nix-config/modules/home-manager/programs/emulators.nix

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

let cfg = config.modules.programs.emulators;
in {
  options.modules.programs.emulators = {
    ds.enable       = lib.mkOption {
      default = false;
      example = true;
    };
    gb.enable       = lib.mkOption {
      default = false;
      example = true;
    };
    gba.enable      = lib.mkOption {
      default = false;
      example = true;
    };
    gamecube.enable = lib.mkOption {
      default = false;
      example = true;
    };
    ps1.enable      = lib.mkOption {
      default = false;
      example = true;
    };
    ps2.enable      = lib.mkOption {
      default = false;
      example = true;
    };
    ps3.enable      = lib.mkOption {
      default = false;
      example = true;
    };
    psp.enable      = lib.mkOption {
      default = false;
      example = true;
    };
    snes.enable     = lib.mkOption {
      default = false;
      example = true;
    };
    switch.enable   = lib.mkOption {
      default = false;
      example = true;
    };
    wii.enable      = lib.mkOption {
      default = false;
      example = true;
    };
    xbox.enable     = lib.mkOption {
      default = false;
      example = true;
    };
  };

  config = {
    user.packages = with pkgs; [
      (lib.mkIf cfg.ps1.enable duckstation)
      (lib.mkIf cfg.ps2.enable unstable.pcsx2)
      (lib.mkIf cfg.ps3.enable rpcs3)
      (lib.mkIf cfg.psp.enable unstable.ppsspp)
      (lib.mkIf cfg.ds.enable desmume)
      (lib.mkIf (cfg.gba.enable ||
             cfg.gb.enable  ||
             cfg.snes.enable)
        higan)
      (lib.mkIf cfg.switch.enable yuzuPackages.mainline)
      (lib.mkIf (cfg.wii.enable ||
             cfg.gamecube.enable)
        dolphin-emu)
      (lib.mkIf cfg.xbox.enable unstable.xemu)
    ];
  };
}