+            if not cte_model.is_ephemeral_model:
+                raise InternalException(f"{cte.id} is not ephemeral")
+
+            # This model has already been compiled, so it's been
+            # through here before
+            if getattr(cte_model, "compiled", False):
+                assert isinstance(cte_model, tuple(COMPILED_TYPES.values()))
+                cte_model = cast(NonSourceCompiledNode, cte_model)
+                new_prepended_ctes = cte_model.extra_ctes
+
+            # if the cte_model isn't compiled, i.e. first time here
+            else:
+                # This is an ephemeral parsed model that we can compile.
+                # Compile and update the node
+                cte_model = self._compile_node(cte_model, manifest, extra_context)
+                # recursively call this method
+                cte_model, new_prepended_ctes = self._recursively_prepend_ctes(
+                    cte_model, manifest, extra_context
+                )
+                # Save compiled SQL file and sync manifest
+                self._write_node(cte_model)
+                manifest.sync_update_node(cte_model)
+
+            _extend_prepended_ctes(prepended_ctes, new_prepended_ctes)
+
+            new_cte_name = self.add_ephemeral_prefix(cte_model.name)
+            rendered_sql = cte_model._pre_injected_sql or cte_model.compiled_sql
+            sql = f" {new_cte_name} as (\n{rendered_sql}\n)"
+
+            _add_prepended_cte(prepended_ctes, InjectedCTE(id=cte.id, sql=sql))
+
+        injected_sql = self._inject_ctes_into_sql(
+            model.compiled_sql,
+            prepended_ctes,
+        )
+        model._pre_injected_sql = model.compiled_sql
+        model.compiled_sql = injected_sql
+        model.extra_ctes_injected = True
+        model.extra_ctes = prepended_ctes
+        model.validate(model.to_dict(omit_none=True))
+
+        manifest.update_node(model)
+
+        return model, prepended_ctes
+
+    # creates a compiled_node from the ManifestNode passed in,
+    # creates a "context" dictionary for jinja rendering,
+    # and then renders the "compiled_sql" using the node, the
+    # raw_sql and the context.
+    def _compile_node(
+        self,
+        node: ManifestNode,
+        manifest: Manifest,
+        extra_context: Optional[Dict[str, Any]] = None,
+    ) -> NonSourceCompiledNode:
+        if extra_context is None:
+            extra_context = {}
+
+        fire_event(CompilingNode(unique_id=node.unique_id))
+
+        data = node.to_dict(omit_none=True)
+        data.update(
+            {
+                "compiled": False,
+                "compiled_sql": None,
+                "extra_ctes_injected": False,
+                "extra_ctes": [],
+            }
+        )
+        compiled_node = _compiled_type_for(node).from_dict(data)
+
+        context = self._create_node_context(compiled_node, manifest, extra_context)
+
+        compiled_node.compiled_sql = jinja.get_rendered(
+            node.raw_sql,
+            context,
+            node,
+        )
+
+        compiled_node.relation_name = self._get_relation_name(node)
+
+        compiled_node.compiled = True
+
+        return compiled_node
+
+    def write_graph_file(self, linker: Linker, manifest: Manifest):
+        filename = graph_file_name
+        graph_path = os.path.join(self.config.target_path, filename)
+        if flags.WRITE_JSON:
+            linker.write_graph(graph_path, manifest)
+
+    def link_node(self, linker: Linker, node: GraphMemberNode, manifest: Manifest):
+        linker.add_node(node.unique_id)
+
+        for dependency in node.depends_on_nodes:
+            if dependency in manifest.nodes:
+                linker.dependency(node.unique_id, (manifest.nodes[dependency].unique_id))
+            elif dependency in manifest.sources:
+                linker.dependency(node.unique_id, (manifest.sources[dependency].unique_id))
+            else:
+                dependency_not_found(node, dependency)
+
+    def link_graph(self, linker: Linker, manifest: Manifest, add_test_edges: bool = False):
+        for source in manifest.sources.values():
+            linker.add_node(source.unique_id)
+        for node in manifest.nodes.values():
+            self.link_node(linker, node, manifest)
+        for exposure in manifest.exposures.values():
+            self.link_node(linker, exposure, manifest)
+        for metric in manifest.metrics.values():
+            self.link_node(linker, metric, manifest)
+
+        cycle = linker.find_cycles()
+
+        if cycle:
+            raise RuntimeError("Found a cycle: {}".format(cycle))
+
+        if add_test_edges:
+            manifest.build_parent_and_child_maps()
+            self.add_test_edges(linker, manifest)
+
+    def add_test_edges(self, linker: Linker, manifest: Manifest) -> None:
+        """This method adds additional edges to the DAG. For a given non-test
+        executable node, add an edge from an upstream test to the given node if
+        the set of nodes the test depends on is a subset of the upstream nodes
+        for the given node."""
+
+        # Given a graph:
+        # model1 --> model2 --> model3
+        #   |             |
+        #   |            \/
+        #  \/          test 2
+        # test1
+        #
+        # Produce the following graph:
+        # model1 --> model2 --> model3
+        #   |       /\    |      /\ /\
+        #   |       |    \/      |  |
+        #  \/       |  test2 ----|  |
+        # test1 ----|---------------|
+
+        for node_id in linker.graph:
+            # If node is executable (in manifest.nodes) and does _not_
+            # represent a test, continue.
+            if (
+                node_id in manifest.nodes
+                and manifest.nodes[node_id].resource_type != NodeType.Test
+            ):
+                # Get *everything* upstream of the node
+                all_upstream_nodes = nx.traversal.bfs_tree(linker.graph, node_id, reverse=True)
+                # Get the set of upstream nodes not including the current node.
+                upstream_nodes = set([n for n in all_upstream_nodes if n != node_id])
+
+                # Get all tests that depend on any upstream nodes.
+                upstream_tests = []
+                for upstream_node in upstream_nodes:
+                    upstream_tests += _get_tests_for_node(manifest, upstream_node)
+
+                for upstream_test in upstream_tests:
+                    # Get the set of all nodes that the test depends on
+                    # including the upstream_node itself. This is necessary
+                    # because tests can depend on multiple nodes (ex:
+                    # relationship tests). Test nodes do not distinguish
+                    # between what node the test is "testing" and what
+                    # node(s) it depends on.
+                    test_depends_on = set(manifest.nodes[upstream_test].depends_on_nodes)
+
+                    # If the set of nodes that an upstream test depends on
+                    # is a subset of all upstream nodes of the current node,
+                    # add an edge from the upstream test to the current node.
+                    if test_depends_on.issubset(upstream_nodes):
+                        linker.graph.add_edge(upstream_test, node_id)
+
+    def compile(self, manifest: Manifest, write=True, add_test_edges=False) -> Graph:
+        self.initialize()
+        linker = Linker()
+
+        self.link_graph(linker, manifest, add_test_edges)
+
+        stats = _generate_stats(manifest)
+
+        if write:
+            self.write_graph_file(linker, manifest)
+        print_compile_stats(stats)
+
+        return Graph(linker.graph)
+
+    # writes the "compiled_sql" into the target/compiled directory
+    def _write_node(self, node: NonSourceCompiledNode) -> ManifestNode:
+        if not node.extra_ctes_injected or node.resource_type == NodeType.Snapshot:
+            return node
+        fire_event(WritingInjectedSQLForNode(unique_id=node.unique_id))
+
+        if node.compiled_sql:
+            node.compiled_path = node.write_node(
+                self.config.target_path, "compiled", node.compiled_sql
+            )
+        return node
+
+    def compile_node(
+        self,
+        node: ManifestNode,
+        manifest: Manifest,
+        extra_context: Optional[Dict[str, Any]] = None,
+        write: bool = True,
+    ) -> NonSourceCompiledNode:
+        """This is the main entry point into this code. It's called by
+        CompileRunner.compile, GenericRPCRunner.compile, and
+        RunTask.get_hook_sql. It calls '_compile_node' to convert
+        the node into a compiled node, and then calls the
+        recursive method to "prepend" the ctes.
+        """
+        node = self._compile_node(node, manifest, extra_context)
+
+        node, _ = self._recursively_prepend_ctes(node, manifest, extra_context)
+        if write:
+            self._write_node(node)
+        return node

core/dbt/config/README.md

@@ -0,0 +1 @@
+# Config README

core/dbt/config/__init__.py

@@ -0,0 +1,4 @@
+# all these are just exports, they need "noqa" so flake8 will not complain.
+from .profile import Profile, read_user_config  # noqa
+from .project import Project, IsFQNResource  # noqa
+from .runtime import RuntimeConfig, UnsetProfileConfig  # noqa

core/dbt/config/profile.py

@@ -0,0 +1,434 @@
+from dataclasses import dataclass
+from typing import Any, Dict, Optional, Tuple
+import os
+
+from dbt.dataclass_schema import ValidationError
+
+from dbt import flags
+from dbt.clients.system import load_file_contents
+from dbt.clients.yaml_helper import load_yaml_text
+from dbt.contracts.connection import Credentials, HasCredentials
+from dbt.contracts.project import ProfileConfig, UserConfig
+from dbt.exceptions import CompilationException
+from dbt.exceptions import DbtProfileError
+from dbt.exceptions import DbtProjectError
+from dbt.exceptions import ValidationException
+from dbt.exceptions import RuntimeException
+from dbt.exceptions import validator_error_message
+from dbt.events.types import MissingProfileTarget
+from dbt.events.functions import fire_event
+from dbt.utils import coerce_dict_str
+
+from .renderer import ProfileRenderer
+
+DEFAULT_THREADS = 1
+
+DEFAULT_PROFILES_DIR = os.path.join(os.path.expanduser("~"), ".dbt")
+
+INVALID_PROFILE_MESSAGE = """
+dbt encountered an error while trying to read your profiles.yml file.
+
+{error_string}
+"""
+
+
+NO_SUPPLIED_PROFILE_ERROR = """\
+dbt cannot run because no profile was specified for this dbt project.
+To specify a profile for this project, add a line like the this to
+your dbt_project.yml file:
+
+profile: [profile name]
+
+Here, [profile name] should be replaced with a profile name
+defined in your profiles.yml file. You can find profiles.yml here:
+
+{profiles_file}/profiles.yml
+""".format(
+    profiles_file=DEFAULT_PROFILES_DIR
+)
+
+
+def read_profile(profiles_dir: str) -> Dict[str, Any]:
+    path = os.path.join(profiles_dir, "profiles.yml")
+
+    contents = None
+    if os.path.isfile(path):
+        try:
+            contents = load_file_contents(path, strip=False)
+            yaml_content = load_yaml_text(contents)
+            if not yaml_content:
+                msg = f"The profiles.yml file at {path} is empty"
+                raise DbtProfileError(INVALID_PROFILE_MESSAGE.format(error_string=msg))
+            return yaml_content
+        except ValidationException as e:
+            msg = INVALID_PROFILE_MESSAGE.format(error_string=e)
+            raise ValidationException(msg) from e
+
+    return {}
+
+
+def read_user_config(directory: str) -> UserConfig:
+    try:
+        profile = read_profile(directory)
+        if profile:
+            user_config = coerce_dict_str(profile.get("config", {}))
+            if user_config is not None:
+                UserConfig.validate(user_config)
+                return UserConfig.from_dict(user_config)
+    except (RuntimeException, ValidationError):
+        pass
+    return UserConfig()
+
+
+# The Profile class is included in RuntimeConfig, so any attribute
+# additions must also be set where the RuntimeConfig class is created
+# `init=False` is a workaround for https://bugs.python.org/issue45081
+@dataclass(init=False)
+class Profile(HasCredentials):
+    profile_name: str
+    target_name: str
+    user_config: UserConfig
+    threads: int
+    credentials: Credentials
+    profile_env_vars: Dict[str, Any]
+
+    def __init__(
+        self,
+        profile_name: str,
+        target_name: str,
+        user_config: UserConfig,
+        threads: int,
+        credentials: Credentials,
+    ):
+        """Explicitly defining `__init__` to work around bug in Python 3.9.7
+        https://bugs.python.org/issue45081
+        """
+        self.profile_name = profile_name
+        self.target_name = target_name
+        self.user_config = user_config
+        self.threads = threads
+        self.credentials = credentials
+        self.profile_env_vars = {}  # never available on init
+
+    def to_profile_info(self, serialize_credentials: bool = False) -> Dict[str, Any]:
+        """Unlike to_project_config, this dict is not a mirror of any existing
+        on-disk data structure. It's used when creating a new profile from an
+        existing one.
+
+        :param serialize_credentials bool: If True, serialize the credentials.
+            Otherwise, the Credentials object will be copied.
+        :returns dict: The serialized profile.
+        """
+        result = {
+            "profile_name": self.profile_name,
+            "target_name": self.target_name,
+            "user_config": self.user_config,
+            "threads": self.threads,
+            "credentials": self.credentials,
+        }
+        if serialize_credentials:
+            result["user_config"] = self.user_config.to_dict(omit_none=True)
+            result["credentials"] = self.credentials.to_dict(omit_none=True)
+        return result
+
+    def to_target_dict(self) -> Dict[str, Any]:
+        target = dict(self.credentials.connection_info(with_aliases=True))
+        target.update(
+            {
+                "type": self.credentials.type,
+                "threads": self.threads,
+                "name": self.target_name,
+                "target_name": self.target_name,
+                "profile_name": self.profile_name,
+                "config": self.user_config.to_dict(omit_none=True),
+            }
+        )
+        return target
+
+    def __eq__(self, other: object) -> bool:
+        if not (isinstance(other, self.__class__) and isinstance(self, other.__class__)):
+            return NotImplemented
+        return self.to_profile_info() == other.to_profile_info()
+
+    def validate(self):
+        try:
+            if self.credentials:
+                dct = self.credentials.to_dict(omit_none=True)
+                self.credentials.validate(dct)
+            dct = self.to_profile_info(serialize_credentials=True)
+            ProfileConfig.validate(dct)
+        except ValidationError as exc:
+            raise DbtProfileError(validator_error_message(exc)) from exc
+
+    @staticmethod
+    def _credentials_from_profile(
+        profile: Dict[str, Any], profile_name: str, target_name: str
+    ) -> Credentials:
+        # avoid an import cycle
+        from dbt.adapters.factory import load_plugin
+
+        # credentials carry their 'type' in their actual type, not their
+        # attributes. We do want this in order to pick our Credentials class.
+        if "type" not in profile:
+            raise DbtProfileError(
+                'required field "type" not found in profile {} and target {}'.format(
+                    profile_name, target_name
+                )
+            )
+
+        typename = profile.pop("type")
+        try:
+            cls = load_plugin(typename)
+            data = cls.translate_aliases(profile)
+            cls.validate(data)
+            credentials = cls.from_dict(data)
+        except (RuntimeException, ValidationError) as e:
+            msg = str(e) if isinstance(e, RuntimeException) else e.message
+            raise DbtProfileError(
+                'Credentials in profile "{}", target "{}" invalid: {}'.format(
+                    profile_name, target_name, msg
+                )
+            ) from e
+
+        return credentials
+
+    @staticmethod
+    def pick_profile_name(
+        args_profile_name: Optional[str],
+        project_profile_name: Optional[str] = None,
+    ) -> str:
+        profile_name = project_profile_name
+        if args_profile_name is not None:
+            profile_name = args_profile_name
+        if profile_name is None:
+            raise DbtProjectError(NO_SUPPLIED_PROFILE_ERROR)
+        return profile_name
+
+    @staticmethod
+    def _get_profile_data(
+        profile: Dict[str, Any], profile_name: str, target_name: str
+    ) -> Dict[str, Any]:
+        if "outputs" not in profile:
+            raise DbtProfileError("outputs not specified in profile '{}'".format(profile_name))
+        outputs = profile["outputs"]
+
+        if target_name not in outputs:
+            outputs = "\n".join(" - {}".format(output) for output in outputs)
+            msg = (
+                "The profile '{}' does not have a target named '{}'. The "
+                "valid target names for this profile are:\n{}".format(
+                    profile_name, target_name, outputs
+                )
+            )
+            raise DbtProfileError(msg, result_type="invalid_target")
+        profile_data = outputs[target_name]
+
+        if not isinstance(profile_data, dict):
+            msg = (
+                f"output '{target_name}' of profile '{profile_name}' is "
+                f"misconfigured in profiles.yml"
+            )
+            raise DbtProfileError(msg, result_type="invalid_target")
+
+        return profile_data
+
+    @classmethod
+    def from_credentials(
+        cls,
+        credentials: Credentials,
+        threads: int,
+        profile_name: str,
+        target_name: str,
+        user_config: Optional[Dict[str, Any]] = None,
+    ) -> "Profile":
+        """Create a profile from an existing set of Credentials and the
+        remaining information.
+
+        :param credentials: The credentials dict for this profile.
+        :param threads: The number of threads to use for connections.
+        :param profile_name: The profile name used for this profile.
+        :param target_name: The target name used for this profile.
+        :param user_config: The user-level config block from the
+            raw profiles, if specified.
+        :raises DbtProfileError: If the profile is invalid.
+        :returns: The new Profile object.
+        """
+        if user_config is None:
+            user_config = {}
+        UserConfig.validate(user_config)
+        user_config_obj: UserConfig = UserConfig.from_dict(user_config)
+
+        profile = cls(
+            profile_name=profile_name,
+            target_name=target_name,
+            user_config=user_config_obj,
+            threads=threads,
+            credentials=credentials,
+        )
+        profile.validate()
+        return profile
+
+    @classmethod
+    def render_profile(
+        cls,
+        raw_profile: Dict[str, Any],
+        profile_name: str,
+        target_override: Optional[str],
+        renderer: ProfileRenderer,
+    ) -> Tuple[str, Dict[str, Any]]:
+        """This is a containment zone for the hateful way we're rendering
+        profiles.
+        """
+        # rendering profiles is a bit complex. Two constraints cause trouble:
+        # 1) users should be able to use environment/cli variables to specify
+        #    the target in their profile.
+        # 2) Missing environment/cli variables in profiles/targets that don't
+        #    end up getting selected should not cause errors.
+        # so first we'll just render the target name, then we use that rendered
+        # name to extract a profile that we can render.
+        if target_override is not None:
+            target_name = target_override
+        elif "target" in raw_profile:
+            # render the target if it was parsed from yaml
+            target_name = renderer.render_value(raw_profile["target"])
+        else:
+            target_name = "default"
+            fire_event(MissingProfileTarget(profile_name=profile_name, target_name=target_name))
+
+        raw_profile_data = cls._get_profile_data(raw_profile, profile_name, target_name)
+
+        try:
+            profile_data = renderer.render_data(raw_profile_data)
+        except CompilationException as exc:
+            raise DbtProfileError(str(exc)) from exc
+        return target_name, profile_data
+
+    @classmethod
+    def from_raw_profile_info(
+        cls,
+        raw_profile: Dict[str, Any],
+        profile_name: str,
+        renderer: ProfileRenderer,
+        user_config: Optional[Dict[str, Any]] = None,
+        target_override: Optional[str] = None,
+        threads_override: Optional[int] = None,
+    ) -> "Profile":
+        """Create a profile from its raw profile information.
+
+         (this is an intermediate step, mostly useful for unit testing)
+
+        :param raw_profile: The profile data for a single profile, from
+            disk as yaml and its values rendered with jinja.
+        :param profile_name: The profile name used.
+        :param renderer: The config renderer.
+        :param user_config: The global config for the user, if it
+            was present.
+        :param target_override: The target to use, if provided on
+            the command line.
+        :param threads_override: The thread count to use, if
+            provided on the command line.
+        :raises DbtProfileError: If the profile is invalid or missing, or the
+            target could not be found
+        :returns: The new Profile object.
+        """
+        # user_config is not rendered.
+        if user_config is None:
+            user_config = raw_profile.get("config")
+        # TODO: should it be, and the values coerced to bool?
+        target_name, profile_data = cls.render_profile(
+            raw_profile, profile_name, target_override, renderer
+        )
+
+        # valid connections never include the number of threads, but it's
+        # stored on a per-connection level in the raw configs
+        threads = profile_data.pop("threads", DEFAULT_THREADS)
+        if threads_override is not None:
+            threads = threads_override
+
+        credentials: Credentials = cls._credentials_from_profile(
+            profile_data, profile_name, target_name
+        )
+
+        return cls.from_credentials(
+            credentials=credentials,
+            profile_name=profile_name,
+            target_name=target_name,
+            threads=threads,
+            user_config=user_config,
+        )
+
+    @classmethod
+    def from_raw_profiles(
+        cls,
+        raw_profiles: Dict[str, Any],
+        profile_name: str,
+        renderer: ProfileRenderer,
+        target_override: Optional[str] = None,
+        threads_override: Optional[int] = None,
+    ) -> "Profile":
+        """
+        :param raw_profiles: The profile data, from disk as yaml.
+        :param profile_name: The profile name to use.
+        :param renderer: The config renderer.
+        :param target_override: The target to use, if provided on the command
+            line.
+        :param threads_override: The thread count to use, if provided on the
+            command line.
+        :raises DbtProjectError: If there is no profile name specified in the
+            project or the command line arguments
+        :raises DbtProfileError: If the profile is invalid or missing, or the
+            target could not be found
+        :returns: The new Profile object.
+        """
+        if profile_name not in raw_profiles:
+            raise DbtProjectError("Could not find profile named '{}'".format(profile_name))
+
+        # First, we've already got our final decision on profile name, and we
+        # don't render keys, so we can pluck that out
+        raw_profile = raw_profiles[profile_name]
+        if not raw_profile:
+            msg = f"Profile {profile_name} in profiles.yml is empty"
+            raise DbtProfileError(INVALID_PROFILE_MESSAGE.format(error_string=msg))
+        user_config = raw_profiles.get("config")
+
+        return cls.from_raw_profile_info(
+            raw_profile=raw_profile,
+            profile_name=profile_name,
+            renderer=renderer,
+            user_config=user_config,
+            target_override=target_override,
+            threads_override=threads_override,
+        )
+
+    @classmethod
+    def render_from_args(
+        cls,
+        args: Any,
+        renderer: ProfileRenderer,
+        project_profile_name: Optional[str],
+    ) -> "Profile":
+        """Given the raw profiles as read from disk and the name of the desired
+        profile if specified, return the profile component of the runtime
+        config.
+
+        :param args argparse.Namespace: The arguments as parsed from the cli.
+        :param project_profile_name Optional[str]: The profile name, if
+            specified in a project.
+        :raises DbtProjectError: If there is no profile name specified in the
+            project or the command line arguments, or if the specified profile
+            is not found
+        :raises DbtProfileError: If the profile is invalid or missing, or the
+            target could not be found.
+        :returns Profile: The new Profile object.
+        """
+        threads_override = getattr(args, "threads", None)
+        target_override = getattr(args, "target", None)
+        raw_profiles = read_profile(flags.PROFILES_DIR)
+        profile_name = cls.pick_profile_name(getattr(args, "profile", None), project_profile_name)
+        return cls.from_raw_profiles(
+            raw_profiles=raw_profiles,
+            profile_name=profile_name,
+            renderer=renderer,
+            target_override=target_override,
+            threads_override=threads_override,
+        )

core/dbt/config/project.py

@@ -0,0 +1,673 @@
+from copy import deepcopy
+from dataclasses import dataclass, field
+from itertools import chain
+from typing import (
+    List,
+    Dict,
+    Any,
+    Optional,
+    TypeVar,
+    Union,
+    Mapping,
+)
+from typing_extensions import Protocol, runtime_checkable
+
+import hashlib
+import os
+
+from dbt import deprecations
+from dbt.clients.system import resolve_path_from_base
+from dbt.clients.system import path_exists
+from dbt.clients.system import load_file_contents
+from dbt.clients.yaml_helper import load_yaml_text
+from dbt.contracts.connection import QueryComment
+from dbt.exceptions import DbtProjectError
+from dbt.exceptions import SemverException
+from dbt.exceptions import validator_error_message
+from dbt.exceptions import RuntimeException
+from dbt.graph import SelectionSpec
+from dbt.helper_types import NoValue
+from dbt.semver import VersionSpecifier
+from dbt.semver import versions_compatible
+from dbt.version import get_installed_version
+from dbt.utils import MultiDict
+from dbt.node_types import NodeType
+from dbt.config.selectors import SelectorDict
+from dbt.contracts.project import (
+    Project as ProjectContract,
+    SemverString,
+)
+from dbt.contracts.project import PackageConfig
+from dbt.dataclass_schema import ValidationError
+from .renderer import DbtProjectYamlRenderer
+from .selectors import (
+    selector_config_from_data,
+    selector_data_from_root,
+    SelectorConfig,
+)
+
+
+INVALID_VERSION_ERROR = """\
+This version of dbt is not supported with the '{package}' package.
+  Installed version of dbt: {installed}
+  Required version of dbt for '{package}': {version_spec}
+Check for a different version of the '{package}' package, or run dbt again with \
+--no-version-check
+"""
+
+
+IMPOSSIBLE_VERSION_ERROR = """\
+The package version requirement can never be satisfied for the '{package}
+package.
+  Required versions of dbt for '{package}': {version_spec}
+Check for a different version of the '{package}' package, or run dbt again with \
+--no-version-check
+"""
+
+MALFORMED_PACKAGE_ERROR = """\
+The packages.yml file in this project is malformed. Please double check
+the contents of this file and fix any errors before retrying.
+
+You can find more information on the syntax for this file here:
+https://docs.getdbt.com/docs/package-management
+
+Validator Error:
+{error}
+"""
+
+
+@runtime_checkable
+class IsFQNResource(Protocol):
+    fqn: List[str]
+    resource_type: NodeType
+    package_name: str
+
+
+def _load_yaml(path):
+    contents = load_file_contents(path)
+    return load_yaml_text(contents)
+
+
+def package_data_from_root(project_root):
+    package_filepath = resolve_path_from_base("packages.yml", project_root)
+
+    if path_exists(package_filepath):
+        packages_dict = _load_yaml(package_filepath)
+    else:
+        packages_dict = None
+    return packages_dict
+
+
+def package_config_from_data(packages_data: Dict[str, Any]):
+    if not packages_data:
+        packages_data = {"packages": []}
+
+    try:
+        PackageConfig.validate(packages_data)
+        packages = PackageConfig.from_dict(packages_data)
+    except ValidationError as e:
+        raise DbtProjectError(MALFORMED_PACKAGE_ERROR.format(error=str(e.message))) from e
+    return packages
+
+
+def _parse_versions(versions: Union[List[str], str]) -> List[VersionSpecifier]:
+    """Parse multiple versions as read from disk. The versions value may be any
+    one of:
+        - a single version string ('>0.12.1')
+        - a single string specifying multiple comma-separated versions
+            ('>0.11.1,<=0.12.2')
+        - an array of single-version strings (['>0.11.1', '<=0.12.2'])
+
+    Regardless, this will return a list of VersionSpecifiers
+    """
+    if isinstance(versions, str):
+        versions = versions.split(",")
+    return [VersionSpecifier.from_version_string(v) for v in versions]
+
+
+def _all_source_paths(
+    model_paths: List[str],
+    seed_paths: List[str],
+    snapshot_paths: List[str],
+    analysis_paths: List[str],
+    macro_paths: List[str],
+) -> List[str]:
+    # We need to turn a list of lists into just a list, then convert to a set to
+    # get only unique elements, then back to a list
+    return list(
+        set(list(chain(model_paths, seed_paths, snapshot_paths, analysis_paths, macro_paths)))
+    )
+
+
+T = TypeVar("T")
+
+
+def value_or(value: Optional[T], default: T) -> T:
+    if value is None:
+        return default
+    else:
+        return value
+
+
+def _raw_project_from(project_root: str) -> Dict[str, Any]:
+
+    project_root = os.path.normpath(project_root)
+    project_yaml_filepath = os.path.join(project_root, "dbt_project.yml")
+
+    # get the project.yml contents
+    if not path_exists(project_yaml_filepath):
+        raise DbtProjectError(
+            "no dbt_project.yml found at expected path {}".format(project_yaml_filepath)
+        )
+
+    project_dict = _load_yaml(project_yaml_filepath)
+
+    if not isinstance(project_dict, dict):
+        raise DbtProjectError("dbt_project.yml does not parse to a dictionary")
+
+    return project_dict
+
+
+def _query_comment_from_cfg(
+    cfg_query_comment: Union[QueryComment, NoValue, str, None]
+) -> QueryComment:
+    if not cfg_query_comment:
+        return QueryComment(comment="")
+
+    if isinstance(cfg_query_comment, str):
+        return QueryComment(comment=cfg_query_comment)
+
+    if isinstance(cfg_query_comment, NoValue):
+        return QueryComment()
+
+    return cfg_query_comment
+
+
+def validate_version(dbt_version: List[VersionSpecifier], project_name: str):
+    """Ensure this package works with the installed version of dbt."""
+    installed = get_installed_version()
+    if not versions_compatible(*dbt_version):
+        msg = IMPOSSIBLE_VERSION_ERROR.format(
+            package=project_name, version_spec=[x.to_version_string() for x in dbt_version]
+        )
+        raise DbtProjectError(msg)
+
+    if not versions_compatible(installed, *dbt_version):
+        msg = INVALID_VERSION_ERROR.format(
+            package=project_name,
+            installed=installed.to_version_string(),
+            version_spec=[x.to_version_string() for x in dbt_version],
+        )
+        raise DbtProjectError(msg)
+
+
+def _get_required_version(
+    project_dict: Dict[str, Any],
+    verify_version: bool,
+) -> List[VersionSpecifier]:
+    dbt_raw_version: Union[List[str], str] = ">=0.0.0"
+    required = project_dict.get("require-dbt-version")
+    if required is not None:
+        dbt_raw_version = required
+
+    try:
+        dbt_version = _parse_versions(dbt_raw_version)
+    except SemverException as e:
+        raise DbtProjectError(str(e)) from e
+
+    if verify_version:
+        # no name is also an error that we want to raise
+        if "name" not in project_dict:
+            raise DbtProjectError(
+                'Required "name" field not present in project',
+            )
+        validate_version(dbt_version, project_dict["name"])
+
+    return dbt_version
+
+
+@dataclass
+class RenderComponents:
+    project_dict: Dict[str, Any] = field(metadata=dict(description="The project dictionary"))
+    packages_dict: Dict[str, Any] = field(metadata=dict(description="The packages dictionary"))
+    selectors_dict: Dict[str, Any] = field(metadata=dict(description="The selectors dictionary"))
+
+
+@dataclass
+class PartialProject(RenderComponents):
+    profile_name: Optional[str] = field(
+        metadata=dict(description="The unrendered profile name in the project, if set")
+    )
+    project_name: Optional[str] = field(
+        metadata=dict(
+            description=(
+                "The name of the project. This should always be set and will not " "be rendered"
+            )
+        )
+    )
+    project_root: str = field(
+        metadata=dict(description="The root directory of the project"),
+    )
+    verify_version: bool = field(
+        metadata=dict(description=("If True, verify the dbt version matches the required version"))
+    )
+
+    def render_profile_name(self, renderer) -> Optional[str]:
+        if self.profile_name is None:
+            return None
+        return renderer.render_value(self.profile_name)
+
+    def get_rendered(
+        self,
+        renderer: DbtProjectYamlRenderer,
+    ) -> RenderComponents:
+
+        rendered_project = renderer.render_project(self.project_dict, self.project_root)
+        rendered_packages = renderer.render_packages(self.packages_dict)
+        rendered_selectors = renderer.render_selectors(self.selectors_dict)
+
+        return RenderComponents(
+            project_dict=rendered_project,
+            packages_dict=rendered_packages,
+            selectors_dict=rendered_selectors,
+        )
+
+    # Called by 'collect_parts' in RuntimeConfig
+    def render(self, renderer: DbtProjectYamlRenderer) -> "Project":
+        try:
+            rendered = self.get_rendered(renderer)
+            return self.create_project(rendered)
+        except DbtProjectError as exc:
+            if exc.path is None:
+                exc.path = os.path.join(self.project_root, "dbt_project.yml")
+            raise
+
+    def check_config_path(self, project_dict, deprecated_path, exp_path):
+        if deprecated_path in project_dict:
+            if exp_path in project_dict:
+                msg = (
+                    "{deprecated_path} and {exp_path} cannot both be defined. The "
+                    "`{deprecated_path}` config has been deprecated in favor of `{exp_path}`. "
+                    "Please update your `dbt_project.yml` configuration to reflect this "
+                    "change."
+                )
+                raise DbtProjectError(
+                    msg.format(deprecated_path=deprecated_path, exp_path=exp_path)
+                )
+            deprecations.warn(
+                f"project-config-{deprecated_path}",
+                deprecated_path=deprecated_path,
+                exp_path=exp_path,
+            )
+
+    def create_project(self, rendered: RenderComponents) -> "Project":
+        unrendered = RenderComponents(
+            project_dict=self.project_dict,
+            packages_dict=self.packages_dict,
+            selectors_dict=self.selectors_dict,
+        )
+        dbt_version = _get_required_version(
+            rendered.project_dict,
+            verify_version=self.verify_version,
+        )
+
+        self.check_config_path(rendered.project_dict, "source-paths", "model-paths")
+        self.check_config_path(rendered.project_dict, "data-paths", "seed-paths")
+
+        try:
+            ProjectContract.validate(rendered.project_dict)
+            cfg = ProjectContract.from_dict(rendered.project_dict)
+        except ValidationError as e:
+            raise DbtProjectError(validator_error_message(e)) from e
+        # name/version are required in the Project definition, so we can assume
+        # they are present
+        name = cfg.name
+        version = cfg.version
+        # this is added at project_dict parse time and should always be here
+        # once we see it.
+        if cfg.project_root is None:
+            raise DbtProjectError("cfg must have a project root!")
+        else:
+            project_root = cfg.project_root
+        # this is only optional in the sense that if it's not present, it needs
+        # to have been a cli argument.
+        profile_name = cfg.profile
+        # these are all the defaults
+
+        # `source_paths` is deprecated but still allowed. Copy it into
+        # `model_paths` to simlify logic throughout the rest of the system.
+        model_paths: List[str] = value_or(
+            cfg.model_paths if "model-paths" in rendered.project_dict else cfg.source_paths,
+            ["models"],
+        )
+        macro_paths: List[str] = value_or(cfg.macro_paths, ["macros"])
+        # `data_paths` is deprecated but still allowed. Copy it into
+        # `seed_paths` to simlify logic throughout the rest of the system.
+        seed_paths: List[str] = value_or(
+            cfg.seed_paths if "seed-paths" in rendered.project_dict else cfg.data_paths, ["seeds"]
+        )
+        test_paths: List[str] = value_or(cfg.test_paths, ["tests"])
+        analysis_paths: List[str] = value_or(cfg.analysis_paths, ["analyses"])
+        snapshot_paths: List[str] = value_or(cfg.snapshot_paths, ["snapshots"])
+
+        all_source_paths: List[str] = _all_source_paths(
+            model_paths, seed_paths, snapshot_paths, analysis_paths, macro_paths
+        )
+
+        docs_paths: List[str] = value_or(cfg.docs_paths, all_source_paths)
+        asset_paths: List[str] = value_or(cfg.asset_paths, [])
+        target_path: str = value_or(cfg.target_path, "target")
+        clean_targets: List[str] = value_or(cfg.clean_targets, [target_path])
+        log_path: str = value_or(cfg.log_path, "logs")
+        packages_install_path: str = value_or(cfg.packages_install_path, "dbt_packages")
+        # in the default case we'll populate this once we know the adapter type
+        # It would be nice to just pass along a Quoting here, but that would
+        # break many things
+        quoting: Dict[str, Any] = {}
+        if cfg.quoting is not None:
+            quoting = cfg.quoting.to_dict(omit_none=True)
+
+        dispatch: List[Dict[str, Any]]
+        models: Dict[str, Any]
+        seeds: Dict[str, Any]
+        snapshots: Dict[str, Any]
+        sources: Dict[str, Any]
+        tests: Dict[str, Any]
+        vars_value: VarProvider
+
+        dispatch = cfg.dispatch
+        models = cfg.models
+        seeds = cfg.seeds
+        snapshots = cfg.snapshots
+        sources = cfg.sources
+        tests = cfg.tests
+        if cfg.vars is None:
+            vars_dict: Dict[str, Any] = {}
+        else:
+            vars_dict = cfg.vars
+
+        vars_value = VarProvider(vars_dict)
+        # There will never be any project_env_vars when it's first created
+        project_env_vars: Dict[str, Any] = {}
+        on_run_start: List[str] = value_or(cfg.on_run_start, [])
+        on_run_end: List[str] = value_or(cfg.on_run_end, [])
+
+        query_comment = _query_comment_from_cfg(cfg.query_comment)
+
+        packages = package_config_from_data(rendered.packages_dict)
+        selectors = selector_config_from_data(rendered.selectors_dict)
+        manifest_selectors: Dict[str, Any] = {}
+        if rendered.selectors_dict and rendered.selectors_dict["selectors"]:
+            # this is a dict with a single key 'selectors' pointing to a list
+            # of dicts.
+            manifest_selectors = SelectorDict.parse_from_selectors_list(
+                rendered.selectors_dict["selectors"]
+            )
+        project = Project(
+            project_name=name,
+            version=version,
+            project_root=project_root,
+            profile_name=profile_name,
+            model_paths=model_paths,
+            macro_paths=macro_paths,
+            seed_paths=seed_paths,
+            test_paths=test_paths,
+            analysis_paths=analysis_paths,
+            docs_paths=docs_paths,
+            asset_paths=asset_paths,
+            target_path=target_path,
+            snapshot_paths=snapshot_paths,
+            clean_targets=clean_targets,
+            log_path=log_path,
+            packages_install_path=packages_install_path,
+            quoting=quoting,
+            models=models,
+            on_run_start=on_run_start,
+            on_run_end=on_run_end,
+            dispatch=dispatch,
+            seeds=seeds,
+            snapshots=snapshots,
+            dbt_version=dbt_version,
+            packages=packages,
+            manifest_selectors=manifest_selectors,
+            selectors=selectors,
+            query_comment=query_comment,
+            sources=sources,
+            tests=tests,
+            vars=vars_value,
+            config_version=cfg.config_version,
+            unrendered=unrendered,
+            project_env_vars=project_env_vars,
+        )
+        # sanity check - this means an internal issue
+        project.validate()
+        return project
+
+    @classmethod
+    def from_dicts(
+        cls,
+        project_root: str,
+        project_dict: Dict[str, Any],
+        packages_dict: Dict[str, Any],
+        selectors_dict: Dict[str, Any],
+        *,
+        verify_version: bool = False,
+    ):
+        """Construct a partial project from its constituent dicts."""
+        project_name = project_dict.get("name")
+        profile_name = project_dict.get("profile")
+
+        return cls(
+            profile_name=profile_name,
+            project_name=project_name,
+            project_root=project_root,
+            project_dict=project_dict,
+            packages_dict=packages_dict,
+            selectors_dict=selectors_dict,
+            verify_version=verify_version,
+        )
+
+    @classmethod
+    def from_project_root(
+        cls, project_root: str, *, verify_version: bool = False
+    ) -> "PartialProject":
+        project_root = os.path.normpath(project_root)
+        project_dict = _raw_project_from(project_root)
+        config_version = project_dict.get("config-version", 1)
+        if config_version != 2:
+            raise DbtProjectError(
+                f"Invalid config version: {config_version}, expected 2",
+                path=os.path.join(project_root, "dbt_project.yml"),
+            )
+
+        packages_dict = package_data_from_root(project_root)
+        selectors_dict = selector_data_from_root(project_root)
+        return cls.from_dicts(
+            project_root=project_root,
+            project_dict=project_dict,
+            selectors_dict=selectors_dict,
+            packages_dict=packages_dict,
+            verify_version=verify_version,
+        )
+
+
+class VarProvider:
+    """Var providers are tied to a particular Project."""
+
+    def __init__(self, vars: Dict[str, Dict[str, Any]]) -> None:
+        self.vars = vars
+
+    def vars_for(self, node: IsFQNResource, adapter_type: str) -> Mapping[str, Any]:
+        # in v2, vars are only either project or globally scoped
+        merged = MultiDict([self.vars])
+        merged.add(self.vars.get(node.package_name, {}))
+        return merged
+
+    def to_dict(self):
+        return self.vars
+
+
+# The Project class is included in RuntimeConfig, so any attribute
+# additions must also be set where the RuntimeConfig class is created
+@dataclass
+class Project:
+    project_name: str
+    version: Union[SemverString, float]
+    project_root: str
+    profile_name: Optional[str]
+    model_paths: List[str]
+    macro_paths: List[str]
+    seed_paths: List[str]
+    test_paths: List[str]
+    analysis_paths: List[str]
+    docs_paths: List[str]
+    asset_paths: List[str]
+    target_path: str
+    snapshot_paths: List[str]
+    clean_targets: List[str]
+    log_path: str
+    packages_install_path: str
+    quoting: Dict[str, Any]
+    models: Dict[str, Any]
+    on_run_start: List[str]
+    on_run_end: List[str]
+    dispatch: List[Dict[str, Any]]
+    seeds: Dict[str, Any]
+    snapshots: Dict[str, Any]
+    sources: Dict[str, Any]
+    tests: Dict[str, Any]
+    vars: VarProvider
+    dbt_version: List[VersionSpecifier]
+    packages: Dict[str, Any]
+    manifest_selectors: Dict[str, Any]
+    selectors: SelectorConfig
+    query_comment: QueryComment
+    config_version: int
+    unrendered: RenderComponents
+    project_env_vars: Dict[str, Any]
+
+    @property
+    def all_source_paths(self) -> List[str]:
+        return _all_source_paths(
+            self.model_paths,
+            self.seed_paths,
+            self.snapshot_paths,
+            self.analysis_paths,
+            self.macro_paths,
+        )
+
+    @property
+    def generic_test_paths(self):
+        generic_test_paths = []
+        for test_path in self.test_paths:
+            generic_test_paths.append(os.path.join(test_path, "generic"))
+        return generic_test_paths
+
+    def __str__(self):
+        cfg = self.to_project_config(with_packages=True)
+        return str(cfg)
+
+    def __eq__(self, other):
+        if not (isinstance(other, self.__class__) and isinstance(self, other.__class__)):
+            return False
+        return self.to_project_config(with_packages=True) == other.to_project_config(
+            with_packages=True
+        )
+
+    def to_project_config(self, with_packages=False):
+        """Return a dict representation of the config that could be written to
+        disk with `yaml.safe_dump` to get this configuration.
+
+        :param with_packages bool: If True, include the serialized packages
+            file in the root.
+        :returns dict: The serialized profile.
+        """
+        result = deepcopy(
+            {
+                "name": self.project_name,
+                "version": self.version,
+                "project-root": self.project_root,
+                "profile": self.profile_name,
+                "model-paths": self.model_paths,
+                "macro-paths": self.macro_paths,
+                "seed-paths": self.seed_paths,
+                "test-paths": self.test_paths,
+                "analysis-paths": self.analysis_paths,
+                "docs-paths": self.docs_paths,
+                "asset-paths": self.asset_paths,
+                "target-path": self.target_path,
+                "snapshot-paths": self.snapshot_paths,
+                "clean-targets": self.clean_targets,
+                "log-path": self.log_path,
+                "quoting": self.quoting,
+                "models": self.models,
+                "on-run-start": self.on_run_start,
+                "on-run-end": self.on_run_end,
+                "dispatch": self.dispatch,
+                "seeds": self.seeds,
+                "snapshots": self.snapshots,
+                "sources": self.sources,
+                "tests": self.tests,
+                "vars": self.vars.to_dict(),
+                "require-dbt-version": [v.to_version_string() for v in self.dbt_version],
+                "config-version": self.config_version,
+            }
+        )
+        if self.query_comment:
+            result["query-comment"] = self.query_comment.to_dict(omit_none=True)
+
+        if with_packages:
+            result.update(self.packages.to_dict(omit_none=True))
+
+        return result
+
+    def validate(self):
+        try:
+            ProjectContract.validate(self.to_project_config())
+        except ValidationError as e:
+            raise DbtProjectError(validator_error_message(e)) from e
+
+    @classmethod
+    def partial_load(cls, project_root: str, *, verify_version: bool = False) -> PartialProject:
+        return PartialProject.from_project_root(
+            project_root,
+            verify_version=verify_version,
+        )
+
+    @classmethod
+    def from_project_root(
+        cls,
+        project_root: str,
+        renderer: DbtProjectYamlRenderer,
+        *,
+        verify_version: bool = False,
+    ) -> "Project":
+        partial = cls.partial_load(project_root, verify_version=verify_version)
+        return partial.render(renderer)
+
+    def hashed_name(self):
+        return hashlib.md5(self.project_name.encode("utf-8")).hexdigest()
+
+    def get_selector(self, name: str) -> Union[SelectionSpec, bool]:
+        if name not in self.selectors:
+            raise RuntimeException(
+                f"Could not find selector named {name}, expected one of " f"{list(self.selectors)}"
+            )
+        return self.selectors[name]["definition"]
+
+    def get_default_selector_name(self) -> Union[str, None]:
+        """This function fetch the default selector to use on `dbt run` (if any)
+        :return: either a selector if default is set or None
+        :rtype: Union[SelectionSpec, None]
+        """
+        for selector_name, selector in self.selectors.items():
+            if selector["default"] is True:
+                return selector_name
+
+        return None
+
+    def get_macro_search_order(self, macro_namespace: str):
+        for dispatch_entry in self.dispatch:
+            if dispatch_entry["macro_namespace"] == macro_namespace:
+                return dispatch_entry["search_order"]
+        return None

core/dbt/config/renderer.py

@@ -0,0 +1,207 @@
+from typing import Dict, Any, Tuple, Optional, Union, Callable
+import re
+import os
+
+from dbt.clients.jinja import get_rendered, catch_jinja
+from dbt.context.target import TargetContext
+from dbt.context.secret import SecretContext, SECRET_PLACEHOLDER
+from dbt.context.base import BaseContext
+from dbt.contracts.connection import HasCredentials
+from dbt.exceptions import DbtProjectError, CompilationException, RecursionException
+from dbt.utils import deep_map_render
+from dbt.logger import SECRET_ENV_PREFIX
+
+
+Keypath = Tuple[Union[str, int], ...]
+
+
+class BaseRenderer:
+    def __init__(self, context: Dict[str, Any]) -> None:
+        self.context = context
+
+    @property
+    def name(self):
+        return "Rendering"
+
+    def should_render_keypath(self, keypath: Keypath) -> bool:
+        return True
+
+    def render_entry(self, value: Any, keypath: Keypath) -> Any:
+        if not self.should_render_keypath(keypath):
+            return value
+
+        return self.render_value(value, keypath)
+
+    def render_value(self, value: Any, keypath: Optional[Keypath] = None) -> Any:
+        # keypath is ignored.
+        # if it wasn't read as a string, ignore it
+        if not isinstance(value, str):
+            return value
+        try:
+            with catch_jinja():
+                return get_rendered(value, self.context, native=True)
+        except CompilationException as exc:
+            msg = f"Could not render {value}: {exc.msg}"
+            raise CompilationException(msg) from exc
+
+    def render_data(self, data: Dict[str, Any]) -> Dict[str, Any]:
+        try:
+            return deep_map_render(self.render_entry, data)
+        except RecursionException:
+            raise DbtProjectError(
+                f"Cycle detected: {self.name} input has a reference to itself", project=data
+            )
+
+
+def _list_if_none(value):
+    if value is None:
+        value = []
+    return value
+
+
+def _dict_if_none(value):
+    if value is None:
+        value = {}
+    return value
+
+
+def _list_if_none_or_string(value):
+    value = _list_if_none(value)
+    if isinstance(value, str):
+        return [value]
+    return value
+
+
+class ProjectPostprocessor(Dict[Keypath, Callable[[Any], Any]]):
+    def __init__(self):
+        super().__init__()
+
+        self[("on-run-start",)] = _list_if_none_or_string
+        self[("on-run-end",)] = _list_if_none_or_string
+
+        for k in ("models", "seeds", "snapshots"):
+            self[(k,)] = _dict_if_none
+            self[(k, "vars")] = _dict_if_none
+            self[(k, "pre-hook")] = _list_if_none_or_string
+            self[(k, "post-hook")] = _list_if_none_or_string
+        self[("seeds", "column_types")] = _dict_if_none
+
+    def postprocess(self, value: Any, key: Keypath) -> Any:
+        if key in self:
+            handler = self[key]
+            return handler(value)
+
+        return value
+
+
+class DbtProjectYamlRenderer(BaseRenderer):
+    _KEYPATH_HANDLERS = ProjectPostprocessor()
+
+    def __init__(
+        self, profile: Optional[HasCredentials] = None, cli_vars: Optional[Dict[str, Any]] = None
+    ) -> None:
+        # Generate contexts here because we want to save the context
+        # object in order to retrieve the env_vars. This is almost always
+        # a TargetContext, but in the debug task we want a project
+        # even when we don't have a profile.
+        if cli_vars is None:
+            cli_vars = {}
+        if profile:
+            self.ctx_obj = TargetContext(profile, cli_vars)
+        else:
+            self.ctx_obj = BaseContext(cli_vars)  # type:ignore
+        context = self.ctx_obj.to_dict()
+        super().__init__(context)
+
+    @property
+    def name(self):
+        "Project config"
+
+    # Uses SecretRenderer
+    def get_package_renderer(self) -> BaseRenderer:
+        return PackageRenderer(self.ctx_obj.cli_vars)
+
+    def render_project(
+        self,
+        project: Dict[str, Any],
+        project_root: str,
+    ) -> Dict[str, Any]:
+        """Render the project and insert the project root after rendering."""
+        rendered_project = self.render_data(project)
+        rendered_project["project-root"] = project_root
+        return rendered_project
+
+    def render_packages(self, packages: Dict[str, Any]):
+        """Render the given packages dict"""
+        package_renderer = self.get_package_renderer()
+        return package_renderer.render_data(packages)
+
+    def render_selectors(self, selectors: Dict[str, Any]):
+        return self.render_data(selectors)
+
+    def render_entry(self, value: Any, keypath: Keypath) -> Any:
+        result = super().render_entry(value, keypath)
+        return self._KEYPATH_HANDLERS.postprocess(result, keypath)
+
+    def should_render_keypath(self, keypath: Keypath) -> bool:
+        if not keypath:
+            return True
+
+        first = keypath[0]
+        # run hooks are not rendered
+        if first in {"on-run-start", "on-run-end", "query-comment"}:
+            return False
+
+        # don't render vars blocks until runtime
+        if first == "vars":
+            return False
+
+        if first in {"seeds", "models", "snapshots", "tests"}:
+            keypath_parts = {(k.lstrip("+ ") if isinstance(k, str) else k) for k in keypath}
+            # model-level hooks
+            if "pre-hook" in keypath_parts or "post-hook" in keypath_parts:
+                return False
+
+        return True
+
+
+class SecretRenderer(BaseRenderer):
+    def __init__(self, cli_vars: Dict[str, Any] = {}) -> None:
+        # Generate contexts here because we want to save the context
+        # object in order to retrieve the env_vars.
+        self.ctx_obj = SecretContext(cli_vars)
+        context = self.ctx_obj.to_dict()
+        super().__init__(context)
+
+    @property
+    def name(self):
+        return "Secret"
+
+    def render_value(self, value: Any, keypath: Optional[Keypath] = None) -> Any:
+        rendered = super().render_value(value, keypath)
+        if SECRET_ENV_PREFIX in str(rendered):
+            search_group = f"({SECRET_ENV_PREFIX}(.*))"
+            pattern = SECRET_PLACEHOLDER.format(search_group).replace("$", r"\$")
+            m = re.search(
+                pattern,
+                rendered,
+            )
+            if m:
+                found = m.group(1)
+                value = os.environ[found]
+                replace_this = SECRET_PLACEHOLDER.format(found)
+                return rendered.replace(replace_this, value)
+        else:
+            return rendered
+
+
+class ProfileRenderer(SecretRenderer):
+    @property
+    def name(self):
+        return "Profile"
+
+
+class PackageRenderer(SecretRenderer):
+    @property
+    def name(self):
+        return "Packages config"

core/dbt/config/runtime.py

@@ -0,0 +1,546 @@
+import itertools
+import os
+from copy import deepcopy
+from dataclasses import dataclass
+from pathlib import Path
+from typing import Dict, Any, Optional, Mapping, Iterator, Iterable, Tuple, List, MutableSet, Type
+
+from .profile import Profile
+from .project import Project
+from .renderer import DbtProjectYamlRenderer, ProfileRenderer
+from .utils import parse_cli_vars
+from dbt import flags
+from dbt.adapters.factory import get_relation_class_by_name, get_include_paths
+from dbt.helper_types import FQNPath, PathSet, DictDefaultEmptyStr
+from dbt.config.profile import read_user_config
+from dbt.contracts.connection import AdapterRequiredConfig, Credentials
+from dbt.contracts.graph.manifest import ManifestMetadata
+from dbt.contracts.relation import ComponentName
+from dbt.ui import warning_tag
+
+from dbt.contracts.project import Configuration, UserConfig
+from dbt.exceptions import (
+    RuntimeException,
+    DbtProjectError,
+    validator_error_message,
+    warn_or_error,
+    raise_compiler_error,
+)
+
+from dbt.dataclass_schema import ValidationError
+
+
+def _project_quoting_dict(proj: Project, profile: Profile) -> Dict[ComponentName, bool]:
+    src: Dict[str, Any] = profile.credentials.translate_aliases(proj.quoting)
+    result: Dict[ComponentName, bool] = {}
+    for key in ComponentName:
+        if key in src:
+            value = src[key]
+            if isinstance(value, bool):
+                result[key] = value
+    return result
+
+
+@dataclass
+class RuntimeConfig(Project, Profile, AdapterRequiredConfig):
+    args: Any
+    profile_name: str
+    cli_vars: Dict[str, Any]
+    dependencies: Optional[Mapping[str, "RuntimeConfig"]] = None
+
+    def __post_init__(self):
+        self.validate()
+
+    # Called by 'new_project' and 'from_args'
+    @classmethod
+    def from_parts(
+        cls,
+        project: Project,
+        profile: Profile,
+        args: Any,
+        dependencies: Optional[Mapping[str, "RuntimeConfig"]] = None,
+    ) -> "RuntimeConfig":
+        """Instantiate a RuntimeConfig from its components.
+
+        :param profile: A parsed dbt Profile.
+        :param project: A parsed dbt Project.
+        :param args: The parsed command-line arguments.
+        :returns RuntimeConfig: The new configuration.
+        """
+        quoting: Dict[str, Any] = (
+            get_relation_class_by_name(profile.credentials.type)
+            .get_default_quote_policy()
+            .replace_dict(_project_quoting_dict(project, profile))
+        ).to_dict(omit_none=True)
+
+        cli_vars: Dict[str, Any] = parse_cli_vars(getattr(args, "vars", "{}"))
+
+        return cls(
+            project_name=project.project_name,
+            version=project.version,
+            project_root=project.project_root,
+            model_paths=project.model_paths,
+            macro_paths=project.macro_paths,
+            seed_paths=project.seed_paths,
+            test_paths=project.test_paths,
+            analysis_paths=project.analysis_paths,
+            docs_paths=project.docs_paths,
+            asset_paths=project.asset_paths,
+            target_path=project.target_path,
+            snapshot_paths=project.snapshot_paths,
+            clean_targets=project.clean_targets,
+            log_path=project.log_path,
+            packages_install_path=project.packages_install_path,
+            quoting=quoting,
+            models=project.models,
+            on_run_start=project.on_run_start,
+            on_run_end=project.on_run_end,
+            dispatch=project.dispatch,
+            seeds=project.seeds,
+            snapshots=project.snapshots,
+            dbt_version=project.dbt_version,
+            packages=project.packages,
+            manifest_selectors=project.manifest_selectors,
+            selectors=project.selectors,
+            query_comment=project.query_comment,
+            sources=project.sources,
+            tests=project.tests,
+            vars=project.vars,
+            config_version=project.config_version,
+            unrendered=project.unrendered,
+            project_env_vars=project.project_env_vars,
+            profile_env_vars=profile.profile_env_vars,
+            profile_name=profile.profile_name,
+            target_name=profile.target_name,
+            user_config=profile.user_config,
+            threads=profile.threads,
+            credentials=profile.credentials,
+            args=args,
+            cli_vars=cli_vars,
+            dependencies=dependencies,
+        )
+
+    # Called by 'load_projects' in this class
+    def new_project(self, project_root: str) -> "RuntimeConfig":
+        """Given a new project root, read in its project dictionary, supply the
+        existing project's profile info, and create a new project file.
+
+        :param project_root: A filepath to a dbt project.
+        :raises DbtProfileError: If the profile is invalid.
+        :raises DbtProjectError: If project is missing or invalid.
+        :returns: The new configuration.
+        """
+        # copy profile
+        profile = Profile(**self.to_profile_info())
+        profile.validate()
+
+        # load the new project and its packages. Don't pass cli variables.
+        renderer = DbtProjectYamlRenderer(profile)
+
+        project = Project.from_project_root(
+            project_root,
+            renderer,
+            verify_version=bool(flags.VERSION_CHECK),
+        )
+
+        runtime_config = self.from_parts(
+            project=project,
+            profile=profile,
+            args=deepcopy(self.args),
+        )
+        # force our quoting back onto the new project.
+        runtime_config.quoting = deepcopy(self.quoting)
+        return runtime_config
+
+    def serialize(self) -> Dict[str, Any]:
+        """Serialize the full configuration to a single dictionary. For any
+        instance that has passed validate() (which happens in __init__), it
+        matches the Configuration contract.
+
+        Note that args are not serialized.
+
+        :returns dict: The serialized configuration.
+        """
+        result = self.to_project_config(with_packages=True)
+        result.update(self.to_profile_info(serialize_credentials=True))
+        result["cli_vars"] = deepcopy(self.cli_vars)
+        return result
+
+    def validate(self):
+        """Validate the configuration against its contract.
+
+        :raises DbtProjectError: If the configuration fails validation.
+        """
+        try:
+            Configuration.validate(self.serialize())
+        except ValidationError as e:
+            raise DbtProjectError(validator_error_message(e)) from e
+
+    @classmethod
+    def _get_rendered_profile(
+        cls,
+        args: Any,
+        profile_renderer: ProfileRenderer,
+        profile_name: Optional[str],
+    ) -> Profile:
+
+        return Profile.render_from_args(args, profile_renderer, profile_name)
+
+    @classmethod
+    def collect_parts(cls: Type["RuntimeConfig"], args: Any) -> Tuple[Project, Profile]:
+        # profile_name from the project
+        project_root = args.project_dir if args.project_dir else os.getcwd()
+        version_check = bool(flags.VERSION_CHECK)
+        partial = Project.partial_load(project_root, verify_version=version_check)
+
+        # build the profile using the base renderer and the one fact we know
+        # Note: only the named profile section is rendered. The rest of the
+        # profile is ignored.
+        cli_vars: Dict[str, Any] = parse_cli_vars(getattr(args, "vars", "{}"))
+        profile_renderer = ProfileRenderer(cli_vars)
+        profile_name = partial.render_profile_name(profile_renderer)
+        profile = cls._get_rendered_profile(args, profile_renderer, profile_name)
+        # Save env_vars encountered in rendering for partial parsing
+        profile.profile_env_vars = profile_renderer.ctx_obj.env_vars
+
+        # get a new renderer using our target information and render the
+        # project
+        project_renderer = DbtProjectYamlRenderer(profile, cli_vars)
+        project = partial.render(project_renderer)
+        # Save env_vars encountered in rendering for partial parsing
+        project.project_env_vars = project_renderer.ctx_obj.env_vars
+        return (project, profile)
+
+    # Called in main.py, lib.py, task/base.py
+    @classmethod
+    def from_args(cls, args: Any) -> "RuntimeConfig":
+        """Given arguments, read in dbt_project.yml from the current directory,
+        read in packages.yml if it exists, and use them to find the profile to
+        load.
+
+        :param args: The arguments as parsed from the cli.
+        :raises DbtProjectError: If the project is invalid or missing.
+        :raises DbtProfileError: If the profile is invalid or missing.
+        :raises ValidationException: If the cli variables are invalid.
+        """
+        project, profile = cls.collect_parts(args)
+
+        return cls.from_parts(
+            project=project,
+            profile=profile,
+            args=args,
+        )
+
+    def get_metadata(self) -> ManifestMetadata:
+        return ManifestMetadata(project_id=self.hashed_name(), adapter_type=self.credentials.type)
+
+    def _get_v2_config_paths(
+        self,
+        config,
+        path: FQNPath,
+        paths: MutableSet[FQNPath],
+    ) -> PathSet:
+        for key, value in config.items():
+            if isinstance(value, dict) and not key.startswith("+"):
+                self._get_config_paths(value, path + (key,), paths)
+            else:
+                paths.add(path)
+        return frozenset(paths)
+
+    def _get_config_paths(
+        self,
+        config: Dict[str, Any],
+        path: FQNPath = (),
+        paths: Optional[MutableSet[FQNPath]] = None,
+    ) -> PathSet:
+        if paths is None:
+            paths = set()
+
+        for key, value in config.items():
+            if isinstance(value, dict) and not key.startswith("+"):
+                self._get_v2_config_paths(value, path + (key,), paths)
+            else:
+                paths.add(path)
+        return frozenset(paths)
+
+    def get_resource_config_paths(self) -> Dict[str, PathSet]:
+        """Return a dictionary with resource type keys whose values are
+        lists of lists of strings, where each inner list of strings represents
+        a configured path in the resource.
+        """
+        return {
+            "models": self._get_config_paths(self.models),
+            "seeds": self._get_config_paths(self.seeds),
+            "snapshots": self._get_config_paths(self.snapshots),
+            "sources": self._get_config_paths(self.sources),
+            "tests": self._get_config_paths(self.tests),
+        }
+
+    def get_unused_resource_config_paths(
+        self,
+        resource_fqns: Mapping[str, PathSet],
+        disabled: PathSet,
+    ) -> List[FQNPath]:
+        """Return a list of lists of strings, where each inner list of strings
+        represents a type + FQN path of a resource configuration that is not
+        used.
+        """
+        disabled_fqns = frozenset(tuple(fqn) for fqn in disabled)
+        resource_config_paths = self.get_resource_config_paths()
+        unused_resource_config_paths = []
+        for resource_type, config_paths in resource_config_paths.items():
+            used_fqns = resource_fqns.get(resource_type, frozenset())
+            fqns = used_fqns | disabled_fqns
+
+            for config_path in config_paths:
+                if not _is_config_used(config_path, fqns):
+                    unused_resource_config_paths.append((resource_type,) + config_path)
+        return unused_resource_config_paths
+
+    def warn_for_unused_resource_config_paths(
+        self,
+        resource_fqns: Mapping[str, PathSet],
+        disabled: PathSet,
+    ) -> None:
+        unused = self.get_unused_resource_config_paths(resource_fqns, disabled)
+        if len(unused) == 0:
+            return
+
+        msg = UNUSED_RESOURCE_CONFIGURATION_PATH_MESSAGE.format(
+            len(unused), "\n".join("- {}".format(".".join(u)) for u in unused)
+        )
+
+        warn_or_error(msg, log_fmt=warning_tag("{}"))
+
+    def load_dependencies(self, base_only=False) -> Mapping[str, "RuntimeConfig"]:
+        if self.dependencies is None:
+            all_projects = {self.project_name: self}
+            internal_packages = get_include_paths(self.credentials.type)
+            if base_only:
+                # Test setup -- we want to load macros without dependencies
+                project_paths = itertools.chain(internal_packages)
+            else:
+                # raise exception if fewer installed packages than in packages.yml
+                count_packages_specified = len(self.packages.packages)  # type: ignore
+                count_packages_installed = len(tuple(self._get_project_directories()))
+                if count_packages_specified > count_packages_installed:
+                    raise_compiler_error(
+                        f"dbt found {count_packages_specified} package(s) "
+                        f"specified in packages.yml, but only "
+                        f"{count_packages_installed} package(s) installed "
+                        f'in {self.packages_install_path}. Run "dbt deps" to '
+                        f"install package dependencies."
+                    )
+                project_paths = itertools.chain(internal_packages, self._get_project_directories())
+            for project_name, project in self.load_projects(project_paths):
+                if project_name in all_projects:
+                    raise_compiler_error(
+                        f"dbt found more than one package with the name "
+                        f'"{project_name}" included in this project. Package '
+                        f"names must be unique in a project. Please rename "
+                        f"one of these packages."
+                    )
+                all_projects[project_name] = project
+            self.dependencies = all_projects
+        return self.dependencies
+
+    def clear_dependencies(self):
+        self.dependencies = None
+
+    # Called by 'load_dependencies' in this class
+    def load_projects(self, paths: Iterable[Path]) -> Iterator[Tuple[str, "RuntimeConfig"]]:
+        for path in paths:
+            try:
+                project = self.new_project(str(path))
+            except DbtProjectError as e:
+                raise DbtProjectError(
+                    f"Failed to read package: {e}",
+                    result_type="invalid_project",
+                    path=path,
+                ) from e
+            else:
+                yield project.project_name, project
+
+    def _get_project_directories(self) -> Iterator[Path]:
+        root = Path(self.project_root) / self.packages_install_path
+
+        if root.exists():
+            for path in root.iterdir():
+                if path.is_dir() and not path.name.startswith("__"):
+                    yield path
+
+
+class UnsetCredentials(Credentials):
+    def __init__(self):
+        super().__init__("", "")
+
+    @property
+    def type(self):
+        return None
+
+    @property
+    def unique_field(self):
+        return None
+
+    def connection_info(self, *args, **kwargs):
+        return {}
+
+    def _connection_keys(self):
+        return ()
+
+
+# This is used by UnsetProfileConfig, for commands which do
+# not require a profile, i.e. dbt deps and clean
+class UnsetProfile(Profile):
+    def __init__(self):
+        self.credentials = UnsetCredentials()
+        self.user_config = UserConfig()  # This will be read in _get_rendered_profile
+        self.profile_name = ""
+        self.target_name = ""
+        self.threads = -1
+
+    def to_target_dict(self):
+        return DictDefaultEmptyStr({})
+
+    def __getattribute__(self, name):
+        if name in {"profile_name", "target_name", "threads"}:
+            raise RuntimeException(f'Error: disallowed attribute "{name}" - no profile!')
+
+        return Profile.__getattribute__(self, name)
+
+
+# This class is used by the dbt deps and clean commands, because they don't
+# require a functioning profile.
+@dataclass
+class UnsetProfileConfig(RuntimeConfig):
+    """This class acts a lot _like_ a RuntimeConfig, except if your profile is
+    missing, any access to profile members results in an exception.
+    """
+
+    def __post_init__(self):
+        # instead of futzing with InitVar overrides or rewriting __init__, just
+        # `del` the attrs we don't want  users touching.
+        del self.profile_name
+        del self.target_name
+        # don't call super().__post_init__(), as that calls validate(), and
+        # this object isn't very valid
+
+    def __getattribute__(self, name):
+        # Override __getattribute__ to check that the attribute isn't 'banned'.
+        if name in {"profile_name", "target_name"}:
+            raise RuntimeException(f'Error: disallowed attribute "{name}" - no profile!')
+
+        # avoid every attribute access triggering infinite recursion
+        return RuntimeConfig.__getattribute__(self, name)
+
+    def to_target_dict(self):
+        # re-override the poisoned profile behavior
+        return DictDefaultEmptyStr({})
+
+    @classmethod
+    def from_parts(
+        cls,
+        project: Project,
+        profile: Profile,
+        args: Any,
+        dependencies: Optional[Mapping[str, "RuntimeConfig"]] = None,
+    ) -> "RuntimeConfig":
+        """Instantiate a RuntimeConfig from its components.
+
+        :param profile: Ignored.
+        :param project: A parsed dbt Project.
+        :param args: The parsed command-line arguments.
+        :returns RuntimeConfig: The new configuration.
+        """
+        cli_vars: Dict[str, Any] = parse_cli_vars(getattr(args, "vars", "{}"))
+
+        return cls(
+            project_name=project.project_name,
+            version=project.version,
+            project_root=project.project_root,
+            model_paths=project.model_paths,
+            macro_paths=project.macro_paths,
+            seed_paths=project.seed_paths,
+            test_paths=project.test_paths,
+            analysis_paths=project.analysis_paths,
+            docs_paths=project.docs_paths,
+            asset_paths=project.asset_paths,
+            target_path=project.target_path,
+            snapshot_paths=project.snapshot_paths,
+            clean_targets=project.clean_targets,
+            log_path=project.log_path,
+            packages_install_path=project.packages_install_path,
+            quoting=project.quoting,  # we never use this anyway.
+            models=project.models,
+            on_run_start=project.on_run_start,
+            on_run_end=project.on_run_end,
+            dispatch=project.dispatch,
+            seeds=project.seeds,
+            snapshots=project.snapshots,
+            dbt_version=project.dbt_version,
+            packages=project.packages,
+            manifest_selectors=project.manifest_selectors,
+            selectors=project.selectors,
+            query_comment=project.query_comment,
+            sources=project.sources,
+            tests=project.tests,
+            vars=project.vars,
+            config_version=project.config_version,
+            unrendered=project.unrendered,
+            project_env_vars=project.project_env_vars,
+            profile_env_vars=profile.profile_env_vars,
+            profile_name="",
+            target_name="",
+            user_config=UserConfig(),
+            threads=getattr(args, "threads", 1),
+            credentials=UnsetCredentials(),
+            args=args,
+            cli_vars=cli_vars,
+            dependencies=dependencies,
+        )
+
+    @classmethod
+    def _get_rendered_profile(
+        cls,
+        args: Any,
+        profile_renderer: ProfileRenderer,
+        profile_name: Optional[str],
+    ) -> Profile:
+
+        profile = UnsetProfile()
+        # The profile (for warehouse connection) is not needed, but we want
+        # to get the UserConfig, which is also in profiles.yml
+        user_config = read_user_config(flags.PROFILES_DIR)
+        profile.user_config = user_config
+        return profile
+
+    @classmethod
+    def from_args(cls: Type[RuntimeConfig], args: Any) -> "RuntimeConfig":
+        """Given arguments, read in dbt_project.yml from the current directory,
+        read in packages.yml if it exists, and use them to find the profile to
+        load.
+
+        :param args: The arguments as parsed from the cli.
+        :raises DbtProjectError: If the project is invalid or missing.
+        :raises DbtProfileError: If the profile is invalid or missing.
+        :raises ValidationException: If the cli variables are invalid.
+        """
+        project, profile = cls.collect_parts(args)
+
+        return cls.from_parts(project=project, profile=profile, args=args)
+
+
+UNUSED_RESOURCE_CONFIGURATION_PATH_MESSAGE = """\
+Configuration paths exist in your dbt_project.yml file which do not \
+apply to any resources.
+There are {} unused configuration paths:
+{}
+"""
+
+
+def _is_config_used(path, fqns):
+    if fqns:
+        for fqn in fqns:
+            if len(path) <= len(fqn) and fqn[: len(path)] == path:
+                return True
+    return False

core/dbt/config/selectors.py

@@ -0,0 +1,195 @@
+from pathlib import Path
+from typing import Dict, Any, Union
+from dbt.clients.yaml_helper import yaml, Loader, Dumper, load_yaml_text  # noqa: F401
+from dbt.dataclass_schema import ValidationError
+
+from .renderer import BaseRenderer
+
+from dbt.clients.system import (
+    load_file_contents,
+    path_exists,
+    resolve_path_from_base,
+)
+from dbt.contracts.selection import SelectorFile
+from dbt.exceptions import DbtSelectorsError, RuntimeException
+from dbt.graph import parse_from_selectors_definition, SelectionSpec
+from dbt.graph.selector_spec import SelectionCriteria
+
+MALFORMED_SELECTOR_ERROR = """\
+The selectors.yml file in this project is malformed. Please double check
+the contents of this file and fix any errors before retrying.
+
+You can find more information on the syntax for this file here:
+https://docs.getdbt.com/docs/package-management
+
+Validator Error:
+{error}
+"""
+
+
+class SelectorConfig(Dict[str, Dict[str, Union[SelectionSpec, bool]]]):
+    @classmethod
+    def selectors_from_dict(cls, data: Dict[str, Any]) -> "SelectorConfig":
+        try:
+            SelectorFile.validate(data)
+            selector_file = SelectorFile.from_dict(data)
+            validate_selector_default(selector_file)
+            selectors = parse_from_selectors_definition(selector_file)
+        except ValidationError as exc:
+            yaml_sel_cfg = yaml.dump(exc.instance)
+            raise DbtSelectorsError(
+                f"Could not parse selector file data: \n{yaml_sel_cfg}\n"
+                f"Valid root-level selector definitions: "
+                f"union, intersection, string, dictionary. No lists. "
+                f"\nhttps://docs.getdbt.com/reference/node-selection/"
+                f"yaml-selectors",
+                result_type="invalid_selector",
+            ) from exc
+        except RuntimeException as exc:
+            raise DbtSelectorsError(
+                f"Could not read selector file data: {exc}",
+                result_type="invalid_selector",
+            ) from exc
+
+        return cls(selectors)
+
+    @classmethod
+    def render_from_dict(
+        cls,
+        data: Dict[str, Any],
+        renderer: BaseRenderer,
+    ) -> "SelectorConfig":
+        try:
+            rendered = renderer.render_data(data)
+        except (ValidationError, RuntimeException) as exc:
+            raise DbtSelectorsError(
+                f"Could not render selector data: {exc}",
+                result_type="invalid_selector",
+            ) from exc
+        return cls.selectors_from_dict(rendered)
+
+    @classmethod
+    def from_path(
+        cls,
+        path: Path,
+        renderer: BaseRenderer,
+    ) -> "SelectorConfig":
+        try:
+            data = load_yaml_text(load_file_contents(str(path)))
+        except (ValidationError, RuntimeException) as exc:
+            raise DbtSelectorsError(
+                f"Could not read selector file: {exc}",
+                result_type="invalid_selector",
+                path=path,
+            ) from exc
+
+        try:
+            return cls.render_from_dict(data, renderer)
+        except DbtSelectorsError as exc:
+            exc.path = path
+            raise
+
+
+def selector_data_from_root(project_root: str) -> Dict[str, Any]:
+    selector_filepath = resolve_path_from_base("selectors.yml", project_root)
+
+    if path_exists(selector_filepath):
+        selectors_dict = load_yaml_text(load_file_contents(selector_filepath))
+    else:
+        selectors_dict = None
+    return selectors_dict
+
+
+def selector_config_from_data(selectors_data: Dict[str, Any]) -> SelectorConfig:
+    if not selectors_data:
+        selectors_data = {"selectors": []}
+
+    try:
+        selectors = SelectorConfig.selectors_from_dict(selectors_data)
+    except ValidationError as e:
+        raise DbtSelectorsError(
+            MALFORMED_SELECTOR_ERROR.format(error=str(e.message)),
+            result_type="invalid_selector",
+        ) from e
+    return selectors
+
+
+def validate_selector_default(selector_file: SelectorFile) -> None:
+    """Check if a selector.yml file has more than 1 default key set to true"""
+    default_set: bool = False
+    default_selector_name: Union[str, None] = None
+
+    for selector in selector_file.selectors:
+        if selector.default is True and default_set is False:
+            default_set = True
+            default_selector_name = selector.name
+            continue
+        if selector.default is True and default_set is True:
+            raise DbtSelectorsError(
+                "Error when parsing the selector file. "
+                "Found multiple selectors with `default: true`:"
+                f"{default_selector_name} and {selector.name}"
+            )
+
+
+# These are utilities to clean up the dictionary created from
+# selectors.yml by turning the cli-string format entries into
+# normalized dictionary entries. It parallels the flow in
+# dbt/graph/cli.py. If changes are made there, it might
+# be necessary to make changes here. Ideally it would be
+# good to combine the two flows into one at some point.
+class SelectorDict:
+    @classmethod
+    def parse_dict_definition(cls, definition):
+        key = list(definition)[0]
+        value = definition[key]
+        if isinstance(value, list):
+            new_values = []
+            for sel_def in value:
+                new_value = cls.parse_from_definition(sel_def)
+                new_values.append(new_value)
+            value = new_values
+        if key == "exclude":
+            definition = {key: value}
+        elif len(definition) == 1:
+            definition = {"method": key, "value": value}
+        return definition
+
+    @classmethod
+    def parse_a_definition(cls, def_type, definition):
+        # this definition must be a list
+        new_dict = {def_type: []}
+        for sel_def in definition[def_type]:
+            if isinstance(sel_def, dict):
+                sel_def = cls.parse_from_definition(sel_def)
+                new_dict[def_type].append(sel_def)
+            elif isinstance(sel_def, str):
+                sel_def = SelectionCriteria.dict_from_single_spec(sel_def)
+                new_dict[def_type].append(sel_def)
+            else:
+                new_dict[def_type].append(sel_def)
+        return new_dict
+
+    @classmethod
+    def parse_from_definition(cls, definition):
+        if isinstance(definition, str):
+            definition = SelectionCriteria.dict_from_single_spec(definition)
+        elif "union" in definition:
+            definition = cls.parse_a_definition("union", definition)
+        elif "intersection" in definition:
+            definition = cls.parse_a_definition("intersection", definition)
+        elif isinstance(definition, dict):
+            definition = cls.parse_dict_definition(definition)
+        return definition
+
+    # This is the normal entrypoint of this code. Give it the
+    # list of selectors generated from the selectors.yml file.
+    @classmethod
+    def parse_from_selectors_list(cls, selectors):
+        selector_dict = {}
+        for selector in selectors:
+            sel_name = selector["name"]
+            selector_dict[sel_name] = selector
+            definition = cls.parse_from_definition(selector["definition"])
+            selector_dict[sel_name]["definition"] = definition
+        return selector_dict

core/dbt/config/utils.py

@@ -0,0 +1,75 @@
+from argparse import Namespace
+from typing import Any, Dict, Optional, Union
+from xmlrpc.client import Boolean
+from dbt.contracts.project import UserConfig
+
+import dbt.flags as flags
+from dbt.clients import yaml_helper
+from dbt.config import Profile, Project, read_user_config
+from dbt.config.renderer import DbtProjectYamlRenderer, ProfileRenderer
+from dbt.events.functions import fire_event
+from dbt.events.types import InvalidVarsYAML
+from dbt.exceptions import ValidationException, raise_compiler_error
+
+
+def parse_cli_vars(var_string: str) -> Dict[str, Any]:
+    try:
+        cli_vars = yaml_helper.load_yaml_text(var_string)
+        var_type = type(cli_vars)
+        if var_type is dict:
+            return cli_vars
+        else:
+            type_name = var_type.__name__
+            raise_compiler_error(
+                "The --vars argument must be a YAML dictionary, but was "
+                "of type '{}'".format(type_name)
+            )
+    except ValidationException:
+        fire_event(InvalidVarsYAML())
+        raise
+
+
+def get_project_config(
+    project_path: str,
+    profile_name: str,
+    args: Namespace = Namespace(),
+    cli_vars: Optional[Dict[str, Any]] = None,
+    profile: Optional[Profile] = None,
+    user_config: Optional[UserConfig] = None,
+    return_dict: Boolean = True,
+) -> Union[Project, Dict]:
+    """Returns a project config (dict or object) from a given project path and profile name.
+
+    Args:
+        project_path: Path to project
+        profile_name: Name of profile
+        args: An argparse.Namespace that represents what would have been passed in on the
+            command line (optional)
+        cli_vars: A dict of any vars that would have been passed in on the command line (optional)
+            (see parse_cli_vars above for formatting details)
+        profile: A dbt.config.profile.Profile object (optional)
+        user_config: A dbt.contracts.project.UserConfig object (optional)
+        return_dict: Return a dict if true, return the full dbt.config.project.Project object if false
+
+    Returns:
+        A full project config
+
+    """
+    # Generate a profile if not provided
+    if profile is None:
+        # Generate user_config if not provided
+        if user_config is None:
+            user_config = read_user_config(flags.PROFILES_DIR)
+        # Update flags
+        flags.set_from_args(args, user_config)
+        if cli_vars is None:
+            cli_vars = {}
+        profile = Profile.render_from_args(args, ProfileRenderer(cli_vars), profile_name)
+    # Generate a project
+    project = Project.from_project_root(
+        project_path,
+        DbtProjectYamlRenderer(profile),
+        verify_version=bool(flags.VERSION_CHECK),
+    )
+    # Return
+    return project.to_project_config() if return_dict else project