{ ... }: {
  programs.fish = {
    enable = true;

    shellAliases = {
      ga = "git add .";
      gc = "git commit -am";
      gp = "git push";
      gpr = "git pull --rebase";
      gl = "git pull";
    };

    functions = {

      fish_greeting = "";

      fish_prompt = ''
        set -l last_pipestatus $pipestatus
        set -lx __fish_last_status $status # Export for __fish_print_pipestatus.
        set -l normal (set_color normal)
        set -q fish_color_status
        or set -g fish_color_status red

        # Color the prompt differently when we're root
        set -l color_cwd $fish_color_cwd
        set -l suffix '>'
        if functions -q fish_is_root_user; and fish_is_root_user
            if set -q fish_color_cwd_root
                set color_cwd $fish_color_cwd_root
            end
            set suffix '#'
        end

        # Write pipestatus
        # If the status was carried over (if no command is issued or if `set` leaves the status untouched), don't bold it.
        set -l bold_flag --bold
        set -q __fish_prompt_status_generation; or set -g __fish_prompt_status_generation $status_generation
        if test $__fish_prompt_status_generation = $status_generation
            set bold_flag
        end
        set __fish_prompt_status_generation $status_generation
        set -l status_color (set_color $fish_color_status)
        set -l statusb_color (set_color $bold_flag $fish_color_status)
        set -l prompt_status (__fish_print_pipestatus "[" "]" "|" "$status_color" "$statusb_color" $last_pipestatus)

        echo -n -s (prompt_login)' ' (set_color $color_cwd) (prompt_pwd) $normal (fish_vcs_prompt) $normal " "$prompt_status $suffix " "
      '';

      prompt_pwd = ''
        set -l options h/help d/dir-length= D/full-length-dirs=
        argparse -n prompt_pwd $options -- $argv
        or return

        if set -q _flag_help
            __fish_print_help prompt_pwd
            return 0
        end

        set -q argv[1]
        or set argv $PWD

        set -ql _flag_d
        and set -l fish_prompt_pwd_dir_length $_flag_d

        set -q fish_prompt_pwd_dir_length
        or set -l fish_prompt_pwd_dir_length 1

        set -l fulldirs 0
        set -ql _flag_D
        and set -l fish_prompt_pwd_full_dirs $_flag_D

        set -q fish_prompt_pwd_full_dirs
        or set -l fish_prompt_pwd_full_dirs 1

        for path in $argv
            # Replace $HOME with "~"
            set -l realhome (string escape --style=regex -- ~)
            set -l tmp (string replace -r '^'"$realhome"'($|/)' '~$1' $path)

            set -l full
            set -l all (string split -m (math $fish_prompt_pwd_full_dirs - 1) -r / $tmp)
            set tmp $all[1]
            set full $all[2..]

            string join / -- (string replace -ar -- '(\.?[^/]{'"100"'})[^/]*/' '$1/' $tmp) $full
        end
      '';
    };
  };
}