Use WhiteSur ultrawide GRUB theme

nixos/bootloaders/grub.nix

@@ -3,11 +3,11 @@
   lib,
   ...
 }: let
-  cfg = config.myModules.bootloaders.grubWindows;
+  cfg = config.myModules.bootloaders.grub;
   systemdBootCfg = config.myModules.bootloaders.systemdBoot;
 in {
-  options.myModules.bootloaders.grubWindows = {
-    enable = lib.mkEnableOption "GRUB with Windows chainloading support";
+  options.myModules.bootloaders.grub = {
+    enable = lib.mkEnableOption "GRUB bootloader support";
 
     configurationLimit = lib.mkOption {
       default = 5;
@@ -24,6 +24,18 @@ in {
         entries discovered by os-prober.
       '';
     };
+
+    theme = lib.mkOption {
+      default = null;
+      type = lib.types.nullOr lib.types.path;
+      description = "GRUB theme directory.";
+    };
+
+    gfxmode = lib.mkOption {
+      default = "auto";
+      type = lib.types.str;
+      description = "GRUB graphical mode used for EFI and BIOS.";
+    };
   };
 
   config = lib.mkIf cfg.enable {
@@ -31,14 +43,14 @@ in {
       {
         assertion = !systemdBootCfg.enable;
         message = ''
-          myModules.bootloaders.grubWindows.enable conflicts with
+          myModules.bootloaders.grub.enable conflicts with
           myModules.bootloaders.systemdBoot.enable. Disable systemdBoot before
-          enabling the GRUB Windows boot strategy.
+          enabling the GRUB boot strategy.
         '';
       }
       {
         assertion = builtins.hasAttr "/boot" config.fileSystems;
-        message = "The GRUB Windows boot strategy expects an EFI filesystem mounted at /boot.";
+        message = "The GRUB boot strategy expects an EFI filesystem mounted at /boot.";
       }
     ];
 
@@ -55,6 +67,9 @@ in {
         useOSProber = true;
         configurationLimit = cfg.configurationLimit;
         timeoutStyle = "menu";
+        theme = lib.mkIf (cfg.theme != null) (lib.mkDefault cfg.theme);
+        gfxmodeEfi = lib.mkDefault cfg.gfxmode;
+        gfxmodeBios = lib.mkDefault cfg.gfxmode;
         extraEntries = lib.optionalString (cfg.windowsEfiUuid != null) ''
           menuentry "Windows Boot Manager" {
             insmod part_gpt

nixos/configuration.nix

@@ -7,7 +7,7 @@
     ./android.nix
     ./base.nix
     ./ben.nix
-    ./bootloaders/grub-windows.nix
+    ./bootloaders/grub.nix
     ./bootloaders/systemd-boot.nix
     ./cache-server.nix
     ./cache.nix

nixos/flake.lock

@@ -594,6 +594,26 @@
         "type": "github"
       }
     },
+    "grub2-themes": {
+      "inputs": {
+        "nixpkgs": [
+          "nixpkgs"
+        ]
+      },
+      "locked": {
+        "lastModified": 1757136219,
+        "narHash": "sha256-tKU+vq34KHu/A2wD7WdgP5A4/RCmSD8hB0TyQAUlixA=",
+        "owner": "vinceliuice",
+        "repo": "grub2-themes",
+        "rev": "80dd04ddf3ba7b284a7b1a5df2b1e95ee2aad606",
+        "type": "github"
+      },
+      "original": {
+        "owner": "vinceliuice",
+        "repo": "grub2-themes",
+        "type": "github"
+      }
+    },
     "hercules-ci-effects": {
       "inputs": {
         "flake-parts": "flake-parts_3",
@@ -1678,6 +1698,7 @@
         "git-blame-rank": "git-blame-rank",
         "git-ignore-nix": "git-ignore-nix",
         "git-sync-rs": "git-sync-rs",
+        "grub2-themes": "grub2-themes",
         "home-manager": "home-manager",
         "hypr-workspace-history": "hypr-workspace-history",
         "hyprNStack": "hyprNStack",

nixos/flake.nix

@@ -236,6 +236,10 @@
       };
     };
 
+    grub2-themes = {
+      url = "github:vinceliuice/grub2-themes";
+      inputs.nixpkgs.follows = "nixpkgs";
+    };
   };
 
   outputs = inputs @ {

nixos/machines/ryzen-shine.nix

@@ -1,9 +1,11 @@
 {
+  inputs,
   lib,
   pkgs,
   ...
 }: {
   imports = [
+    inputs.grub2-themes.nixosModules.default
     ../configuration.nix
     ../nixified.ai.nix
   ];
@@ -41,9 +43,16 @@
 
   boot.loader.systemd-boot.configurationLimit = 5;
   myModules.bootloaders.systemdBoot.enable = false;
-  myModules.bootloaders.grubWindows = {
+  myModules.bootloaders.grub = {
     enable = true;
     windowsEfiUuid = "B270-C7E6";
+    gfxmode = "3440x1440,auto";
+  };
+  boot.loader.grub2-theme = {
+    enable = true;
+    theme = "whitesur";
+    icon = "whitesur";
+    screen = "ultrawide2k";
   };
 
   networking.hostName = "ryzen-shine";

nixos/raspberry-pi.nix

@@ -16,7 +16,7 @@ makeEnable config "myModules.raspberry-pi" false {
   hardware.raspberry-pi."4".fkms-3d.enable = true;
   # hardware.raspberry-pi."4".audio.enable = true;
   myModules.bootloaders.systemdBoot.enable = false;
-  myModules.bootloaders.grubWindows.enable = false;
+  myModules.bootloaders.grub.enable = false;
 
   boot = {
     initrd.systemd.tpm2.enable = false;

nixos/wsl.nix

@@ -13,7 +13,7 @@ makeEnable config "myModules.wsl" false {
   myModules.base.enable = false;
   myModules.desktop.enable = false;
   myModules.bootloaders.systemdBoot.enable = false;
-  myModules.bootloaders.grubWindows.enable = false;
+  myModules.bootloaders.grub.enable = false;
   myModules.xmonad.enable = false;
   myModules.plasma.enable = false;
   # Tailscale-in-WSL is usually better handled by the Windows host Tailscale