Vehicle-cpp/hkpc/software/pbr/tests/util.py

# Copyright (c) 2013 Hewlett-Packard Development Company, L.P.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
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# implied.
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# limitations under the License.
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# Copyright (C) 2013 Association of Universities for Research in Astronomy
#                    (AURA)
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# modification, are permitted provided that the following conditions are met:
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import contextlib
import os
import shutil
import stat
import sys

try:
    import ConfigParser as configparser
except ImportError:
    import configparser


@contextlib.contextmanager
def open_config(filename):
    if sys.version_info >= (3, 2):
        cfg = configparser.ConfigParser()
    else:
        cfg = configparser.SafeConfigParser()
    cfg.read(filename)
    yield cfg
    with open(filename, 'w') as fp:
        cfg.write(fp)


def rmtree(path):
    """shutil.rmtree() with error handler.

    Handle 'access denied' from trying to delete read-only files.
    """

    def onerror(func, path, exc_info):
        if not os.access(path, os.W_OK):
            os.chmod(path, stat.S_IWUSR)
            func(path)
        else:
            raise

    return shutil.rmtree(path, onerror=onerror)