refactor/docs: improve compile_pip_requirements error message and docs (#2792)

Resolution failure is the most common error from pip-compile, so we
should make sure the error message is as clean as it can be. Previously,
the output was cluttered with the exception traceback, which makes the
actual error hard to see (several nested traceback).

The new output shortens it with a nicer message:

```
Checking _main/requirements_lock.txt
  ERROR: Cannot install requests<2.24 and requests~=2.25.1 because these package versions have conflicting dependencies.
ResolutionImpossible: for help visit https://pip.pypa.io/en/latest/topics/dependency-resolution/#dealing-with-dependency-conflicts
```

Fixes #2763

---------

Co-authored-by: Richard Levasseur <rlevasseur@google.com>
3 files changed
tree: 2fca95c58ffcbbcc7e0656cab52d55a5d315fe55
  1. .bazelci/
  2. .bcr/
  3. .ci/
  4. .github/
  5. docs/
  6. examples/
  7. gazelle/
  8. private/
  9. python/
  10. sphinxdocs/
  11. tests/
  12. third_party/
  13. tools/
  14. .bazelignore
  15. .bazelrc
  16. .bazelversion
  17. .git-blame-ignore-revs
  18. .gitattributes
  19. .gitignore
  20. .pre-commit-config.yaml
  21. .readthedocs.yml
  22. addlicense.sh
  23. AUTHORS
  24. BUILD.bazel
  25. BZLMOD_SUPPORT.md
  26. CHANGELOG.md
  27. CONTRIBUTING.md
  28. CONTRIBUTORS
  29. DEVELOPING.md
  30. internal_dev_deps.bzl
  31. internal_dev_setup.bzl
  32. LICENSE
  33. MODULE.bazel
  34. README.md
  35. RELEASING.md
  36. version.bzl
  37. WORKSPACE
  38. 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.