Merge "Add SetHostToolLocation."

    self.cache_size = None

    self.stash_threshold = 0.8

    self.logfile = None

    self.host_tools = {}

OPTIONS = Options()

  logging.config.dictConfig(config)

def SetHostToolLocation(tool_name, location):

  OPTIONS.host_tools[tool_name] = location

def Run(args, verbose=None, **kwargs):

  """Creates and returns a subprocess.Popen object.

    kwargs['stderr'] = subprocess.STDOUT

  if 'universal_newlines' not in kwargs:

    kwargs['universal_newlines'] = True

  # If explicitly set host tool location before, use that location to avoid

  # PATH violation. Make a copy of args in case client relies on the content

  # of args later.

  if args and args[0] in OPTIONS.host_tools:

    args = args[:]

    args[0] = OPTIONS.host_tools[args[0]]

  # Don't log any if caller explicitly says so.

  if verbose:

    logger.info("  Running: \"%s\"", " ".join(args))