diff -r 000000000000 -r 6474c204b198 content/canvas/test/webgl-conformance/writemanifest.py
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/content/canvas/test/webgl-conformance/writemanifest.py	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,37 @@
+#!/usr/bin/env python
+#
+# 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/.
+#
+# Write a Mochitest manifest for WebGL conformance test files.
+
+import os
+from itertools import chain
+
+CONFORMANCE_DIRS = [
+    "conformance",
+    "resources",
+]
+
+def listfiles(dir, rel):
+    """List all files in dir recursively, yielding paths
+    relative to rel.
+    """
+    for root, folders, files in os.walk(dir):
+        for f in files:
+            yield os.path.relpath(os.path.join(root, f), rel)
+
+def writemanifest():
+    script_dir = os.path.dirname(__file__)
+    list_dirs = [os.path.join(script_dir, d) for d in CONFORMANCE_DIRS]
+    with open(os.path.join(script_dir, 'mochitest-conformance-files.ini'), 'w') as f:
+        f.write("""[DEFAULT]
+support-files =
+  %s
+""" % "\n  ".join(sorted(chain.from_iterable(listfiles(d, script_dir)
+                                             for d in list_dirs))))
+
+if __name__ == '__main__':
+    writemanifest()
+