1 files changed, 32 insertions, 0 deletions
diff --git a/taskcluster/taskgraph/transforms/visual_metrics.py b/taskcluster/taskgraph/transforms/visual_metrics.py
new file mode 100644
index 0000000000..b2b2b2fa32
--- /dev/null
+++ b/taskcluster/taskgraph/transforms/visual_metrics.py
@@ -0,0 +1,32 @@
+# 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/.
+"""
+These transformations take a task description for a visual metrics task and
+add the necessary environment variables to run on the given inputs.
+"""
+
+from __future__ import absolute_import, print_function, unicode_literals
+
+import json
+
+from taskgraph.transforms.base import TransformSequence
+
+transforms = TransformSequence()
+
+
+@transforms.add
+def set_visual_metrics_jobs(config, jobs):
+    """Set the visual metrics configuration for the given jobs."""
+    vismet_jobs = config.params["try_task_config"].get("visual-metrics-jobs")
+
+    if vismet_jobs:
+        vismet_jobs = json.dumps(vismet_jobs)
+
+    for job in jobs:
+        if vismet_jobs:
+            job["task"]["payload"].setdefault("env", {}).update(
+                VISUAL_METRICS_JOBS_JSON=vismet_jobs
+            )
+
+        yield job