export const parseExactConfigArgument = (arguments_) => {
  if (arguments_.length !== 2 || arguments_[0] !== '--config') {
    throw new Error('Prerender accepts exactly --config <path>.');
  }
  const configPath = arguments_[1];
  if (
    configPath.length === 0 ||
    configPath.startsWith('/') ||
    configPath.includes('\\') ||
    configPath.split('/').some((part) => part === '' || part === '.' || part === '..') ||
    !/^config\/[a-z0-9][a-z0-9._-]*\.json$/u.test(configPath)
  ) {
    throw new Error('Config must be a safe repository-relative JSON path inside config/.');
  }
  return configPath;
};