New submission from Tzu-ping Chung <uranu...@gmail.com>:
On POSIX, the user scheme has a different 'platlib' location between distutils
and sysconfig, dispite the comment claiming they should be the same.
This can be reproduced on Fedora 34's stock Python 3.9:
$ docker run -it --rm -h=p fedora:34 bash
...
[root@p /]# yum install python3 -y
...
[root@p /]# type python3
python3 is hashed (/usr/bin/python3)
[root@p /]# python3 -V
Python 3.9.6
[root@p /]# python3.9 -q
>>> from distutils.command.install import install
>>> from distutils.dist import Distribution
>>> c = install(Distribution())
>>> c.user = True
>>> c.finalize_options()
>>> c.install_platlib
'/root/.local/lib/python3.9/site-packages'
>>> import sysconfig
>>> sysconfig.get_path('platlib', 'posix_user')
'/root/.local/lib64/python3.9/site-packages'
This issue was introduced by the sys.platlibdir value, and its usage in
distutils and sysconfig. sysconfig sets posix_user's lib paths like this:
'purelib': '{userbase}/lib/python{py_version_short}/site-packages',
'platlib': '{userbase}/{platlibdir}/python{py_version_short}/site-packages',
https://github.com/python/cpython/blob/a40675c659cd8c0699f85ee9ac31660f93f8c2f5/Lib/sysconfig.py#L100-L108
But distutils naively sets both to the same value that does not account for
platlibdir:
'purelib': '$usersite',
'platlib': '$usersite',
https://github.com/python/cpython/blob/a40675c659cd8c0699f85ee9ac31660f93f8c2f5/Lib/distutils/command/install.py#L68-L87
causing the mismatch, dispite the comment above clearly indicating the values
are supposed to be the same.
This was introduced in bpo-1294959 which changed the platlib template to depend
on sys.platlibdir, so a mismatch happens when the value of sys.platlibdir is
not 'lib'.
(Adding frenzy and vstinner to the nosy list since you introduced the comment
in distutils and the sys.platlibdir change, respectively.)
----------
components: Distutils
messages: 399186
nosy: dstufft, eric.araujo, frenzy, uranusjr, vstinner
priority: normal
severity: normal
status: open
title: sysconfig's posix_user scheme has different platlib value to distutils's
unix_user
versions: Python 3.10, Python 3.11, Python 3.9
_______________________________________
Python tracker <rep...@bugs.python.org>
<https://bugs.python.org/issue44860>
_______________________________________
_______________________________________________
Python-bugs-list mailing list
Unsubscribe:
https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
