miku: Disable keypad lights with gamemode

flake.nix

@@ -56,7 +56,7 @@
         ];
       };
     in {
-      inherit (pkgs) wayqt dfl-ipc dfl-applications dfl-utils qtgreet xwaylandvideobridge obs-cli;
+      inherit (pkgs) wayqt dfl-ipc dfl-applications dfl-utils qtgreet xwaylandvideobridge obs-cli rgb_keyboard;
     };
   });
 }

hosts/miku.nix

@@ -166,6 +166,8 @@
     kernel.sysctl = {
       # League of Legends under Linux
       "abi.vsyscall32" = 0;
+      # Fedora 39
+      "vm.max_map_count" = 2147483642;
     };
     
     extraModulePackages = [ kernel.vendor-reset ];

modules/services/gamemode/default.nix

@@ -7,7 +7,15 @@ in {
     enable = lib.mkEnableOption "Enable and configure gamemode";
   };
 
-  config = lib.mkIf cfg.enable {
+  config = let
+    keyboardBrightnessScript = pkgs.writeShellScript "keyboard-brightness.sh" ''
+    ${pkgs.rgb_keyboard}/bin/rgb_keyboard -l ripple -b "$1"
+    '';
+  in lib.mkIf cfg.enable {
+    security.sudo.extraConfig = ''
+    ${config.ptw.system.singleUser} ALL = (ALL) NOPASSWD: ${keyboardBrightnessScript}
+    '';
+
     programs.gamemode = {
       enable = true;
       enableRenice = true;
@@ -29,14 +37,28 @@ in {
         };
 
         custom = let
-          switchScript = groupName: pkgs.writeShellScript "switch-input-group.sh" ''
+          switchScript = groupName: "${pkgs.dbus}/bin/dbus-send --print-reply --dest=org.fcitx.Fcitx5 /controller org.fcitx.Fcitx.Controller1.SwitchInputMethodGroup string:'${groupName}'";
-            ${pkgs.dbus}/bin/dbus-send --print-reply --dest=org.fcitx.Fcitx5 /controller org.fcitx.Fcitx.Controller1.SwitchInputMethodGroup string:'${groupName}'
-          '';
           pauseFcitx = switchScript "Group 2";
           resumeFcitx = switchScript "Group 1";
+
+          # The scripts
+          start = pkgs.writeShellScript "gamemode-start.sh" ''
+            # Disable Fcitx's IME
+            ${pauseFcitx}
+
+            # Turn on the keyboard lights
+            ${config.security.wrapperDir}/sudo ${keyboardBrightnessScript} 1
+          '';
+          end = pkgs.writeShellScript "gamemode-end.sh" ''
+            # Resume Fcitx's IME
+            ${resumeFcitx}
+
+            # Turn off the keyboard lights
+            ${config.security.wrapperDir}/sudo ${keyboardBrightnessScript} 0
+          '';
         in {
-          start = ''${pauseFcitx}'';
+          start = "${start}";
-          end = ''${resumeFcitx}'';
+          end = "${end}";
         };
       };
     };

packages/applications/desktop/rgb_keyboard/default.nix

@@ -0,0 +1,30 @@
+{
+  stdenv
+, fetchFromGitHub
+, gcc, gnumake
+, libusb
+}:
+
+stdenv.mkDerivation rec {
+  pname = "rgb_keyboard";
+  version = "20230430";
+  src = fetchFromGitHub {
+    owner = "PapaTutuWawa";
+    repo = "rgb_keyboard";
+    rev = "5bbdafea77ef3c3eb47081494f3b58abcd5c4e27";
+    sha256 = "0m5hvlhqncy1qn5v6gpsz9qd2p4cvcjjnma08vb4b2ybq4kfv7qw";
+  };
+
+  buildInputs = [
+    libusb
+  ];
+
+  buildPhase = ''
+    ${gnumake}/bin/make build
+  '';
+
+  installPhase = ''
+    mkdir -p $out/bin/
+    cp rgb_keyboard $out/bin/
+  '';
+}

packages/default.nix

@@ -123,4 +123,6 @@ in {
   gajim = prev.callPackage ./applications/networking/instant-messengers/gajim/default.nix {
     nbxmpp = prev.python3.pkgs.callPackage ./applications/networking/instant-messengers/gajim/nbxmpp.nix {};
   };
+
+  rgb_keyboard = prev.callPackage ./applications/desktop/rgb_keyboard/default.nix {};
 }