miku: Disable keypad lights with gamemode

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" ''
-            ${pkgs.dbus}/bin/dbus-send --print-reply --dest=org.fcitx.Fcitx5 /controller org.fcitx.Fcitx.Controller1.SwitchInputMethodGroup string:'${groupName}'
-          '';
+          switchScript = 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}'';
-          end = ''${resumeFcitx}'';
+          start = "${start}";
+          end = "${end}";
         };
       };
     };