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 # This Source Code Form is subject to the terms of the Mozilla Public

 # License, v. 2.0. If a copy of the MPL was not distributed with this

 # file, You can obtain one at http://mozilla.org/MPL/2.0/.

 # This file takes the .mk files from an upstream opus repo and generates the

 # sources.mozbuild file. It is invoked as part of update.sh

 import sys

 import re

 def add_value(values, text):

     text = text.replace('\\', '')

     text = text.strip()

     if text:

         values.append(text)

 def write_values(output, values):

     for value in sorted(values, key=lambda x: x.lower()):

         output.write("    '%s',\n" % value)

     output.write(']\n\n')

 def generate_sources_mozbuild(path):

     makefiles = [

         'celt_sources.mk',

         'opus_sources.mk',

         'silk_sources.mk',

     ]

     var_definition = re.compile('([A-Z_]*) = (.*)')

     with open('sources.mozbuild', 'w') as output:

         output.write('# THIS FILE WAS AUTOMATICALLY GENERATED BY %s. DO NOT EDIT.\n' % sys.argv[0])

         for makefile in makefiles:

             values = []

             definition_started = False

             with open('%s/%s' % (path, makefile), 'r') as mk:

                 for line in mk:

                     line = line.rstrip()

                     result = var_definition.match(line)

                     if result:

                         if definition_started:

                             write_values(output, values)

                             values = []

                         definition_started = True

                         # Some variable definitions have the first entry on the

                         # first line. Eg:

                         #

                         # CELT_SOURCES = celt/bands.c

                         #

                         # So we treat the first group as the variable name and

                         # the second group as a potential value.

                         #

                         # Note that we write the variable name in lower case (so

                         # "CELT_SOURCES" in the .mk file becomes "celt_sources"

                         # in the .mozbuild file) because moz.build reserves

                         # upper-case variable names for build system outputs.

                         output.write('%s = [\n' % result.group(1).lower())

                         add_value(values, result.group(2))

                     else:

                         add_value(values, line)

             write_values(output, values)

 if __name__ == '__main__':

     if len(sys.argv) != 2:

         print "Usage: %s /path/to/opus" % (sys.argv[0])

         sys.exit(1)

     generate_sources_mozbuild(sys.argv[1])