Method env

lib/option.js:120–123

* Set environment variable to check for option value. * * An environment variable is only used if when processed the current option value is * undefined, or the source of the current value is 'default' or 'config' or 'env'. * * @param {string} name * @return {Option}

(name)

   */

  env(name) {
    this.envVar = name;
    return this;
  }

  /**
   * Set the custom handler for processing CLI option arguments into option values.