#-----------------------------------------------------------------------------
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# Copyright (c) 2024, PyInstaller Development Team.
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#
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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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#
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# The full license is in the file COPYING.txt, distributed with this software.
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#
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# SPDX-License-Identifier: Apache-2.0
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#-----------------------------------------------------------------------------
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# Override the findlibs.find() function to give precedence to sys._MEIPASS, followed by `ctypes.util.find_library`,
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# and only then the hard-coded paths from the original implementation. The main aim here is to avoid loading libraries
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# from Homebrew environment on macOS when it happens to be present at run-time and we have a bundled copy collected from
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# the build system. This happens because we (try not to) modify `DYLD_LIBRARY_PATH`, and the original `findlibs.find()`
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# implementation gives precedence to environment variables and several fixed/hard-coded locations, and uses
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# `ctypes.util.find_library` as the final fallback...
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def _pyi_rthook():
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import sys
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import os
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import ctypes.util
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# findlibs v0.1.0 broke compatibility with python < 3.10; due to incompatible typing annotation, attempting to
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# import the package raises `TypeError: unsupported operand type(s) for |: 'type' and 'NoneType'`. Gracefully
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# handle this situation by making this run-time hook no-op, in order to avoid crashing the frozen program even
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# if it would never end up importing/using `findlibs`.
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try:
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import findlibs
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except TypeError:
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return
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_orig_find = getattr(findlibs, 'find', None)
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def _pyi_find(lib_name, *args, **kwargs):
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extension = findlibs.EXTENSIONS.get(sys.platform, ".so")
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# First check sys._MEIPASS
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fullname = os.path.join(sys._MEIPASS, "lib{}{}".format(lib_name, extension))
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if os.path.isfile(fullname):
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return fullname
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# Fall back to `ctypes.util.find_library` (to give it precedence over hard-coded paths from original
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# implementation).
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lib = ctypes.util.find_library(lib_name)
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if lib is not None:
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return lib
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# Finally, fall back to original implementation
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if _orig_find is not None:
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return _orig_find(lib_name, *args, **kwargs)
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return None
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findlibs.find = _pyi_find
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_pyi_rthook()
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del _pyi_rthook
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