#!/usr/bin/env python3
# Copyright 2020 Google LLC
#
# 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.
#
################################################################################
"""Helper script for parsing custom fuzzing options."""
import configparser
import sys


def parse_options(options_file_path, options_section):
  """Parses the given file and returns options from the given section."""
  parser = configparser.ConfigParser()
  parser.read(options_file_path)

  if not parser.has_section(options_section):
    return None

  options = parser[options_section]

  if options_section == 'libfuzzer':
    options_string = ' '.join(
        '-%s=%s' % (key, value) for key, value in options.items())
  else:
    # Sanitizer options.
    options_string = ':'.join(
        '%s=%s' % (key, value) for key, value in options.items())

  return options_string


def main():
  """Processes the arguments and prints the options in the correct format."""
  if len(sys.argv) < 3:
    sys.stderr.write('Usage: %s <path_to_options_file> <options_section>\n' %
                     sys.argv[0])
    return 1

  options = parse_options(sys.argv[1], sys.argv[2])
  if options is not None:
    print(options)

  return 0


if __name__ == "__main__":
  sys.exit(main())