import sys, os

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from .error import VerificationError

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LIST_OF_FILE_NAMES = ['sources', 'include_dirs', 'library_dirs',

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'extra_objects', 'depends']

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def get_extension(srcfilename, modname, sources=(), **kwds):

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_hack_at_distutils()

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from distutils.core import Extension

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allsources = [srcfilename]

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for src in sources:

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allsources.append(os.path.normpath(src))

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return Extension(name=modname, sources=allsources, **kwds)

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def compile(tmpdir, ext, compiler_verbose=0, debug=None):

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"""Compile a C extension module using distutils."""

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_hack_at_distutils()

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saved_environ = os.environ.copy()

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try:

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outputfilename = _build(tmpdir, ext, compiler_verbose, debug)

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outputfilename = os.path.abspath(outputfilename)

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finally:

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# workaround for a distutils bugs where some env vars can

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# become longer and longer every time it is used

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for key, value in saved_environ.items():

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if os.environ.get(key) != value:

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os.environ[key] = value

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return outputfilename

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def _build(tmpdir, ext, compiler_verbose=0, debug=None):

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# XXX compact but horrible :-(

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from distutils.core import Distribution

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import distutils.errors, distutils.log

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#

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dist = Distribution({'ext_modules': [ext]})

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dist.parse_config_files()

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options = dist.get_option_dict('build_ext')

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if debug is None:

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debug = sys.flags.debug

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options['debug'] = ('ffiplatform', debug)

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options['force'] = ('ffiplatform', True)

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options['build_lib'] = ('ffiplatform', tmpdir)

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options['build_temp'] = ('ffiplatform', tmpdir)

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#

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try:

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old_level = distutils.log.set_threshold(0) or 0

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try:

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distutils.log.set_verbosity(compiler_verbose)

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dist.run_command('build_ext')

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cmd_obj = dist.get_command_obj('build_ext')

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[soname] = cmd_obj.get_outputs()

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finally:

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distutils.log.set_threshold(old_level)

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except (distutils.errors.CompileError,

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distutils.errors.LinkError) as e:

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raise VerificationError('%s: %s' % (e.__class__.__name__, e))

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#

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return soname

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try:

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from os.path import samefile

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except ImportError:

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def samefile(f1, f2):

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return os.path.abspath(f1) == os.path.abspath(f2)

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def maybe_relative_path(path):

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if not os.path.isabs(path):

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return path # already relative

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dir = path

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names = []

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while True:

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prevdir = dir

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dir, name = os.path.split(prevdir)

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if dir == prevdir or not dir:

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return path # failed to make it relative

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names.append(name)

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try:

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if samefile(dir, os.curdir):

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names.reverse()

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return os.path.join(*names)

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except OSError:

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pass

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# ____________________________________________________________

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try:

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int_or_long = (int, long)

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import cStringIO

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except NameError:

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int_or_long = int # Python 3

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import io as cStringIO

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def _flatten(x, f):

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if isinstance(x, str):

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f.write('%ds%s' % (len(x), x))

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elif isinstance(x, dict):

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keys = sorted(x.keys())

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f.write('%dd' % len(keys))

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for key in keys:

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_flatten(key, f)

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_flatten(x[key], f)

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elif isinstance(x, (list, tuple)):

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f.write('%dl' % len(x))

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for value in x:

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_flatten(value, f)

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elif isinstance(x, int_or_long):

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f.write('%di' % (x,))

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else:

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raise TypeError(

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"the keywords to verify() contains unsupported object %r" % (x,))

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def flatten(x):

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f = cStringIO.StringIO()

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_flatten(x, f)

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return f.getvalue()

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def _hack_at_distutils():

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# Windows-only workaround for some configurations: see

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# https://bugs.python.org/issue23246 (Python 2.7 with

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# a specific MS compiler suite download)

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if sys.platform == "win32":

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try:

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import setuptools # for side-effects, patches distutils

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except ImportError:

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pass

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