annotate env/lib/python3.7/site-packages/setuptools/extension.py @ 3:758bc20232e8 draft

"planemo upload commit 2a0fe2cc28b09e101d37293e53e82f61762262ec"
author shellac
date Thu, 14 May 2020 16:20:52 -0400
parents 26e78fe6e8c4
children
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1 import re
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2 import functools
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3 import distutils.core
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4 import distutils.errors
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5 import distutils.extension
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6
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7 from setuptools.extern.six.moves import map
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8
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9 from .monkey import get_unpatched
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11
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12 def _have_cython():
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13 """
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14 Return True if Cython can be imported.
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15 """
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16 cython_impl = 'Cython.Distutils.build_ext'
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17 try:
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18 # from (cython_impl) import build_ext
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19 __import__(cython_impl, fromlist=['build_ext']).build_ext
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20 return True
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21 except Exception:
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22 pass
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23 return False
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25
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26 # for compatibility
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27 have_pyrex = _have_cython
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28
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29 _Extension = get_unpatched(distutils.core.Extension)
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31
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32 class Extension(_Extension):
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33 """Extension that uses '.c' files in place of '.pyx' files"""
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34
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35 def __init__(self, name, sources, *args, **kw):
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36 # The *args is needed for compatibility as calls may use positional
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37 # arguments. py_limited_api may be set only via keyword.
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38 self.py_limited_api = kw.pop("py_limited_api", False)
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39 _Extension.__init__(self, name, sources, *args, **kw)
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40
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41 def _convert_pyx_sources_to_lang(self):
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42 """
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43 Replace sources with .pyx extensions to sources with the target
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44 language extension. This mechanism allows language authors to supply
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45 pre-converted sources but to prefer the .pyx sources.
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46 """
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47 if _have_cython():
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48 # the build has Cython, so allow it to compile the .pyx files
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49 return
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50 lang = self.language or ''
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51 target_ext = '.cpp' if lang.lower() == 'c++' else '.c'
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52 sub = functools.partial(re.sub, '.pyx$', target_ext)
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53 self.sources = list(map(sub, self.sources))
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54
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55
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56 class Library(Extension):
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57 """Just like a regular Extension, but built as a library instead"""