Add a command-line option about status email in the layout test analyzer.

media/tools/layout_tests/layouttest_analyzer.py

 #!/usr/bin/python
 # Copyright (c) 2011 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.
 
 """Main functions for the Layout Test Analyzer module."""
 
 import csv
 from datetime import datetime
 import optparse
@@ skipping 66 matching lines @@
                              help=('Name of result directory location '
                                    '(default to %default)'),
                              default=DEFAULT_RESULT_DIR)
     option_parser.add_option('-b', '--email-appended-text-file-location',
                              dest='email_appended_text_file_location',
                              help=('File location of the email appended text. '
                                    'The text is appended in the status email. '
                                    '(default to %default and no text is '
                                    'appended in that case.)'),
                              default=None)
+    option_parser.add_option('-c', '--email-only-change-mode',
+                             dest='email_only_change_mode',
+                             help=('With this mode, email is sent out '
+                                   'only when there is a change in the '
+                                   'analyzer result compared to the previous '
+                                   'result (off by default)'),
+                             action='store_true', default=False)
     return option_parser.parse_args()[0]
 
 
 def main():
   """A main function for the analyzer."""
   options = parse_option()
   start_time = datetime.now()
 
   # Do the main analysis.
   if not options.debug:
@@ skipping 35 matching lines @@
     else:
       appended_text_to_email = ''.join(file_object.readlines())
       file_object.close()
 
 
   layouttest_analyzer_helpers.SendStatusEmail(prev_time, analyzer_result_map,
                                               prev_analyzer_result_map,
                                               anno_map,
                                               options.receiver_email_address,
                                               options.test_group_name,
-                                              appended_text_to_email)
+                                              appended_text_to_email,
+                                              options.email_only_change_mode)
   if not options.debug:
     # Save the current result.
     date = start_time.strftime('%Y-%m-%d-%H')
     file_path = os.path.join(options.result_directory_location, date)
     analyzer_result_map.Save(file_path)
 
   # Trend graph update (if specified in the command-line argument).
   trend_graph = TrendGraph(options.trend_graph_location)
   datetime_string = start_time.strftime('%Y,%m,%d,%H,%M,%S')
   # TODO(imasaki): add correct title and text instead of 'undefined'.
   data_map = (
       {'whole': (str(len(analyzer_result_map.result_map['whole'].keys())),
                  'undefined', 'undefined'),
        'skip': (str(len(analyzer_result_map.result_map['skip'].keys())),
                 'undefined', 'undefined'),
        'nonskip': (str(len(analyzer_result_map.result_map['nonskip'].keys())),
                    'undefined', 'undefined'),
        'passingrate': (str(analyzer_result_map.GetPassingRate()),
                        'undefined', 'undefined')})
   trend_graph.Update(datetime_string, data_map)
 
 
 if '__main__' == __name__:
   main()