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python module: stop using distutils schemes on sufficiently new Debian 

Since 3.10.3, Debian finally started patching sysconfig with custom
paths, instead of just distutils. This means we can now go use that
instead. It reduces our reliance on the deprecated distutils module.

Partial fix for #7702
This commit is contained in:
Eli Schwartz 2022-11-21 20:47:14 -05:00 committed by Eli Schwartz
parent 9f610ad5b7
commit 40f897fa92
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1 changed files with 24 additions and 8 deletions
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32
mesonbuild/scripts/python_info.py
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@ -13,7 +13,6 @@ if sys.path[0].endswith('scripts'):
del sys.path[0]
import json, os, sysconfig
import distutils.command.install
def get_distutils_paths(scheme=None, prefix=None):
import distutils.dist
@ -37,15 +36,32 @@ def get_distutils_paths(scheme=None, prefix=None):
# default scheme to a custom one pointing to /usr/local and replacing
# site-packages with dist-packages.
# See https://github.com/mesonbuild/meson/issues/8739.
# XXX: We should be using sysconfig, but Debian only patches distutils.
#
# We should be using sysconfig, but before 3.10.3, Debian only patches distutils.
# So we may end up falling back.
if 'deb_system' in distutils.command.install.INSTALL_SCHEMES:
paths = get_distutils_paths(scheme='deb_system')
install_paths = get_distutils_paths(scheme='deb_system', prefix='')
else:
paths = sysconfig.get_paths()
def get_install_paths():
if sys.version_info >= (3, 10):
scheme = sysconfig.get_default_scheme()
else:
scheme = sysconfig._get_default_scheme()
if sys.version_info >= (3, 10, 3):
if 'deb_system' in sysconfig.get_scheme_names():
scheme = 'deb_system'
else:
import distutils.command.install
if 'deb_system' in distutils.command.install.INSTALL_SCHEMES:
paths = get_distutils_paths(scheme='deb_system')
install_paths = get_distutils_paths(scheme='deb_system', prefix='')
return paths, install_paths
paths = sysconfig.get_paths(scheme=scheme)
empty_vars = {'base': '', 'platbase': '', 'installed_base': ''}
install_paths = sysconfig.get_paths(vars=empty_vars)
install_paths = sysconfig.get_paths(scheme=scheme, vars=empty_vars)
return paths, install_paths
paths, install_paths = get_install_paths()
def links_against_libpython():
from distutils.core import Distribution, Extension