1#!/usr/bin/env python
2# Copyright (c) 2011 The Chromium Authors. All rights reserved.
3# Use of this source code is governed by a BSD-style license that can be
4# found in the LICENSE file.
5
6"""cups-config wrapper.
7
8cups-config, at least on Ubuntu Lucid and Natty, dumps all
9cflags/ldflags/libs when passed the --libs argument.  gyp would like
10to keep these separate: cflags are only needed when compiling files
11that use cups directly, while libs are only needed on the final link
12line.
13
14TODO(evan): remove me once
15  https://bugs.launchpad.net/ubuntu/+source/cupsys/+bug/163704
16is fixed.
17"""
18
19import subprocess
20import sys
21
22def usage():
23  print 'usage: %s {--cflags|--ldflags|--libs}' % sys.argv[0]
24
25
26def run_cups_config(mode):
27  """Run cups-config with all --cflags etc modes, parse out the mode we want,
28  and return those flags as a list."""
29
30  cups = subprocess.Popen(['cups-config', '--cflags', '--ldflags', '--libs'],
31                          stdout=subprocess.PIPE)
32  flags = cups.communicate()[0].strip()
33
34  flags_subset = []
35  for flag in flags.split():
36    flag_mode = None
37    if flag.startswith('-l'):
38      flag_mode = '--libs'
39    elif (flag.startswith('-L') or flag.startswith('-Wl,')):
40      flag_mode = '--ldflags'
41    elif (flag.startswith('-I') or flag.startswith('-D')):
42      flag_mode = '--cflags'
43
44    # Be conservative: for flags where we don't know which mode they
45    # belong in, always include them.
46    if flag_mode is None or flag_mode == mode:
47      flags_subset.append(flag)
48
49  return flags_subset
50
51
52def main():
53  if len(sys.argv) != 2:
54    usage()
55    return 1
56
57  mode = sys.argv[1]
58  if mode not in ('--cflags', '--libs', '--ldflags'):
59    usage()
60    return 1
61  flags = run_cups_config(mode)
62  print ' '.join(flags)
63  return 0
64
65
66if __name__ == '__main__':
67  sys.exit(main())
68