def swarming_trigger(swarming, raw_request, xsrf_token):
  """Triggers a request on the Swarming server and returns the json data.

  It's the low-level function.

  Returns:
    {
      'request': {
        'created_ts': u'2010-01-02 03:04:05',
        'name': ..
      },
      'task_id': '12300',
    }
  """
  logging.info('Triggering: %s', raw_request['name'])

  headers = {'X-XSRF-Token': xsrf_token}
  result = net.url_read_json(
      swarming + '/swarming/api/v1/client/request',
      data=raw_request,
      headers=headers)
  if not result:
    on_error.report('Failed to trigger task %s' % raw_request['name'])
    return None
  return result

def trigger_by_manifest(swarming, manifest):
  """Given a task manifest, triggers it for execution on swarming.

  Args:
    swarming: URL of a swarming service.
    manifest: instance of Manifest.

  Returns:
    tuple(Task id, priority) on success. tuple(None, None) on failure.
  """
  logging.info('Triggering: %s', manifest.task_name)
  manifest_text = manifest.to_json()
  result = net.url_read(swarming + '/test', data={'request': manifest_text})
  if not result:
    on_error.report('Failed to trigger task %s' % manifest.task_name)
    return None, None
  try:
    data = json.loads(result)
  except (ValueError, TypeError):
    msg = '\n'.join((
        'Failed to trigger task %s' % manifest.task_name,
        'Manifest: %s' % manifest_text,
        'Bad response: %s' % result))
    on_error.report(msg)
    return None, None
  if not data:
    return None, None
  return data['test_keys'][0]['test_key'], data['priority']

def CMDcollect(parser, args):
  """Retrieves results of a Swarming task.

  The result can be in multiple part if the execution was sharded. It can
  potentially have retries.
  """
  add_collect_options(parser)
  add_sharding_options(parser)
  (options, args) = parser.parse_args(args)
  if not args:
    parser.error('Must specify one task name.')
  elif len(args) > 1:
    parser.error('Must specify only one task name.')

  auth.ensure_logged_in(options.swarming)
  try:
    return collect(
        options.swarming,
        args[0],
        options.shards,
        options.timeout,
        options.decorate,
        options.print_status_updates,
        options.task_summary_json,
        options.task_output_dir)
  except Failure:
    on_error.report(None)
    return 1

def CMDtrigger(parser, args):
  """Triggers a Swarming task.

  Accepts either the hash (sha1) of a .isolated file already uploaded or the
  path to an .isolated file to archive, packages it if needed and sends a
  Swarming manifest file to the Swarming server.

  If an .isolated file is specified instead of an hash, it is first archived.

  Passes all extra arguments provided after '--' as additional command line
  arguments for an isolated command specified in *.isolate file.
  """
  add_trigger_options(parser)
  add_sharding_options(parser)
  args, isolated_cmd_args = extract_isolated_command_extra_args(args)
  parser.add_option(
      '--dump-json',
      metavar='FILE',
      help='Dump details about the triggered task(s) to this file as json')
  options, args = parser.parse_args(args)
  process_trigger_options(parser, options, args)

  auth.ensure_logged_in(options.swarming)
  if file_path.is_url(options.isolate_server):
    auth.ensure_logged_in(options.isolate_server)
  try:
    tasks, task_name = trigger(
        swarming=options.swarming,
        isolate_server=options.isolate_server or options.indir,
        namespace=options.namespace,
        file_hash_or_isolated=args[0],
        task_name=options.task_name,
        extra_args=isolated_cmd_args,
        shards=options.shards,
        dimensions=options.dimensions,
        env=dict(options.env),
        deadline=options.deadline,
        verbose=options.verbose,
        profile=options.profile,
        priority=options.priority)
    if tasks:
      if task_name != options.task_name:
        print('Triggered task: %s' % task_name)
      if options.dump_json:
        data = {
          'base_task_name': task_name,
          'tasks': tasks,
        }
        tools.write_json(options.dump_json, data, True)
    return int(not tasks)
  except Failure:
    on_error.report(None)
    return 1

def CMDcollect(parser, args):
  """Retrieves results of one or multiple Swarming task by its ID.

  The result can be in multiple part if the execution was sharded. It can
  potentially have retries.
  """
  add_collect_options(parser)
  parser.add_option(
      '-j', '--json',
      help='Load the task ids from .json as saved by trigger --dump-json')
  options, args = parser.parse_args(args)
  if not args and not options.json:
    parser.error('Must specify at least one task id or --json.')
  if args and options.json:
    parser.error('Only use one of task id or --json.')

  if options.json:
    options.json = unicode(os.path.abspath(options.json))
    try:
      with fs.open(options.json, 'rb') as f:
        data = json.load(f)
    except (IOError, ValueError):
      parser.error('Failed to open %s' % options.json)
    try:
      tasks = sorted(
          data['tasks'].itervalues(), key=lambda x: x['shard_index'])
      args = [t['task_id'] for t in tasks]
    except (KeyError, TypeError):
      parser.error('Failed to process %s' % options.json)
    if options.timeout is None:
      options.timeout = (
          data['request']['properties']['execution_timeout_secs'] +
          data['request']['expiration_secs'] + 10.)
  else:
    valid = frozenset('0123456789abcdef')
    if any(not valid.issuperset(task_id) for task_id in args):
      parser.error('Task ids are 0-9a-f.')

  try:
    return collect(
        options.swarming,
        args,
        options.timeout,
        options.decorate,
        options.print_status_updates,
        options.task_summary_json,
        options.task_output_dir,
        options.perf)
  except Failure:
    on_error.report(None)
    return 1

def CMDtrigger(parser, args):
  """Triggers a Swarming task.

  Accepts either the hash (sha1) of a .isolated file already uploaded or the
  path to an .isolated file to archive.

  If an .isolated file is specified instead of an hash, it is first archived.

  Passes all extra arguments provided after '--' as additional command line
  arguments for an isolated command specified in *.isolate file.
  """
  add_trigger_options(parser)
  add_sharding_options(parser)
  parser.add_option(
      '--dump-json',
      metavar='FILE',
      help='Dump details about the triggered task(s) to this file as json')
  options, args = parser.parse_args(args)
  task_request = process_trigger_options(parser, options, args)
  try:
    tasks = trigger_task_shards(
        options.swarming, task_request, options.shards)
    if tasks:
      print('Triggered task: %s' % options.task_name)
      tasks_sorted = sorted(
          tasks.itervalues(), key=lambda x: x['shard_index'])
      if options.dump_json:
        data = {
          'base_task_name': options.task_name,
          'tasks': tasks,
          'request': task_request_to_raw_request(task_request),
        }
        tools.write_json(unicode(options.dump_json), data, True)
        print('To collect results, use:')
        print('  swarming.py collect -S %s --json %s' %
            (options.swarming, options.dump_json))
      else:
        print('To collect results, use:')
        print('  swarming.py collect -S %s %s' %
            (options.swarming, ' '.join(t['task_id'] for t in tasks_sorted)))
      print('Or visit:')
      for t in tasks_sorted:
        print('  ' + t['view_url'])
    return int(not tasks)
  except Failure:
    on_error.report(None)
    return 1

def isolated_to_hash(isolate_server, namespace, arg, algo, verbose):
  """Archives a .isolated file if needed.

  Returns the file hash to trigger and a bool specifying if it was a file (True)
  or a hash (False).
  """
  if arg.endswith('.isolated'):
    file_hash = archive(isolate_server, namespace, arg, algo, verbose)
    if not file_hash:
      on_error.report('Archival failure %s' % arg)
      return None, True
    return file_hash, True
  elif isolateserver.is_valid_hash(arg, algo):
    return arg, False
  else:
    on_error.report('Invalid hash %s' % arg)
    return None, False

def isolated_to_hash(arg, algo):
    """Archives a .isolated file if needed.

  Returns the file hash to trigger and a bool specifying if it was a file (True)
  or a hash (False).
  """
    if arg.endswith(".isolated"):
        file_hash = isolated_format.hash_file(arg, algo)
        if not file_hash:
            on_error.report("Archival failure %s" % arg)
            return None, True
        return file_hash, True
    elif isolated_format.is_valid_hash(arg, algo):
        return arg, False
    else:
        on_error.report("Invalid hash %s" % arg)
        return None, False

def swarming_trigger(swarming, raw_request):
    """Triggers a request on the Swarming server and returns the json data.

  It's the low-level function.

  Returns:
    {
      'request': {
        'created_ts': u'2010-01-02 03:04:05',
        'name': ..
      },
      'task_id': '12300',
    }
  """
    logging.info("Triggering: %s", raw_request["name"])

    result = net.url_read_json(swarming + "/_ah/api/swarming/v1/tasks/new", data=raw_request)
    if not result:
        on_error.report("Failed to trigger task %s" % raw_request["name"])
        return None
    return result

def CMDcollect(parser, args):
    """Retrieves results of one or multiple Swarming task by its ID.

  The result can be in multiple part if the execution was sharded. It can
  potentially have retries.
  """
    add_collect_options(parser)
    parser.add_option("-j", "--json", help="Load the task ids from .json as saved by trigger --dump-json")
    options, args = parser.parse_args(args)
    if not args and not options.json:
        parser.error("Must specify at least one task id or --json.")
    if args and options.json:
        parser.error("Only use one of task id or --json.")

    if options.json:
        try:
            with open(options.json) as f:
                tasks = sorted(json.load(f)["tasks"].itervalues(), key=lambda x: x["shard_index"])
                args = [t["task_id"] for t in tasks]
        except (KeyError, IOError, TypeError, ValueError):
            parser.error("Failed to parse %s" % options.json)
    else:
        valid = frozenset("0123456789abcdef")
        if any(not valid.issuperset(task_id) for task_id in args):
            parser.error("Task ids are 0-9a-f.")

    try:
        return collect(
            options.swarming,
            None,
            args,
            options.timeout,
            options.decorate,
            options.print_status_updates,
            options.task_summary_json,
            options.task_output_dir,
        )
    except Failure:
        on_error.report(None)
        return 1

def CMDtrigger(parser, args):
    """Triggers a Swarming task.

  Accepts either the hash (sha1) of a .isolated file already uploaded or the
  path to an .isolated file to archive.

  If an .isolated file is specified instead of an hash, it is first archived.

  Passes all extra arguments provided after '--' as additional command line
  arguments for an isolated command specified in *.isolate file.
  """
    add_trigger_options(parser)
    add_sharding_options(parser)
    parser.add_option(
        "--dump-json", metavar="FILE", help="Dump details about the triggered task(s) to this file as json"
    )
    options, args = parser.parse_args(args)
    task_request = process_trigger_options(parser, options, args)
    try:
        tasks = trigger_task_shards(options.swarming, task_request, options.shards)
        if tasks:
            print ("Triggered task: %s" % options.task_name)
            tasks_sorted = sorted(tasks.itervalues(), key=lambda x: x["shard_index"])
            if options.dump_json:
                data = {"base_task_name": options.task_name, "tasks": tasks}
                tools.write_json(options.dump_json, data, True)
                print ("To collect results, use:")
                print ("  swarming.py collect -S %s --json %s" % (options.swarming, options.dump_json))
            else:
                print ("To collect results, use:")
                print (
                    "  swarming.py collect -S %s %s" % (options.swarming, " ".join(t["task_id"] for t in tasks_sorted))
                )
            print ("Or visit:")
            for t in tasks_sorted:
                print ("  " + t["view_url"])
        return int(not tasks)
    except Failure:
        on_error.report(None)
        return 1

def CMDrun(parser, args):
    """Triggers a task and wait for the results.

  Basically, does everything to run a command remotely.
  """
    add_trigger_options(parser)
    add_collect_options(parser)
    add_sharding_options(parser)
    options, args = parser.parse_args(args)
    task_request = process_trigger_options(parser, options, args)
    try:
        tasks = trigger_task_shards(options.swarming, task_request, options.shards)
    except Failure as e:
        on_error.report("Failed to trigger %s(%s): %s" % (options.task_name, args[0], e.args[0]))
        return 1
    if not tasks:
        on_error.report("Failed to trigger the task.")
        return 1
    print ("Triggered task: %s" % options.task_name)
    task_ids = [t["task_id"] for t in sorted(tasks.itervalues(), key=lambda x: x["shard_index"])]
    try:
        return collect(
            options.swarming,
            options.task_name,
            task_ids,
            options.timeout,
            options.decorate,
            options.print_status_updates,
            options.task_summary_json,
            options.task_output_dir,
        )
    except Failure:
        on_error.report(None)
        return 1

def swarming_trigger(swarming, raw_request):
  """Triggers a request on the Swarming server and returns the json data.

  It's the low-level function.

  Returns:
    {
      'request': {
        'created_ts': u'2010-01-02 03:04:05',
        'name': ..
      },
      'task_id': '12300',
    }
  """
  logging.info('Triggering: %s', raw_request['name'])

  result = net.url_read_json(
      swarming + '/_ah/api/swarming/v1/tasks/new', data=raw_request)
  if not result:
    on_error.report('Failed to trigger task %s' % raw_request['name'])
    return None
  if result.get('error'):
    # The reply is an error.
    msg = 'Failed to trigger task %s' % raw_request['name']
    if result['error'].get('errors'):
      for err in result['error']['errors']:
        if err.get('message'):
          msg += '\nMessage: %s' % err['message']
        if err.get('debugInfo'):
          msg += '\nDebug info:\n%s' % err['debugInfo']
    elif result['error'].get('message'):
      msg += '\nMessage: %s' % result['error']['message']

    on_error.report(msg)
    return None
  return result

def CMDrun(parser, args):
  """Triggers a task and wait for the results.

  Basically, does everything to run a command remotely.
  """
  add_trigger_options(parser)
  add_collect_options(parser)
  add_sharding_options(parser)
  args, isolated_cmd_args = extract_isolated_command_extra_args(args)
  options, args = parser.parse_args(args)
  process_trigger_options(parser, options, args)

  auth.ensure_logged_in(options.swarming)
  if file_path.is_url(options.isolate_server):
    auth.ensure_logged_in(options.isolate_server)
  try:
    tasks, task_name = trigger(
        swarming=options.swarming,
        isolate_server=options.isolate_server or options.indir,
        namespace=options.namespace,
        file_hash_or_isolated=args[0],
        task_name=options.task_name,
        extra_args=isolated_cmd_args,
        shards=options.shards,
        dimensions=options.dimensions,
        env=dict(options.env),
        deadline=options.deadline,
        verbose=options.verbose,
        profile=options.profile,
        priority=options.priority)
  except Failure as e:
    on_error.report(
        'Failed to trigger %s(%s): %s' %
        (options.task_name, args[0], e.args[0]))
    return 1
  if not tasks:
    on_error.report('Failed to trigger the task.')
    return 1
  if task_name != options.task_name:
    print('Triggered task: %s' % task_name)
  try:
    # TODO(maruel): Use task_ids, it's much more efficient!
    return collect(
        options.swarming,
        task_name,
        options.shards,
        options.timeout,
        options.decorate,
        options.print_status_updates,
        options.task_summary_json,
        options.task_output_dir)
  except Failure:
    on_error.report(None)
    return 1

def run_shell_out(url, mode):
  # Enable 'report_on_exception_exit' even though main file is *_test.py.
  on_error._is_in_test = lambda: False

  # Hack it out so registering works.
  on_error._ENABLED_DOMAINS = (socket.getfqdn(),)

  # Don't try to authenticate into localhost.
  on_error.net.OAuthAuthenticator = lambda *_: None

  if not on_error.report_on_exception_exit(url):
    print 'Failure to register the handler'
    return 1

  # Hack out certificate verification because we are using a self-signed
  # certificate here. In practice, the SSL certificate is signed to guard
  # against MITM attacks.
  on_error._SERVER.engine.session.verify = False

  if mode == 'crash':
    # Sadly, net is a bit overly verbose, which breaks
    # test_shell_out_crash_server_down.
    logging.error = lambda *_, **_kwargs: None
    logging.warning = lambda *_, **_kwargs: None
    raise ValueError('Oops')

  if mode == 'report':
    # Generate a manual report without an exception frame. Also set the version
    # value.
    setattr(sys.modules['__main__'], '__version__', '123')
    on_error.report('Oh dang')

  if mode == 'exception':
    # Report from inside an exception frame.
    try:
      raise TypeError('You are not my type')
    except TypeError:
      on_error.report('Really')

  if mode == 'exception_no_msg':
    # Report from inside an exception frame.
    try:
      raise TypeError('You are not my type #2')
    except TypeError:
      on_error.report(None)
  return 0

def map_and_run(
    isolated_hash, storage, cache, leak_temp_dir, root_dir, hard_timeout,
    grace_period, extra_args):
  """Maps and run the command. Returns metadata about the result."""
  result = {
    'duration': None,
    'exit_code': None,
    'had_hard_timeout': False,
    'internal_failure': None,
    'stats': {
    #  'download': {
    #    'duration': 0.,
    #    'initial_number_items': 0,
    #    'initial_size': 0,
    #    'items_cold': '<large.pack()>',
    #    'items_hot': '<large.pack()>',
    #  },
    #  'upload': {
    #    'duration': 0.,
    #    'items_cold': '<large.pack()>',
    #    'items_hot': '<large.pack()>',
    #  },
    },
    'outputs_ref': None,
    'version': 3,
  }
  if root_dir:
    if not fs.isdir(root_dir):
      fs.makedirs(root_dir, 0700)
    prefix = u''
  else:
    root_dir = os.path.dirname(cache.cache_dir) if cache.cache_dir else None
    prefix = u'isolated_'
  run_dir = make_temp_dir(prefix + u'run', root_dir)
  out_dir = make_temp_dir(prefix + u'out', root_dir)
  tmp_dir = make_temp_dir(prefix + u'tmp', root_dir)
  try:
    start = time.time()
    bundle = isolateserver.fetch_isolated(
        isolated_hash=isolated_hash,
        storage=storage,
        cache=cache,
        outdir=run_dir)
    if not bundle.command:
      # Handle this as a task failure, not an internal failure.
      sys.stderr.write(
          '<The .isolated doesn\'t declare any command to run!>\n'
          '<Check your .isolate for missing \'command\' variable>\n')
      if os.environ.get('SWARMING_TASK_ID'):
        # Give an additional hint when running as a swarming task.
        sys.stderr.write('<This occurs at the \'isolate\' step>\n')
      result['exit_code'] = 1
      return result
    result['stats']['download'] = {
      'duration': time.time() - start,
      'initial_number_items': cache.initial_number_items,
      'initial_size': cache.initial_size,
      'items_cold': base64.b64encode(large.pack(sorted(cache.added))),
      'items_hot': base64.b64encode(
          large.pack(sorted(set(cache.linked) - set(cache.added)))),
    }

    change_tree_read_only(run_dir, bundle.read_only)
    cwd = os.path.normpath(os.path.join(run_dir, bundle.relative_cwd))
    command = bundle.command + extra_args
    file_path.ensure_command_has_abs_path(command, cwd)
    sys.stdout.flush()
    start = time.time()
    try:
      result['exit_code'], result['had_hard_timeout'] = run_command(
          process_command(command, out_dir), cwd, tmp_dir, hard_timeout,
          grace_period)
    finally:
      result['duration'] = max(time.time() - start, 0)
  except Exception as e:
    # An internal error occured. Report accordingly so the swarming task will be
    # retried automatically.
    logging.exception('internal failure: %s', e)
    result['internal_failure'] = str(e)
    on_error.report(None)
  finally:
    try:
      if leak_temp_dir:
        logging.warning(
            'Deliberately leaking %s for later examination', run_dir)
      else:
        # On Windows rmtree(run_dir) call above has a synchronization effect: it
        # finishes only when all task child processes terminate (since a running
        # process locks *.exe file). Examine out_dir only after that call
        # completes (since child processes may write to out_dir too and we need
        # to wait for them to finish).
        if fs.isdir(run_dir):
          try:
            success = file_path.rmtree(run_dir)
          except OSError as e:
            logging.error('Failure with %s', e)
            success = False
          if not success:
            print >> sys.stderr, (
                'Failed to delete the run directory, forcibly failing\n'
#.........这里部分代码省略.........

def isolated_handle_options(options, args):
  """Handles '--isolated <isolated>', '<isolated>' and '-- <args...>' arguments.

  Returns:
    tuple(command, data).
  """
  isolated_cmd_args = []
  if not options.isolated:
    if '--' in args:
      index = args.index('--')
      isolated_cmd_args = args[index+1:]
      args = args[:index]
    else:
      # optparse eats '--' sometimes.
      isolated_cmd_args = args[1:]
      args = args[:1]
    if len(args) != 1:
      raise ValueError(
          'Use --isolated, --raw-cmd or \'--\' to pass arguments to the called '
          'process.')
    # Old code. To be removed eventually.
    options.isolated, is_file = isolated_to_hash(
        options.isolate_server, options.namespace, args[0],
        isolated_format.get_hash_algo(options.namespace), options.verbose)
    if not options.isolated:
      raise ValueError('Invalid argument %s' % args[0])
  elif args:
    is_file = False
    if '--' in args:
      index = args.index('--')
      isolated_cmd_args = args[index+1:]
      if index != 0:
        raise ValueError('Unexpected arguments.')
    else:
      # optparse eats '--' sometimes.
      isolated_cmd_args = args

  command = isolated_get_run_commands(
      options.isolate_server, options.namespace, options.isolated,
      isolated_cmd_args, options.verbose)

  # If a file name was passed, use its base name of the isolated hash.
  # Otherwise, use user name as an approximation of a task name.
  if not options.task_name:
    if is_file:
      key = os.path.splitext(os.path.basename(args[0]))[0]
    else:
      key = options.user
    options.task_name = u'%s/%s/%s' % (
        key,
        '_'.join(
            '%s=%s' % (k, v)
            for k, v in sorted(options.dimensions.iteritems())),
        options.isolated)

  try:
    data = isolated_get_data(options.isolate_server)
  except (IOError, OSError):
    on_error.report('Failed to upload the zip file')
    raise ValueError('Failed to upload the zip file')

  return command, data

def trigger_task_shards(
    swarming, isolate_server, namespace, isolated_hash, task_name, extra_args,
    shards, dimensions, env, deadline, verbose, profile, priority):
  """Triggers multiple subtasks of a sharded task.

  Returns:
    Dict with task details, returned to caller as part of --dump-json output.
    None in case of failure.
  """
  # Collects all files that are necessary to bootstrap a task execution
  # on the bot. Usually it includes self contained run_isolated.zip and
  # a bunch of small other scripts. All heavy files are pulled
  # by run_isolated.zip. Updated in 'setup_run_isolated'.
  bundle = zip_package.ZipPackage(ROOT_DIR)

  # Make a separate Manifest for each shard, put shard index and number of
  # shards into env and subtask name.
  manifests = []
  for index in xrange(shards):
    manifest = Manifest(
        isolate_server=isolate_server,
        namespace=namespace,
        isolated_hash=isolated_hash,
        task_name=get_shard_task_name(task_name, shards, index),
        extra_args=extra_args,
        dimensions=dimensions,
        env=setup_googletest(env, shards, index),
        deadline=deadline,
        verbose=verbose,
        profile=profile,
        priority=priority)
    setup_run_isolated(manifest, bundle)
    manifests.append(manifest)

  # Upload zip bundle file to get its URL.
  try:
    bundle_url = upload_zip_bundle(isolate_server, bundle)
  except (IOError, OSError):
    on_error.report('Failed to upload the zip file for task %s' % task_name)
    return None, None

  # Attach that file to all manifests.
  for manifest in manifests:
    manifest.add_bundled_file('swarm_data.zip', bundle_url)

  # Trigger all the subtasks.
  tasks = {}
  priority_warning = False
  for index, manifest in enumerate(manifests):
    task_id, priority = trigger_by_manifest(swarming, manifest)
    if not task_id:
      break
    if not priority_warning and priority != manifest.priority:
      priority_warning = True
      print >> sys.stderr, 'Priority was reset to %s' % priority
    tasks[manifest.task_name] = {
      'shard_index': index,
      'task_id': task_id,
      'view_url': '%s/user/task/%s' % (swarming, task_id),
    }

  # Some shards weren't triggered. Abort everything.
  if len(tasks) != len(manifests):
    if tasks:
      print >> sys.stderr, 'Not all shards were triggered'
      for task_dict in tasks.itervalues():
        abort_task(swarming, task_dict['task_id'])
    return None

  return tasks

def map_and_run(isolated_hash, storage, cache, leak_temp_dir, root_dir, extra_args):
    """Maps and run the command. Returns metadata about the result."""
    # TODO(maruel): Include performance statistics.
    result = {"exit_code": None, "internal_failure": None, "outputs_ref": None, "version": 1}
    if root_dir:
        if not os.path.isdir(root_dir):
            os.makedirs(root_dir, 0700)
        prefix = u""
    else:
        root_dir = os.path.dirname(cache.cache_dir) if cache.cache_dir else None
        prefix = u"isolated_"
    run_dir = make_temp_dir(prefix + u"run", root_dir)
    out_dir = make_temp_dir(prefix + u"out", root_dir)
    tmp_dir = make_temp_dir(prefix + u"tmp", root_dir)
    try:
        bundle = isolateserver.fetch_isolated(
            isolated_hash=isolated_hash, storage=storage, cache=cache, outdir=run_dir, require_command=True
        )

        change_tree_read_only(run_dir, bundle.read_only)
        cwd = os.path.normpath(os.path.join(run_dir, bundle.relative_cwd))
        command = bundle.command + extra_args
        file_path.ensure_command_has_abs_path(command, cwd)
        result["exit_code"] = run_command(process_command(command, out_dir), cwd, tmp_dir)
    except Exception as e:
        # An internal error occured. Report accordingly so the swarming task will be
        # retried automatically.
        logging.error("internal failure: %s", e)
        result["internal_failure"] = str(e)
        on_error.report(None)
    finally:
        try:
            if leak_temp_dir:
                logging.warning("Deliberately leaking %s for later examination", run_dir)
            else:
                if os.path.isdir(run_dir) and not file_path.rmtree(run_dir):
                    # On Windows rmtree(run_dir) call above has a synchronization effect:
                    # it finishes only when all task child processes terminate (since a
                    # running process locks *.exe file). Examine out_dir only after that
                    # call completes (since child processes may write to out_dir too and
                    # we need to wait for them to finish).
                    print >>sys.stderr, (
                        "Failed to delete the run directory, forcibly failing\n"
                        "the task because of it. No zombie process can outlive a\n"
                        "successful task run and still be marked as successful.\n"
                        "Fix your stuff."
                    )
                    if result["exit_code"] == 0:
                        result["exit_code"] = 1
                if os.path.isdir(tmp_dir) and not file_path.rmtree(tmp_dir):
                    print >>sys.stderr, (
                        "Failed to delete the temporary directory, forcibly failing\n"
                        "the task because of it. No zombie process can outlive a\n"
                        "successful task run and still be marked as successful.\n"
                        "Fix your stuff."
                    )
                    if result["exit_code"] == 0:
                        result["exit_code"] = 1

            # This deletes out_dir if leak_temp_dir is not set.
            result["outputs_ref"], success = delete_and_upload(storage, out_dir, leak_temp_dir)
            if not success and result["exit_code"] == 0:
                result["exit_code"] = 1
        except Exception as e:
            # Swallow any exception in the main finally clause.
            logging.error("Leaking out_dir %s: %s", out_dir, e)
            result["internal_failure"] = str(e)
    return result

def run_tha_test(isolated_hash, storage, cache, extra_args):
  """Downloads the dependencies in the cache, hardlinks them into a temporary
  directory and runs the executable from there.

  A temporary directory is created to hold the output files. The content inside
  this directory will be uploaded back to |storage| packaged as a .isolated
  file.

  Arguments:
    isolated_hash: the sha-1 of the .isolated file that must be retrieved to
                   recreate the tree of files to run the target executable.
    storage: an isolateserver.Storage object to retrieve remote objects. This
             object has a reference to an isolateserver.StorageApi, which does
             the actual I/O.
    cache: an isolateserver.LocalCache to keep from retrieving the same objects
           constantly by caching the objects retrieved. Can be on-disk or
           in-memory.
    extra_args: optional arguments to add to the command stated in the .isolate
                file.
  """
  run_dir = make_temp_dir('run_tha_test', cache.cache_dir)
  out_dir = unicode(make_temp_dir('isolated_out', cache.cache_dir))
  result = 0
  try:
    try:
      settings = isolateserver.fetch_isolated(
          isolated_hash=isolated_hash,
          storage=storage,
          cache=cache,
          outdir=run_dir,
          require_command=True)
    except isolateserver.ConfigError:
      on_error.report(None)
      return 1

    change_tree_read_only(run_dir, settings.read_only)
    cwd = os.path.normpath(os.path.join(run_dir, settings.relative_cwd))
    command = settings.command + extra_args

    # subprocess.call doesn't consider 'cwd' when searching for executable.
    # Yet isolate can specify command relative to 'cwd'. Convert it to absolute
    # path if necessary.
    if not os.path.isabs(command[0]):
      command[0] = os.path.abspath(os.path.join(cwd, command[0]))
    command = process_command(command, out_dir)
    logging.info('Running %s, cwd=%s' % (command, cwd))

    # TODO(csharp): This should be specified somewhere else.
    # TODO(vadimsh): Pass it via 'env_vars' in manifest.
    # Add a rotating log file if one doesn't already exist.
    env = os.environ.copy()
    if MAIN_DIR:
      env.setdefault('RUN_TEST_CASES_LOG_FILE',
          os.path.join(MAIN_DIR, RUN_TEST_CASES_LOG))
    try:
      sys.stdout.flush()
      with tools.Profiler('RunTest'):
        result = subprocess.call(command, cwd=cwd, env=env)
        logging.info(
            'Command finished with exit code %d (%s)',
            result, hex(0xffffffff & result))
    except OSError:
      on_error.report('Failed to run %s; cwd=%s' % (command, cwd))
      result = 1

  finally:
    try:
      try:
        if not rmtree(run_dir):
          print >> sys.stderr, (
              'Failed to delete the temporary directory, forcibly failing the\n'
              'task because of it. No zombie process can outlive a successful\n'
              'task run and still be marked as successful. Fix your stuff.')
          result = result or 1
      except OSError:
        logging.warning('Leaking %s', run_dir)
        result = 1

      # HACK(vadimsh): On Windows rmtree(run_dir) call above has
      # a synchronization effect: it finishes only when all task child processes
      # terminate (since a running process locks *.exe file). Examine out_dir
      # only after that call completes (since child processes may
      # write to out_dir too and we need to wait for them to finish).

      # Upload out_dir and generate a .isolated file out of this directory.
      # It is only done if files were written in the directory.
      if os.listdir(out_dir):
        with tools.Profiler('ArchiveOutput'):
          results = isolateserver.archive_files_to_storage(
              storage, [out_dir], None)
        # TODO(maruel): Implement side-channel to publish this information.
        output_data = {
          'hash': results[0][0],
          'namespace': storage.namespace,
          'storage': storage.location,
        }
        sys.stdout.flush()
        print(
            '[run_isolated_out_hack]%s[/run_isolated_out_hack]' %
            tools.format_json(output_data, dense=True))
#.........这里部分代码省略.........