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  • Committer: John Arbash Meinel
  • Date: 2006-09-05 13:57:30 UTC
  • mto: This revision was merged to the branch mainline in revision 1990.
  • Revision ID: john@arbash-meinel.com-20060905135730-d51221405aa03eb2
Create an osutils helper function for modifying the environment

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bzrlib/osutils.py
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    return width
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def supports_executable():
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    return sys.platform != "win32"
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def set_or_unset_env(env_variable, value):
 
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    """Modify the environment, setting or removing the env_variable.
 
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    :param env_variable: The environment variable in question
 
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    :param value: The value to set the environment to. If None, then
 
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        the variable will be removed.
 
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    :return: The original value of the environment variable.
 
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    """
 
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    orig_val = os.environ.get(env_variable)
 
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    if value is None:
 
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        if orig_val is not None:
 
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            del os.environ[env_variable]
 
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    else:
 
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        if isinstance(value, unicode):
 
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            value = value.encode(bzrlib.user_encoding)
 
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        os.environ[env_variable] = value
 
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    return orig_val
 
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_validWin32PathRE = re.compile(r'^([A-Za-z]:[/\\])?[^:<>*"?\|]*$')
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