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"""
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 importlib
import contextlib
from os.path import dirname
@contextlib.contextmanager
def patch_sys_path():
orig = sys.path[:]
sys.path[:] = [dirname(dirname(__file__))]
try:
yield
finally:
sys.path[:] = orig
def ensure_local_distutils():
if 'distutils' in sys.path:
raise RuntimeError("Distutils must not be imported before setuptools")
with patch_sys_path():
importlib.import_module('distutils')
ensure_local_distutils()
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