The second solution solution for ToT catapult.

scripts/slave/recipes/bisection/desktop_bisect.py

 # Copyright (c) 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.
 
 DEPS = [
     'auto_bisect',
     'bisect_tester',
     'chromium',
     'chromium_tests',
     'depot_tools/gclient',
@@ skipping 11 matching lines @@
   buildername = api.properties.get('buildername')
   # TODO(akuegel): Explicitly load the builder configs instead of relying on
   # builder.py from chromium_tests recipe module.
   bot_config = api.chromium_tests.create_bot_config_object(mastername,
                                                            buildername)
   api.chromium_tests.configure_build(bot_config)
   api.gclient.apply_config('perf')
   # TODO(robertocn): remove do_not_nest_wait_for_revision once downstream
   # expectations have been fixed, and make it behave like this by default.
   update_step, bot_db = api.chromium_tests.prepare_checkout(bot_config)
+  api.path.c.dynamic_paths['catapult'] = api.path['slave_build'].join(

[dtu, 2016/08/10 01:19:40]

What does this do?

[RobertoCN, 2016/08/10 22:59:54]

it makes it so that we can do api.path['catapult'].join('tracing', 'tracing',
'yaddayadda') and that we have a single place to change it (per recipe) if
needed. For example, it recently changed (through this last rebase) to getting
this path from AutoBisectApi.working_dir.

+      'catapult')
   api.auto_bisect.start_try_job(api, update_step=update_step, bot_db=bot_db,
                                 do_not_nest_wait_for_revision=True)
 
 
 def GenTests(api):
   yield (api.test('basic') + api.properties.tryserver(
       mastername='tryserver.chromium.perf',
       buildername='linux_perf_bisect') + api.override_step_data(
           'git diff to analyze patch',
           api.raw_io.stream_output('tools/auto_bisect/bisect.cfg')))
@@ skipping 283 matching lines @@
                                   buildername='linux_perf_bisect') +
          api.step_data('saving url to temp file',
                        stdout=api.raw_io.output('/tmp/dummy1')) + api.step_data(
                            'saving json to temp file',
                            stdout=api.raw_io.output('/tmp/dummy2')) +
          api.properties(bisect_config=bisect_ret_code_config) + api.properties(
              job_name='f7a7b4135624439cbd27fdd5133d74ec') +
          api.bisect_tester(tempfile='/tmp/dummy') + api.properties(
              parent_got_revision='1111111') + api.properties(
                  parent_build_archive_url='gs://test-domain/test-archive.zip'))