#!/usr/bin/env vpython3
# Copyright 2020 The ChromiumOS Authors
# Use of this source code is governed by a BSD-style license that can be
# found in the LICENSE file.
"""Filters a ConfigBundle based on PublicReplication messages."""

import argparse

from checker import io_utils
from chromiumos.config.payload import config_bundle_pb2
from common import proto_utils


def argument_parser():
  """Returns an ArgumentParser for the script."""
  parser = argparse.ArgumentParser(description=__doc__)
  parser.add_argument(
      '--input',
      required=True,
      help=('Path to the private config json proto e.g. '
            '.../chromiumos/src/project/project1/generated/config.jsonproto.'),
      metavar='PATH')
  parser.add_argument(
      '--output',
      required=True,
      help=('Path to the output the filtered public json proto. Note that if '
            'filtering for public fields produces an empty ConfigBundle, no '
            'output is written.'),
      metavar='PATH')
  return parser


def main():
  """Runs the script."""
  parser = argument_parser()
  args = parser.parse_args()

  private_config = io_utils.read_config(args.input)
  public_config = config_bundle_pb2.ConfigBundle()

  proto_utils.apply_public_replication(private_config, public_config)

  # Skip writing an empty ConfigBundle.
  if public_config != config_bundle_pb2.ConfigBundle():
    io_utils.write_message_json(public_config, args.output)
  else:
    print(
        'Filtering for public fields produced an empty ConfigBundle, skipping '
        'writing output.')


if __name__ == '__main__':
  main()