Function getAvailablePort

lib/getPort.js:62–85

(port, hosts)

 * @returns {Promise<number>} resolved port
 */
const getAvailablePort = async (port, hosts) => {
  /**
   * Errors that mean that host is not available.
   * @type {Set<string | undefined>}
   */
  const nonExistentInterfaceErrors = new Set(["EADDRNOTAVAIL", "EINVAL"]);
  /* Check if the post is available on every local host name */
  for (const host of hosts) {
    try {
      await checkAvailablePort(port, host);
    } catch (error) {
      /* We throw an error only if the interface exists */
      if (
        !nonExistentInterfaceErrors.has(
          /** @type {NodeJS.ErrnoException} */ (error).code,
        )
      ) {
        throw error;
      }
    }
  }

  return port;
};

/**
 * @param {number} basePort base port