Bug 1597109 - Define a ship it task that will (sometimes) schedule a release. r=rail

Differential Revision: https://phabricator.services.mozilla.com/D54729

--HG--
extra : moz-landing-system : lando

taskcluster/ci/maybe-release/kind.yml

@@ -0,0 +1,40 @@
+# This Source Code Form is subject to the terms of the Mozilla Public
+# License, v. 2.0. If a copy of the MPL was not distributed with this
+# file, You can obtain one at http://mozilla.org/MPL/2.0/.
+---
+loader: taskgraph.loader.transform:loader
+
+transforms:
+    - taskgraph.transforms.maybe_release:transforms
+    - taskgraph.transforms.task:transforms
+
+job-defaults:
+    description: Check recent releases and trigger a new ship-it phase if worthwhile.
+    worker-type:
+        by-release-level:
+            production: scriptworker-k8s/gecko-3-shipit
+            staging: scriptworker-k8s/gecko-1-shipit
+    worker:
+        implementation: shipit-maybe-release
+    scopes:
+        by-release-level:
+            production:
+                - project:releng:ship-it:server:production
+                - project:releng:ship-it:action:create-new-release
+            staging:
+                - project:releng:ship-it:server:staging
+                - project:releng:ship-it:action:create-new-release
+    run-on-projects: []
+
+jobs:
+    firefox:
+        name: maybe-release-firefox
+        shipping-product: firefox
+        worker:
+            phase: push_firefox
+
+    devedition:
+        name: maybe-release-devedition
+        shipping-product: devedition
+        worker:
+            phase: push_devedition

taskcluster/docs/kinds.rst

@@ -617,6 +617,15 @@ iris
 ----
 Iris testing suite
 
+maybe-release
+-------------
+A shipitscript task that does the following:
+
+1. Checks if automated releases are disabled
+2. Checks if the changes between the current revision and the previous releases
+   revision are considered "worthwhile" for a new release.
+3. Triggers the release via ship-it, which will then create an action task.
+
 l10n-bump
 ---------
 Cron-driven tasks that bump l10n-changesets files in-tree, using data from the l10n dashboard.

taskcluster/taskgraph/transforms/maybe_release.py

@@ -0,0 +1,21 @@
+# This Source Code Form is subject to the terms of the Mozilla Public
+# License, v. 2.0. If a copy of the MPL was not distributed with this
+# file, You can obtain one at http://mozilla.org/MPL/2.0/.
+
+from __future__ import absolute_import, print_function, unicode_literals
+
+from taskgraph.transforms.base import TransformSequence
+from taskgraph.util.schema import resolve_keyed_by
+
+transforms = TransformSequence()
+
+
+@transforms.add
+def make_task_description(config, jobs):
+    for job in jobs:
+        for key in ['worker-type', 'scopes']:
+            resolve_keyed_by(
+                job, key, item_name=job['name'],
+                **{'release-level': config.params.release_level()}
+            )
+        yield job

taskcluster/taskgraph/transforms/release_mark_as_shipped.py

@@ -1,9 +1,6 @@
 # This Source Code Form is subject to the terms of the Mozilla Public
 # License, v. 2.0. If a copy of the MPL was not distributed with this
 # file, You can obtain one at http://mozilla.org/MPL/2.0/.
-"""
-Add from parameters.yml into Balrog publishing tasks.
-"""
 
 from __future__ import absolute_import, print_function, unicode_literals
 

taskcluster/taskgraph/transforms/task.py

@@ -1220,6 +1220,24 @@ def build_ship_it_shipped_payload(config, task, task_def):
     }
 
 
+@payload_builder('shipit-maybe-release', schema={
+    Required('phase'): basestring,
+})
+def build_ship_it_maybe_release_payload(config, task, task_def):
+    # expect branch name, including path
+    branch = config.params['head_repository'][len('https://hg.mozilla.org/'):]
+    # 'version' is e.g. '71.0b13' (app_version doesn't have beta number)
+    version = config.params['version']
+
+    task_def['payload'] = {
+        'product': task['shipping-product'],
+        'branch': branch,
+        'phase': task['worker']['phase'],
+        'version': version,
+        'cron_revision': config.params['head_rev'],
+    }
+
+
 @payload_builder('push-addons', schema={
     Required('channel'): Any('listed', 'unlisted'),
     Required('upstream-artifacts'): [{