使用npm来安装或更新必需的包，就像用于rubygem的bundler一样 [英] Using npm to install or update required packages just like bundler for rubygems

问题描述

我喜欢 Bundler ，它非常适合依赖关系管理。我喜欢 npm ，安装节点包很容易！我有一个nodejs应用程序，并希望能够指定我的应用程序依赖关系，并轻松地安装/更新他们，无论我在哪里部署我的应用程序。这不是我发布的图书馆，它是一个完整的网络应用程序。

I love Bundler, it's great at dependency management. I love npm, installing node packages is easy! I have a nodejs app and would love to be able to specify my apps dependencies and easily install / update them wherever I deploy my app. This isn't a library I'm releasing, it's a full fledged web-app.

我知道 npm bundle 命令，但这似乎只是覆盖安装软件包的目录。

I'm aware of the npm bundle command, but that just seems to simply override the directory where packages are installed.

我习惯于以这种方式使用bundler：

I'm used to using bundler in this fashion:

# Gemfile
gem "rails", "3.0.3"

只有在主机上尚不存在，才能在主机上安装rails v3.0.3和任何其他所需的gem。

Installs rails v3.0.3 and any other required gems on the host machine only if it doesn't already exist

> bundle install

如何实现与npm类似的东西？

推荐答案

从npm 1.0开始（现在，如果您按照README文件中的步骤，默认情况下可以获得），bundle不再是隔离的东西 - 这只是如何运作。

As of npm 1.0 (which is now what you get by default if you follow the steps in the README file), "bundle" is no longer a segregated thing -- it's just "how it works".

所以：

1. 将 package.json 文件放在项目的根目录中



2. 在该文件中列出您的deps

1. Put a package.json file in the root of your project

2. List your deps in that file

{ "name" : "my-project"
, "version" : "1.0.0"
, "dependencies" : { "express" : "1.0.0" } }

npm install 由于您没有参与调用，而不是全局模式，所以只需在本地安装所有的deps。

npm install Since you're calling this with no args, and not in global mode, it'll just install all your deps locally.

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