Status Config::parseConfigFromString()

in utils/kvrocks2redis/config.cc [53:116]
56 lines of code
27 McCabe index (conditional complexity)

Status Config::parseConfigFromString(const std::string &input) {
  auto [original_key, value] = GET_OR_RET(ParseConfigLine(input));
  if (original_key.empty()) return Status::OK();

  std::vector<std::string> args = util::Split(value, " \t\r\n");
  auto key = util::ToLower(original_key);
  size_t size = args.size();

  if (size == 1 && key == "daemonize") {
    daemonize = GET_OR_RET(yesnotoi(args[0]).Prefixed("key 'daemonize'"));
  } else if (size == 1 && key == "data-dir") {
    data_dir = args[0];
    if (data_dir.empty()) {
      return {Status::NotOK, "'data-dir' was not specified"};
    }

    if (data_dir.back() != '/') {
      data_dir += "/";
    }
    db_dir = data_dir + "db";
  } else if (size == 1 && key == "output-dir") {
    output_dir = args[0];
    if (output_dir.empty()) {
      return {Status::NotOK, "'output-dir' was not specified"};
    }

    if (output_dir.back() != '/') {
      output_dir += "/";
    }
    pidfile = output_dir + "kvrocks2redis.pid";
    next_seq_file_path = output_dir + "last_next_seq.txt";
  } else if (size == 1 && key == "log-level") {
    for (size_t i = 0; i < kNumLogLevel; i++) {
      if (util::ToLower(args[0]) == kLogLevels[i]) {
        loglevel = kLogLevelVals[i];
        break;
      }
    }
  } else if (size == 1 && key == "pidfile") {
    pidfile = args[0];
  } else if (size == 1 && key == "cluster-enable") {
    // Renamed to cluster-enabled, keeping the old one for compatibility.
    cluster_enabled = GET_OR_RET(yesnotoi(args[0]).Prefixed("key 'cluster-enable'"));
  } else if (size == 1 && key == "cluster-enabled") {
    cluster_enabled = GET_OR_RET(yesnotoi(args[0]).Prefixed("key 'cluster-enabled'"));
  } else if (size >= 2 && strncasecmp(key.data(), "namespace.", 10) == 0) {
    std::string ns = original_key.substr(10);
    if (ns.size() > INT8_MAX) {
      return {Status::NotOK, fmt::format("namespace size exceed limit {}", INT8_MAX)};
    }

    tokens[ns].host = args[0];
    tokens[ns].port = GET_OR_RET(ParseInt<std::uint16_t>(args[1]).Prefixed("kvrocks port number"));

    if (size >= 3) {
      tokens[ns].auth = args[2];
    }
    tokens[ns].db_number = size == 4 ? std::atoi(args[3].c_str()) : 0;
  } else {
    return {Status::NotOK, "unknown configuration directive or wrong number of arguments"};
  }

  return Status::OK();
}