machine_setup/nix/steam_deck/configuration/roles/sm64ex/default.nix

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

let
  steam_sm64ex = pkgs.writeScriptBin "steam_sm64ex" ''
    export LD_LIBRARY_PATH="$LD_LIBRARY_PATH:${pkgs.libglvnd}/lib"
    exec ${pkgs.sm64ex}/bin/sm64ex
  '';
in
{
  imports = [ ];

  options.me = {
    sm64ex.enable = lib.mkOption {
      type = lib.types.bool;
      default = false;
      example = true;
      description = "Whether we want to install sm64ex.";
    };
  };

  config = lib.mkIf config.me.sm64ex.enable (
    lib.mkMerge [
      (lib.mkIf config.me.graphical {
        allowedUnfree = [ "sm64ex" ];

        home.packages = with pkgs; [
          sm64ex
          steam_sm64ex
        ];

        # nixpkgs.overlays = [
        #   (final: prev: {
        #     sm4ex = prev.sm64ex.override {
        #       baseRom.name = "SuperMario64.z64";
        #     };
        #   })
        # ];

        home.file.".local/share/sm64ex/sm64config.txt" = {
          source = ./files/sm64config.txt;
        };

        home.persistence."/home/deck/.persist" = {
          files = [
            ".local/share/sm64ex/sm64_save_file.bin"
          ];
        };

        nixpkgs.overlays = [
          (final: prev: {
            sm64ex =
              let
                desktop_item = pkgs.makeDesktopItem {
                  name = "sm64ex";
                  desktopName = "Super Mario 64";
                  comment = "A PC Port of Super Mario 64.";
                  categories = [
                    "Game"
                  ];
                  icon = "sm64ex";
                  type = "Application";
                  exec = "sm64ex";
                };
              in
              pkgs.buildEnv {
                name = prev.sm64ex.name;
                paths = [
                  (config.lib.nixGL.wrap prev.sm64ex)
                ];
                extraOutputsToInstall = [
                  "man"
                  "doc"
                  "info"
                ];
                # We have to use 555 instead of the normal 444 here because the .desktop file ends up inside $HOME on steam deck and desktop files must be either not in $HOME or must be executable, otherwise KDE Plasma refuses to execute them.
                postBuild = ''
                  install -m 555 -D "${desktop_item}/share/applications/"* -t $out/share/applications/
                  install -m 444 -D "${./files/icon.png}" $out/share/pixmaps/sm64ex.png
                '';
              };
          })
        ];
      })
    ]
  );
}