mip2/lib/utils/meta.js

/**
 * @file get meta.js config data from template
 * @author tracy(qiushidev@gmail.com)
 */

const path = require('path')
const exists = require('fs').existsSync
const getGitUser = require('./git')

module.exports = dir => {
  const metajs = path.join(dir, 'meta.js')
  let opts = {}

  if (exists(metajs)) {
    const req = require(path.resolve(metajs))
    if (req !== Object(req)) {
      throw new Error('meta.js needs to expose an object')
    }
    opts = req
  }

  const author = getGitUser()
  if (author) {
    setDefault(opts, 'author', author)
  }

  return opts
}

/**
 * Set the default value for a prompt question
 *
 * @param {Object} opts meta 信息
 * @param {string} key 键名
 * @param {string} val 键值
 */
function setDefault (opts, key, val) {
  const prompts = opts.prompts || (opts.prompts = {})
  if (!prompts[key] || typeof prompts[key] !== 'object') {
    prompts[key] = {
      'type': 'string',
      'default': val
    }
  } else {
    prompts[key].default = val
  }
}