mirror of
https://github.com/PiBrewing/craftbeerpi4.git
synced 2024-11-22 23:18:12 +01:00
61 lines
1.7 KiB
Python
61 lines
1.7 KiB
Python
"""
|
|
Ensure that the local copy of distutils is preferred over stdlib.
|
|
|
|
See https://github.com/pypa/setuptools/issues/417#issuecomment-392298401
|
|
for more motivation.
|
|
"""
|
|
|
|
import sys
|
|
import re
|
|
import os
|
|
import importlib
|
|
import warnings
|
|
|
|
|
|
is_pypy = '__pypy__' in sys.builtin_module_names
|
|
|
|
|
|
def warn_distutils_present():
|
|
if 'distutils' not in sys.modules:
|
|
return
|
|
if is_pypy and sys.version_info < (3, 7):
|
|
# PyPy for 3.6 unconditionally imports distutils, so bypass the warning
|
|
# https://foss.heptapod.net/pypy/pypy/-/blob/be829135bc0d758997b3566062999ee8b23872b4/lib-python/3/site.py#L250
|
|
return
|
|
warnings.warn(
|
|
"Distutils was imported before Setuptools. This usage is discouraged "
|
|
"and may exhibit undesirable behaviors or errors. Please use "
|
|
"Setuptools' objects directly or at least import Setuptools first.")
|
|
|
|
|
|
def clear_distutils():
|
|
if 'distutils' not in sys.modules:
|
|
return
|
|
warnings.warn("Setuptools is replacing distutils.")
|
|
mods = [name for name in sys.modules if re.match(r'distutils\b', name)]
|
|
for name in mods:
|
|
del sys.modules[name]
|
|
|
|
|
|
def enabled():
|
|
"""
|
|
Allow selection of distutils by environment variable.
|
|
"""
|
|
which = os.environ.get('SETUPTOOLS_USE_DISTUTILS', 'stdlib')
|
|
return which == 'local'
|
|
|
|
|
|
def ensure_local_distutils():
|
|
clear_distutils()
|
|
distutils = importlib.import_module('setuptools._distutils')
|
|
distutils.__name__ = 'distutils'
|
|
sys.modules['distutils'] = distutils
|
|
|
|
# sanity check that submodules load as expected
|
|
core = importlib.import_module('distutils.core')
|
|
assert '_distutils' in core.__file__, core.__file__
|
|
|
|
|
|
warn_distutils_present()
|
|
if enabled():
|
|
ensure_local_distutils()
|