Bug 1412690 - fennec per task notifications. r=garbas

This patch adds per-task pulse notifications, as well as general support
to handle them.

Longer term we may move away from pulse-notifications, but this allows
us to proceed with pulse-notifications until that time.

MozReview-Commit-ID: 1uB4X682yLT

taskcluster/taskgraph/transforms/task.py

@@ -46,6 +46,13 @@ taskref_or_string = Any(
     basestring,
     {Required('task-reference'): basestring})
 
+notification_schema = Schema({
+    Required("subject"): basestring,
+    Required("message"): basestring,
+    Required("ids"): [basestring],
+
+})
+
 # A task description is a general description of a TaskCluster task
 task_description_schema = Schema({
     # the label for this task
@@ -382,6 +389,11 @@ task_description_schema = Schema({
         },
         Optional('scopes'): [basestring],
         Optional('routes'): [basestring],
+        Optional('notifications'): {
+            Optional('task-completed'): notification_schema,
+            Optional('task-failed'): notification_schema,
+            Optional('task-exception'): notification_schema,
+        },
     }, {
         Required('implementation'): 'native-engine',
         Required('os'): Any('macosx', 'linux'),
@@ -1011,6 +1023,16 @@ def build_buildbot_bridge_payload(config, task, task_def):
     task_def['scopes'].extend(worker.get('scopes', []))
     task_def['routes'].extend(worker.get('routes', []))
 
+    notifications = worker.get('notifications')
+    if notifications:
+        task_def.setdefault('extra', {}).setdefault('notifications', {})
+        for k, v in notifications.items():
+            task_def['extra']['notifications'][k] = {
+                'subject': v['subject'].format(task=task_def),
+                'message': v['message'].format(task=task_def),
+                'ids': v['ids'],
+            }
+
 
 transforms = TransformSequence()