1 files changed, 49 insertions, 0 deletions
diff --git a/python/mozbuild/mozbuild/action/unify_symbols.py b/python/mozbuild/mozbuild/action/unify_symbols.py
new file mode 100644
index 0000000000..4e96a010b2
--- /dev/null
+++ b/python/mozbuild/mozbuild/action/unify_symbols.py
@@ -0,0 +1,49 @@
+# 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
+
+from mozpack.copier import FileCopier
+from mozpack.errors import errors
+from mozpack.files import FileFinder
+from mozpack.unify import UnifiedFinder
+
+
+class UnifiedSymbolsFinder(UnifiedFinder):
+    def unify_file(self, path, file1, file2):
+        # We expect none of the files to overlap.
+        if not file2:
+            return file1
+        if not file1:
+            return file2
+        errors.error(
+            "{} is in both {} and {}".format(
+                path, self._finder1.base, self._finder2.base
+            )
+        )
+
+
+def main():
+    parser = argparse.ArgumentParser(
+        description="Merge two crashreporter symbols directories."
+    )
+    parser.add_argument("dir1", help="Directory")
+    parser.add_argument("dir2", help="Directory to merge")
+
+    options = parser.parse_args()
+
+    dir1_finder = FileFinder(options.dir1)
+    dir2_finder = FileFinder(options.dir2)
+    finder = UnifiedSymbolsFinder(dir1_finder, dir2_finder)
+
+    copier = FileCopier()
+    with errors.accumulate():
+        for p, f in finder:
+            copier.add(p, f)
+
+    copier.copy(options.dir1, skip_if_older=False)
+
+
+if __name__ == "__main__":
+    main()