add gaming

default.nix

@@ -57,6 +57,12 @@ in {
       default = false;
       description = "whether to enable graphical components";
     };
+
+    gaming = mkOption {
+      type = types.bool;
+      default = false;
+      description = "enables steam, heroic, prism and gamemoded"
+    };
   };
 
   imports = [
@@ -67,5 +73,6 @@ in {
     ./modules/toolchains.nix
     ./modules/sound.nix
     ./modules/opengl.nix
+    ./modules/gaming.nix
   ];
 }

modules/gaming.nix

@@ -0,0 +1,47 @@
+{ pkgs, config, lib, ... }: let
+  cfg = config.grimmShared;
+in {
+  config = with cfg; lib.mkIf (enable && gaming) {
+    programs.steam = {
+      enable = true;
+      gamescopeSession.enable = true;
+      gamescopeSession.env = { 
+        DRI_PRIME = "1";
+      };
+    };
+
+    programs.gamemode = {
+      enable = true;
+      settings = {
+        general = {
+          inhibit_screensaver=0;
+          renice = 10;
+        };
+        custom = {
+          start = "${pkgs.libnotify}/bin/notify-send 'GameMode started'";
+          end = "${pkgs.libnotify}/bin/notify-send 'GameMode ended'";
+        };
+      };
+    };
+
+    services.udev.packages = [ pkgs.wooting-udev-rules ];
+
+    environment.sessionVariables = {
+      GAMEMODERUNEXEC="env DRI_PRIME=1";
+    };
+
+    environment.systemPackages = with pkgs; [
+      heroic
+      prismlauncher
+      wootility
+      (pkgs.symlinkJoin {
+        name = "osu";
+        paths = [
+          (pkgs.writeShellScriptBin "osu!" ''exec gamemoderun ${pkgs.osu-lazer-bin}/bin/'osu!'
+          '')
+          pkgs.osu-lazer-bin
+        ];
+      })
+    ];
+  };
+}