generator-option-type

index.js

'use strict';

var Base = require('yeoman-generator');

module.exports = Base.extend({
  constructor() {
    Base.apply(this, arguments);

    this.option('aBoolOpt', {
      type: Boolean
    });
  }

  , initializing: {
    doIt: function doIt() {
      console.log('typeof aBoolOpt: ' + (typeof this.options.aBoolOpt));
    }
  }
});

$ yo option-type

results in

/home/phil/.nvm/versions/node/v6.7.0/lib/node_modules/yo/node_modules/yeoman-environment/lib/environment.js:336
  return new Generator(args, opts);
         ^

TypeError: Generator is not a constructor
    at Environment.instantiate (/home/phil/.nvm/versions/node/v6.7.0/lib/node_modules/yo/node_modules/yeoman-environment/lib/environment.js:336:10)
    at Environment.create (/home/phil/.nvm/versions/node/v6.7.0/lib/node_modules/yo/node_modules/yeoman-environment/lib/environment.js:313:15)
    at Environment.run (/home/phil/.nvm/versions/node/v6.7.0/lib/node_modules/yo/node_modules/yeoman-environment/lib/environment.js:372:24)
    at /home/phil/.nvm/versions/node/v6.7.0/lib/node_modules/yo/lib/cli.js:140:11
    at Array.forEach (native)
    at /home/phil/.nvm/versions/node/v6.7.0/lib/node_modules/yo/lib/cli.js:139:9
    at Environment.resolver.lookup (/home/phil/.nvm/versions/node/v6.7.0/lib/node_modules/yo/node_modules/yeoman-environment/lib/resolver.js:50:12)
    at init (/home/phil/.nvm/versions/node/v6.7.0/lib/node_modules/yo/lib/cli.js:115:7)
    at pre (/home/phil/.nvm/versions/node/v6.7.0/lib/node_modules/yo/lib/cli.js:73:3)
    at Object.<anonymous> (/home/phil/.nvm/versions/node/v6.7.0/lib/node_modules/yo/lib/cli.js:194:3)

I've got the same issue, turns out that we cannot use both ES6's object method shorthand and arrow functions as a constructor. 😞

https://stackoverflow.com/a/45119651/2013891