juicer をinstall

gem install juicer
Fetching: cmdparse-2.0.3.gem (100%)
Fetching: nokogiri-1.5.0.gem (100%)
Building native extensions. This could take a while...
Fetching: rubyzip-0.9.5.gem (100%)
Fetching: juicer-1.0.13.gem (100%)
Juicer does not ship with third party libraries. You probably want to install
Yui Compressor and JsLint now:

juicer install yui_compressor
juicer install jslint

Happy juicing!
Successfully installed cmdparse-2.0.3
Successfully installed nokogiri-1.5.0
Successfully installed rubyzip-0.9.5
Successfully installed juicer-1.0.13
4 gems installed
Installing ri documentation for cmdparse-2.0.3...
Installing ri documentation for nokogiri-1.5.0...
Installing ri documentation for rubyzip-0.9.5...
Installing ri documentation for juicer-1.0.13...
Installing RDoc documentation for cmdparse-2.0.3...
Installing RDoc documentation for nokogiri-1.5.0...
Installing RDoc documentation for rubyzip-0.9.5...
Installing RDoc documentation for juicer-1.0.13...
hawk:~ kei$ juicer install yui_compressor
Installing Yui Compressor 2.4.7 in /Users/kei/.juicer/lib/yui_compressor
Downloading http://yui.zenfs.com/releases/yuicompressor/yuicompressor-2.4.7.zip
Successfully installed YuiCompressor 2.4.7 in /Users/kei/.juicer/lib/yui_compressor
hawk:~ kei$ juicer install jslint
Installing JsLint 1.0 in /Users/kei/.juicer/lib/jslint
Installing dependencies
Installing Rhino 1_7R3 in /Users/kei/.juicer/lib/rhino
Downloading http://ftp.mozilla.org/pub/mozilla.org/js/rhino1_7R3.zip
Successfully installed Jslint 1.0 in /Users/kei/.juicer/lib/jslint