nixpkgs/nixos/modules/programs/thefuck.nix

{
  config,
  pkgs,
  lib,
  ...
}:

let
  prg = config.programs;
  cfg = prg.thefuck;

  bashAndZshInitScript = ''
    eval $(${pkgs.thefuck}/bin/thefuck --alias ${cfg.alias})
  '';
  fishInitScript = ''
    ${pkgs.thefuck}/bin/thefuck --alias ${cfg.alias} | source
  '';
in
{
  options = {
    programs.thefuck = {
      enable = lib.mkEnableOption "thefuck, an app which corrects your previous console command";

      alias = lib.mkOption {
        default = "fuck";
        type = lib.types.str;

        description = ''
          `thefuck` needs an alias to be configured.
          The default value is `fuck`, but you can use anything else as well.
        '';
      };
    };
  };

  config = lib.mkIf cfg.enable {
    environment.systemPackages = with pkgs; [ thefuck ];

    programs.bash.interactiveShellInit = bashAndZshInitScript;
    programs.zsh.interactiveShellInit = lib.mkIf prg.zsh.enable bashAndZshInitScript;
    programs.fish.interactiveShellInit = lib.mkIf prg.fish.enable fishInitScript;
  };
}