97c68e8fc5
These functions were already being treated as psuedo objects and had properties assigned to them setting what their paths were. That's a bit unusual and made it less obvious what the code was doing, but also forced the "system" function to know what all the possible path searching functions were so that they'd have their "path" property initialized properly in a central location. This change introduces a PathSearcFunc class which encapsulates the mechanisms of the old code and makes it implicitly extensible so that other path searching functions which might look in other directories can be added in other places. Change-Id: I7be28e51481a06ec83997677af99927709b18003 Reviewed-on: https://gem5-review.googlesource.com/5341 Reviewed-by: Andreas Sandberg <andreas.sandberg@arm.com> Maintainer: Andreas Sandberg <andreas.sandberg@arm.com>
68 lines
2.7 KiB
Python
68 lines
2.7 KiB
Python
# Copyright (c) 2006 The Regents of The University of Michigan
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# All rights reserved.
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#
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# Redistribution and use in source and binary forms, with or without
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# modification, are permitted provided that the following conditions are
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# met: redistributions of source code must retain the above copyright
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# notice, this list of conditions and the following disclaimer;
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# redistributions in binary form must reproduce the above copyright
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# notice, this list of conditions and the following disclaimer in the
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# documentation and/or other materials provided with the distribution;
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# neither the name of the copyright holders nor the names of its
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# contributors may be used to endorse or promote products derived from
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# this software without specific prior written permission.
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#
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# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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#
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# Authors: Ali Saidi
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import os, sys
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config_path = os.path.dirname(os.path.abspath(__file__))
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config_root = os.path.dirname(config_path)
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class PathSearchFunc(object):
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_sys_paths = None
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def __init__(self, *subdirs):
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self._subdir = os.path.join(*subdirs)
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def __call__(self, filename):
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if self._sys_paths is None:
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try:
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paths = os.environ['M5_PATH'].split(':')
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except KeyError:
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paths = [ '/dist/m5/system', '/n/poolfs/z/dist/m5/system' ]
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# expand '~' and '~user' in paths
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paths = map(os.path.expanduser, paths)
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# filter out non-existent directories
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paths = filter(os.path.isdir, paths)
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if not paths:
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raise IOError, "Can't find a path to system files."
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self._sys_paths = paths
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filepath = os.path.join(self._subdir, filename)
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paths = (os.path.join(p, filepath) for p in self._sys_paths)
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try:
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return next(p for p in paths if os.path.exists(p))
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except StopIteration:
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raise IOError, "Can't find file '%s' on path." % filename
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disk = PathSearchFunc('disks')
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binary = PathSearchFunc('binaries')
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script = PathSearchFunc('boot')
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