1 files changed, 24 insertions, 0 deletions
diff --git a/python/mozbuild/mozbuild/action/util.py b/python/mozbuild/mozbuild/action/util.py
new file mode 100644
index 0000000000..d4102629ff
--- /dev/null
+++ b/python/mozbuild/mozbuild/action/util.py
@@ -0,0 +1,24 @@
+# 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/.
+
+import json
+import sys
+import time
+
+
+def log_build_task(f, *args, **kwargs):
+    """Run the given function, representing an entire build task, and log the
+    BUILDTASK metadata row to stdout.
+    """
+    start = time.monotonic()
+    try:
+        return f(*args, **kwargs)
+    finally:
+        end = time.monotonic()
+        print(
+            "BUILDTASK %s"
+            % json.dumps(
+                {"argv": sys.argv, "start": start, "end": end, "context": None}
+            )
+        )