1 files changed, 49 insertions, 0 deletions
diff --git a/third_party/libwebrtc/build/config/fuchsia/build_cmx_from_fragment.py b/third_party/libwebrtc/build/config/fuchsia/build_cmx_from_fragment.py
new file mode 100644
index 0000000000..ac7e34988d
--- /dev/null
+++ b/third_party/libwebrtc/build/config/fuchsia/build_cmx_from_fragment.py
@@ -0,0 +1,49 @@
+# Copyright 2020 The Chromium Authors. All rights reserved.
+# Use of this source code is governed by a BSD-style license that can be
+# found in the LICENSE file.
+"""Creates a complete CMX (v1) component manifest, from a program name and
+   manifest fragment file."""
+
+import argparse
+import json
+import sys
+
+
+def BuildCmxFromFragment(output_file, fragment_file, program_binary):
+  """Reads a CMX fragment specifying e.g. features & sandbox, and a program
+     binary's filename, and writes out the full CMX.
+
+     output_file: Build-relative filename at which to write the full CMX.
+     fragment_file: Build-relative filename of the CMX fragment to read from.
+     program_binary: Package-relative filename of the program binary.
+  """
+
+  with open(output_file, 'w') as component_manifest_file:
+    component_manifest = json.load(open(fragment_file, 'r'))
+    component_manifest.update({
+        'program': {
+            'binary': program_binary
+        },
+    })
+    json.dump(component_manifest, component_manifest_file)
+
+
+def main():
+  parser = argparse.ArgumentParser()
+  parser.add_argument(
+      '--cmx-fragment',
+      required=True,
+      help='Path to the CMX fragment to read from')
+  parser.add_argument(
+      '--cmx', required=True, help='Path to write the complete CMX file to')
+  parser.add_argument(
+      '--program',
+      required=True,
+      help='Package-relative path to the program binary')
+  args = parser.parse_args()
+
+  return BuildCmxFromFragment(args.cmx, args.cmx_fragment, args.program)
+
+
+if __name__ == '__main__':
+  sys.exit(main())