Bug 1600952 - Do not run the diff-reproducible-linux32 task on beta/release as intended in bug 1577212. r=tomprince

Differential Revision: https://phabricator.services.mozilla.com/D55766

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

taskcluster/ci/diffoscope/kind.yml

@@ -67,6 +67,7 @@ jobs:
         new: build-linux-reproduced/opt
         original: build-linux-shippable/opt
         fail-on-diff: true
+        run-on-projects: ['mozilla-central', 'try']
 
 
 # Make a task for each diff we might want. The following are just examples,

taskcluster/taskgraph/transforms/diffoscope.py

@@ -9,6 +9,7 @@ defined in kind.yml
 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 (
     Schema,
 )
@@ -55,6 +56,9 @@ diff_description_schema = Schema({
 
     # Commands to run before performing the diff.
     Optional('pre-diff-commands'): [basestring],
+
+    # Only run the task on a set of projects/branches.
+    Optional('run-on-projects'): task_description_schema['run-on-projects'],
 })
 
 transforms = TransformSequence()
@@ -155,6 +159,8 @@ def fill_template(config, tasks):
             },
             'dependencies': deps,
         }
+        if 'run-on-projects' in task:
+            taskdesc['run-on-projects'] = task['run-on-projects']
 
         if artifact.endswith('.dmg'):
             taskdesc.setdefault('fetches', {}).setdefault('toolchain', []).extend([