Add bisect-config-trying script and a few example configs.

tools/auto_bisect/configs/try.py

Index: tools/auto_bisect/configs/try.py
diff --git a/tools/auto_bisect/configs/try.py b/tools/auto_bisect/configs/try.py
new file mode 100755
index 0000000000000000000000000000000000000000..dd3a3b91108f787c6377f5e8da2bf3b8e58e776e
--- /dev/null
+++ b/tools/auto_bisect/configs/try.py
@@ -0,0 +1,142 @@
+#!/usr/bin/env python
+
+"""Starts bisect try jobs on multiple platforms using known-good configs.
+
+The purpose of this script is to serve as an integration test for the
+auto-bisect project by starting try jobs for various config types and
+various platforms.
+
+The known-good configs are in this same directory as this script. They
+are expected to all end in ".cfg" and start with the name of the platform
+followed by a dot.
+
+You can specify --full to try running each config on all applicable bots;
+the default behavior is to try each config on only one bot.
+"""
+
+import argparse
+import logging
+import os
+import subprocess
+import sys
+
+SCRIPT_DIR = os.path.dirname(__file__)
+BISECT_CONFIG = os.path.join(SCRIPT_DIR, os.path.pardir, 'bisect.cfg')
+PERF_TEST_CONFIG = os.path.join(
+    SCRIPT_DIR, os.path.pardir, os.path.pardir, 'run-perf-test.cfg')
+PLATFORM_BOT_MAP = {
+    'linux': ['linux_perf_bot'],
+    'mac': ['mac_perf_bisect', 'mac_10_9_perf_bisect'],
+    'win': ['win_perf_bisect', 'win_8_perf_bisect', 'win_xp_perf_bisect'],
+    'android': [
+        'android_nexus4_perf_bisect',
+        'android_nexus5_perf_bisect',
+        'android_nexus7_perf_bisect',
+        'android_nexus10_perf_bisect',
+    ],
+}
+SVN_URL = 'svn://svn.chromium.org/chrome-try/try-perf'
+AUTO_COMMIT_MESSAGE = 'Automatic commit for bisect try job.'
+
+
+def main(argv):
+  parser = argparse.ArgumentParser(description=__doc__)
+  parser.add_argument('--full', action='store_true',
+                      help='Run each config on all applicable bots.')
+  parser.add_argument('--filter', help='Filter config filenames to use.')

[Sergiy Byelozyorov, 2014/10/21 19:15:30]

Please explain better that only configs whose filename contains filter will be
executed.

[qyearsley, 2014/10/21 19:21:24]

Expanded this help a little bit.

+  parser.add_argument('--verbose', '-v', action='store_true')
+  args = parser.parse_args(argv[1:])
+  _SetupLogging(args.verbose)
+  source_configs = _SourceConfigs(args.filter)
+  logging.debug('Source configs: %s', source_configs)
+  try:
+    _StartTryJobs(source_configs, args.full)
+  except subprocess.CalledProcessError as error:
+    print str(error)
+    print error.output
+
+
+def _SetupLogging(verbose):
+  level = logging.INFO
+  if verbose:
+    level = logging.DEBUG
+  logging.basicConfig(level=level)
+
+
+def _SourceConfigs(name_filter):
+  """Gets a list of paths to sample configs to try."""
+  files = os.listdir(SCRIPT_DIR)
+  files = [os.path.join(SCRIPT_DIR, name) for name in files]
+  files = [name for name in files if name.endswith('.cfg')]
+  if name_filter:
+    files = [name for name in files if name_filter in name]
+  return files
+
+
+def _StartTryJobs(source_configs, full_mode=False):
+  """Tries each of the given sample configs on one or more try bots."""
+  for source_config in source_configs:
+    dest_config = _DestConfig(source_config)
+    bot_names = _BotNames(source_config, full_mode=full_mode)
+    _StartTry(source_config, dest_config, bot_names)
+
+
+def _DestConfig(source_config):
+  """Returns the path that a sample config should be copied to."""
+  if 'bisect' in source_config:
+    return BISECT_CONFIG
+  assert 'perf_test' in source_config, source_config
+  return PERF_TEST_CONFIG
+
+
+def _BotNames(source_config, full_mode=False):
+  """Returns try bot names to use for the given config file name."""
+  platform = os.path.basename(source_config).split('.')[0]
+  assert platform in PLATFORM_BOT_MAP
+  bot_names = PLATFORM_BOT_MAP[platform]
+  if full_mode:
+    return bot_names
+  return [bot_names[0]]
+
+
+def _StartTry(source_config, dest_config, bot_names):
+  """Sends a try job with the given config to the given try bots.
+
+  Args:
+    source_config: Path of the sample config to copy over.
+    dest_config: Destination path to copy sample to, e.g. "./bisect.cfg".
+    bot_names: List of try bot builder names.
+  """
+  assert os.path.exists(source_config)
+  assert os.path.exists(dest_config)
+  assert _LastCommitMessage() != AUTO_COMMIT_MESSAGE
+
+  # Copy the sample config over and commit it.
+  _Run(['cp', source_config, dest_config])
+  _Run(['git', 'commit', '--all', '-m', AUTO_COMMIT_MESSAGE])
+

[Sergiy Byelozyorov, 2014/10/21 19:15:30]

try:

[qyearsley, 2014/10/21 19:21:24]

Good idea, added.

+  # Start the try job.
+  job_name = 'Automatically-started job with sample config %s' % source_config
+  try_command = ['git', 'try', '--svn_repo', SVN_URL, '-n', job_name]
+  for bot_name in bot_names:
+    try_command.extend(['-b', bot_name])
+  print _Run(try_command)
+

[Sergiy Byelozyorov, 2014/10/21 19:15:30]

finally:

+  # Revert the immediately-previous commit which was made just above.
+  assert _LastCommitMessage() == AUTO_COMMIT_MESSAGE

[Sergiy Byelozyorov, 2014/10/21 19:15:30]

Great safeguard!

+  _Run(['git', 'reset', '--hard', 'HEAD~1'])
+
+
+def _LastCommitMessage():
+  return _Run(['git', 'log', '--format=%s', '-1']).strip()
+
+
+def _Run(command):
+  logging.debug('Running %s', command)
+  # Note: check_output will raise a subprocess.CalledProcessError when
+  # the return-code is non-zero.
+  return subprocess.check_output(command)
+
+
+if __name__ == '__main__':
+  sys.exit(main(sys.argv))