aenderer: add grub theme

Author: pogoba

flake-packages.nix

@@ -31,6 +31,7 @@
       build-linux = pkgs.vmTools.runInLinuxVM pkgs.linuxPackages.kernel;
       core-to-core-latency = pkgs.callPackage ./pkgs/core-to-core-latency/default.nix { };
       kdeSplashScreen = pkgs.callPackage ./pkgs/kde-splash { };
+      grub-theme = pkgs.callPackage ./pkgs/grub-theme.nix { };
       synatudor-00fd = pkgs.callPackage ./pkgs/synatudor.nix {};
     };
   };

modules/hardware/hardware-aenderer.nix

@@ -1,4 +1,4 @@
-{ inputs, modulesPath, ... }:
+{ inputs, modulesPath, flakepkgs, ... }:
 
 {
   imports = [
@@ -15,6 +15,7 @@
   # boot.loader.grub.devices = [ "/dev/disk/by-id/nvme-Micron_MTFDKBA512TGD-2BK15ABLT_253652D5E602" ];
   boot.loader.grub.devices = [ "nodev" ];
   boot.loader.grub.gfxmodeEfi = "1920x1200";
+  boot.loader.grub.theme = flakepkgs.grub-theme;
 
   boot.initrd.availableKernelModules = [ "nvme" "xhci_pci" "usb_storage" "usbhid" ];
   boot.initrd.kernelModules = [ ];

pkgs/grub-theme.nix

@@ -0,0 +1,59 @@
+{ pkgs }:
+
+let
+  wallpaper = builtins.path {
+    path = ../users-hm/Jochberg_Nixos_v2.png;
+    name = "background.png";
+  };
+in pkgs.runCommand "grub-theme-jochberg" {
+  nativeBuildInputs = [ pkgs.imagemagick ];
+} ''
+  mkdir -p $out
+
+  # Background: scale to common GRUB resolution
+  magick ${wallpaper} -resize 1920x1200! $out/background.png
+
+  # Theme definition
+  cat > $out/theme.txt <<'THEME'
+  # Global properties
+  title-text: ""
+  desktop-image: "background.png"
+  desktop-color: "#000000"
+  terminal-font: "Unifont Regular 16"
+  terminal-left: "0"
+  terminal-top: "0"
+  terminal-width: "100%"
+  terminal-height: "100%"
+  terminal-border: "0"
+
+  # Boot menu
+  + boot_menu {
+    left = 30%
+    top = 30%
+    width = 40%
+    height = 40%
+    item_font = "Unifont Regular 16"
+    item_color = "#cccccc"
+    selected_item_font = "Unifont Regular 16"
+    selected_item_color = "#ffffff"
+    item_height = 24
+    item_padding = 4
+    item_spacing = 4
+    icon_width = 0
+    icon_height = 0
+    scrollbar = false
+  }
+
+  # Countdown label
+  + label {
+    left = 30%
+    top = 72%
+    width = 40%
+    align = "center"
+    id = "__timeout__"
+    text = "Booting in %d seconds"
+    color = "#cccccc"
+    font = "Unifont Regular 14"
+  }
+  THEME
+''