1 files changed, 81 insertions, 0 deletions
diff --git a/taskcluster/gecko_taskgraph/transforms/merge_automation.py b/taskcluster/gecko_taskgraph/transforms/merge_automation.py
new file mode 100644
index 0000000000..ca5f3b6bde
--- /dev/null
+++ b/taskcluster/gecko_taskgraph/transforms/merge_automation.py
@@ -0,0 +1,81 @@
+# 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/.
+"""
+Transform the update generation task into an actual task description.
+"""
+
+from taskgraph.transforms.base import TransformSequence
+from taskgraph.util.schema import resolve_keyed_by
+
+transforms = TransformSequence()
+
+
+@transforms.add
+def handle_keyed_by(config, tasks):
+    """Resolve fields that can be keyed by platform, etc."""
+    if "merge_config" not in config.params:
+        return
+    merge_config = config.params["merge_config"]
+    fields = [
+        "worker.push",
+        "worker-type",
+        "worker.l10n-bump-info",
+        "worker.source-repo",
+    ]
+    for task in tasks:
+        for field in fields:
+            resolve_keyed_by(
+                task,
+                field,
+                item_name=task["name"],
+                **{
+                    "project": config.params["project"],
+                    "release-type": config.params["release_type"],
+                    "behavior": merge_config["behavior"],
+                }
+            )
+        yield task
+
+
+@transforms.add
+def update_labels(config, tasks):
+    for task in tasks:
+        merge_config = config.params["merge_config"]
+        task["label"] = "merge-{}".format(merge_config["behavior"])
+        treeherder = task.get("treeherder", {})
+        treeherder["symbol"] = "Rel({})".format(merge_config["behavior"])
+        task["treeherder"] = treeherder
+        yield task
+
+
+@transforms.add
+def add_payload_config(config, tasks):
+    for task in tasks:
+        if "merge_config" not in config.params:
+            break
+        merge_config = config.params["merge_config"]
+        worker = task["worker"]
+        worker["merge-info"] = config.graph_config["merge-automation"]["behaviors"][
+            merge_config["behavior"]
+        ]
+
+        if "l10n-bump-info" in worker and worker["l10n-bump-info"] is None:
+            del worker["l10n-bump-info"]
+
+        # Override defaults, useful for testing.
+        for field in [
+            "from-repo",
+            "from-branch",
+            "to-repo",
+            "to-branch",
+            "fetch-version-from",
+        ]:
+            if merge_config.get(field):
+                worker["merge-info"][field] = merge_config[field]
+
+        worker["force-dry-run"] = merge_config["force-dry-run"]
+        worker["ssh-user"] = merge_config.get("ssh-user-alias", "merge_user")
+        if merge_config.get("push"):
+            worker["push"] = merge_config["push"]
+        yield task