Bug 1652184: Report to perherder stats about bugbug timings; r=ahal

Differential Revision: https://phabricator.services.mozilla.com/D83212

.taskcluster.yml

@@ -200,6 +200,7 @@ tasks:
                             GECKO_HEAD_REV: '${push.revision}'
                             HG_STORE_PATH: /builds/worker/checkouts/hg-store
                             TASKCLUSTER_CACHES: /builds/worker/checkouts
+                            MOZ_AUTOMATION: '1'
                             # mach generates pyc files when reading `mach_commands.py`
                             # This causes cached_task digest generation to be random for
                             # some tasks. Disable bytecode generation to work around that.

taskcluster/taskgraph/test/conftest.py

@@ -11,3 +11,15 @@
 def responses():
     with RequestsMock() as rsps:
         yield rsps
+
+
+@pytest.fixture(scope="session", autouse=True)
+def patch_prefherder(request):
+    from _pytest.monkeypatch import MonkeyPatch
+
+    m = MonkeyPatch()
+    m.setattr(
+        "taskgraph.util.bugbug._write_perfherder_data", lambda lower_is_better: None,
+    )
+    yield
+    m.undo()

taskcluster/taskgraph/util/bugbug.py

@@ -4,6 +4,9 @@
 
 from __future__ import absolute_import, print_function, unicode_literals
 
+import os
+import json
+import sys
 import time
 
 import requests
@@ -45,10 +48,31 @@ def get_session():
     return requests_retry_session(retries=5, session=s)
 
 
+def _write_perfherder_data(lower_is_better):
+    if os.environ.get("MOZ_AUTOMATION", "0") == "1":
+        perfherder_data = {
+            "framework": {"name": "build_metrics"},
+            "suites": [
+                {
+                    "name": suite,
+                    "value": value,
+                    "lowerIsBetter": True,
+                    "shouldAlert": False,
+                    "subtests": [],
+                }
+                for suite, value in lower_is_better.items()
+            ],
+        }
+        print(
+            "PERFHERDER_DATA: {}".format(json.dumps(perfherder_data)), file=sys.stderr
+        )
+
+
 @memoize
 def push_schedules(branch, rev):
     url = BUGBUG_BASE_URL + '/push/{branch}/{rev}/schedules'.format(branch=branch, rev=rev)
-
+    # TODO(py3): use time.monotonic()
+    start = time.clock()
     session = get_session()
     attempts = RETRY_TIMEOUT / RETRY_INTERVAL
     i = 0
@@ -61,6 +85,12 @@ def push_schedules(branch, rev):
 
         time.sleep(RETRY_INTERVAL)
         i += 1
+    end = time.clock()
+
+    _write_perfherder_data(lower_is_better={
+        'bugbug_push_schedules_time': end-start,
+        'bugbug_push_schedules_retries': i,
+    })
 
     data = r.json()
     if r.status_code == 202:

tools/lint/black.yml

@@ -6,6 +6,7 @@ black:
         - python/mozrelease/mozrelease/scriptworker_canary.py
         - taskcluster/docker/funsize-update-generator
         - taskcluster/taskgraph/actions/scriptworker_canary.py
+        - taskcluster/taskgraph/test/conftest.py
         - taskcluster/taskgraph/transforms/scriptworker_canary.py
         - testing/condprofile/condprof
         - tools/crashreporter/system-symbols