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 in place JS files in the order specified
33# using <script> tags in a given 'order.html' file.
34
35from HTMLParser import HTMLParser
36from cStringIO import StringIO
37
38import jsmin
39import os.path
40import sys
41
42
43class OrderedJSFilesExtractor(HTMLParser):
44
45    def __init__(self, order_html_name):
46        HTMLParser.__init__(self)
47        self.ordered_js_files = []
48        order_html = open(order_html_name, 'r')
49        self.feed(order_html.read())
50
51    def handle_starttag(self, tag, attrs):
52        if tag == 'script':
53            attrs_dict = dict(attrs)
54            if ('type' in attrs_dict and attrs_dict['type'] == 'text/javascript' and 'src' in attrs_dict):
55                self.ordered_js_files.append(attrs_dict['src'])
56
57
58class PathExpander:
59
60    def __init__(self, paths):
61        self.paths = paths
62
63    def expand(self, filename):
64        last_path = None
65        expanded_name = None
66        for path in self.paths:
67            fname = "%s/%s" % (path, filename)
68            if (os.access(fname, os.F_OK)):
69                if (last_path != None):
70                    raise Exception('Ambiguous file %s: found in %s and %s' %
71                                    (filename, last_path, path))
72                expanded_name = fname
73                last_path = path
74        return expanded_name
75
76
77def main(argv):
78
79    if len(argv) < 3:
80        print('usage: %s order.html input_source_dir_1 input_source_dir_2 ... '
81              'output_file' % argv[0])
82        return 1
83
84    output_file_name = argv.pop()
85    input_order_file_name = argv[1]
86    extractor = OrderedJSFilesExtractor(input_order_file_name)
87    extractor.ordered_js_files.append('DevTools.js')
88    extractor.ordered_js_files.append('Tests.js')
89
90    expander = PathExpander(argv[2:])
91    output = StringIO()
92
93    for input_file_name in extractor.ordered_js_files:
94        full_path = expander.expand(input_file_name)
95        if (full_path is None):
96            raise Exception('File %s referenced in %s not found on any source paths, '
97                            'check source tree for consistency' %
98                            (input_file_name, input_order_file_name))
99        output.write('/* %s */\n\n' % input_file_name)
100        input_file = open(full_path, 'r')
101        output.write(input_file.read())
102        output.write('\n')
103        input_file.close()
104
105    output_file = open(output_file_name, 'w')
106    output_file.write(jsmin.jsmin(output.getvalue()))
107    output_file.close()
108    output.close()
109
110    # Touch output file directory to make sure that Xcode will copy
111    # modified resource files.
112    if sys.platform == 'darwin':
113        output_dir_name = os.path.dirname(output_file_name)
114        os.utime(output_dir_name, None)
115
116if __name__ == '__main__':
117    sys.exit(main(sys.argv))
118