Bug 1274311 - tier-2 jobs should have rank 0 in the index; r=dustin

MozReview-Commit-ID: 1CeJ7s6Eay3

taskcluster/ci/legacy/tasks/build.yml

@@ -36,7 +36,7 @@ task:
     build_name: '{{build_name}}'
     build_type: '{{build_type}}'
     index:
-      rank: {{push_epoch}}
+      rank: {{rank}}
     treeherder:
       jobKind: build
       groupSymbol: tc

taskcluster/ci/legacy/tasks/harness_test.yml

@@ -65,7 +65,7 @@ task:
         build: null
         tests: null
     index:
-      rank: {{push_epoch}}
+      rank: {{rank}}
     treeherder:
       jobKind: test
       groupSymbol: tc

taskcluster/ci/legacy/tasks/lint.yml

@@ -37,6 +37,6 @@ task:
     build_name: {{build_name}}
     build_type: {{build_type}}
     index:
-      rank: {{push_epoch}}
+      rank: {{rank}}
     treeherder:
       jobKind: test

taskcluster/ci/legacy/tasks/phone_build.yml

@@ -61,7 +61,7 @@ task:
     build_name: '{{build_name}}'
     build_type: '{{build_type}}'
     index:
-      rank: {{push_epoch}}
+      rank: {{rank}}
     treeherder:
       jobKind: build
       groupSymbol: tc

taskcluster/taskgraph/kind/legacy.py

@@ -355,11 +355,11 @@ class LegacyTask(base.Task):
             'head_ref': params['head_ref'] or params['head_rev'],
             'head_rev': params['head_rev'],
             'pushdate': pushdate,
-            'push_epoch': push_epoch,
             'pushtime': pushdate[8:],
             'year': pushdate[0:4],
             'month': pushdate[4:6],
             'day': pushdate[6:8],
+            'rank': push_epoch,
             'owner': params['owner'],
             'level': params['level'],
             'from_now': json_time_from_now,
@@ -449,6 +449,13 @@ class LegacyTask(base.Task):
             build_parameters['build_type'] = task_extra['build_type']
             build_parameters['build_product'] = task_extra['build_product']
 
+            if 'treeherder' in task_extra:
+                tier = task_extra['treeherder'].get('tier', 1)
+                if tier != 1:
+                    # Only tier 1 jobs use the build time as rank. Everything
+                    # else gets rank 0 until it is promoted to tier 1.
+                    task_extra['index']['rank'] = 0
+
             set_interactive_task(build_task, interactive)
 
             # try builds don't use cache