You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
129 lines
3.6 KiB
129 lines
3.6 KiB
import sys
|
|
import os
|
|
import re
|
|
import importlib
|
|
import warnings
|
|
|
|
|
|
is_pypy = '__pypy__' in sys.builtin_module_names
|
|
|
|
|
|
warnings.filterwarnings('ignore',
|
|
'.+ distutils .+ deprecated',
|
|
DeprecationWarning)
|
|
|
|
|
|
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, but importing Setuptools "
|
|
"also replaces the `distutils` module in `sys.modules`. This may lead "
|
|
"to undesirable behaviors or errors. To avoid these issues, avoid "
|
|
"using distutils directly, ensure that setuptools is installed in the "
|
|
"traditional way (e.g. not an editable install), and/or make sure "
|
|
"that setuptools is always imported before distutils.")
|
|
|
|
|
|
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__
|
|
|
|
|
|
def do_override():
|
|
"""
|
|
Ensure that the local copy of distutils is preferred over stdlib.
|
|
|
|
See https://github.com/pypa/setuptools/issues/417#issuecomment-392298401
|
|
for more motivation.
|
|
"""
|
|
if enabled():
|
|
warn_distutils_present()
|
|
ensure_local_distutils()
|
|
|
|
|
|
class DistutilsMetaFinder:
|
|
def find_spec(self, fullname, path, target=None):
|
|
if path is not None:
|
|
return
|
|
|
|
method_name = 'spec_for_{fullname}'.format(**locals())
|
|
method = getattr(self, method_name, lambda: None)
|
|
return method()
|
|
|
|
def spec_for_distutils(self):
|
|
import importlib.abc
|
|
import importlib.util
|
|
|
|
class DistutilsLoader(importlib.abc.Loader):
|
|
|
|
def create_module(self, spec):
|
|
return importlib.import_module('setuptools._distutils')
|
|
|
|
def exec_module(self, module):
|
|
pass
|
|
|
|
return importlib.util.spec_from_loader('distutils', DistutilsLoader())
|
|
|
|
def spec_for_pip(self):
|
|
"""
|
|
Ensure stdlib distutils when running under pip.
|
|
See pypa/pip#8761 for rationale.
|
|
"""
|
|
if self.pip_imported_during_build():
|
|
return
|
|
clear_distutils()
|
|
self.spec_for_distutils = lambda: None
|
|
|
|
@staticmethod
|
|
def pip_imported_during_build():
|
|
"""
|
|
Detect if pip is being imported in a build script. Ref #2355.
|
|
"""
|
|
import traceback
|
|
return any(
|
|
frame.f_globals['__file__'].endswith('setup.py')
|
|
for frame, line in traceback.walk_stack(None)
|
|
)
|
|
|
|
|
|
DISTUTILS_FINDER = DistutilsMetaFinder()
|
|
|
|
|
|
def add_shim():
|
|
sys.meta_path.insert(0, DISTUTILS_FINDER)
|
|
|
|
|
|
def remove_shim():
|
|
try:
|
|
sys.meta_path.remove(DISTUTILS_FINDER)
|
|
except ValueError:
|
|
pass
|