index.js

'use strict';

const logger = require('yeoman-environment/lib/util/log');
const inquirer = require('inquirer');
const events = require('events');
const _ = require('lodash');

const logMethods = [
  'write',
  'writeln',
  'ok',
  'error',
  'skip',
  'force',
  'create',
  'invoke',
  'conflict',
  'identical',
  'info',
  'table'
];

  function DummyPrompt(answers, q) {
  this.answers = answers;
  this.question = q;
}

DummyPrompt.prototype.run = function() {
  let answer = this.answers[this.question.name];
  let isSet;
  switch (this.question.type) {
    case 'list':
      isSet = answer !== undefined;
      break;
    case 'confirm':
      isSet = answer || answer === false;
      break;
    default:
      isSet = !!answer;
  }
  if (!isSet) {
    answer = this.question.default;
    if (answer === undefined && this.question.type === 'confirm') {
      answer = true;
    }
  }
  return Promise.resolve(answer);
};

function AutoAdapter(answers, silent) {
  answers = answers || {};
  this.promptModule = inquirer.createPromptModule();
  Object.keys(this.promptModule.prompts).forEach(function(promptName) {
    this.promptModule.registerPrompt(promptName, DummyPrompt.bind(DummyPrompt, answers));
  }, this);
  if (!silent){
    this.log = logger();
  } else {
    const log = this.log = function(){};
    _.extend(log, events.EventEmitter.prototype);
    logMethods.forEach(function (methodName) {
      log[methodName] = function(){ return log};
    });
  }
}

AutoAdapter.prototype.diff = function() {
  return 'Diff issues, please run manually to resolve';
};

AutoAdapter.prototype.prompt = function(questions, cb) {
  const promise = this.promptModule(questions);
  promise.then(cb || undefined);
  return promise;
};

module.exports = {
  AutoAdapter: AutoAdapter
};