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"""
Monkey patching of distutils.
"""
import sys
import distutils.filelist
import platform
import types
import functools
from importlib import import_module
import inspect
from setuptools.extern import six
import setuptools
__all__ = []
"""
Everything is private. Contact the project team
if you think you need this functionality.
"""
def _get_mro(cls):
"""
Returns the bases classes for cls sorted by the MRO.
Works around an issue on Jython where inspect.getmro will not return all
base classes if multiple classes share the same name. Instead, this
function will return a tuple containing the class itself, and the contents
of cls.__bases__. See https://github.com/pypa/setuptools/issues/1024.
"""
if platform.python_implementation() == "Jython":
return (cls,) + cls.__bases__
return inspect.getmro(cls)
def get_unpatched(item):
lookup = (
get_unpatched_class if isinstance(item, six.class_types) else
get_unpatched_function if isinstance(item, types.FunctionType) else
lambda item: None
)
return lookup(item)
def get_unpatched_class(cls):
"""Protect against re-patching the distutils if reloaded
Also ensures that no other distutils extension monkeypatched the distutils
first.
"""
external_bases = (
cls
for cls in _get_mro(cls)
if not cls.__module__.startswith('setuptools')
)
base = next(external_bases)
if not base.__module__.startswith('distutils'):
msg = "distutils has already been patched by %r" % cls
raise AssertionError(msg)
return base
def patch_all():
# we can't patch distutils.cmd, alas
distutils.core.Command = setuptools.Command
has_issue_12885 = sys.version_info <= (3, 5, 3)
if has_issue_12885:
# fix findall bug in distutils (http://bugs.python.org/issue12885)
distutils.filelist.findall = setuptools.findall
needs_warehouse = (
sys.version_info < (2, 7, 13)
or
(3, 0) < sys.version_info < (3, 3, 7)
or
(3, 4) < sys.version_info < (3, 4, 6)
or
(3, 5) < sys.version_info <= (3, 5, 3)
)
if needs_warehouse:
warehouse = 'https://upload.pypi.org/legacy/'
distutils.config.PyPIRCCommand.DEFAULT_REPOSITORY = warehouse
_patch_distribution_metadata_write_pkg_file()
_patch_distribution_metadata_write_pkg_info()
# Install Distribution throughout the distutils
for module in distutils.dist, distutils.core, distutils.cmd:
module.Distribution = setuptools.dist.Distribution
# Install the patched Extension
distutils.core.Extension = setuptools.extension.Extension
distutils.extension.Extension = setuptools.extension.Extension
if 'distutils.command.build_ext' in sys.modules:
sys.modules['distutils.command.build_ext'].Extension = (
setuptools.extension.Extension
)
patch_for_msvc_specialized_compiler()
def _patch_distribution_metadata_write_pkg_file():
"""Patch write_pkg_file to also write Requires-Python/Requires-External"""
distutils.dist.DistributionMetadata.write_pkg_file = (
setuptools.dist.write_pkg_file
)
def _patch_distribution_metadata_write_pkg_info():
"""
Workaround issue #197 - Python 3 prior to 3.2.2 uses an environment-local
encoding to save the pkg_info. Monkey-patch its write_pkg_info method to
correct this undesirable behavior.
"""
environment_local = (3,) <= sys.version_info[:3] < (3, 2, 2)
if not environment_local:
return
distutils.dist.DistributionMetadata.write_pkg_info = (
setuptools.dist.write_pkg_info
)
def patch_func(replacement, target_mod, func_name):
"""
Patch func_name in target_mod with replacement
Important - original must be resolved by name to avoid
patching an already patched function.
"""
original = getattr(target_mod, func_name)
# set the 'unpatched' attribute on the replacement to
# point to the original.
vars(replacement).setdefault('unpatched', original)
# replace the function in the original module
setattr(target_mod, func_name, replacement)
def get_unpatched_function(candidate):
return getattr(candidate, 'unpatched')
def patch_for_msvc_specialized_compiler():
"""
Patch functions in distutils to use standalone Microsoft Visual C++
compilers.
"""
# import late to avoid circular imports on Python < 3.5
msvc = import_module('setuptools.msvc')
if platform.system() != 'Windows':
# Compilers only availables on Microsoft Windows
return
def patch_params(mod_name, func_name):
"""
Prepare the parameters for patch_func to patch indicated function.
"""
repl_prefix = 'msvc9_' if 'msvc9' in mod_name else 'msvc14_'
repl_name = repl_prefix + func_name.lstrip('_')
repl = getattr(msvc, repl_name)
mod = import_module(mod_name)
if not hasattr(mod, func_name):
raise ImportError(func_name)
return repl, mod, func_name
# Python 2.7 to 3.4
msvc9 = functools.partial(patch_params, 'distutils.msvc9compiler')
# Python 3.5+
msvc14 = functools.partial(patch_params, 'distutils._msvccompiler')
try:
# Patch distutils.msvc9compiler
patch_func(*msvc9('find_vcvarsall'))
patch_func(*msvc9('query_vcvarsall'))
except ImportError:
pass
try:
# Patch distutils._msvccompiler._get_vc_env
patch_func(*msvc14('_get_vc_env'))
except ImportError:
pass
try:
# Patch distutils._msvccompiler.gen_lib_options for Numpy
patch_func(*msvc14('gen_lib_options'))
except ImportError:
pass