fish prompt

fish_prompt.fish

function fish_prompt
 if not set -q -g __fish_robbyrussell_functions_defined
     set -g __fish_robbyrussell_functions_defined
     function _git_branch_name
         echo (git symbolic-ref HEAD ^/dev/null | sed -e 's|^refs/heads/||')
     end

     function _is_git_dirty
         echo (git status -s --ignore-submodules=dirty ^/dev/null)
     end

     function _get_git_changes
         set -l green (set_color green)
         set -l red (set_color red)
         echo (git diff --numstat | awk -F"\t" '{sum1+=$1; sum2+=$2} END {print sum1 "\t" sum2}' | sed "s/^\([0-9]*\)\t\([0-9]*\)/$green+\1$red-\2/g")
     end
 end

 if set --query "VIRTUAL_ENV"
     printf "(%s) %s" (basename $VIRTUAL_ENV)
 end

 set -l cyan (set_color cyan)
 set -l yellow (set_color yellow)
 set -l red (set_color red)
 set -l blue (set_color blue)
 set -l normal (set_color normal)

 set -l cwd $cyan(basename (prompt_pwd))

 if [ (_git_branch_name) ]
     set -l git_branch $blue(_git_branch_name)
     set git_info $git_branch

     if [ (_is_git_dirty) ]
         set -l changes (_get_git_changes)
         set git_info "$git_info$normal($changes$normal)"
     end
 end

 echo -n -s $cwd " " $git_info $normal ' '
 z --add "$PWD"
end