common/devtools/convert_protocol_to_json.py

#!/usr/bin/env python
# Copyright 2017 The Chromium Authors. All rights reserved.
# Use of this source code is governed by a BSD-style license that can be
# found in the LICENSE file.

import argparse
import json
import os.path
import sys

import pdl


def main(argv):
    parser = argparse.ArgumentParser(description=("Converts from .pdl to .json by invoking the pdl Python module."))
    parser.add_argument(
        "--map_binary_to_string",
        type=bool,
        help=(
            "If set, binary in the .pdl is mapped to a "
            "string in .json. Client code will have to "
            "base64 decode the string to get the payload."
        ),
    )
    parser.add_argument("pdl_file", help="The .pdl input file to parse.")
    parser.add_argument("json_file", help="The .json output file write.")
    args = parser.parse_args(argv)
    file_name = os.path.normpath(args.pdl_file)
    with open(file_name) as input_file:
        pdl_string = input_file.read()

    protocol = pdl.loads(pdl_string, file_name, args.map_binary_to_string)

    with open(os.path.normpath(args.json_file), "w") as output_file:
        json.dump(protocol, output_file, indent=4, separators=(",", ": "))


if __name__ == "__main__":
    sys.exit(main(sys.argv[1:]))