Reland "Skia: Maintain a checkout on swarming (compile) bots"

scripts/slave/recipe_modules/skia_swarming/api.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.
 
 
 from recipe_engine import recipe_api
 import shlex
 
 
 DEFAULT_TASK_EXPIRATION = 4*60*60
@@ skipping 143 matching lines @@
       include_hashes: list of str. Hashes of the new includes.
     Returns:
       Updated hash of the .isolated file.
     """
     isolated_file = self.isolated_file_path(task_name)
     self.m.python.inline('add_isolated_input', program="""
       import json
       import sys
       with open(sys.argv[1]) as f:
         isolated = json.load(f)
+      if not isolated.get('includes'):
+        isolated['includes'] = []
       for h in sys.argv[2:]:
         isolated['includes'].append(h)
       with open(sys.argv[1], 'w') as f:
         json.dump(isolated, f, sort_keys=True)
     """, args=[isolated_file] + include_hashes)
     isolateserver = self.m.swarming_client.path.join('isolateserver.py')
     r = self.m.python('upload new .isolated file for %s' % task_name,
                       script=isolateserver,
                       args=['archive', '--isolate-server',
                             self.m.isolate.isolate_server, isolated_file],
@@ skipping 55 matching lines @@
   def collect_swarming_task_isolate_hash(self, swarming_task):
     """Wait for the given swarming task to finish and return its output hash.
 
     Args:
       swarming_task: An instance of swarming.SwarmingTask.
     Returns:
       the hash of the isolate output of the task.
     """
     res = self.collect_swarming_task(swarming_task)
     return res.json.output['shards'][0]['isolated_out']['isolated']