nodejs打包引用错误

Question

import R from 'ramda'
function useMiddlewares(app) {
 return R.map(R.compose(
   R.map(i => i(app)), // 调用中间件的方法，并且将 app 作为参数传入
   require, // 将中间件引入
   i => `${r('./middlewares')}/${i}` // 获取到中间件目录
 )   
}
useMiddlewares(['general', 'database', 'router'])

上面的代码在开发环境没有问题，但是打包之后在正式环境就会出现下面的错误:

/Users/xuyuechao/Work/other-git-project/nuxt-koa/build/main.js:243
        return !(function webpackMissingModule() { var e = new Error("Cannot find module \".\""); e.code = 'MODULE_NOT_FOUND'; throw e; }());
                                                           ^
Error: Cannot find module "."
    at webpackMissingModule (/Users/xuyuechao/Work/other-git-project/nuxt-koa/build/main.js:243:60)
    at /Users/xuyuechao/Work/other-git-project/nuxt-koa/build/main.js:243:18
    at /Users/xuyuechao/Work/other-git-project/nuxt-koa/node_modules/_ramda@0.23.0@ramda/src/internal/_pipe.js:3:14
    at /Users/xuyuechao/Work/other-git-project/nuxt-koa/node_modules/_ramda@0.23.0@ramda/src/internal/_pipe.js:3:27
    at /Users/xuyuechao/Work/other-git-project/nuxt-koa/node_modules/_ramda@0.23.0@ramda/src/internal/_arity.js:5:45
    at _map (/Users/xuyuechao/Work/other-git-project/nuxt-koa/node_modules/_ramda@0.23.0@ramda/src/internal/_map.js:6:19)
    at map (/Users/xuyuechao/Work/other-git-project/nuxt-koa/node_modules/_ramda@0.23.0@ramda/src/map.js:57:14)
    at /Users/xuyuechao/Work/other-git-project/nuxt-koa/node_modules/_ramda@0.23.0@ramda/src/internal/_dispatchable.js:39:15
    at /Users/xuyuechao/Work/other-git-project/nuxt-koa/node_modules/_ramda@0.23.0@ramda/src/internal/_curry2.js:20:46
    at f1 (/Users/xuyuechao/Work/other-git-project/nuxt-koa/node_modules/_ramda@0.23.0@ramda/src/internal/_curry1.js:17:17)
    at new Server (/Users/xuyuechao/Work/other-git-project/nuxt-koa/build/main.js:228:5)
    at Object.<anonymous> (/Users/xuyuechao/Work/other-git-project/nuxt-koa/build/main.js:306:11)
    at Object.<anonymous> (/Users/xuyuechao/Work/other-git-project/nuxt-koa/build/main.js:308:30)
    at __webpack_require__ (/Users/xuyuechao/Work/other-git-project/nuxt-koa/build/main.js:22:30)
    at module.exports.module.exports.head.title (/Users/xuyuechao/Work/other-git-project/nuxt-koa/build/main.js:68:18)
    at Object.<anonymous> (/Users/xuyuechao/Work/other-git-project/nuxt-koa/build/main.js:3:10)

刚开始以为是打包编译之后将问价名给修改了，所以报错，但是试验过之后发现跟这个没有关系。现在没有思路，各方高手，看看能不能够给提供点思路

补充

我又进行了一番尝试，发现上面的代码可以缩减为:

import { resolve } from 'path'
const r = path => resolve(__dirname, path)
require(r('./middlewares/general'))

错误信息不变，但是当我把上面的代码修改为：

   require('usr/local/middlewares/general')

就没有问题了，也就是说使用r函数组装的路径就不可以，直接使用绝对路径就没有问题。但是为什么开发环境没有问题，正式环境就不行了呢，还是很疑惑？

Answer 1

一个相对目录 一个绝对目录
换句话说 你development和production俩种模式配置有出入