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@rickeylev rickeylev commented Oct 2, 2025

This adds tests that verify toolchains are registered and resolving correctly for
the different variants and platforms for the runtimes.

This also shows that workspace mode isn't registering musl or freethreaded builds
correctly, so use them isn't as easy as simply setting the build flags. For now,
the tests skip those in workspace mode.

Along the way, fix a bug where py_runtime would crash if it got the python version
from the flag, and the version contained more than micro (e.g. "3.14.0rc0")

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Summary of Changes

Hello @rickeylev, I'm Gemini Code Assist1! I'm currently reviewing this pull request and will post my feedback shortly. In the meantime, here's a summary to help you and other reviewers quickly get up to speed!

This pull request significantly enhances the testing infrastructure by adding new tests focused on the correct registration and resolution of Python toolchains under diverse build configurations. It also includes a refactoring of how platform targets are defined and referenced within the test suite, consolidating them into a dedicated platforms directory for better organization and maintainability. A minor improvement to Python version parsing logic was also included.

Highlights

  • New Toolchain Resolution Tests: Introduced a comprehensive suite of tests to verify that Python toolchains are correctly registered and resolved across various platforms, architectures, libc variants (glibc, musl), and freethreaded build configurations. These tests cover the two most recent Python versions.
  • Platform Definition Refactoring: Centralized platform definitions for testing by moving platform rule declarations from tests/support/BUILD.bazel to a new tests/support/platforms/BUILD.bazel file. Correspondingly, a new tests/support/platforms/platforms.bzl file was added to provide structured Label constants for these platforms, simplifying their usage in test configurations.
  • Improved Python Version Parsing: The internal _interpreter_version_info_from_version_str function in py_runtime_rule.bzl was updated to leverage a more robust version.parse utility, ensuring accurate extraction of major, minor, and micro version components from Python version strings.
  • Identified Workspace Mode Limitation: The new tests revealed that workspace mode currently does not correctly register musl or freethreaded Python builds, leading to these specific test cases being conditionally skipped when BZLMOD is not enabled.
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Code Review

This pull request introduces a comprehensive test suite to verify Python toolchain registration and resolution across different platforms and configurations. It also refactors platform definitions for better maintainability. The changes are generally good, but I've identified a couple of areas for improvement: one for code simplification and another to fix a potential issue in the new tests.

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@aignas aignas left a comment

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LGTM, thank you for the additional cleanups!

@rickeylev rickeylev added this pull request to the merge queue Oct 2, 2025
Merged via the queue into bazel-contrib:main with commit 394dda2 Oct 2, 2025
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@rickeylev rickeylev deleted the add.toolchain.config.tests branch October 2, 2025 04:30
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2 participants