#33778: pyproject.toml uses the incorrect "legacy" setuptools backend and
unnecessary wheel dep
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Reporter: Michał Górny | Owner: nobody
Type: Bug | Status: new
Component: Packaging | Version: 4.0
Severity: Normal | Resolution:
Keywords: | Triage Stage: Accepted
Has patch: 0 | Needs documentation: 0
Needs tests: 0 | Patch needs improvement: 0
Easy pickings: 1 | UI/UX: 0
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Comment (by Florian Apolloner):
> The wheel dependency is redundant and discouraged here. Setuptools adds
this dependency via the backend automatically since day one. It was
historically included in the documentation but it was a mistake. See:
https://github.com/pypa/setuptools/commit/f7d30a9529378cf69054b5176249e5457aaf640a
Mhm, I can remember that some frontends did need it, not 100% sure though
nowadays
> The legacy backend was never supposed to be used in pyproject.toml. It
is only an "internal" fallback that is used by tools like pip when
pyproject.toml is not present at all. The regular backend must always be
used in pyproject.toml. See:
https://github.com/pypa/setuptools/issues/1689
This is a little bit more tricky. The problem here is that the presence of
`pyproject.toml` changes behavior. Hence our fix was using the
`__legacy__` backend. Most importantly `pip install -e` wouldn't work
otherwise.
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Ticket URL: <https://code.djangoproject.com/ticket/33778#comment:2>
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