[Findit] Strip platform from step_name before triggering try job.

appengine/findit/waterfall/trigger_swarming_task_pipeline.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 copy
 from datetime import datetime
 import logging
 import time
 
 from google.appengine.ext import ndb
@@ skipping 36 matching lines @@
   ]
   new_request.extra_args.append('--gtest_filter=%s' % ':'.join(tests))
 
   # Remove the env setting for sharding.
   sharding_settings = ['GTEST_SHARD_INDEX', 'GTEST_TOTAL_SHARDS']
   new_request.env = [
       e for e in new_request.env if e['key'] not in sharding_settings
   ]
 
   # Reset tags for searching and monitoring.
+  ref_name = swarming_util.GetTagValue(new_request.tags, 'name') or step_name

[stgao, 2016/03/11 06:42:59]

We'd better not default to step name here, since step name always includes the
platform name now.

   new_request.tags = []
   new_request.tags.append('purpose:deflake')
   new_request.tags.append('ref_master:%s' % master_name)
   new_request.tags.append('ref_buildername:%s' % builder_name)
   new_request.tags.append('ref_buildnumber:%s' % build_number)
   new_request.tags.append('ref_stepname:%s' % step_name)
   new_request.tags.append('ref_task_id:%s' % ref_task_id)
+  new_request.tags.append('ref_name:%s' % ref_name)
 
   return new_request
 
 
 @ndb.transactional
 def _NeedANewSwarmingTask(master_name, builder_name, build_number, step_name):
   swarming_task = WfSwarmingTask.Get(
       master_name, builder_name, build_number, step_name)
 
   if not swarming_task:
@@ skipping 79 matching lines @@
     # Save the task id.
     swarming_task = WfSwarmingTask.Get(
         master_name, builder_name, build_number, step_name)
     swarming_task.task_id = task_id
     swarming_task.parameters['tests'] = tests
     swarming_task.parameters['iterations_to_rerun'] = iterations_to_rerun
     swarming_task.put()
 
     logging.info('A Swarming task was triggered:%s', task_id)
     return task_id