1#!/usr/bin/env python
2#
3# Copyright (C) 2010 Google Inc. All rights reserved.
4#
5# Redistribution and use in source and binary forms, with or without
6# modification, are permitted provided that the following conditions are
7# met:
8#
9#         * Redistributions of source code must retain the above copyright
10# notice, this list of conditions and the following disclaimer.
11#         * Redistributions in binary form must reproduce the above
12# copyright notice, this list of conditions and the following disclaimer
13# in the documentation and/or other materials provided with the
14# distribution.
15#         * Neither the name of Google Inc. nor the names of its
16# contributors may be used to endorse or promote products derived from
17# this software without specific prior written permission.
18#
19# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
20# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
21# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
22# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
23# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
24# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
25# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
26# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
27# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
28# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
29# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
30#
31
32# This script concatenates CSS files in the order specified
33# as @import url(...) in the input stylesheet.
34
35from cStringIO import StringIO
36import os.path
37import re
38import sys
39
40
41import_regex = re.compile(r"@import\s*\url\(\s*\"([^\"]+)\"\s*\)")
42
43
44def extract_css_files(stylesheet_name):
45    result = []
46    line_number = 1
47    with open(stylesheet_name, 'r') as input:
48        for line in input.readlines():
49            match = re.search(import_regex, line)
50            if match:
51                result.append((match.group(1), line_number))
52            line_number += 1
53    return result
54
55
56def main(argv):
57
58    if len(argv) != 3:
59        print('usage: %s input.css output.css' % argv[0])
60        return 1
61
62    input_stylesheet_name = argv[1]
63    output_file_name = argv[2]
64    input_directory = os.path.dirname(input_stylesheet_name)
65    output = StringIO()
66
67    for input_file_name, line_number in extract_css_files(input_stylesheet_name):
68        full_path = os.path.join(input_directory, input_file_name)
69        if not os.path.isfile(full_path):
70            raise Exception('File %s referenced in %s:%d was not found, '
71                            'check source tree for consistency' %
72                            (input_file_name, input_stylesheet_name, line_number))
73        output.write('/* %s */\n\n' % input_file_name)
74        with open(full_path, 'r') as input_file:
75            output.write(input_file.read())
76            output.write('\n')
77
78    if os.path.exists(output_file_name):
79        os.remove(output_file_name);
80    with open(output_file_name, 'w') as output_file:
81        output_file.write(output.getvalue())
82    output.close()
83
84    # Touch output file directory to make sure that Xcode will copy
85    # modified resource files.
86    if sys.platform == 'darwin':
87        output_dir_name = os.path.dirname(output_file_name)
88        os.utime(output_dir_name, None)
89
90
91if __name__ == '__main__':
92    sys.exit(main(sys.argv))
93