text: # Copyright (c) Facebook, Inc. and its affiliates.
  #
  # Licensed under the Apache License, Version 2.0 (the "License");
  # you may not use this file except in compliance with the License.
  # You may obtain a copy of the License at
  #
  #     http://www.apache.org/licenses/LICENSE-2.0
  #
  # Unless required by applicable law or agreed to in writing, software
  # distributed under the License is distributed on an "AS IS" BASIS,
  # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  # See the License for the specific language governing permissions and
  # limitations under the License.
  
  # Portable simple implementation of `touch`
  
  # no unicode literals
  from __future__ import absolute_import, division, print_function
  
  import errno
  import os
  import sys
  
  
  fname = sys.argv[1]
  
  try:
      os.utime(fname, None)
  except OSError as e:
      if e.errno == errno.ENOENT:
          with open(fname, "a"):
              os.utime(fname, None)
      else:
          raise
  