1 files changed, 53 insertions, 0 deletions
diff --git a/taskcluster/android_taskgraph/transforms/treeherder.py b/taskcluster/android_taskgraph/transforms/treeherder.py
new file mode 100644
index 0000000000..d0a1eede07
--- /dev/null
+++ b/taskcluster/android_taskgraph/transforms/treeherder.py
@@ -0,0 +1,53 @@
+# 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 taskgraph.transforms.base import TransformSequence
+from taskgraph.util.dependencies import get_dependencies, get_primary_dependency
+from taskgraph.util.schema import resolve_keyed_by
+from taskgraph.util.treeherder import inherit_treeherder_from_dep, join_symbol
+
+transforms = TransformSequence()
+
+
+@transforms.add
+def resolve_keys(config, tasks):
+    for task in tasks:
+        if not task["attributes"].get("build-type"):
+            task["attributes"]["build-type"] = task["name"]
+
+        resolve_keyed_by(
+            task,
+            "treeherder.symbol",
+            item_name=task["name"],
+            **{
+                "build-type": task["attributes"]["build-type"],
+                "level": config.params["level"],
+            },
+        )
+        yield task
+
+
+@transforms.add
+def build_treeherder_definition(config, tasks):
+    for task in tasks:
+        primary_dep = get_primary_dependency(config, task)
+        if not primary_dep and task.get("primary-dependency"):
+            primary_dep = task.pop("primary-dependency")
+
+        elif not primary_dep:
+            deps = list(get_dependencies(config, task)) or list(
+                task["dependent-tasks"].values()
+            )
+            primary_dep = deps[0]
+
+        task.setdefault("treeherder", {}).update(
+            inherit_treeherder_from_dep(task, primary_dep)
+        )
+        task_group = primary_dep.task["extra"]["treeherder"].get("groupSymbol", "?")
+        job_symbol = task["treeherder"].pop("symbol")
+        full_symbol = join_symbol(task_group, job_symbol)
+        task["treeherder"]["symbol"] = full_symbol
+
+        yield task