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                ## 安裝Sass和Compass `sass`基于`Ruby`語言開發而成,因此安裝`sass`前需要[安裝Ruby](http://rubyinstaller.org/downloads)。(注:mac下自帶Ruby無需在安裝Ruby!) window下安裝SASS首先需要安裝`Ruby`,先從官網[下載Ruby](http://rubyinstaller.org/downloads)并安裝。安裝過程中請注意勾選`Add Ruby executables to your PATH`添加到系統環境變量。如下圖: ![](https://box.kancloud.cn/2015-08-04_55c05d4ed0a05.png) 安裝完成后需測試安裝有沒有成功,運行`CMD`輸入以下命令: ~~~ ruby -v //如安裝成功會打印 ruby 2.2.2p95 (2015-04-13 revision 50295) [i386-mingw32] ~~~ 如上已經安裝成功。但因為國內網絡的問題導致`gem`源間歇性中斷因此我們需要更換`gem`源。(使用淘寶的gem源https://ruby.taobao.org/)如下: ~~~ //1.刪除原gem源 gem sources --remove https://rubygems.org/ //2.添加國內淘寶源 gem sources -a https://ruby.taobao.org/ //3.打印是否替換成功 gem sources -l //4.更換成功后打印如下 *** CURRENT SOURCES *** https://ruby.taobao.org/ ~~~ `Ruby`自帶一個叫做`RubyGems`的系統,用來安裝基于`Ruby`的軟件。我們可以使用這個系統來 輕松地安裝`Sass`和`Compass`。要安裝最新版本的`Sass`和`Compass`,你需要輸入下面的命令: ~~~ //安裝如下(如mac安裝遇到權限問題需加 sudo gem install sass) gem install sass gem install compass ~~~ 在每一個安裝過程中,你都會看到如下輸出: ~~~ Fetching: sass-3.x.x.gem (100%) Successfully installed sass-3.x.x Parsing documentation for sass-3.x.x Installing ri documentation for sass-3.x.x Done installing documentation for sass after 6 secon 1 gem installed ~~~ 安裝完成之后,你應該通過運行下面的命令來確認應用已經正確地安裝到了電腦中: ~~~ sass -v Sass 3.x.x (Selective Steve) compass -v Compass 1.x.x (Polaris) Copyright (c) 2008-2015 Chris Eppstein Released under the MIT License. Compass is charityware. Please make a tax deductable donation for a worthy cause: http://umdf.org/compass ~~~ 如下sass常用更新、查看版本、sass命令幫助等命令: ~~~ //更新sass gem update sass //查看sass版本 sass -v //查看sass幫助 sass -h ~~~
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