code.delx.au - transcoding/blob - rotate_args.py

   1 #!/usr/bin/env python
   2
   3 import optparse, subprocess, sys, os
   4
   5 def parse_args():
   6         parser = optparse.OptionParser(usage="%prog [options] -- args")
   7         parser.add_option("--program_name",
   8                 action="store", dest="program_name", default=None,
   9                 help="The name of the executable to run")
  10         parser.add_option("--dump",
  11                 action="store_true", dest="dump",
  12                 help="Print command that would be run on stdout")
  13         parser.add_option("--count",
  14                 action="store", type="int", dest="count",
  15                 help="The number of arguments to rotate")
  16
  17         opts, args = parser.parse_args(sys.argv[1:])
  18
  19         opts.args = args
  20         return opts
  21
  22 def run(args, dump):
  23         if dump:
  24                 print "".join(map(commands.mkarg, args))[1:]
  25         else:
  26                 return subprocess.Popen(args).wait()
  27
  28 def main():
  29         opts = parse_args()
  30
  31         newcmdline = [opts.program_name] + opts.args[-opts.count:] + opts.args[:-opts.count]
  32
  33         run(newcmdline, opts.dump)
  34
  35 if __name__ == "__main__":
  36         main()
  37