/run_sed

 1#!/usr/bin/env python2.6
 2
 3"""Run sed from a script, but do it as though it is being used in a Makefile.
 4
 5The difference between this and its use in the makefile itself is that here we
 6don't escape $ to $$.
 7"""
 8
 9from __future__ import print_function, division
10
11import os
12import sys
13
14from optparse import OptionParser
15from util import template
16
17def main(opts, args):
18  ns = template.Template()
19
20  sed_args = ["sed"]
21  text = ns.expand_file(args[0],
22                        transform_after=ns.xfunc_sed_lines_to_args())
23  sed_args.extend(text.split('\n'))
24  sed_args.extend(args[1:])
25
26  if opts.show_cmd:
27    import pprint
28    pprint.pprint(sed_args, stream=sys.stderr)
29
30  # Ensure that sed still works with international characters (and doesn't just
31  # hang)
32  os.putenv("LANG", "C")
33  with os.popen(" ".join(sed_args)) as f:
34    print(f.read())
35
36if __name__ == '__main__':
37  op = OptionParser()
38  op.add_option("-c", "--show_cmd", dest="show_cmd", default=False,
39                action="store_true", help="show sed script")
40
41  opts, args = op.parse_args()
42  main(opts, args)