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Document why we generate a dependency on wheel when the default build backend is used

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Miro Hrončok 2024-02-05 16:59:00 +01:00
parent 5aca0a6034
commit a069958530
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pyproject_buildrequires.py
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@ -248,6 +248,14 @@ def get_backend(requirements):
# with pyproject.toml without a specified build backend.
# If the default requirements change, also change them in the macro!
requirements.add('setuptools >= 40.8', source='default build backend')
# PEP 517 doesn't mandate depending on wheel when the default backend is used.
# Historically, it used to be assumed as necessary, but later it turned out to be wrong.
# See the removal in pip and build:
# https://github.com/pypa/pip/pull/12449
# https://github.com/pypa/build/pull/716
# However, the requirement *will* be generated by setuptools anyway
# as part of get_requires_for_build_wheel().
# So we might as well keep it to skip one redundant step.
requirements.add('wheel', source='default build backend')
requirements.check(source='build backend')