# Copyright 2019 The Chromium Authors
# Use of this source code is governed by a BSD-style license that can be
# found in the LICENSE file.

"""Helper script for use by GN to encode/decode proto files. The protoc tool
requires using stdin/stdout for the --encode/--decode options, but that form
of processing is not supported by GN.
"""

import argparse
import subprocess


def Main():
  parser = argparse.ArgumentParser()
  parser.add_argument('--protoc', help='Path to protoc compiler.')
  parser.add_argument(
    '--infile',
    required=True,
    help='Path to input file that will be used as stdin.',
  )
  parser.add_argument(
    '--outfile',
    required=True,
    help='Path to output file that will be used as stdout.',
  )
  args, passthrough_args = parser.parse_known_args()

  stdin = open(args.infile, 'r')
  stdout = open(args.outfile, 'w')

  subprocess.check_call(
    [args.protoc] + passthrough_args, stdin=stdin, stdout=stdout
  )


if __name__ == '__main__':
  Main()