Update bisect_lib with the changes committed in the infra/build repo.

experimental/bisect_lib/fetch_revision_info.py

+#!/usr/bin/python
+# Copyright 2015 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.
+
+"""Gets information about one commit from gitiles.
+
+Example usage:
+  ./fetch_revision_info.py 343b531d31 chromium
+  ./fetch_revision_info.py 17b4e7450d v8
+"""
+
+import argparse
+import json
+import urllib2
+
+import depot_map  # pylint: disable=relative-import
+
+_GITILES_PADDING = ')]}\'\n'
+_URL_TEMPLATE = 'https://chromium.googlesource.com/%s/+/%s?format=json'
+
+def FetchRevisionInfo(commit_hash, depot_name):
+  """Gets information about a chromium revision."""
+  path = depot_map.DEPOT_PATH_MAP[depot_name]
+  url = _URL_TEMPLATE % (path, commit_hash)
+  response = urllib2.urlopen(url).read()
+  response_json = response[len(_GITILES_PADDING):]
+  response_dict = json.loads(response_json)
+  message = response_dict['message'].splitlines()
+  subject = message[0]
+  body = '\n'.join(message[1:])
+  result = {
+      'author': response_dict['author']['name'],
+      'email': response_dict['author']['email'],
+      'subject': subject,
+      'body': body,
+      'date': response_dict['committer']['time'],
+  }
+  return result
+
+
+def Main():
+  parser = argparse.ArgumentParser()
+  parser.add_argument('commit_hash')
+  parser.add_argument('depot', choices=list(depot_map.DEPOT_PATH_MAP))
+  args = parser.parse_args()
+  revision_info = FetchRevisionInfo(args.commit_hash, args.depot)
+  print json.dumps(revision_info)
+
+
+if __name__ == '__main__':
+  Main()