Merge branch pull request #152 from bachue/robbyrussell_fish_prompt

themes/robbyrussell/README.md

 ## robbyrussell
 The default theme – cloned from oh-my-zsh.
 
-![robbyrussell theme](http://f.cl.ly/items/2q0v3i3y2E1F0C1R3C1y/Screen%20Shot%202013-08-06%20at%2017.52.17%20.png)
+![robbyrussell theme](https://bachue.github.io/oh-my-fish/images/robbyrussell-screenshot.png)
 
 
 #### Characteristics
 
 * Displays git information in the command prompt when available.
+* If the last command was failed, the indicator would be red, otherwise it's green

themes/robbyrussell/fish_prompt.fish

@@ -8,13 +8,19 @@ function _is_git_dirty
 end
 
 function fish_prompt
+  set -l last_status $status
   set -l cyan (set_color -o cyan)
   set -l yellow (set_color -o yellow)
   set -l red (set_color -o red)
   set -l blue (set_color -o blue)
+  set -l green (set_color -o green)
   set -l normal (set_color normal)
 
-  set -l arrow "$red➜ "
+  if test $last_status = 0
+      set arrow "$green➜ "
+  else
+      set arrow "$red➜ "
+  end
   set -l cwd $cyan(basename (prompt_pwd))
 
   if [ (_git_branch_name) ]