New submission from Robert Bricheno :
PEP 566 added the metadata fields 'Description-Content-Type' and
'Provides-Extra':
https://www.python.org/dev/peps/pep-0566/
http://setuptools.readthedocs.io/en/latest/setuptools.html#metadata
Currently dist.py in CPython distutils will warn if they are set, e.g.:
`dist.py:261: UserWarning: Unknown distribution option:
'long_description_content_type'`
The warnings are emitted when using setuptools to build a wheel (say) if either
of the fields are defined. They seem spurious (I can still build wheels even if
I see this warning...). But they looked a bit scary to me as a new user.
There are a few possible ways to fix this. Long-term they should be fully
supported by distutils I suppose. In the short term, there are a few different
ways to make these warnings go away.
My preferred option would be to simply declare fields for these variables in
dist.py (as per setuptools). By declaring these variables, the warnings are no
longer displayed. long_description_content_type, at least, is being used in the
wild since:
pypa/sampleproject@5be0970
--
components: Distutils
messages: 315907
nosy: dstufft, eric.araujo, rbricheno
priority: normal
severity: normal
status: open
title: Support PEP 566 metadata in dist.py
type: enhancement
versions: Python 3.8
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