1 files changed, 70 insertions, 0 deletions
diff --git a/media/libopus/gen-sources.py b/media/libopus/gen-sources.py
new file mode 100644
index 000000000..00c180940
--- /dev/null
+++ b/media/libopus/gen-sources.py
@@ -0,0 +1,70 @@
+# 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-Z0-9_]*) = (.*)')
+    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])