Method prompt

packages/cli/lib/base-generator.js:297–346

* Override the base prompt to skip prompts with default answers * @param questions - One or more questions

(questions)

   * @param questions - One or more questions
   */
  async prompt(questions) {
    // Normalize the questions to be an array
    if (!Array.isArray(questions)) {
      questions = [questions];
    }
    if (!this.options['yes']) {
      if (!process.stdin.isTTY) {
        const msg =
          'The stdin is not a terminal. No prompt is allowed. ' +
          'Use --config to provide answers to required prompts and ' +
          '--yes to skip optional prompts with default answers';
        this.log(chalk.red(msg));
        this.exit(new Error(msg));
        return;
      }
      // Non-express mode, continue to prompt
      debug('Questions', questions);
      const answers = await super.prompt(questions);
      debug('Answers', answers);
      return answers;
    }

    const answers = Object.assign({}, this.options);

    for (const q of questions) {
      let when = q.when;
      if (typeof when === 'function') {
        when = await q.when(answers);
      }
      if (when === false) continue;
      if (this._isQuestionOptional(q)) {
        const answer = await this._getDefaultAnswer(q, answers);
        debug('%s: %j', q.name, answer);
        answers[q.name] = answer;
      } else {
        if (!process.stdin.isTTY) {
          const msg =
            'The stdin is not a terminal. No prompt is allowed. ' +
            `(While resolving a required prompt ${JSON.stringify(q.name)}.)`;
          this.log(chalk.red(msg));
          this.exit(new Error(msg));
          return;
        }
        // Only prompt for non-skipped questions
        const props = await super.prompt([q]);
        Object.assign(answers, props);
      }
    }
    return answers;
  }

  /**
   * Override the usage text by replacing `yo loopback4:` with `lb4 `.