1 files changed, 46 insertions, 0 deletions
diff --git a/infra/bots/recipe_modules/swarming/resources/noop_merge.py b/infra/bots/recipe_modules/swarming/resources/noop_merge.py
new file mode 100755
index 0000000000..740e0d3b32
--- /dev/null
+++ b/infra/bots/recipe_modules/swarming/resources/noop_merge.py
@@ -0,0 +1,46 @@
+#!/usr/bin/env python
+# Copyright 2017 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.
+
+import argparse
+import json
+import shutil
+import sys
+
+
+def noop_merge(output_json, jsons_to_merge):
+  """Use the first supplied JSON as the output JSON.
+
+  Primarily intended for unsharded tasks.
+
+  Args:
+    output_json: A path to a JSON file to which the results should be written.
+    jsons_to_merge: A list of paths to JSON files.
+  """
+  if len(jsons_to_merge) > 1:
+    print >> sys.stderr, (
+        'Multiple JSONs provided: %s' % ','.join(jsons_to_merge))
+    return 1
+  if jsons_to_merge:
+    shutil.copyfile(jsons_to_merge[0], output_json)
+  else:
+    with open(output_json, 'w') as f:
+      json.dump({}, f)
+  return 0
+
+
+def main(raw_args):
+  parser = argparse.ArgumentParser()
+  parser.add_argument('--build-properties', help=argparse.SUPPRESS)
+  parser.add_argument('--summary-json', help=argparse.SUPPRESS)
+  parser.add_argument('-o', '--output-json', required=True)
+  parser.add_argument('jsons_to_merge', nargs='*')
+
+  args = parser.parse_args(raw_args)
+
+  return noop_merge(args.output_json, args.jsons_to_merge)
+
+
+if __name__ == '__main__':
+  sys.exit(main(sys.argv[1:]))