Unverified Commit ed26e4f2 authored by Filipe Laíns's avatar Filipe Laíns 🌈
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rfc0010: initial version



Signed-off-by: Filipe Laíns's avatarFilipe Laíns <lains@riseup.net>
parent 36ec95b8
=============================================
Adopt PEP 517 tooling for all Python packages
=============================================
- Date proposed: 2022-02-19
- RFC MR: https://gitlab.archlinux.org/archlinux/rfcs/-/merge_requests/0010
Summary
-------
Replace setup.py with PEP 517 tooling (python-build/python-installer) for all
Python packages.
Motivation
----------
There are two main points.
1) Direct ``setup.py`` calls are deprecated
The setuptools upstream has deprecated direct ``setup.py`` calls, and plans to
remove support for them in the future. Please see `setuptools #2088`_ and
`setuptools #2080`_ for more context.
2) ``setup.py install`` calls install old-style Python metadata
The metadata installed by ``setup.py install`` is the old-style "egg" format
(.egg-info). Is is essentially implementation-defined by setuptools and has been
replaced a standardized format (.dist-info).
By moving to the PEP 517 tooling, we will be using the wheel format, which has
the standardized metadata.
Specification
-------------
The change consists of replacing ``setup.py`` invocations with the
``python-build`` and ``python-installer`` tools.
Essentially replacing
::
python setup.py build
python setup.py install --root="$pkgdir" --optimize=1
with
::
python -m build --wheel --no-isolation
python -m installer --destdir="$pkgdir" dist/*.whl
You can find more information in the `Python packaging guidelines`_.
Drawbacks
---------
This change affects a big number of packages, so it will require some work per
part of the maintainers, but it can be done incrementally as packages are
updated.
Unresolved Questions
--------------------
None, I think.
Alternatives Considered
-----------------------
I don't think there is currently any viable alternative solution for the issues
presented.
.. _setuptools #2088: https://github.com/pypa/setuptools/issues/2088
.. _setuptools #2080: https://github.com/pypa/setuptools/issues/2080
.. _Python packaging guidelines: https://wiki.archlinux.org/title/Python_package_guidelines#Standards_based_(PEP_517)
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