1 files changed, 42 insertions, 0 deletions
diff --git a/python/mozbuild/mozbuild/action/l10n_merge.py b/python/mozbuild/mozbuild/action/l10n_merge.py
new file mode 100644
index 0000000000..1a04d60107
--- /dev/null
+++ b/python/mozbuild/mozbuild/action/l10n_merge.py
@@ -0,0 +1,42 @@
+# 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/.
+
+import argparse
+import os
+import shutil
+import sys
+
+from mozbuild.util import ensureParentDir
+
+
+def main(argv):
+    parser = argparse.ArgumentParser(description="Merge l10n files.")
+    parser.add_argument("--output", help="Path to write merged output")
+    parser.add_argument("--ref-file", help="Path to reference file (en-US)")
+    parser.add_argument("--l10n-file", help="Path to locale file")
+
+    args = parser.parse_args(argv)
+
+    from compare_locales.compare import ContentComparer, Observer
+    from compare_locales.paths import File
+
+    cc = ContentComparer([Observer()])
+    cc.compare(
+        File(args.ref_file, args.ref_file, ""),
+        File(args.l10n_file, args.l10n_file, ""),
+        args.output,
+    )
+
+    ensureParentDir(args.output)
+    if not os.path.exists(args.output):
+        src = args.l10n_file
+        if not os.path.exists(args.l10n_file):
+            src = args.ref_file
+        shutil.copy(src, args.output)
+
+    return 0
+
+
+if __name__ == "__main__":
+    main(sys.argv[1:])