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123 lines
3.2 KiB
Python
Executable File
123 lines
3.2 KiB
Python
Executable File
#!/usr/bin/env python
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# ***** BEGIN LICENSE BLOCK *****
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# Version: MPL 1.1/GPL 2.0/LGPL 2.1
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#
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# The contents of this file are subject to the Mozilla Public License Version
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# 1.1 (the "License"); you may not use this file except in compliance with
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# the License. You may obtain a copy of the License at
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# http://www.mozilla.org/MPL/
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#
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# Software distributed under the License is distributed on an "AS IS" basis,
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# WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
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# for the specific language governing rights and limitations under the
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# License.
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#
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# The Original Code is [Open Source Virtual Machine].
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#
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# The Initial Developer of the Original Code is
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# Adobe System Incorporated.
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# Portions created by the Initial Developer are Copyright (C) 2005-2006
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# the Initial Developer. All Rights Reserved.
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#
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# Contributor(s):
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#
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# Alternatively, the contents of this file may be used under the terms of
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# either the GNU General Public License Version 2 or later (the "GPL"), or
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# the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
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# in which case the provisions of the GPL or the LGPL are applicable instead
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# of those above. If you wish to allow use of your version of this file only
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# under the terms of either the GPL or the LGPL, and not to allow others to
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# use your version of this file under the terms of the MPL, indicate your
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# decision by deleting the provisions above and replace them with the notice
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# and other provisions required by the GPL or the LGPL. If you do not delete
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# the provisions above, a recipient may use your version of this file under
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# the terms of any one of the MPL, the GPL or the LGPL.
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#
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# ***** END LICENSE BLOCK *****
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import os
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from stat import *
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class StatCache:
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def __init__(self):
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self._dict = {}
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def getStat(self, key):
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if not key in self._dict:
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try:
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self._dict[key] = os.stat(key)
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except OSError:
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self._dict[key] = None
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return self._dict[key]
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def getMTime(self, key):
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s = self.getStat(key);
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if s == None:
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return 0;
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return s.st_mtime
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_statcache = StatCache()
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def rebuildNeeded(file, dependencies):
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"""Calculate whether a file needs to be rebuilt by comparing its timestamp
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against a list of dependencies.
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returns True or False"""
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f = _statcache.getMTime(file)
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if f == 0:
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return True
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for dep in dependencies:
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d = _statcache.getMTime(dep)
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if d == 0 or d > f:
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return True
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return False
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def rebuildsNeeded(files, outfile):
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"""Write a makefile snippet indicating whether object files need to be
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rebuilt.
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@param files: a dictionary of { 'objfile', 'depfile' }"""
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ostream = open(outfile, "w")
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for (objfile, depfile) in files.items():
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rebuild = True
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try:
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d = open(depfile, "r")
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rebuild = \
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rebuildNeeded(objfile, \
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[line.rstrip("\n\r") for line in d.readlines()])
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d.close()
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except IOError:
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pass
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if rebuild:
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ostream.write(objfile + ": FORCE\n")
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ostream.close()
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if __name__ == "__main__":
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import sys
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import re
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_argExpr = re.compile("\\.(ii)$")
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files = {}
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sys.argv.pop(0)
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outfile = sys.argv.pop(0)
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for objfile in sys.argv:
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depfile = _argExpr.sub(".deps", objfile)
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files[objfile] = depfile
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rebuildsNeeded(files, outfile)
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