Bug 1402457 - Actually schedule periodic file updates. r=dustin

MozReview-Commit-ID: BJsNs86kNJu

.cron.yml

@@ -97,3 +97,18 @@ jobs:
           by-project:
               mozilla-central: [{hour: 10, minute: 0}]
               # No default
+
+    - name: periodic-update
+      job:
+          type: decision-task
+          treeherder-symbol: Nfile
+          target-tasks-method: nightly_file_update
+      run-on-projects:
+          - mozilla-central
+      when:
+          by-project:
+              # No default branch
+              mozilla-central:
+                  # Buildbot start time is 10:02am UTC, until we are able to
+                  # disable buildbot scheduling, use +12h
+                  - {hour: 22, minute: 0}

taskcluster/taskgraph/target_tasks.py

@@ -388,3 +388,13 @@ def filter(task):
         platform = task.attributes.get('build_platform', '')
         return platform.endswith('-dmd')
     return [l for l, t in full_task_graph.tasks.iteritems() if filter(t)]
+
+
+@_target_task('nightly_file_update')
+def target_tasks_file_update(full_task_graph, parameters):
+    """Select the set of tasks required to perform nightly in-tree file updates
+    """
+    def filter(task):
+        # For now any task in the repo-update kind is ok
+        return task.kind not in ['repo-update']
+    return [l for l, t in full_task_graph.tasks.iteritems() if filter(t)]

taskcluster/taskgraph/transforms/job/buildbot.py

@@ -34,8 +34,6 @@ def mozharness_on_buildbot_bridge(config, job, taskdesc):
     branch = config.params['project']
     product = run['product']
 
-    worker.pop('env', None)
-
     buildername = run['buildername'].format(branch=branch)
 
     worker.update({