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annotate venv/lib/python2.7/site-packages/setuptools/extension.py @ 0:d67268158946 draft

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planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
author bcclaywell
date Mon, 12 Oct 2015 17:43:33 -0400
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1 import sys
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2 import re
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3 import functools
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4 import distutils.core
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5 import distutils.errors
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6 import distutils.extension
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7
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8 from .dist import _get_unpatched
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9 from . import msvc9_support
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10
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11 _Extension = _get_unpatched(distutils.core.Extension)
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12
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13 msvc9_support.patch_for_specialized_compiler()
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14
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15 def have_pyrex():
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16 """
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17 Return True if Cython or Pyrex can be imported.
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18 """
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19 pyrex_impls = 'Cython.Distutils.build_ext', 'Pyrex.Distutils.build_ext'
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20 for pyrex_impl in pyrex_impls:
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21 try:
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22 # from (pyrex_impl) import build_ext
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23 __import__(pyrex_impl, fromlist=['build_ext']).build_ext
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24 return True
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25 except Exception:
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26 pass
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27 return False
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28
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29
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30 class Extension(_Extension):
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31 """Extension that uses '.c' files in place of '.pyx' files"""
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32
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33 def __init__(self, *args, **kw):
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34 _Extension.__init__(self, *args, **kw)
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35 self._convert_pyx_sources_to_lang()
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36
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37 def _convert_pyx_sources_to_lang(self):
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38 """
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39 Replace sources with .pyx extensions to sources with the target
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40 language extension. This mechanism allows language authors to supply
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41 pre-converted sources but to prefer the .pyx sources.
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42 """
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43 if have_pyrex():
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44 # the build has Cython, so allow it to compile the .pyx files
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45 return
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46 lang = self.language or ''
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47 target_ext = '.cpp' if lang.lower() == 'c++' else '.c'
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48 sub = functools.partial(re.sub, '.pyx$', target_ext)
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49 self.sources = list(map(sub, self.sources))
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50
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51 class Library(Extension):
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52 """Just like a regular Extension, but built as a library instead"""
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53
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54 distutils.core.Extension = Extension
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55 distutils.extension.Extension = Extension
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56 if 'distutils.command.build_ext' in sys.modules:
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57 sys.modules['distutils.command.build_ext'].Extension = Extension