virtuelle Umgebungen teil20 und teil20a
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								teil20/lib/python3.11/site-packages/_distutils_hack/__init__.py
									
									
									
									
									
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								teil20/lib/python3.11/site-packages/_distutils_hack/__init__.py
									
									
									
									
									
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# don't import any costly modules
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import sys
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import os
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is_pypy = '__pypy__' in sys.builtin_module_names
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def warn_distutils_present():
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    if 'distutils' not in sys.modules:
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        return
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    if is_pypy and sys.version_info < (3, 7):
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        # PyPy for 3.6 unconditionally imports distutils, so bypass the warning
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        # https://foss.heptapod.net/pypy/pypy/-/blob/be829135bc0d758997b3566062999ee8b23872b4/lib-python/3/site.py#L250
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        return
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    import warnings
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    warnings.warn(
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        "Distutils was imported before Setuptools, but importing Setuptools "
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        "also replaces the `distutils` module in `sys.modules`. This may lead "
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        "to undesirable behaviors or errors. To avoid these issues, avoid "
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        "using distutils directly, ensure that setuptools is installed in the "
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        "traditional way (e.g. not an editable install), and/or make sure "
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        "that setuptools is always imported before distutils."
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    )
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def clear_distutils():
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    if 'distutils' not in sys.modules:
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        return
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    import warnings
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    warnings.warn("Setuptools is replacing distutils.")
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    mods = [
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        name
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        for name in sys.modules
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        if name == "distutils" or name.startswith("distutils.")
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    ]
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    for name in mods:
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        del sys.modules[name]
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def enabled():
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    """
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    Allow selection of distutils by environment variable.
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    """
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    which = os.environ.get('SETUPTOOLS_USE_DISTUTILS', 'local')
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    return which == 'local'
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def ensure_local_distutils():
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    import importlib
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    clear_distutils()
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    # With the DistutilsMetaFinder in place,
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    # perform an import to cause distutils to be
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    # loaded from setuptools._distutils. Ref #2906.
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    with shim():
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        importlib.import_module('distutils')
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    # check that submodules load as expected
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    core = importlib.import_module('distutils.core')
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    assert '_distutils' in core.__file__, core.__file__
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    assert 'setuptools._distutils.log' not in sys.modules
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def do_override():
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    """
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    Ensure that the local copy of distutils is preferred over stdlib.
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    See https://github.com/pypa/setuptools/issues/417#issuecomment-392298401
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    for more motivation.
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    """
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    if enabled():
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        warn_distutils_present()
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        ensure_local_distutils()
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class _TrivialRe:
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    def __init__(self, *patterns):
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        self._patterns = patterns
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    def match(self, string):
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        return all(pat in string for pat in self._patterns)
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class DistutilsMetaFinder:
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    def find_spec(self, fullname, path, target=None):
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        # optimization: only consider top level modules and those
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        # found in the CPython test suite.
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        if path is not None and not fullname.startswith('test.'):
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            return
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        method_name = 'spec_for_{fullname}'.format(**locals())
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        method = getattr(self, method_name, lambda: None)
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        return method()
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    def spec_for_distutils(self):
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        if self.is_cpython():
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            return
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        import importlib
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        import importlib.abc
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        import importlib.util
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        try:
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            mod = importlib.import_module('setuptools._distutils')
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        except Exception:
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            # There are a couple of cases where setuptools._distutils
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            # may not be present:
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            # - An older Setuptools without a local distutils is
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            #   taking precedence. Ref #2957.
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            # - Path manipulation during sitecustomize removes
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            #   setuptools from the path but only after the hook
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            #   has been loaded. Ref #2980.
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            # In either case, fall back to stdlib behavior.
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            return
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        class DistutilsLoader(importlib.abc.Loader):
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            def create_module(self, spec):
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                mod.__name__ = 'distutils'
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                return mod
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            def exec_module(self, module):
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                pass
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        return importlib.util.spec_from_loader(
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            'distutils', DistutilsLoader(), origin=mod.__file__
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        )
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    @staticmethod
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    def is_cpython():
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        """
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        Suppress supplying distutils for CPython (build and tests).
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        Ref #2965 and #3007.
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        """
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        return os.path.isfile('pybuilddir.txt')
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    def spec_for_pip(self):
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        """
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        Ensure stdlib distutils when running under pip.
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        See pypa/pip#8761 for rationale.
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        """
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        if self.pip_imported_during_build():
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            return
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        clear_distutils()
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        self.spec_for_distutils = lambda: None
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    @classmethod
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    def pip_imported_during_build(cls):
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        """
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        Detect if pip is being imported in a build script. Ref #2355.
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        """
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        import traceback
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        return any(
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            cls.frame_file_is_setup(frame) for frame, line in traceback.walk_stack(None)
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        )
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    @staticmethod
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    def frame_file_is_setup(frame):
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        """
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        Return True if the indicated frame suggests a setup.py file.
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        """
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        # some frames may not have __file__ (#2940)
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        return frame.f_globals.get('__file__', '').endswith('setup.py')
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    def spec_for_sensitive_tests(self):
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        """
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        Ensure stdlib distutils when running select tests under CPython.
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        python/cpython#91169
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        """
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        clear_distutils()
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        self.spec_for_distutils = lambda: None
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    sensitive_tests = (
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        [
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            'test.test_distutils',
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            'test.test_peg_generator',
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            'test.test_importlib',
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        ]
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        if sys.version_info < (3, 10)
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        else [
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            'test.test_distutils',
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        ]
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    )
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for name in DistutilsMetaFinder.sensitive_tests:
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    setattr(
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        DistutilsMetaFinder,
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        f'spec_for_{name}',
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        DistutilsMetaFinder.spec_for_sensitive_tests,
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    )
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DISTUTILS_FINDER = DistutilsMetaFinder()
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def add_shim():
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    DISTUTILS_FINDER in sys.meta_path or insert_shim()
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class shim:
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    def __enter__(self):
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        insert_shim()
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    def __exit__(self, exc, value, tb):
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        remove_shim()
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def insert_shim():
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    sys.meta_path.insert(0, DISTUTILS_FINDER)
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def remove_shim():
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    try:
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        sys.meta_path.remove(DISTUTILS_FINDER)
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    except ValueError:
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        pass
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__import__('_distutils_hack').do_override()
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