added stuff

nyx/modules/core/common/system/gaming/default.nix

@@ -0,0 +1,7 @@
+{
+  imports = [
+    ./gamescope.nix
+    ./gamemode.nix
+    ./steam.nix
+  ];
+}

nyx/modules/core/common/system/gaming/gamemode.nix

@@ -0,0 +1,75 @@
+{
+  inputs,
+  config,
+  pkgs,
+  lib,
+  ...
+}: let
+  inherit (lib) mkIf makeBinPath optionalString;
+  inherit (config) modules;
+
+  env = modules.usrEnv;
+  sys = modules.system;
+  prg = sys.programs;
+
+  programs = makeBinPath (with pkgs; [
+    inputs.hyprland.packages.${stdenv.system}.default
+    coreutils
+    power-profiles-daemon
+    systemd
+    libnotify
+  ]);
+
+  startscript = pkgs.writeShellScript "gamemode-start" ''
+    ${optionalString (env.desktop == "Hyprland") ''
+      export PATH=$PATH:${programs}
+      export HYPRLAND_INSTANCE_SIGNATURE=$(ls -w1 /tmp/hypr | tail -1)
+      hyprctl --batch 'keyword decoration:blur 0 ; keyword animations:enabled 0 ; keyword misc:vfr 0'
+    ''}
+
+    powerprofilesctl set performance
+    notify-send -a 'Gamemode' 'Optimizations activated' -u 'low'
+  '';
+
+  endscript = pkgs.writeShellScript "gamemode-end" ''
+    ${optionalString (env.desktop == "Hyprland") ''
+      export PATH=$PATH:${programs}
+      export HYPRLAND_INSTANCE_SIGNATURE=$(ls -w1 /tmp/hypr | tail -1)
+      hyprctl --batch 'keyword decoration:blur 1 ; keyword animations:enabled 1 ; keyword misc:vfr 1'
+    ''}
+
+    powerprofilesctl set balanced
+    notify-send -a 'Gamemode' 'Optimizations deactivated' -u 'low'
+  '';
+in {
+  config = mkIf prg.gaming.gamemode.enable {
+    programs.gamemode = {
+      enable = true;
+      enableRenice = true;
+      settings = {
+        general = {
+          softrealtime = "auto";
+          renice = 15;
+        };
+
+        custom = {
+          start = startscript.outPath;
+          end = endscript.outPath;
+        };
+      };
+    };
+
+    security.wrappers.gamemode = {
+      owner = "root";
+      group = "root";
+      source = "${pkgs.gamemode}/bin/gamemoderun";
+      capabilities = "cap_sys_ptrace,cap_sys_nice+pie";
+    };
+
+    boot.kernel.sysctl = {
+      # default on some gaming (SteamOS) and desktop (Fedora) distributions
+      # might help with gaming performance
+      "vm.max_map_count" = 2147483642;
+    };
+  };
+}

nyx/modules/core/common/system/gaming/gamescope.nix

@@ -0,0 +1,28 @@
+{
+  config,
+  pkgs,
+  lib,
+  ...
+}: let
+  inherit (lib.modules) mkIf;
+  inherit (config) modules;
+
+  sys = modules.system;
+  prg = sys.programs;
+in {
+  config = mkIf prg.gaming.gamescope.enable {
+    programs.gamescope = {
+      enable = true;
+      package = pkgs.gamescope; # the default, here in case I want to override it
+    };
+
+    # workaround attempt for letting gamescope bypass YAMA LSM
+    # doesn't work, but doesn't hurt to keep this here
+    security.wrappers.gamescope = {
+      owner = "root";
+      group = "root";
+      source = "${config.programs.gamescope.package}/bin/gamescope";
+      capabilities = "cap_sys_ptrace,cap_sys_nice+pie";
+    };
+  };
+}

nyx/modules/core/common/system/gaming/steam.nix

@@ -0,0 +1,83 @@
+{
+  config,
+  pkgs,
+  lib,
+  ...
+}: let
+  inherit (lib.modules) mkIf;
+
+  prg = config.modules.system.programs;
+in {
+  config = mkIf prg.gaming.steam.enable {
+    nixpkgs = {
+      config = {
+        allowUnfreePredicate = pkg:
+          builtins.elem (lib.getName pkg) [
+            "steam"
+            "steam-original"
+            "steam-runtime"
+          ];
+      };
+
+      overlays = [
+        (_: prev: {
+          steam = prev.steam.override ({extraPkgs ? _: [], ...}: {
+            extraPkgs = pkgs':
+              (extraPkgs pkgs')
+              # Add missing dependencies
+              ++ (with pkgs'; [
+                # Generic dependencies
+                libgdiplus
+                keyutils
+                libkrb5
+                libpng
+                libpulseaudio
+                libvorbis
+                stdenv.cc.cc.lib
+                xorg.libXcursor
+                xorg.libXi
+                xorg.libXinerama
+                xorg.libXScrnSaver
+                at-spi2-atk
+                fmodex
+                gtk3
+                gtk3-x11
+                harfbuzz
+                icu
+                glxinfo
+                inetutils
+                libthai
+                mono5
+                pango
+                stdenv.cc.cc.lib
+                strace
+                zlib
+
+                # for Titanfall 2 Northstar launcher
+                libunwind
+              ]);
+          });
+        })
+      ];
+    };
+
+    programs.steam = {
+      # Enable steam
+      enable = true;
+
+      # Whether to open ports in the firewall for Steam Remote Play
+      remotePlay.openFirewall = false;
+
+      # Whether to open ports in the firewall for Source Dedicated Server
+      dedicatedServer.openFirewall = false;
+
+      # Compatibility tools to install
+      # For the accepted format (and the reason behind)
+      # the "compattool" attribute, see:
+      # <https://github.com/NixOS/nixpkgs/pull/296009>
+      extraCompatPackages = [
+        pkgs.proton-ge-bin.steamcompattool
+      ];
+    };
+  };
+}