nodejs package.json详细解读


 package.json详细内容

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它是这样一个json文件(注意:json文件内是不能写注释的,复制下列内容请删除注释):
JavaScript

{
  "name": "test",   //项目名称(必须)
  "version": "1.0.0",   //项目版本(必须)
  "description": "This is for study gulp project !",   //项目描述(必须)
  "homepage": "",   //项目主页
  "repository": {    //项目资源库
    "type": "git",
    "url": "https://git.oschina.net/xxxx"
  },
  "author": {    //项目作者信息
    "name": "surging",
    "email": "surging2@qq.com"
  },
  "license": "ISC",    //项目许可协议
  "devDependencies": {    //项目依赖的插件
    "gulp": "^3.8.11",
    "gulp-less": "^3.0.0"
  }
}
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使用 package.json

package.json 位于模块的目录下,用于定义包的属性。接下来让我们来看下 express 包的 package.json 文件,位于 node_modules/express/package.json 内容:

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{
  "name": "express",
  "description": "Fast, unopinionated, minimalist web framework",
  "version": "4.13.3",
  "author": {
    "name": "TJ Holowaychuk",
    "email": "tj@vision-media.ca"
  },
  "contributors": [
    {
      "name": "Aaron Heckmann",
      "email": "aaron.heckmann+github@gmail.com"
    },
    {
      "name": "Ciaran Jessup",
      "email": "ciaranj@gmail.com"
    },
    {
      "name": "Douglas Christopher Wilson",
      "email": "doug@somethingdoug.com"
    },
    {
      "name": "Guillermo Rauch",
      "email": "rauchg@gmail.com"
    },
    {
      "name": "Jonathan Ong",
      "email": "me@jongleberry.com"
    },
    {
      "name": "Roman Shtylman",
      "email": "shtylman+expressjs@gmail.com"
    },
    {
      "name": "Young Jae Sim",
      "email": "hanul@hanul.me"
    }
  ],
  "license": "MIT",
  "repository": {
    "type": "git",
    "url": "git+https://github.com/strongloop/express.git"
  },
  "homepage": "http://expressjs.com/",
  "keywords": [
    "express",
    "framework",
    "sinatra",
    "web",
    "rest",
    "restful",
    "router",
    "app",
    "api"
  ],
  "dependencies": {
    "accepts": "~1.2.12",
    "array-flatten": "1.1.1",
    "content-disposition": "0.5.0",
    "content-type": "~1.0.1",
    "cookie": "0.1.3",
    "cookie-signature": "1.0.6",
    "debug": "~2.2.0",
    "depd": "~1.0.1",
    "escape-html": "1.0.2",
    "etag": "~1.7.0",
    "finalhandler": "0.4.0",
    "fresh": "0.3.0",
    "merge-descriptors": "1.0.0",
    "methods": "~1.1.1",
    "on-finished": "~2.3.0",
    "parseurl": "~1.3.0",
    "path-to-regexp": "0.1.7",
    "proxy-addr": "~1.0.8",
    "qs": "4.0.0",
    "range-parser": "~1.0.2",
    "send": "0.13.0",
    "serve-static": "~1.10.0",
    "type-is": "~1.6.6",
    "utils-merge": "1.0.0",
    "vary": "~1.0.1"
  },
  "devDependencies": {
    "after": "0.8.1",
    "ejs": "2.3.3",
    "istanbul": "0.3.17",
    "marked": "0.3.5",
    "mocha": "2.2.5",
    "should": "7.0.2",
    "supertest": "1.0.1",
    "body-parser": "~1.13.3",
    "connect-redis": "~2.4.1",
    "cookie-parser": "~1.3.5",
    "cookie-session": "~1.2.0",
    "express-session": "~1.11.3",
    "jade": "~1.11.0",
    "method-override": "~2.3.5",
    "morgan": "~1.6.1",
    "multiparty": "~4.1.2",
    "vhost": "~3.0.1"
  },
  "engines": {
    "node": ">= 0.10.0"
  },
  "files": [
    "LICENSE",
    "History.md",
    "Readme.md",
    "index.js",
    "lib/"
  ],
  "scripts":{"test":"mocha --require test/support/env --reporter spec --bail --check-leaks test/ test/acceptance/","test-ci":"istanbul cover node_modules/mocha/bin/_mocha --report lcovonly -- --require test/support/env --reporter spec --check-leaks test/ test/acceptance/","test-cov":"istanbul cover node_modules/mocha/bin/_mocha -- --require test/support/env --reporter dot --check-leaks test/ test/acceptance/","test-tap":"mocha --require test/support/env --reporter tap --check-leaks test/ test/acceptance/"},"gitHead":"ef7ad681b245fba023843ce94f6bcb8e275bbb8e","bugs":{"url":"https://github.com/strongloop/express/issues"},"_id":"express@4.13.3","_shasum":"ddb2f1fb4502bf33598d2b032b037960ca6c80a3","_from":"express@*","_npmVersion":"1.4.28","_npmUser":{"name":"dougwilson","email":"doug@somethingdoug.com"},"maintainers":[{"name":"tjholowaychuk","email":"tj@vision-media.ca"},{"name":"jongleberry","email":"jonathanrichardong@gmail.com"},{"name":"dougwilson","email":"doug@somethingdoug.com"},{"name":"rfeng","email":"enjoyjava@gmail.com"},{"name":"aredridel","email":"aredridel@dinhe.net"},{"name":"strongloop","email":"callback@strongloop.com"},{"name":"defunctzombie","email":"shtylman@gmail.com"}],"dist":{"shasum":"ddb2f1fb4502bf33598d2b032b037960ca6c80a3","tarball":"http://registry.npmjs.org/express/-/express-4.13.3.tgz"},"directories":{},"_resolved":"https://registry.npmjs.org/express/-/express-4.13.3.tgz","readme":"ERROR: No README data found!"}
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Package.json 属性说明

  • name - 包名。

  • version - 包的版本号。

  • description - 包的描述。

  • homepage - 包的官网 url 。

  • author - 包的作者姓名。

  • contributors - 包的其他贡献者姓名。

  • dependencies - 依赖包列表。如果依赖包没有安装,npm 会自动将依赖包安装在 node_module 目录下。

  • repository - 包代码存放的地方的类型,可以是 git 或 svn,git 可在 Github 上。

  • main - main 字段是一个模块ID,它是一个指向你程序的主要项目。就是说,如果你包的名字叫 express,然后用户安装它,然后require("express")。

  • keywords - 关键字

 

 

2. package.json
在前面例子中的 somepackage 文件夹下,我们创建一个叫做 package.json 的文件,内容如
下所示:
{
"main" : "./lib/interface.js"
}
然后将 index.js 重命名为 interface.js 并放入 lib 子文件夹下。以同样的方式再次调用这个
包,依然可以正常使用。
Node.js 在调用某个包时,会首先检查包中 package.json 文件的 main 字段,将其作为
包的接口模块,如果 package.json 或 main 字段不存在,会尝试寻找 index.js 或 index.node 
为包的接口。
package.json 是 CommonJS 规定的用来描述包的文件,完全符合规范的 package.json 
件应该含有以下字段。
 name:包的名称,必须是唯一的,由小写英文字母、数字和下划线组成,不能包含
空格。
 description:包的简要说明。
 version:符合语义化版本识别规范的版本字符串。
 keywords:关键字数组,通常用于搜索。
 maintainers:维护者数组,每个元素要包含 name、 email (可选)、 web (可选)
字段。
 contributors:贡献者数组,格式与maintainers相同。包的作者应该是贡献者
数组的第一个元素。
 bugs:提交bug的地址,可以是网址或者电子邮件地址。
 licenses:许可证数组,每个元素要包含 type (许可证的名称)和 url (链接到
许可证文本的地址)字段。
 repositories:仓库托管地址数组,每个元素要包含 type(仓库的类型,如 git )、
url (仓库的地址)和 path (相对于仓库的路径,可选)字段。
——————————
① 语义化版本识别Semantic Versioning)是由 Gravatars 和 GitHub 创始人 Tom Preston-Werner 提出的一套版本命名
规范,最初目的是解决各式各样版本号大小比较的问题,目前被许多包管理系统所采用。
40 第 章 Node.js 快速入门
 dependencies:包的依赖,一个关联数组,由包名称和版本号组成。
下面是一个完全符合 CommonJS 规范的 package.json 示例:

{
"name": "mypackage",
"description": "Sample package for CommonJS. This package demonstrates the required
elements of a CommonJS package.",
"version": "0.7.0",
"keywords": [
"package",
"example"
],
"maintainers": [
{
"name": "Bill Smith",
"email": "bills@example.com",
}
],
"contributors": [
{
"name": "BYVoid",
"web": "http://www.byvoid.com/"
}
],
"bugs": {
"mail": "dev@example.com",
"web": "http://www.example.com/bugs"
},
"licenses": [
{
"type": "GPLv2",
"url": "http://www.example.org/licenses/gpl.html"
}
],
"repositories": [
{
"type": "git",
"url": "http://github.com/BYVoid/mypackage.git"
}
],
"dependencies": {
"webkit": "1.2",
"ssl": {
"gnutls": ["1.0", "2.0"],
"openssl": "0.9.8"
}

 

 

 

posted @ 2020-06-10 11:18  crazy_boy  阅读(1291)  评论(0编辑  收藏  举报