# Copyright (c) 2008 The Hewlett-Packard Development Company
# All rights reserved.
#
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# modification, are permitted provided that the following conditions are
# met: redistributions of source code must retain the above copyright
# notice, this list of conditions and the following disclaimer;
# redistributions in binary form must reproduce the above copyright
# notice, this list of conditions and the following disclaimer in the
# documentation and/or other materials provided with the distribution;
# neither the name of the copyright holders nor the names of its
# contributors may be used to endorse or promote products derived from
# this software without specific prior written permission.
#
# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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import os
from os.path import isdir, isfile, join as joinpath


confdir = os.environ.get('M5_CONFIG')

if not confdir:
    # HOME is not set when running regressions, due to use of scons
    # Execute() function.
    homedir = os.environ.get('HOME')
    if homedir and isdir(joinpath(homedir, '.m5')):
        confdir = joinpath(homedir, '.m5')

def get(name):
    if not confdir:
        return None
    conffile = joinpath(confdir, name)
    if not isfile(conffile):
        return None

    return conffile