[Jekyll] EI Capitan jekyll can't run 解决方案。-大蜕

EI Capitan是mac目前最新版的系统，作为更新强迫症患者总是第一时间更新, 只是这一次才发现，原来mac也会对用户安装的程序有细微的影响。。
事情比较简单，更新了系统，jekyll用不了了. 多亏坐在我旁边好奇的lily发现了这个bug。。！
本来本机安装的ruby的路径(/System/Library/Frameworks/Ruby.framework/Versions/2.0/usr/lib/ruby/gems/2.0.0/gems)下应该是有jekyll组件的. 没了重新安装时，出现了无法写入”/usr/bin/jekyll”的错误: no permission
安装方式

sudo gem install jekyll

而后发现github上有很多人都提出了这个问题，应该是系统更新后，有些方式变了，由于我对ruby了解不多，在此先不做讨论
解决方法

将jekyll组件安装在用户路径之下

sudo gem install -n /usr/local/bin jekyll

运行jekyll报错

➜  demo  jekyll serve --trace
Configuration file: /Users/sddtc/Code/Jekyll/demo/_config.yml
         Source: /Users/sddtc/Code/Jekyll/demo
    Destination: /Users/sddtc/Code/Jekyll/demo/_site
   Generating...
                 done.
I, [2015-10-14T16:18:09.163411 #4957]  INFO -- : Celluloid 0.17.2 is running in BACKPORTED mode. [ http://git.io/vJf3J ]
/Library/Ruby/Gems/2.0.0/gems/celluloid-0.17.2/lib/celluloid/calls.rb:48:in `check': wrong number of arguments (2 for 1) (ArgumentError)
 from /Library/Ruby/Gems/2.0.0/gems/celluloid-0.17.2/lib/celluloid/calls.rb:26:in `dispatch'
 from /Library/Ruby/Gems/2.0.0/gems/celluloid-0.17.2/lib/celluloid/call/sync.rb:16:in `dispatch'
 from /Library/Ruby/Gems/2.0.0/gems/celluloid-0.17.2/lib/celluloid/cell.rb:50:in `block in dispatch'
 from /Library/Ruby/Gems/2.0.0/gems/celluloid-0.17.2/lib/celluloid/cell.rb:76:in `block in task'
 from /Library/Ruby/Gems/2.0.0/gems/celluloid-0.17.2/lib/celluloid/actor.rb:339:in `block in task'
 from /Library/Ruby/Gems/2.0.0/gems/celluloid-0.17.2/lib/celluloid/task.rb:44:in `block in initialize'
 from /Library/Ruby/Gems/2.0.0/gems/celluloid-0.17.2/lib/celluloid/task/fibered.rb:14:in `block in create'
 from (celluloid):0:in `remote procedure call'
 from /Library/Ruby/Gems/2.0.0/gems/celluloid-0.17.2/lib/celluloid/call/sync.rb:45:in `value'
 from /Library/Ruby/Gems/2.0.0/gems/celluloid-0.17.2/lib/celluloid/proxy/sync.rb:38:in `method_missing'
 from /Library/Ruby/Gems/2.0.0/gems/listen-2.7.9/lib/listen/listener.rb:196:in `_init_actors'
 from /Library/Ruby/Gems/2.0.0/gems/listen-2.7.9/lib/listen/listener.rb:77:in `block in <class:Listener>'
 from /Library/Ruby/Gems/2.0.0/gems/celluloid-fsm-0.20.5/lib/celluloid/fsm.rb:176:in `instance_eval'
 from /Library/Ruby/Gems/2.0.0/gems/celluloid-fsm-0.20.5/lib/celluloid/fsm.rb:176:in `call'
 from /Library/Ruby/Gems/2.0.0/gems/celluloid-fsm-0.20.5/lib/celluloid/fsm.rb:129:in `transition_with_callbacks!'
 from /Library/Ruby/Gems/2.0.0/gems/celluloid-fsm-0.20.5/lib/celluloid/fsm.rb:97:in `transition'
 from /Library/Ruby/Gems/2.0.0/gems/listen-2.7.9/lib/listen/listener.rb:90:in `start'
 from /Library/Ruby/Gems/2.0.0/gems/jekyll-watch-1.1.0/lib/jekyll/watcher.rb:7:in `watch'
 from /Library/Ruby/Gems/2.0.0/gems/jekyll-2.5.3/lib/jekyll/commands/build.rb:68:in `watch'
 from /Library/Ruby/Gems/2.0.0/gems/jekyll-2.5.3/lib/jekyll/commands/build.rb:38:in `process'
 from /Library/Ruby/Gems/2.0.0/gems/jekyll-2.5.3/lib/jekyll/commands/serve.rb:26:in `block (2 levels) in init_with_program'
 from /Library/Ruby/Gems/2.0.0/gems/mercenary-0.3.4/lib/mercenary/command.rb:220:in `call'
 from /Library/Ruby/Gems/2.0.0/gems/mercenary-0.3.4/lib/mercenary/command.rb:220:in `block in execute'
 from /Library/Ruby/Gems/2.0.0/gems/mercenary-0.3.4/lib/mercenary/command.rb:220:in `each'
 from /Library/Ruby/Gems/2.0.0/gems/mercenary-0.3.4/lib/mercenary/command.rb:220:in `execute'
 from /Library/Ruby/Gems/2.0.0/gems/mercenary-0.3.4/lib/mercenary/program.rb:35:in `go'
 from /Library/Ruby/Gems/2.0.0/gems/mercenary-0.3.4/lib/mercenary.rb:22:in `program'
 from /Library/Ruby/Gems/2.0.0/gems/jekyll-2.5.3/bin/jekyll:20:in `<top (required)>'
 from /usr/local/bin/jekyll:23:in `load'
 from /usr/local/bin/jekyll:23:in `<main>'

解决这个错误也是有人提出修改一下Celluloid的安装版本,用0.16.0
~~~vim ➜ demo sudo gem install celluloid –version ‘=0.16.0’ Fetching: timers-4.0.4.gem (100%) Successfully installed timers-4.0.4 Fetching: celluloid-0.16.0.gem (100%) Successfully installed celluloid-0.16.0 Parsing documentation for timers-4.0.4 Installing ri documentation for timers-4.0.4 Parsing documentation for celluloid-0.16.0 Installing ri documentation for celluloid-0.16.0 2 gems installed

➜ demo sudo gem uninstall celluloid –version ‘=0.17.2’
Successfully uninstalled celluloid-0.17.2

4. 可以查看一下本地安装的组件，没用的也可以删掉了  
~~~vim
gem list --local