tree 53424d2047c049b8c0530329368dc72d3b4decd7
parent 6ffb04e299d483222ebb5bb940d13c25b51cdb5e
author Ignas Anikevicius <240938+aignas@users.noreply.github.com> 1702488862 +0900
committer GitHub <noreply@github.com> 1702488862 +0000
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feat(whl_library): generate platform-specific dependency closures (#1593)

Before this change, the dependency closures would be influenced by the
host-python interpreter, this removes the influence by detecting the
platforms against which the `Requires-Dist` wheel metadata is evaluated.
This functionality can be enabled via `experimental_target_platforms`
attribute to the `pip.parse` extension and is showcased in the `bzlmod`
example. The same attribute is also supported on the legacy `pip_parse`
repository rule.

The detection works in the following way:
- Check if the python wheel is platform specific or cross-platform
  (i.e., ends with `any.whl`), if it is then platform-specific
  dependencies are generated, which will go through a `select`
  statement.
- If it is platform specific, then parse the platform_tag and evaluate
  the `Requires-Dist` markers assuming the target platform rather than
  the host platform.

NOTE: The `whl` `METADATA` is now being parsed using the `packaging`
Python package instead of `pkg_resources` from `setuptools`.

Fixes #1591

---------

Co-authored-by: Richard Levasseur <richardlev@gmail.com>