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enigmail  1.4.3
buildlist.py
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00001 # ***** BEGIN LICENSE BLOCK *****
00002 # Version: MPL 1.1/GPL 2.0/LGPL 2.1
00003 #
00004 # The contents of this file are subject to the Mozilla Public License Version
00005 # 1.1 (the "License"); you may not use this file except in compliance with
00006 # the License. You may obtain a copy of the License at
00007 # http://www.mozilla.org/MPL/
00008 #
00009 # Software distributed under the License is distributed on an "AS IS" basis,
00010 # WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
00011 # for the specific language governing rights and limitations under the
00012 # License.
00013 #
00014 # The Original Code is Mozilla build system.
00015 #
00016 # The Initial Developer of the Original Code is
00017 # Mozilla Foundation.
00018 # Portions created by the Initial Developer are Copyright (C) 2009
00019 # the Initial Developer. All Rights Reserved.
00020 #
00021 # Contributor(s):
00022 #  Ted Mielczarek <ted.mielczarek@gmail.com>
00023 #
00024 # Alternatively, the contents of this file may be used under the terms of
00025 # either the GNU General Public License Version 2 or later (the "GPL"), or
00026 # the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
00027 # in which case the provisions of the GPL or the LGPL are applicable instead
00028 # of those above. If you wish to allow use of your version of this file only
00029 # under the terms of either the GPL or the LGPL, and not to allow others to
00030 # use your version of this file under the terms of the MPL, indicate your
00031 # decision by deleting the provisiwons above and replace them with the notice
00032 # and other provisions required by the GPL or the LGPL. If you do not delete
00033 # the provisions above, a recipient may use your version of this file under
00034 # the terms of any one of the MPL, the GPL or the LGPL.
00035 #
00036 # ***** END LICENSE BLOCK *****
00037 
00038 '''A generic script to add entries to a file 
00039 if the entry does not already exist.
00040 
00041 Usage: buildlist.py <filename> <entry> [<entry> ...]
00042 '''
00043 
00044 import sys
00045 import os
00046 from utils import lockFile
00047 
00048 def addEntriesToListFile(listFile, entries):
00049   """Given a file |listFile| containing one entry per line,
00050   add each entry in |entries| to the file, unless it is already
00051   present."""
00052   lock = lockFile(listFile + ".lck")
00053   try:
00054     if os.path.exists(listFile):
00055       f = open(listFile)
00056       existing = set([x.strip() for x in f.readlines()])
00057       f.close()
00058     else:
00059       existing = set()
00060     f = open(listFile, 'a')
00061     for e in entries:
00062       if e not in existing:
00063         f.write("%s\n" % e)
00064         existing.add(e)
00065     f.close()
00066   finally:
00067     lock = None
00068 
00069 if __name__ == '__main__':
00070   if len(sys.argv) < 3:
00071     print >>sys.stderr, "Usage: buildlist.py <list file> <entry> [<entry> ...]"
00072     sys.exit(1)
00073   addEntriesToListFile(sys.argv[1], sys.argv[2:])