helpers.py

# SPDX-License-Identifier: BSD-3-Clause
#
# Authors: Alexander Jung <alexander.jung@neclab.eu>
#
# Copyright (c) 2020, NEC Europe Ltd., NEC Corporation. All rights reserved.
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# modification, are permitted provided that the following conditions
# are met:
#
# 1. Redistributions of source code must retain the above copyright
#    notice, this list of conditions and the following disclaimer.
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#    this software without specific prior written permission.
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from __future__ import absolute_import
from __future__ import unicode_literals

import contextlib
import os


@contextlib.contextmanager
def cd(path):
    """
    A context manager which changes the working directory to the given
    path, and then changes it back to its previous value on exit.
    """
    prev_cwd = os.getcwd()
    os.chdir(path)
    try:
        yield
    finally:
        os.chdir(prev_cwd)