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1# Copyright (c) 2013 The Chromium Authors. All rights reserved.
2# Use of this source code is governed by a BSD-style license that can be
3# found in the LICENSE file.
4
5import json
6import subprocess
7import sys
8import re
9from optparse import OptionParser
10
11# This script runs pkg-config, optionally filtering out some results, and
12# returns the result.
13#
14# The result will be [ <includes>, <cflags>, <libs>, <lib_dirs> ] where each
15# member is itself a list of strings.
16#
17# You can filter out matches using "-v <regexp>" where all results from
18# pkgconfig matching the given regular expression will be ignored. You can
19# specify more than one regular expression my specifying "-v" more than once.
20
21# If this is run on non-Linux platforms, just return nothing and indicate
22# success. This allows us to "kind of emulate" a Linux build from other
23# platforms.
24if sys.platform.find("linux") == -1:
25  print "[[],[],[]]"
26  sys.exit(0)
27
28parser = OptionParser()
29parser.add_option('-v', action='append', dest='strip_out', type='string')
30(options, args) = parser.parse_args()
31
32# Make a list of regular expressions to strip out.
33strip_out = []
34if options.strip_out != None:
35  for regexp in options.strip_out:
36    strip_out.append(re.compile(regexp))
37
38try:
39  flag_string = subprocess.check_output(["pkg-config", "--cflags", "--libs"] +
40      args)
41  # For now just split on spaces to get the args out. This will break if
42  # pkgconfig returns quoted things with spaces in them, but that doesn't seem
43  # to happen in practice.
44  all_flags = flag_string.strip().split(' ')
45except:
46  print "Could not run pkg-config."
47  sys.exit(1)
48
49includes = []
50cflags = []
51libs = []
52lib_dirs = []
53
54def MatchesAnyRegexp(flag, list_of_regexps):
55  for regexp in list_of_regexps:
56    if regexp.search(flag) != None:
57      return True
58  return False
59
60for flag in all_flags[:]:
61  if len(flag) == 0 or MatchesAnyRegexp(flag, strip_out):
62    continue;
63
64  if flag[:2] == '-l':
65    libs.append(flag[2:])
66  if flag[:2] == '-L':
67    lib_dirs.append(flag[2:])
68  elif flag[:2] == '-I':
69    includes.append(flag[2:])
70  else:
71    cflags.append(flag)
72
73# Output a GN array, the first one is the cflags, the second are the libs. The
74# JSON formatter prints GN compatible lists when everything is a list of
75# strings.
76print json.dumps([includes, cflags, libs, lib_dirs])
77