old_contents: # Copyright 2015 The Bazel Authors. All rights reserved.
  #
  # 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.
  """A wrapper to have a portable SHA-256 tool."""
  
  # TODO(dmarting): instead of this tool we should make SHA-256 of artifacts
  # available in Skylark.
  import hashlib
  import sys
  
  if __name__ == "__main__":
    if len(sys.argv) != 3:
      print "Usage: %s input output" % sys.argv[0]
      sys.exit(-1)
    with open(sys.argv[2], "w") as outputfile:
      with open(sys.argv[1], "rb") as inputfile:
        outputfile.write(hashlib.sha256(inputfile.read()).hexdigest())
  
new_contents: # Copyright 2015 The Bazel Authors. All rights reserved.
  #
  # 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.
  """A wrapper to have a portable SHA-256 tool."""
  
  # TODO(dmarting): instead of this tool we should make SHA-256 of artifacts
  # available in Skylark.
  import hashlib
  import sys
  
  if __name__ == "__main__":
    if len(sys.argv) != 3:
      # pylint: disable=superfluous-parens
      print("Usage: %s input output" % sys.argv[0])
      sys.exit(-1)
    with open(sys.argv[2], "w") as outputfile:
      with open(sys.argv[1], "rb") as inputfile:
        outputfile.write(hashlib.sha256(inputfile.read()).hexdigest())
  
subject: Make tools/build_defs/hash/sha256.py py3 compatible