cpython/Lib/distutils/tests/setuptools_extension.py

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from distutils.core import Extension as _Extension
from distutils.core import Distribution as _Distribution
def _get_unpatched(cls):
"""Protect against re-patching the distutils if reloaded
Also ensures that no other distutils extension monkeypatched the distutils
first.
"""
while cls.__module__.startswith('setuptools'):
cls, = cls.__bases__
if not cls.__module__.startswith('distutils'):
raise AssertionError(
"distutils has already been patched by %r" % cls
)
return cls
_Distribution = _get_unpatched(_Distribution)
_Extension = _get_unpatched(_Extension)
try:
from Pyrex.Distutils.build_ext import build_ext
except ImportError:
have_pyrex = False
else:
have_pyrex = True
class Extension(_Extension):
"""Extension that uses '.c' files in place of '.pyx' files"""
if not have_pyrex:
# convert .pyx extensions to .c
def __init__(self,*args,**kw):
_Extension.__init__(self,*args,**kw)
sources = []
for s in self.sources:
if s.endswith('.pyx'):
sources.append(s[:-3]+'c')
else:
sources.append(s)
self.sources = sources
class Library(Extension):
"""Just like a regular Extension, but built as a library instead"""
import sys, distutils.core, distutils.extension
distutils.core.Extension = Extension
distutils.extension.Extension = Extension
if 'distutils.command.build_ext' in sys.modules:
sys.modules['distutils.command.build_ext'].Extension = Extension