如何在package.json中添加多个NODE_PATH?

时间:2017-08-26 08:31:14

标签: node.js package.json

如何在package.json中添加多个NODE_PATH?

我希望拥有以下多条路径:

NODE_PATH=./ NODE_PATH=./modules/

NODE_PATH=./lib NODE_PATH=./modules/

的package.json:

{
  "name": "my-app",
  "description": "env",
  "repository": "https://github.com/xxx.git",
  "scripts": {
    "dev": "NODE_PATH=./lib NODE_PATH=./ node server.js",
    "start": "cross-env NODE_ENV=production NODE_PATH=./ NODE_PATH=./modules/ nodemon --exec babel-node --presets es2015 server.js"
  },
  "dependencies": {
    "cross-env": "^5.0.5",
    "express": "^4.15.4"
  },
  "license": "MIT"
}

server.js:

'use strict'

import express from 'express'
import sample from 'lib/sample'
import config from 'lib'

const app = express()
const isProd = (process.env.NODE_ENV === 'production')
const port = process.env.PORT || 3000
console.log(isProd)
console.log(sample)
console.log(config)

app.get('/', function (req, res) {
  const data = {message: 'Hello World!'}
  console.log(data);
  return res.status(200).json(data);
})

app.listen(port, function () {
  console.log('listening on port 3000!')
})

错误:

  

错误:找不到模块'lib / sample'

有什么想法吗?

1 个答案:

答案 0 :(得分:8)

您在示例中使用 NODE_PATH 的方式,通过设置两次,您将覆盖第二次首先分配的值。

相反,将 NODE_PATH 设置为多个路径,由冒号(在MacOS或Linux上)或分号(Windows)分隔,如下所示:

{
    "name": "my-app",
    "description": "env",
    "repository": "https://github.com/xxx.git",
    "scripts": {
        "dev": "NODE_PATH=./lib:./ node server.js",
        "start": "cross-env NODE_ENV=production NODE_PATH=./:./modules/ nodemon --exec babel-node --presets es2015 server.js"
    },
    "dependencies": {
        "cross-env": "^5.0.5",
       "express": "^4.15.4"
    },
    "license": "MIT"
}

请参阅Node.js文档:

https://nodejs.org/api/modules.html#modules_loading_from_the_global_folders