# -----------------------------------------------------------------------------
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# Copyright (c) 2023, 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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import sys
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import os
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# A boolean indicating whether the frozen application is a macOS .app bundle.
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is_macos_app_bundle = sys.platform == 'darwin' and sys._MEIPASS.endswith("Contents/Frameworks")
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def prepend_path_to_environment_variable(path, variable_name):
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"""
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Prepend the given path to the list of paths stored in the given environment variable (separated by `os.pathsep`).
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If the given path is already specified in the environment variable, no changes are made. If the environment variable
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is not set or is empty, it is set/overwritten with the given path.
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"""
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stored_paths = os.environ.get(variable_name)
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if stored_paths:
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# If path is already included, make this a no-op. NOTE: we need to split the string and search in the list of
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# substrings to find an exact match; searching in the original string might erroneously match a prefix of a
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# longer (i.e., sub-directory) path when such entry already happens to be in PATH (see #8857).
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if path in stored_paths.split(os.pathsep):
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return
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# Otherwise, prepend the path
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stored_paths = path + os.pathsep + stored_paths
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else:
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stored_paths = path
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os.environ[variable_name] = stored_paths
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