如何编写 package.json 文件,以便使用“npm install"下载所有依赖项 [英] How to write a package.json file so that all dependencies are downloaded with "npm install"
问题描述
我使用 node.js 编写了一个简单的应用程序.这取决于 express、mongodb 和 mongoose(简单).因此,我创建了一个名为 package.json
的文件并将其放入其中:
I wrote a simple application using node. It depends on express, mongodb and mongoose (easy).
So, I created a file called package.json
and put this in it:
{
"name": "booking-dojo",
"description": "Booking dojo app",
"version": "0.0.1",
"private": true,
"dependencies": {
"express": "3.x",
"mongodb": "*",
"mongoose": "*"
}
}
然后我运行 npm install
,期望 npm 安装这些模块和它们的依赖项.结果令人失望:
I then ran npm install
, expecting npm to install those modules and their dependencies.
The result was disappointing:
booking-dojo@0.0.1 /home/merc/Synced/Development/Bookings/app/server
├─┬ express@3.0.0rc3
│ ├── commander@0.6.1
│ ├─┬ connect@2.4.3
│ │ ├── bytes@0.1.0
│ │ ├── formidable@1.0.11
│ │ ├── pause@0.0.1
│ │ └── qs@0.4.2
│ ├── cookie@0.0.4
│ ├── crc@0.2.0
│ ├── debug@0.7.0
│ ├── fresh@0.1.0
│ ├── methods@0.0.1
│ ├── mkdirp@0.3.3
│ ├── range-parser@0.0.4
│ └─┬ send@0.0.3
│ └── mime@1.2.6
├─┬ mongodb@1.1.4
│ └── bson@0.1.1
└─┬ mongoose@3.0.3
├── hooks@0.2.1
└── ms@0.1.0
我对此感到困惑,因为我知道express
需要jade
(以及更多)和mongoose
需要 mongodb
.
如果我进入 node_modules/jade
并运行 npm install
,主树的结果非常不同:
I am confused by this, as I know that express
needs jade
(and much more), and mongoose
needs mongodb
.
If I go into node_modules/jade
and run npm install
, the result from the main tree is very different:
booking-dojo@0.0.1 /home/merc/Synced/Development/Bookings/app/server
├─┬ express@3.0.0rc3
│ ├── commander@0.6.1
│ ├─┬ connect@2.4.3
│ │ ├── bytes@0.1.0
│ │ ├── formidable@1.0.11
│ │ ├── pause@0.0.1
│ │ └── qs@0.4.2
│ ├─┬ connect-redis@1.4.1
│ │ └─┬ redis@0.7.2
│ │ └── hiredis@0.1.14
│ ├── cookie@0.0.4
│ ├── crc@0.2.0
│ ├── debug@0.7.0
│ ├── ejs@0.8.2
│ ├── fresh@0.1.0
│ ├── github-flavored-markdown@1.0.1
│ ├─┬ hjs@0.0.4
│ │ └── hogan.js@2.0.0
│ ├─┬ jade@0.27.2
│ │ └── mkdirp@0.3.0
│ ├── methods@0.0.1
│ ├── mkdirp@0.3.3
│ ├─┬ mocha@1.4.0
│ │ ├── diff@1.0.2
│ │ ├── growl@1.5.1
│ │ └─┬ jade@0.26.3
│ │ └── mkdirp@0.3.0
│ ├── range-parser@0.0.4
│ ├─┬ send@0.0.3
│ │ └── mime@1.2.6
│ ├── should@1.1.0
│ ├─┬ stylus@0.29.0
│ │ └── cssom@0.2.5
│ └─┬ supertest@0.0.1
│ └─┬ superagent@0.5.0
│ ├── emitter-component@0.0.1
│ ├── formidable@1.0.9
│ ├── mime@1.2.5
│ └── qs@0.4.2
├─┬ mongodb@1.1.4
│ └── bson@0.1.1
└─┬ mongoose@3.0.3
├── hooks@0.2.1
└── ms@0.1.0
所以,express
成长很多.看起来npm install
只是加载一些 子模块的依赖项.
So, express
has grown a lot. It looks like npm install
is only loading some of the dependencies of the sub-modules.
有人可以对此有所了解吗?为什么缺少某些依赖项?难道我做错了什么?(可能)
Can somebody please shed some light on this? Why are some dependencies missing? Am I doing something wrong? (likely)
谢谢!
佣兵.
推荐答案
答案由 Brandon 在对另一个答案的评论中提供:
The answer was provided by Brandon in a comment to another answer:
"另一件需要注意的事情是,如果一个包依赖一个可以在依赖链中进一步解析的模块,它会.例如,因为你的 package.json 中有 mongodb,Mongoose 不需要安装自己的 mongodb. – Brandon Tilley 2 天前
"Another thing to note is that if a package depends on a module that can be resolved further up in the dependency chain, it will. For example, since you have mongodb in your package.json, Mongoose doesn't need to install its own mongodb. – Brandon Tilley 2 days ago
谢谢布兰登!(这就是答案...)
Thank you Brandon! (And this is the answer...)
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