1 files changed, 32 insertions, 0 deletions
diff --git a/browser/base/gen_aboutneterror_codes.py b/browser/base/gen_aboutneterror_codes.py
new file mode 100644
index 0000000000..a333d206fa
--- /dev/null
+++ b/browser/base/gen_aboutneterror_codes.py
@@ -0,0 +1,32 @@
+#!/usr/bin/env python3
+# 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/.
+
+from __future__ import absolute_import
+
+from fluent.syntax import parse
+from fluent.syntax.ast import Message
+import sys
+
+
+def find_error_ids(filename, known_strings):
+    with open(filename, "r", encoding="utf-8") as f:
+        known_strings += [
+            m.id.name for m in parse(f.read()).body if isinstance(m, Message)
+        ]
+
+
+def main(output, *filenames):
+    known_strings = []
+    for filename in filenames:
+        find_error_ids(filename, known_strings)
+
+    output.write("const KNOWN_ERROR_MESSAGE_IDS = new Set([\n")
+    for known_string in known_strings:
+        output.write('  "{}",\n'.format(known_string))
+    output.write("]);\n")
+
+
+if __name__ == "__main__":
+    sys.exit(main(sys.stdout, *sys.argv[1:]))