scripts/build/pytt.py

   1 #! /usr/bin/python
   2
   3 '''
   4     Copyright (C) 2008--2010 Jan Nieuwenhuizen <janneke@gnu.org>
   5
   6     This program is free software; you can redistribute it and/or
   7     modify it under the terms of the GNU General Public License as
   8     published by the Free Software Foundation; either version 3 of the
   9     License, or (at your option) any later version.
  10
  11     This program is distributed in the hope that it will be useful,
  12     but WITHOUT ANY WARRANTY; without even the implied warranty of
  13     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14     GNU General Public License for more details.
  15
  16     You should have received a copy of the GNU General Public License
  17     along with this program.  If not, see <http://www.gnu.org/licenses/>.
  18 '''
  19
  20 import os
  21 import re
  22 import stat
  23 import sys
  24
  25 dry_run = False
  26
  27 def pytt (from_re, to, file_name):
  28     s = file (file_name).read ()
  29     name = os.path.basename (file_name)
  30     base, ext = os.path.splitext (name)
  31     t = re.sub (from_re, to % locals (), s)
  32     if s != t:
  33         if dry_run:
  34             sys.stdout.write (t)
  35         else:
  36             stat_info = os.stat (file_name)
  37             mode = stat.S_IMODE (stat_info[stat.ST_MODE])
  38             os.system ('mv --backup=t %(file_name)s %(file_name)s~' % locals ())
  39             file (file_name, 'w').write (t)
  40             os.chmod (file_name, mode)
  41
  42 def main ():
  43     from_re = re.compile (sys.argv[1], re.MULTILINE)
  44     to = sys.argv[2]
  45     if not sys.argv[3:] or sys.argv[3] == '-':
  46         sys.stdout.write (re.sub (from_re, to, sys.stdin.read ()))
  47     else:
  48         for f in sys.argv[3:]:
  49             pytt (from_re, to, f)
  50
  51 if __name__ == '__main__':
  52     main ()