53 lines
1.7 KiB
Python
53 lines
1.7 KiB
Python
import sys
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import re
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import functools
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import distutils.core
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import distutils.extension
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from setuptools.dist import _get_unpatched
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_Extension = _get_unpatched(distutils.core.Extension)
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def have_pyrex():
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"""
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Return True if Cython or Pyrex can be imported.
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"""
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pyrex_impls = 'Cython.Distutils.build_ext', 'Pyrex.Distutils.build_ext'
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for pyrex_impl in pyrex_impls:
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try:
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# from (pyrex_impl) import build_ext
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__import__(pyrex_impl, fromlist=['build_ext']).build_ext
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return True
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except Exception:
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pass
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return False
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class Extension(_Extension):
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"""Extension that uses '.c' files in place of '.pyx' files"""
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def __init__(self, *args, **kw):
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_Extension.__init__(self, *args, **kw)
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self._convert_pyx_sources_to_lang()
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def _convert_pyx_sources_to_lang(self):
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"""
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Replace sources with .pyx extensions to sources with the target
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language extension. This mechanism allows language authors to supply
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pre-converted sources but to prefer the .pyx sources.
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"""
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if have_pyrex():
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# the build has Cython, so allow it to compile the .pyx files
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return
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lang = self.language or ''
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target_ext = '.cpp' if lang.lower() == 'c++' else '.c'
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sub = functools.partial(re.sub, '.pyx$', target_ext)
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self.sources = list(map(sub, self.sources))
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class Library(Extension):
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"""Just like a regular Extension, but built as a library instead"""
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distutils.core.Extension = Extension
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distutils.extension.Extension = Extension
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if 'distutils.command.build_ext' in sys.modules:
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sys.modules['distutils.command.build_ext'].Extension = Extension
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