Switched remaining GPU test bots to be pure testers, triggered by builders.

scripts/master/recipe_master_helper.py

Index: scripts/master/recipe_master_helper.py
diff --git a/scripts/master/recipe_master_helper.py b/scripts/master/recipe_master_helper.py
new file mode 100644
index 0000000000000000000000000000000000000000..0a436530ea4877f72cd66f3f867b730727094a7d
--- /dev/null
+++ b/scripts/master/recipe_master_helper.py
@@ -0,0 +1,112 @@
+# Copyright (c) 2013 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 buildbot.scheduler import Scheduler
+from buildbot.scheduler import Triggerable
+
+import collections
+
+# This file contains useful functions for masters whose slaves run recipes.
+
+def AddSchedulersAndTriggers(buildmaster_config=None,
+                             slave_list=None,
+                             scheduler_name=None,
+                             branch=None):
+  """Adds schedulers and triggers to the BuildmasterConfig based on
+  the contents of slaves.cfg, passed in as a slave_list.
+
+  This function relies on certain structure in the slaves.cfg, in
+  particular the custom 'triggered_by' property, which is not yet
+  commonly used to define triggers.
+
+  Returns a dictionary mapping builder name, for those builders which
+  invoke triggers, to the (synthesized) name of the trigger.
+
+  TODO(kbr): this function does not yet support builders with
+  multiple slaves behind them, but could be updated to do so.
+
+  Throws an Exception if a non-existent builder is mentioned in
+  another builder's 'triggered_by' property.
+
+  Arguments:
+
+    buildmaster_config: a BuildmasterConfig into which the
+      'schedulers' property will be defined.
+
+    slave_list: a SlavesList constructed from slaves.cfg.
+
+    scheduler_name: the name of the Scheduler for the polling (not
+      triggered) builders.
+  """
+  c = buildmaster_config
+  polling_builders = []
+  # Maps the parent builder to a set of the names of the builders it triggers.
+  trigger_map = collections.defaultdict(list)
+  # Maps the name of the parent builder to the (synthesized) name of its
+  # trigger, wrapped in a list.
+  trigger_name_map = {}
+  next_group_id = 0
+  for slave in slave_list.slaves:
+    builder = slave['builder']
+    parent_builder = slave.get('triggered_by')
+    if parent_builder is not None:
+      if slave_list.GetSlave(builder=parent_builder) is None:
+        raise Exception('Could not find parent builder %s for builder %s' %
+                        (parent_builder, builder))
+      trigger_map[parent_builder].append(builder)
+      if parent_builder not in trigger_name_map:
+        trigger_name_map[parent_builder] = 'trigger_group_%d' % next_group_id
+        next_group_id += 1
+    else:
+      polling_builders.append(builder)
+  s_gpu = Scheduler(name=scheduler_name,
+                    branch=branch,
+                    treeStableTimer=60,
+                    builderNames=polling_builders)
+  c['schedulers'] = [s_gpu]
+  for name, builders in trigger_map.iteritems():
+    c['schedulers'].append(Triggerable(name=trigger_name_map[name],
+                                       builderNames=builders))
+  return trigger_name_map
+
+def AddRecipeBasedBuilders(buildmaster_config=None,
+                           slave_list=None,
+                           annotator=None,
+                           trigger_name_map=None):
+  """Writes builders which use recipes to the BuildmasterConfig's
+  'builders' list, using the AnnotatorFactory's BaseFactory.
+  Specifies some common factory properties for these builders.
+
+  Arguments:
+
+    buildmaster_config: a BuildmasterConfig into which the
+      'builders' property will be defined.
+
+    slave_list: a SlavesList constructed from slaves.cfg.
+
+    annotator: an AnnotatorFactory instance.
+
+    trigger_name_map: the trigger name map returned by
+      AddSchedulersAndTriggers, above.
+  """
+  builders = []
+  for slave in slave_list.slaves:
+    if 'recipe' in slave:
+      factory_properties = {
+        'test_results_server': 'test-results.appspot.com',
+        'generate_gtest_json': True,
+        'build_config': slave['build_config']
+      }
+      if 'perf_id' in slave:
+        factory_properties['show_perf_results'] = True
+        factory_properties['perf_id'] = slave['perf_id']
+      name = slave['builder']
+      builders.append({
+        'name': name,
+        'factory': annotator.BaseFactory(
+          slave['recipe'],
+          factory_properties,
+          [trigger_name_map[name]] if name in trigger_name_map else None)
+        })
+  buildmaster_config['builders'] = builders