1# Copyright (C) 2013 Google Inc. All rights reserved.
2#
3# Redistribution and use in source and binary forms, with or without
4# modification, are permitted provided that the following conditions are
5# met:
6#
7#     * Redistributions of source code must retain the above copyright
8# notice, this list of conditions and the following disclaimer.
9#     * Redistributions in binary form must reproduce the above
10# copyright notice, this list of conditions and the following disclaimer
11# in the documentation and/or other materials provided with the
12# distribution.
13#     * Neither the name of Google Inc. nor the names of its
14# contributors may be used to endorse or promote products derived from
15# this software without specific prior written permission.
16#
17# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
18# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
19# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
20# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
21# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
22# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
23# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
24# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
25# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
26# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
27# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
28
29import os.path
30import shlex
31import shutil
32import optparse
33
34from in_file import InFile
35
36
37class Writer(object):
38    # Subclasses should override.
39    class_name = None
40    defaults = None
41    valid_values = None
42    default_parameters = None
43
44    def __init__(self, in_files):
45        if isinstance(in_files, basestring):
46            in_files = [in_files]
47        if in_files:
48            self.in_file = InFile.load_from_files(in_files, self.defaults, self.valid_values, self.default_parameters)
49        else:
50            self.in_file = None
51        self._outputs = {}  # file_name -> generator
52
53    def wrap_with_condition(self, string, condition):
54        if not condition:
55            return string
56        return "#if ENABLE(%(condition)s)\n%(string)s\n#endif" % { 'condition' : condition, 'string' : string }
57
58    def _forcibly_create_text_file_at_path_with_contents(self, file_path, contents):
59        # FIXME: This method can be made less force-full anytime after 6/1/2013.
60        # A gyp error was briefly checked into the tree, causing
61        # a directory to have been generated in place of one of
62        # our output files.  Clean up after that error so that
63        # all users don't need to clobber their output directories.
64        shutil.rmtree(file_path, ignore_errors=True)
65        # The build system should ensure our output directory exists, but just in case.
66        directory = os.path.dirname(file_path)
67        if not os.path.exists(directory):
68            os.makedirs(directory)
69
70        with open(file_path, "w") as file_to_write:
71            file_to_write.write(contents)
72
73    def _write_file(self, output_dir, contents, file_name):
74        path = os.path.join(output_dir, file_name)
75        self._forcibly_create_text_file_at_path_with_contents(path, contents)
76
77    def write_files(self, output_dir):
78        for file_name, generator in self._outputs.items():
79            self._write_file(output_dir, generator(), file_name)
80
81    def set_gperf_path(self, gperf_path):
82        self.gperf_path = gperf_path
83
84
85class Maker(object):
86    def __init__(self, writer_class):
87        self._writer_class = writer_class
88
89    def main(self, argv):
90        script_name = os.path.basename(argv[0])
91        args = argv[1:]
92        if len(args) < 1:
93            print "USAGE: %s INPUT_FILES" % script_name
94            exit(1)
95
96        parser = optparse.OptionParser()
97        parser.add_option("--gperf", default="gperf")
98        parser.add_option("--output_dir", default=os.getcwd())
99        options, args = parser.parse_args()
100
101        writer = self._writer_class(args)
102        writer.set_gperf_path(options.gperf)
103        writer.write_files(options.output_dir)
104