feat: allow "repairing" pure python wheel

[mayeut]

The default behaviour still returns an error but this can now be overridden.

close #438

[Copilot]

Pull request overview

This PR adds a new --allow-pure-python-wheel flag that allows auditwheel to process pure Python wheels (wheels with no platform-specific binaries) without returning an error. By default, auditwheel still returns an error for pure Python wheels to maintain backward compatibility, but users can now opt-in to allow them.

Key changes:

• Added --allow-pure-python-wheel command-line flag to both show and repair commands
• For repair mode with the flag enabled, pure Python wheels are copied to the output directory unchanged
• Added comprehensive test coverage for the new functionality including edge cases

Reviewed changes

Copilot reviewed 3 out of 3 changed files in this pull request and generated 6 comments.

File	Description
tests/integration/test_nonplatform_wheel.py	Added new test test_non_platform_wheel_pure_allow to verify pure Python wheel handling with the new flag; parametrized existing tests to ensure the flag doesn't affect non-pure-Python error cases
src/auditwheel/main_show.py	Added --allow-pure-python-wheel argument; tracks whether a wheel is pure Python and returns success (0) when the flag is set for pure Python wheels
src/auditwheel/main_repair.py	Added --allow-pure-python-wheel argument; copies pure Python wheels to the output directory unchanged when the flag is set, using samefile() check to avoid unnecessary copying

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[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 95.24%. Comparing base (430e67f) to head (4a6f571).
⚠️ Report is 1 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #660      +/-   ##
==========================================
+ Coverage   95.20%   95.24%   +0.03%     
==========================================
  Files          22       22              
  Lines        1815     1829      +14     
  Branches      340      343       +3     
==========================================
+ Hits         1728     1742      +14     
  Misses         48       48              
  Partials       39       39              

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[Copilot]

Pull request overview

Copilot reviewed 3 out of 3 changed files in this pull request and generated no new comments.

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