[Findit] Add skeleton code for delta test script.

appengine/findit/util_scripts/crash_queries/delta_test/run-azalea.py

+# Copyright 2016 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 logging
+import json
+
+import dev_appserver
+dev_appserver.fix_sys_path()
+
+from crash.findit_for_chromecrash import Culprit
+from crash_queries.delta_test import delta_util
+
+
+# TODO(katesonia): Replace the current testing function with real find culprit
+# function.
+# Unused argument - pylint: disable=W
+def GetCulprits(crashes, client, verbose=False):

[stgao, 2016/10/20 01:40:20]

What's the verbose for? If not used, could we remove for now?

[Sharu Jiang, 2016/10/20 22:39:07]

Done.

+  culprits = {}
+  for crash in crashes:
+    culprit = Culprit('proj1', 'comp', [], ['rev1', 'rev2'])
+    culprits[crash['id']] = culprit
+
+  return culprits
+
+
+def RunAzalea():
+  """Runs delta testing between 2 different Findit versions."""
+  argparser = argparse.ArgumentParser(
+      description='Run azalea on a batch of crashes.')
+  argparser.add_argument('result_path', help='Path to store results')
+  argparser.add_argument(
+      '--verbose',
+      '-v',
+      action='store_true',
+      default=False,
+      help='Print findit results.')
+  argparser.add_argument(
+      '--client',
+      '-c',
+      default='fracas',
+      help=('Possible values are: fracas, cracas, clusterfuzz. Right now, only '
+            'fracas is supported.'))
+  args = argparser.parse_args()
+
+  crashes = json.loads(raw_input())
+  culprits = GetCulprits(crashes, args.client, args.verbose)
+
+  delta_util.FlushResult(culprits, args.result_path)
+
+
+if __name__ == '__main__':
+  logging.basicConfig(level=logging.DEBUG)
+  RunAzalea()