Bug 1459181 - Fetch version-specific "whatsnew" on mozilla-release only r=sfraser

MozReview-Commit-ID: Iaet3uja3vG

--HG--
extra : rebase_source : a2a7a5b449361c9ec1e89d34feda11a9f64f5d3b

taskcluster/ci/google-play-strings/kind.yml

@@ -37,6 +37,15 @@ jobs:
                   mozilla-beta: org.mozilla.firefox_beta
                   mozilla-release: org.mozilla.firefox
                   default: org.mozilla.fennec_aurora  # Fetches strings for mozilla-central
+            MAJOR_VERSION_NUMBER:
+               by-project:
+                  # Specifying major version allows get_l10n_strings.py to download the correct
+                  # "whatsnew" section in Fennec RCs. We don't specify it in mozilla-beta because
+                  # strings may not be ready at the time of the first Fennec beta.
+                  mozilla-release: "{major_version}"
+                  # Will be unset by transform if empty
+                  default: ''
+
             # XXX The folder depends on the one defined in the Dockerfile
             GOOGLE_PLAY_STRING_FILE: /builds/worker/google_play_strings.json
          command:
@@ -46,6 +55,7 @@ jobs:
               python3 ./mozapkpublisher/get_l10n_strings.py
               --package-name "${PACKAGE_NAME}"
               --output-file "${GOOGLE_PLAY_STRING_FILE}"
+              ${MAJOR_VERSION_NUMBER+--major-version-number ${MAJOR_VERSION_NUMBER}}
       treeherder:
          symbol: pub(gps)
          platform: Android/opt

taskcluster/taskgraph/transforms/google_play_strings.py

@@ -10,6 +10,7 @@ from __future__ import absolute_import, print_function, unicode_literals
 from taskgraph.transforms.base import TransformSequence
 from taskgraph.transforms.task import task_description_schema
 from taskgraph.util.schema import resolve_keyed_by, Schema, validate_schema
+from taskgraph.util.scriptworker import get_release_config
 
 from voluptuous import Required
 
@@ -57,4 +58,17 @@ def set_worker_data(config, jobs):
             project=config.params['project']
         )
 
+        resolve_keyed_by(
+            env, 'MAJOR_VERSION_NUMBER', item_name=job['name'],
+            project=config.params['project']
+        )
+        if env.get('MAJOR_VERSION_NUMBER'):
+            release_config = get_release_config(config)
+            major_version = release_config['version'].split('.')[0]
+            env['MAJOR_VERSION_NUMBER'] = env['MAJOR_VERSION_NUMBER'].format(
+                major_version=major_version
+            )
+        else:
+            del env['MAJOR_VERSION_NUMBER']
+
         yield job