nixos/programs/retroarch: init

modules/nixos/default.nix

@@ -4,6 +4,7 @@
     ./programs/distrobox.nix
     ./programs/gnome-session
     ./programs/pop-launcher.nix
+    ./programs/retroarch.nix
     ./programs/sessiond
     ./programs/wezterm.nix
     ./services/archivebox.nix

modules/nixos/programs/retroarch.nix

@@ -0,0 +1,51 @@
+{ config, lib, pkgs, ... }:
+
+let
+  cfg = config.programs.retroarch;
+
+  finalPkg = cfg.package.override {
+    inherit (cfg) cores settings;
+  };
+in
+{
+  options.programs.retroarch = {
+    enable = lib.mkEnableOption "configuring Retroarch";
+
+    package = lib.mkPackageOption pkgs "retroarch" { };
+
+    cores = lib.mkOption {
+      type = with lib.types; listOf package;
+      default = [ ];
+      description = ''
+        List of Retroarch cores to be included with the package.
+      '';
+      example = lib.literalExpression ''
+        with pkgs.libretro; [
+          ppsspp
+          desmume
+          pcsx2
+        ]
+      '';
+    };
+
+    settings = lib.mkOption {
+      type = with lib.types; attrsOf anything;
+      default = { };
+      description = ''
+        Additional settings to be configured with the Retroarch nixpkgs
+        wrapper.
+      '';
+      example = lib.literalExpression ''
+        {
+          assets_directory = "''${pkgs.retroarch-assets}/share/retroarch-assets";
+          joypad_autoconfig_dir = "''${pkgs.retroarch-joypad-autoconfig}/share/libretro/autoconfig";
+          libretro_info_path = "''${pkgs.libretro-core-info}/share/retroarch/cores";
+        }
+      '';
+    };
+  };
+
+  config = lib.mkIf cfg.enable {
+    environment.systemPackages = [ finalPkg ];
+  };
+}