set fish_git_dirty_color red
set fish_git_not_dirty_color green

function parse_git_branch
    set -l branch (git branch 2> /dev/null | grep -e '\* ' | sed 's/^..\(.*\)/\1/')
    set -l git_status (git status -s)

    if test -n "$git_status"
        echo (set_color $fish_git_dirty_color)$branch(set_color normal)
    else
        echo (set_color $fish_git_not_dirty_color)$branch(set_color normal)
    end
end

function fish_prompt
    set -l git_dir (git rev-parse --git-dir 2> /dev/null)
    if test -n "$git_dir"
        printf 'λ  %s%s/%s %s ' (set_color $fish_color_cwd) (prompt_pwd) (set_color normal) (parse_git_branch)
    else
        printf 'λ  %s%s/%s ' (set_color $fish_color_cwd) (prompt_pwd) (set_color normal)
    end
end