3 #

     3 #

     4 # Copyright 2018 Google LLC.

     4 # Copyright 2018 Google LLC.

     5 #

     5 #

     6 # This software may be used and distributed according to the terms of the

     6 # This software may be used and distributed according to the terms of the

     7 # GNU General Public License version 2 or any later version.

     7 # GNU General Public License version 2 or any later version.

     9 

     8 

    10 import contextlib

     9 import contextlib

    11 import os

    10 import os

    12 

    11 

    13 _pipe = None

    12 _pipe = None