fish shell prompt with mercurial

if test -d .hg
         set -g __hg_branch (hg branch 2> /dev/null)
         set -g __hg_dirty (hg status 2> /dev/null | grep -v "?" | sort | uniq | head -c1)
         printf "%s@%s %s%s%s (%s%s%s%s%s)%s%s%s%s " $USER $__fish_prompt_hostname "$__fish_prompt_cwd" (prompt_pwd) "$__fish_prompt_normal" (set_color -b 5fff5f) (set_color red) $__hg_branch (set_color normal) (set_color -b normal) (set_color red) $__hg_dirty (set_color normal) $user_prompt

    else
         printf '%s@%s %s%s%s%s%s ' $USER $__fish_prompt_hostname "$__fish_prompt_cwd" (prompt_pwd) "$__fish_prompt_normal" $user_prompt

    end