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74 lines
2.3 KiB
74 lines
2.3 KiB
3 years ago
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# Copyright 2021 The Meson development team
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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# http://www.apache.org/licenses/LICENSE-2.0
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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'''
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This module soly exists to work around a pathlib.resolve bug on
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certain Windows systems:
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https://github.com/mesonbuild/meson/issues/7295
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https://bugs.python.org/issue31842
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It should **never** be used directly. Instead, it is automatically
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used when `import pathlib` is used. This is achieved by messing with
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`sys.modules['pathlib']` in mesonmain.
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Additionally, the sole purpose of this module is to work around a
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python bug. This only bugfixes to pathlib functions and classes are
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allowed here. Finally, this file should be removed once all upstream
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python bugs are fixed and it is OK to tell our users to "just upgrade
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python".
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'''
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import pathlib
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import os
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import platform
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__all__ = [
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'PurePath',
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'PurePosixPath',
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'PureWindowsPath',
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'Path',
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]
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PurePath = pathlib.PurePath
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PurePosixPath = pathlib.PurePosixPath
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PureWindowsPath = pathlib.PureWindowsPath
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# Only patch on platforms where the bug occurs
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if platform.system().lower() in {'windows'}:
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# Can not directly inherit from pathlib.Path because the __new__
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# operator of pathlib.Path() returns a {Posix,Windows}Path object.
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class Path(type(pathlib.Path())):
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def resolve(self, strict: bool = False) -> 'Path':
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'''
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Work around a resolve bug on certain Windows systems:
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https://github.com/mesonbuild/meson/issues/7295
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https://bugs.python.org/issue31842
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'''
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try:
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return super().resolve(strict=strict)
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except OSError:
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return Path(os.path.normpath(self))
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else:
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Path = pathlib.Path
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PosixPath = pathlib.PosixPath
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WindowsPath = pathlib.WindowsPath
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__all__ += [
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'PosixPath',
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'WindowsPath',
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]
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