code: def daemon(args):
      
      if os.environ.get(DVC_DAEMON):
          logger.debug("skipping launching a new daemon.")
          return
  
      cmd = [sys.executable]
      if not is_binary():
          cmd += ["-m", "dvc"]
      cmd += ["daemon", "-q"] + args
  
      env = fix_env()
      file_path = os.path.abspath(inspect.stack()[0][1])
      env[cast_bytes_py2("PYTHONPATH")] = cast_bytes_py2(
          os.path.dirname(os.path.dirname(file_path))
      )
      env[cast_bytes_py2(DVC_DAEMON)] = cast_bytes_py2("1")
  
      _spawn(cmd, env)
docs: Launch a `dvc daemon` command in a detached process.
  
      Args:
          args (list): list of arguments to append to `dvc daemon` command.