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前言
有一种技术可以提高我们的工作效率，可以让我们专心做我们擅长的事，可以屏蔽复杂性，可以规范我们的架构和我们的代码，可以让我们的享受编程的乐趣。Yeoman可以做到。
很多年以前，rails刚刚出世，伴随着一个新的名词“脚手架(scaffolding)”出现了。脚手架是一种提高开发效率的工具的代名词。随后，各种编程语言都开始实现自己的“脚手架”工具。Maven重新构造了Java的世界，改变了几千万的开发者对于Java项目构建的认识。Yeoman在Javascript领域正做着同样的事情。
看着各种工具，各种语言，都在飞跃式的进化。做为一个开发者，我每天都在为变化而惊喜！
目录
Yeoman是Google的团队和外部贡献者团队合作开发的，他的目标是通过Grunt（一个用于开发任务自动化的命令行工具）和Bower（一个HTML、CSS、Javascript和图片等前端资源的包管理器）的包装为开发者创建一个易用的工作流。
Yeoman主要有三部分组成：yo（脚手架工具）、grunt（构建工具）、bower（包管理器）。这三个工具是分别独立开发的，但是需要配合使用，来实现我们高效的工作流模式。
yo插件都是通过npm, Node.js包管理器安装和管理的.
我的系统环境
~ D:\workspace\javascript>node -v
v0.10.5
~ D:\workspace\javascript>npm -v
1.2.19
在系统中，我们已经安装好了Nodejs和npm。win7安装nodejs请参考文章：Nodejs开发框架Express3.0开发手记–从零开始
全局安装yo
~ D:\workspace\javascript>npm install -g yo如果你还没有安装grunt,bower，也需要一起安装
~ D:\workspace\javascript>npm install -g grunt-cli bower接下我们看一下yo命令行操作
1). 通过help查看帮助
~ D:\workspace\javascript>yo --help
Yeoman is a mask worn by the following members of the open-source community:
Paul Irish, Addy Osmani, Mickael Daniel, Sindre Sorhus, Eric Bidelman,
Frederick Ros, Brian Ford, Pascal Hartig, Stephen Sawchuk, and countless
other contributors.
Usage: yo GENERATOR [args] [options]
General options:
-h, --help # Print generator‘s options and usage
-f, --force # Overwrite files that already exist
Please choose a generator below.
Angular
angular:app
angular:common
angular:constant
angular:controller
angular:decorator
angular:directive
angular:factory
angular:filter
angular:main
angular:provider
angular:route
angular:service
angular:value
angular:view
Karma
karma:app
Mocha
mocha:app
mocha:generator
Webapp
webapp:app
yo的命令很简单：yo GENERATOR，例如：yo webapp， yo angular
Please choose a generator below: 下面列出了我的系统中，已经安装的generator的库，例如：Angular，Karma，Mocha，Webapp
2). 查询yo的支持库
~ D:\workspace\javascript>yo
Yeoman is a mask worn by the following members of the open-source community:
Paul Irish, Addy Osmani, Mickael Daniel, Sindre Sorhus, Eric Bidelman,
Frederick Ros, Brian Ford, Pascal Hartig, Stephen Sawchuk, and countless
other contributors.
[?] What would you like to do? (Use arrow keys)
> Install a generator
Find some help
Get me out of here!
命令行会提示，我们想要的操作。这里选择”Install a generator”
[?] What would you like to do? Install a generator
[?] Search NPM for generators:web
系统继续提示，我们要查找的包，我们输入web
3). 安装generator-webapp库
[?] Here‘s what I found. Install one? (Use arrow keys)
> generator-armadillo
generator-bones
generator-btapp
generator-fe
generator-flight
generator-hazdev-webapp
generator-hbswebapp
generator-html5-site
generator-jing
generator-lessapp
generator-nodestrap
generator-sails
generator-server-configs
generator-starter
generator-starttter
generator-ultimate
generator-webapp
generator-webapp-bfytw
generator-webapp-fintan
generator-weblog
generator-website
Search again
Return home
yo列出了，所有在官方已经注册的，web关键字相关的包，我们选择“generator-webapp”
yo通过npm开始下载generator-webapp安装包
[?] What would you like to do? Install a generator
[?] Search NPM for generators: web
[?] Here‘s what I found. Install one? generator-webapp
generator-webapp@0.2.7 D:\toolkit\nodejs\node_modules\generator-webapp
├── cheerio@0.12.1 (entities@0.3.0, underscore@1.4.4, htmlparser2@3.1.4, cheerio-select@0.0.3)
└── yeoman-generator@0.12.3 (dargs@0.1.0, diff@1.0.5, debug@0.7.2, async@0.2.9, mime@1.2.11, mkdirp@0.3.5, isbinaryfi
le@0.1.9, underscore.string@2.3.3, shelljs@0.1.4, iconv-lite@0.2.11, lodash@1.3.1, rimraf@2.1.4, nopt@2.1.2, cli-table@0
.2.0, tar@0.1.18, glob@3.2.6, inquirer@0.2.4, request@2.21.0)
I just installed your generator by running:
npm install -g generator-webapp
然后，我们退出yo命令行，选择“Get me out of here!”
[?] What would you like to do? Get me out of here!
Bye from us! Chat soon.
Addy Osmani
Sindre Sorhus
Brian Ford
Eric Bidelman
Paul Irish
Mickael Daniel
Pasca1 Hartig
Stephen S.wchuk
Frederick R0s
上面的退出的文字是开发者的名字，很有意思一点是，竖着看最中间一行的文字排列是，yeoman1.0，也就是yeoman这个项目的得名了。
4). 注：上面的过程，也可以直接用命令
npm install -g generator-webapp当我们安装了generator-webapp后，我们就可以，以非常优雅的方式来构建工程了。
1). 创建nodejs-yo目录，并构建webapp工程
~ D:\workspace\javascript>mkdir nodejs-yo
~ D:\workspace\javascript>cd nodejs-yo
~ D:\workspace\javascript\nodejs-yo>yo webapp
_-----_
| |
|--(o)--| .--------------------------.
`---------´ | Welcome to Yeoman, |
( _´U`_ ) | ladies and gentlemen! |
/___A___\ ‘__________________________‘
| ~ |
__‘.___.‘__
´ ` |° ´ Y `
Out of the box I include HTML5 Boilerplate, jQuery and Modernizr.
[?] What more would you like?
[ ] Twitter Bootstrap for Sass
>[X] RequireJS
[X] Autoprefixer for your CSS
对选项的解释：
上面3个选择，由于Sass是基于Ruby的，我本机没有安装ruby，取消Twitter Bootstrap for Sass的勾选。
2). 查看安装日志：
Out of the box I include HTML5 Boilerplate, jQuery and Modernizr.
[?] What more would you like? RequireJS, Autoprefixer for your CSS
create Gruntfile.js
create package.json
create .gitignore
create .gitattributes
create .bowerrc
create bower.json
create .jshintrc
create .editorconfig
create app/favicon.ico
create app/404.html
create app/robots.txt
create app/.htaccess
create app/styles/main.css
create app/scripts/app.js
create app/scripts/main.js
create app/index.html
create app/scripts/hello.coffee
invoke mocha:app
create test\index.html
create test\lib\chai.js
create test\lib\expect.js
create test\lib\mocha\mocha.css
create test\lib\mocha\mocha.js
create test\spec\test.js
I‘m all done. Running bower install & npm install for you to install the required dependencies. If this fails, try running the command yourself.
项目骨架已经建好了。还包括了很多的配置文件.gitignore,bower.json,Gruntfile.js,favicon.ico, robots.txt, .htaccess。太神奇了，Cool!!
一下子装备都齐全了，打仗的事就交给我们自己吧。
有关bower的介绍，请参考：bower解决js的依赖管理
有关grunt的介绍，请参考：grunt让Nodejs规范起来
1). 使用bower命令查看项目依赖：
~ D:\workspace\javascript\nodejs-yo>bower list
bower check-new Checking for new versions of the project dependencies..
nodejs-yo#0.0.0 D:\workspace\javascript\nodejs-yo
├── jquery#1.9.1 (latest is 2.0.3)
├── modernizr#2.6.2
└── requirejs#2.1.8
我们发现生成的webapp中，有4个依赖库，jquery,modernizr,requirejs。
2). 使用grunt命令执行单元测试
D:\workspace\javascript\nodejs-yo>grunt test
Running "clean:server" (clean) task
Cleaning ".tmp"...OK
Running "concurrent:test" (concurrent) task
Running "copy:styles" (copy) task
Running "coffee:dist" (coffee) task
Running "autoprefixer:dist" (autoprefixer) task
File ".tmp/styles/main.css" created.
Running "connect:test" (connect) task
Starting connect web server on localhost:9000.
Running "mocha:all" (mocha) task
Testing: http://localhost:9000/index.html
.
1 test complete (107 ms)
>> 1 passed! (0.11s)
Done, without errors.
3). 使用grunt命令启动一个node服务器
~ D:\workspace\javascript\nodejs-yo>grunt server
Running "server" task
Running "clean:server" (clean) task
Running "concurrent:server" (concurrent) task
Warning: Running "compass:dist" (compass) task
Warning: You need to have Ruby and Compass installed and in your system PATH for this task to work. More info: https://g
ithub.com/gruntjs/grunt-contrib-compass Use --force to continue. Use --force to continue.
Aborted due to warnings.
启动时，我们发现报错了。由于我没有装Ruby的环境，所以compass:dist的命令不能运行。
强制启动grunt
~ D:\workspace\javascript\nodejs-yo>grunt server --force
D:\workspace\javascript\nodejs-yo>grunt server --force
Running "server" task
Running "clean:server" (clean) task
Cleaning ".tmp"...OK
Running "concurrent:server" (concurrent) task
Running "coffee:dist" (coffee) task
Warning: Running "compass:dist" (compass) task
Warning: You need to have Ruby and Compass installed and in your system PATH for this task to work. More info: https://
ithub.com/gruntjs/grunt-contrib-compass Use --force to continue. Used --force, continuing.
Running "compass:dist" (compass) task
Warning: You need to have Ruby and Compass installed and in your system PATH for this task to work. More info: https://
ithub.com/gruntjs/grunt-contrib-compass Use --force to continue.
Running "copy:styles" (copy) task
Running "autoprefixer:dist" (autoprefixer) task
File ".tmp/styles/main.css" created.
Running "connect:livereload" (connect) task
Starting connect web server on localhost:9000.
Running "open:server" (open) task
Running "watch" task
Waiting...
后台日志显示了“watch”的task，说明代码文件被监控着，如有修改网页会自动更新。
浏览器被自动打开，http://localhost:9000/
4). 修改app/index.html代码，增加对canvas的检查。
~ vi app/index.html
<script>
window.onload = function () {
if (canvasSupported()) {
alert(‘canvas supported‘);
}
};
function canvasSupported() {
var canvas = document.createElement(‘canvas‘);
return (canvas.getContext && canvas.getContext(‘2d‘));
}
</script>
浏览器显示：
5). 通过bower增加库jquery-pjax
~ D:\workspace\javascript\nodejs-yo>bower install jquery-pjax
bower jquery-pjax#* not-cached git://github.com/defunkt/jquery-pjax.git#*
bower jquery-pjax#* resolve git://github.com/defunkt/jquery-pjax.git#*
bower jquery-pjax#* download https://github.com/defunkt/jquery-pjax/archive/v1.7.3.tar.gz
bower jquery-pjax#* extract archive.tar.gz
bower jquery-pjax#* resolved git://github.com/defunkt/jquery-pjax.git#1.7.3
bower jquery#>=1.8 cached git://github.com/components/jquery.git#2.0.3
bower jquery#>=1.8 validate 2.0.3 against git://github.com/components/jquery.git#>=1.8
bower jquery-pjax#~1.7.3 install jquery-pjax#1.7.3
jquery-pjax#1.7.3 app\bower_components\jquery-pjax
└── jquery#2.0.3
~ D:\workspace\javascript\nodejs-yo>bower list
bower check-new Checking for new versions of the project dependencies..
nodejs-yo#0.0.0 D:\workspace\javascript\nodejs-yo
├── jquery#1.9.1 (latest is 2.0.3)
├─┬ jquery-pjax#1.7.3 extraneous
│ └── jquery#1.9.1 (2.0.3 available)
├── modernizr#2.6.2
└── requirejs#2.1.8
Yeoman已经成功地帮助我们打造出一个项目的原型了，接下来我们可以针对自己的项目，自己熟悉的框架组合，构建一个属于自己的骨架模板，并发布到Yeoman的generator库中。
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原文地址：http://www.cnblogs.com/xichao/p/5123897.html
