docs: describe `annotations` attr of `pip_parse` (#1667)

My default expectation would be that the keys to the `annotations`
dictionary passed to `pip_parse` would use the `normalize_name(...)`
convention, as is used elsewhere in the API. However, this does not
appear to be the case. I originally was going to file a bug, but maybe
just documenting the current behavior is enough?

For a minimal repro showing that this capitalization is indeed required,
see https://github.com/bruno-digitbio/bug-rules-python-annotation-pyqt

In that repo, 
```bash
$ bazel run //:test_has_comment
$ tail $(bazel info output_base)/external/pip_pyqt6/BUILD.bazel
$ tail $(bazel info output_base)/external/pip_wheel/BUILD.bazel
```
will both show `# A comment` at the bottom, as requested in the
`WORKSPACE` file. However, if you first run

```bash
$ bazel run //:requirements.update
```

then the auto-generated requirements file will use lowercase for the
requirement specification, breaking the desired behavior.

Please let me know if it makes more sense to just check in the docs,
include this example (or something similar) as a small test, or
something else. Apologies if I missed anything in the contribution
guidelines!
1 file changed
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  1. .bazelci/
  2. .bcr/
  3. .ci/
  4. .github/
  5. docs/
  6. examples/
  7. gazelle/
  8. python/
  9. sphinxdocs/
  10. tests/
  11. third_party/
  12. tools/
  13. .bazelignore
  14. .bazelrc
  15. .bazelversion
  16. .git-blame-ignore-revs
  17. .gitattributes
  18. .gitignore
  19. .pre-commit-config.yaml
  20. .readthedocs.yml
  21. addlicense.sh
  22. AUTHORS
  23. BUILD.bazel
  24. BZLMOD_SUPPORT.md
  25. CHANGELOG.md
  26. CONTRIBUTING.md
  27. CONTRIBUTORS
  28. DEVELOPING.md
  29. internal_deps.bzl
  30. internal_setup.bzl
  31. LICENSE
  32. MODULE.bazel
  33. README.md
  34. version.bzl
  35. WORKSPACE
  36. WORKSPACE.bzlmod
README.md

Python Rules for Bazel

Build status

Overview

This repository is the home of the core Python rules -- py_library, py_binary, py_test, py_proto_library, and related symbols that provide the basis for Python support in Bazel. It also contains package installation rules for integrating with PyPI and other indices.

Documentation for rules_python is at https://rules-python.readthedocs.io and in the Bazel Build Encyclopedia.

Examples live in the examples directory.

The core rules are stable. Their implementation is subject to Bazel's backward compatibility policy. This repository aims to follow semantic versioning.

The Bazel community maintains this repository. Neither Google nor the Bazel team provides support for the code. However, this repository is part of the test suite used to vet new Bazel releases. See How to contribute page for information on our development workflow.

Documentation

For detailed documentation, see https://rules-python.readthedocs.io

Bzlmod support

  • Status: Beta
  • Full Feature Parity: No

See Bzlmod support for more details.