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1#!/usr/bin/env python
2# Copyright (C) 2012 Google Inc. All rights reserved.
3#
4# Redistribution and use in source and binary forms, with or without
5# modification, are permitted provided that the following conditions are
6# met:
7#
8#     * Redistributions of source code must retain the above copyright
9# notice, this list of conditions and the following disclaimer.
10#     * Redistributions in binary form must reproduce the above
11# copyright notice, this list of conditions and the following disclaimer
12# in the documentation and/or other materials provided with the
13# distribution.
14#     * Neither the name of Google Inc. nor the names of its
15# contributors may be used to endorse or promote products derived from
16# this software without specific prior written permission.
17#
18# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
19# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
20# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
21# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
22# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
23# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
24# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
25# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
26# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
27# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
28# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
29
30# Usage: make-file-arrays.py [--condition=condition-string] --out-h=<header-file-name> --out-cpp=<cpp-file-name> <input-file>...
31
32import os.path
33import re
34import sys
35from optparse import OptionParser
36
37rjsmin_path = os.path.abspath(os.path.join(
38        os.path.dirname(__file__),
39        "..",
40        "..",
41        "build",
42        "scripts"))
43sys.path.append(rjsmin_path)
44import rjsmin
45
46
47def make_variable_name_and_read(file_name):
48    result = re.match(r'([\w\d_]+)\.([\w\d_]+)', os.path.basename(file_name))
49    if not result:
50        print 'Invalid input file name:', os.path.basename(file_name)
51        sys.exit(1)
52    variable_name = result.group(1)[0].lower() + result.group(1)[1:] + result.group(2).capitalize()
53    with open(file_name, 'rb') as f:
54        content = f.read()
55    return variable_name, content
56
57
58def strip_whitespace_and_comments(file_name, content):
59    result = re.match(r'.*\.([^.]+)', file_name)
60    if not result:
61        print 'The file name has no extension:', file_name
62        sys.exit(1)
63    extension = result.group(1).lower()
64    multi_line_comment = re.compile(r'/\*.*?\*/', re.MULTILINE | re.DOTALL)
65    # Don't accidentally match URLs (http://...)
66    repeating_space = re.compile(r'[ \t]+', re.MULTILINE)
67    leading_space = re.compile(r'^[ \t]+', re.MULTILINE)
68    trailing_space = re.compile(r'[ \t]+$', re.MULTILINE)
69    empty_line = re.compile(r'\n+')
70    if extension == 'js':
71        content = rjsmin.jsmin(content)
72    elif extension == 'css':
73        content = multi_line_comment.sub('', content)
74        content = repeating_space.sub(' ', content)
75        content = leading_space.sub('', content)
76        content = trailing_space.sub('', content)
77        content = empty_line.sub('\n', content)
78    return content
79
80
81def process_file(file_name):
82    variable_name, content = make_variable_name_and_read(file_name)
83    content = strip_whitespace_and_comments(file_name, content)
84    size = len(content)
85    return variable_name, content
86
87
88def write_header_file(header_file_name, flag, names_and_contents, namespace):
89    with open(header_file_name, 'w') as header_file:
90        if flag:
91            header_file.write('#if ' + flag + '\n')
92        header_file.write('namespace %s {\n' % namespace)
93        for variable_name, content in names_and_contents:
94            size = len(content)
95            header_file.write('extern const char %s[%d];\n' % (variable_name, size))
96        header_file.write('}\n')
97        if flag:
98            header_file.write('#endif\n')
99
100
101def write_cpp_file(cpp_file_name, flag, names_and_contents, header_file_name, namespace):
102    with open(cpp_file_name, 'w') as cpp_file:
103        cpp_file.write('#include "config.h"\n')
104        cpp_file.write('#include "%s"\n' % os.path.basename(header_file_name))
105        if flag:
106            cpp_file.write('#if ' + flag + '\n')
107        cpp_file.write('namespace %s {\n' % namespace)
108        for variable_name, content in names_and_contents:
109            cpp_file.write(cpp_constant_string(variable_name, content))
110        cpp_file.write('}\n')
111        if flag:
112            cpp_file.write('#endif\n')
113
114
115def cpp_constant_string(variable_name, content):
116    output = []
117    size = len(content)
118    output.append('const char %s[%d] = {\n' % (variable_name, size))
119    for index in range(size):
120        char_code = ord(content[index])
121        if char_code < 128:
122            output.append('%d' % char_code)
123        else:
124            output.append(r"'\x%02x'" % char_code)
125        output.append(',' if index != len(content) - 1 else '};\n')
126        if index % 20 == 19:
127            output.append('\n')
128    output.append('\n')
129    return ''.join(output)
130
131
132def main():
133    parser = OptionParser()
134    parser.add_option('--out-h', dest='out_header')
135    parser.add_option('--out-cpp', dest='out_cpp')
136    parser.add_option('--condition', dest='flag')
137    parser.add_option('--namespace', dest='namespace', default='blink')
138    (options, args) = parser.parse_args()
139    if len(args) < 1:
140        parser.error('Need one or more input files')
141    if not options.out_header:
142        parser.error('Need to specify --out-h=filename')
143    if not options.out_cpp:
144        parser.error('Need to specify --out-cpp=filename')
145
146    if options.flag:
147        options.flag = options.flag.replace(' AND ', ' && ')
148        options.flag = options.flag.replace(' OR ', ' || ')
149
150    names_and_contents = [process_file(file_name) for file_name in args]
151
152    if options.out_header:
153        write_header_file(options.out_header, options.flag, names_and_contents, options.namespace)
154    write_cpp_file(options.out_cpp, options.flag, names_and_contents, options.out_header, options.namespace)
155
156
157if __name__ == '__main__':
158    sys.exit(main())
159