npm 依赖安装，困惑 [英] npm dependancies installation, confused

问题描述

我安装了两个 node.js/npm ，一个是 1.4.28，一个是 3.1.0

I've two installations of node.js/npm , one is 1.4.28 and one is 3.1.0

通过使用包含以下内容的 package.json 文件部署相同的应用程序:

by deploying the same app with the package.json file containing:

    {
  "name": "server",
  "version": "0.0.1",
  "description": "js server",
  "dependencies": {
    "async": "^1.3.0",
    "aws-sdk": "^2.1.36",
    "body-parser": "^1.13.2",
    "ejs": "^2.3.2",
    "express": "^4.13.1",
    "generic-pool": "^2.2.0",
    "multer": "^0.1.8",
    "mysql": "^2.7.0",
    "node-uuid": "^1.4.3",
    "nodemailer": "^1.4.0",
    "nodemailer-smtp-transport": "^1.0.3",
    "password-hash-and-salt": "^0.1.2",
    "pm2": "^0.14.3",
    "redis": "^0.12.1",
    "redis-sessions": "^0.3.9",
    "request": "^2.58.0",
    "socket.io": "^1.3.5",
    "winston": "^1.0.1",
    "yauzl": "^2.3.1"
  }
}

在版本 1.4.28 上，在没有任何 node_modules 目录的全新安装上运行 npm install 后，如果填充了正确的必需模块:

on the version 1.4.28 , after running npm install on a fresh installation without any node_modules directory, if fills with the correct required modules:

在 3.1.0 版本中，我得到了大量我认为不需要的子依赖项:

while on the version 3.1.0 I get tons of subdependancies that should not been needed in my opinion:

所以任何人都可以向我解释发生了什么以及为什么我将所有这些 deps 拉进来?我也试过 --production what 在 npm 上没有成功...

So anyone could explain me what's going on and why I get all those deps pulled in ? I've also tried with --production what on npm with no success...

非常感谢！

推荐答案

这是 npm 3.* 的新功能.来自 npm 博客:

It's new npm 3.* feature. From npm blog:

使用 npm@3，您的 node_modules 目录会更加平坦.所有的您的依赖项和大多数子依赖项(和(sub)+dependencies) 将在顶部彼此相邻等级.只有当有冲突时才会安装模块更深层次.对于 Windows 用户来说，这应该会让事情变得更容易.

With npm@3, your node_modules directory will be a lot flatter. All of your dependencies and most of your subdependencies (and (sub)+dependencies) will be sitting next to each other at the top level. Only when there are conflicts will modules be installed at deeper levels. This should make things a lot easier for Windows users.

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