Adding ability to bisect recipe to bisect into dependency repos.

scripts/slave/recipe_modules/auto_bisect/example.py

Index: scripts/slave/recipe_modules/auto_bisect/example.py
diff --git a/scripts/slave/recipe_modules/auto_bisect/example.py b/scripts/slave/recipe_modules/auto_bisect/example.py
new file mode 100644
index 0000000000000000000000000000000000000000..a95aea0ea08f5a704e3c6bedc98eb310b438aa3f
--- /dev/null
+++ b/scripts/slave/recipe_modules/auto_bisect/example.py
@@ -0,0 +1,115 @@
+# Copyright 2015 The Chromium Authors. All rights reserved.
+# Use of this source code is governed by a BSD-style license that can be
+# found in the LICENSE file.
+
+import json
+
+DEPS = [
+    'auto_bisect',
+    'path',
+    'properties',
+    'raw_io',
+]
+
+
+def GenSteps(api):
+  # This would ordinarily be done by
+  #   api.chromium_tests.sync_and_configure_build

[qyearsley, 2015/02/22 20:37:55]

# This would ordinarily be done by
# `api.chromium_tests.sync_and_configure_build`.

Is this saying that api.path['checkout'] would normally be set in
api.chromium_tests.sync_and_configure_build?

[RobertoCN, 2015/02/24 20:01:14]

Yes. Changing the comment to make it more clear.

+  fake_checkout_path = api.path.mkdtemp('fake_checkout')
+  api.path['checkout'] = fake_checkout_path
+  #Create a bisector

[qyearsley, 2015/02/22 20:37:55]

Space after "#".

[RobertoCN, 2015/02/24 20:01:14]

Done.

+  bisector = api.auto_bisect.create_bisector(api.properties['bisect_config'])
+  # Request builds
+  bisector.good_rev.start_job()
+  bisector.bad_rev.start_job()
+  # Wait for builds and tests to finish
+  bisector.wait_for_all([bisector.good_rev, bisector.bad_rev])
+
+  # TODO(robertocn): Add examples for the following operations
+  # Check improvement direction
+  # Check regression confidence
+  # Get revisions to check
+  # Check if bisect is finished
+  # Abort unnecesary jobs
+  # Print results
+
+
+def GenTests(api):
+  yield _basic_test(api)
+
+
+def _basic_test(api):
+  test_data = [
+      {
+          'hash': 'a6298e4afedbf2cd461755ea6f45b0ad64222222',
+           'commit_pos': '314015',

[qyearsley, 2015/02/22 20:37:55]

Indentation alignment.

[RobertoCN, 2015/02/24 20:01:14]

Done.

+           'test_results': {'results':{
+               'mean': 20,
+               'std_err': 1,
+               'values': [19, 20, 21],
+           }}
+      },
+      {
+          'hash': '00316c9ddfb9d7b4e1ed2fff9fe6d964d2111111',
+           'commit_pos': '314016',
+           'test_results': {'results':{
+               'mean': 15,
+               'std_err': 1,
+               'values': [14, 15, 16],
+           }}
+      },
+ ]

[qyearsley, 2015/02/22 20:37:55]

Indentation alignment.

[RobertoCN, 2015/02/24 20:01:14]

Done.

+  basic_test =  api.test('basic')
+  for revision_data in test_data:
+    for step_data in _get_step_data_for_revision(api, revision_data):
+      basic_test += step_data
+  basic_test += api.properties(bisect_config=_get_default_config())
+  return basic_test
+
+
+def _get_default_config():
+  example_config = {
+      'test_type':'perf',
+      'command':
+        ('src/tools/perf/run_benchmark -v --browser=release smoothness.'

[qyearsley, 2015/02/22 20:37:55]

Indent 4 spaces.

[RobertoCN, 2015/02/24 20:01:14]

Done.

+        'tough_scrolling_cases'),
+      'good_revision': '314015',
+      'bad_revision': '314016',
+      'metric': 'mean_input_event_latency/mean_input_event_latency',
+      'repeat_count': '2',
+      'max_time_minutes': '5',
+      'truncate_percent': '0',
+      'bug_id': '',
+      'gs_bucket': 'chrome-perf',
+      'builder_host': 'master4.golo.chromium.org',
+      'builder_port': '8341',
+      'dummy_builds': 'True',
+  }
+  return example_config
+
+
+def _get_step_data_for_revision(api, revision_data, include_build_steps=True):
+  """Generator that produces step patches for fake results."""
+  commit_pos = revision_data['commit_pos']
+  commit_hash = revision_data['hash']
+  test_results = revision_data['test_results']
+
+  step_name ='resolving commit_pos ' + commit_pos
+  yield api.step_data(step_name, stdout=api.raw_io.output('hash:' +
+                                                            commit_hash))
+
+  step_name ='resolving hash ' + commit_hash
+  commit_pos_str = 'refs/heads/master@{#%s}' % commit_pos
+  yield api.step_data(step_name, stdout=api.raw_io.output(commit_pos_str))
+
+  if include_build_steps:
+    step_name ='gsutil Get test results for build ' + commit_hash
+    yield api.step_data(step_name, stdout=api.raw_io.output(json.dumps(
+        test_results)))
+
+    step_name = 'Get test status for build ' + commit_hash
+    yield api.step_data(step_name, stdout=api.raw_io.output('Complete'))
+
+    step_name ='gsutil Get test status url for build ' + commit_hash
+    yield api.step_data(step_name, stdout=api.raw_io.output('dummy/url'))
+