Prep for 2.7.0rc0

src/python/pants/VERSION

@@ -1 +1 @@
-2.7.0.dev4
+2.7.0rc0

src/python/pants/notes/2.7.x.md

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 # 2.7.x Stable Releases
 
+## 2.7.0rc0 (Aug 31, 2021)
+
+### New Features
+
+* Add `[tool].lockfile` (e.g. `[black].lockfile`) for Python tools and activate `./pants generate-lockfiles` by default ([#12684](https://github.com/pantsbuild/pants/pull/12684))
+
+* Add `--generate-lockfiles-resolve` to allow generating for only certain tools ([#12676](https://github.com/pantsbuild/pants/pull/12676))
+
+* Add `[generate-lockfiles].custom_command` ([#12687](https://github.com/pantsbuild/pants/pull/12687))
+
+* Add experimental Docker build rules. ([#12467](https://github.com/pantsbuild/pants/pull/12467))
+
+### User API Changes
+
+* Use Pants's default tool lockfiles by default for Python tools like Black, Pytest, and Flake8 ([#12689](https://github.com/pantsbuild/pants/pull/12689))
+
+* Set `[python-setup].invalid_lockfile_behavior` to `error` by default ([#12686](https://github.com/pantsbuild/pants/pull/12686))
+
+* Bump default for `pytest-cov` (`[pytest].extra_requirements`) and `[coverage-py].version` so both use `coverage 5.5` ([#12690](https://github.com/pantsbuild/pants/pull/12690))
+
+* Pin `GitPython==3.1.18` by default with Bandit to ensure yanked release isn't used in lockfile generation ([#12691](https://github.com/pantsbuild/pants/pull/12691))
+
+* Stop pinning `stevedore<3` by default for Bandit ([#12681](https://github.com/pantsbuild/pants/pull/12681))
+
+* Stop installing `setuptools` by default with Black, Flake8, Isort, and Yapf ([#12673](https://github.com/pantsbuild/pants/pull/12673))
+
+* Stop using `[python-setup].requirements_constraints` when installing tools like Black and MyPy ([#12639](https://github.com/pantsbuild/pants/pull/12639))
+
+* Default to `my-dep-stubs` and `stubs-my-dep` being third-party type stubs ([#12598](https://github.com/pantsbuild/pants/pull/12598))
+
+* Type stubs should be registered as normal requirements, not in `[mypy].extra_requirements` ([#12597](https://github.com/pantsbuild/pants/pull/12597))
+
+### Plugin API Changes
+
+* Support indivisible Sources fields ([#12685](https://github.com/pantsbuild/pants/pull/12685))
+
+* Render EngineAware parameters in cycle errors from Graph. ([#12668](https://github.com/pantsbuild/pants/pull/12668))
+
+* Split PexRequirements into three unioned types ([#12644](https://github.com/pantsbuild/pants/pull/12644))
+
+* Add `__repr__` impl for PySnapshot ([#12622](https://github.com/pantsbuild/pants/pull/12622))
+
+* Remove the `rationale` field from BashBinaryRequest. ([#12624](https://github.com/pantsbuild/pants/pull/12624))
+
+### Bug fixes
+
+* The `pex_binary` "venv" mode now sees bin scripts. ([#12664](https://github.com/pantsbuild/pants/pull/12664))
+
+* Fix UI rendering when multiple tasks have the same label. ([#12659](https://github.com/pantsbuild/pants/pull/12659))
+
+* tailor: do not append comma to kwarg with empty tuple ([#12653](https://github.com/pantsbuild/pants/pull/12653))
+
+* Fix `FindBinary` when `which` is discoverable on `$PATH` on macOS ([#12581](https://github.com/pantsbuild/pants/pull/12581))
+
+* Fix coloring of stderr logs with pantsd ([#12585](https://github.com/pantsbuild/pants/pull/12585))
+
+### Performance
+
+* Decompose requirements pexes ([#12675](https://github.com/pantsbuild/pants/pull/12675))
+
+### Documentation
+
+* Switch log warning rendering to yellow. ([#12596](https://github.com/pantsbuild/pants/pull/12596))
+
+* Align `Enriched*Result` colors, sigils, and log levels. ([#12645](https://github.com/pantsbuild/pants/pull/12645))
+
+* Fix Toolchain plugin being included in generated reference docs ([#12642](https://github.com/pantsbuild/pants/pull/12642))
+
 ## 2.7.0.dev4 (Aug 15, 2021)
 
 ### New Features