Merge "Try to find host tools in the same directory as the caller" am: 84e9bf1a

def SetHostToolLocation(tool_name, location):

  OPTIONS.host_tools[tool_name] = location

def FindHostToolPath(tool_name):

  """Finds the path to the host tool.

  Args:

    tool_name: name of the tool to find

  Returns:

    path to the tool if found under either one of the host_tools map or under

    the same directory as this binary is located at. If not found, tool_name

    is returned.

  """

  if tool_name in OPTIONS.host_tools:

    return OPTIONS.host_tools[tool_name]

  my_dir = os.path.dirname(os.path.realpath(sys.argv[0]))

  tool_path = os.path.join(my_dir, tool_name)

  if os.path.exists(tool_path):

    return tool_path

  return tool_name

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

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

  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:

  if args:

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

    args = args[:]

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

    args[0] = FindHostToolPath(args[0])

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

  if verbose: