From 813a3fd019265d6dde1ee23738d8c7b9a974564d Mon Sep 17 00:00:00 2001
From: "Lennart J. Kurzweg (Nx2)" <git@nx2.site>
Date: Sun, 7 Jul 2024 22:47:49 +0200
Subject: [PATCH] boot with windows entry

---
 system-modules/boot.nix | 54 +++++++++++++++++++++++++++++++++++++++--
 1 file changed, 52 insertions(+), 2 deletions(-)

diff --git a/system-modules/boot.nix b/system-modules/boot.nix
index 35333e0..ed5c1d2 100755
--- a/system-modules/boot.nix
+++ b/system-modules/boot.nix
@@ -1,4 +1,4 @@
-{ config, pkgs, host, inputs, ... }: 
+{ config, pkgs, lib, host, inputs, ... }: 
 let 
   grub-theme-ascii-diana = (pkgs.fetchFromGitea {
      domain = "git.nx2.site";
@@ -17,14 +17,64 @@ in
       
     environment.systemPackages = with pkgs; [ sbctl ];
     boot = {
-      lanzaboote = {
+      lanzaboote = 
+      let
+        windows-efi-shell-fs-alias = "HD0a65535a2"; 
+      in
+       {
         enable = true;
         pkiBundle = "/etc/secureboot";
+        package = lib.mkForce (pkgs.writeShellApplication {
+          name = "lzbt";
+          runtimeInputs = [
+            inputs.lanzaboote.packages.x86_64-linux.tool
+            pkgs.coreutils
+            pkgs.sbctl
+          ];
+          # https://forum.endeavouros.com/t/tutorial-add-a-systemd-boot-loader-menu-entry-for-a-windows-installation-using-a-separate-esp-partition/37431
+          text = /*bash*/ ''
+            # execute normal lanazboote functionality
+            lzbt "$@"
+
+            # Create windows.nsh file 
+            ESP='${config.boot.loader.efi.efiSysMountPoint}'
+            echo "${windows-efi-shell-fs-alias}:EFI\Microsoft\Boot\Bootmgfw.efi" > "$ESP/windows.nsh"
+            
+            # cp efi-shell boot file
+            # systemd-boot will automatically add an entry for it 
+            cp -f '${pkgs.edk2-uefi-shell.efi}' "$ESP/shellx64.efi"
+            # should exist already
+            mkdir -p "$ESP/loader/entries"
+            # sign shell file
+            sbctl sign -s "$ESP/shellx64.efi"
+            # Create windows.conf boot entry
+            cat << EOF > "$ESP/loader/entries/windows.conf"
+            title   Windows-Hack
+            efi     /shellx64.efi
+            options -nointerrupt -noconsolein -noconsoleout windows.nsh
+            EOF
+          '';
+        });
       };
       loader.systemd-boot = {
         enable = false; # let lanzaboote install systemd-boot
         consoleMode = "max";
         configurationLimit = 10;
+        # extraEntries = {
+        #   "Windo7s-11.conf" = ''
+        #     Windows eleven
+        #     search --file --no-floppy --set=root /EFI/Microsoft/Boot/bootmgfw.efi
+        #     chainloader (''${root})/EFI/Microsoft/Boot/bootmgfw.efi
+        #   '';
+        #   "Firmware.conf" = ''
+        #     Firmware
+        #     fwsetup
+        #   '';
+        #   "Shutdown.conf" = ''
+        #     title Shutdown
+        #     halt
+        #   '';
+        # };
       };
       # kernelPackages = pkgs.linuxPackages_latest;
       extraModulePackages = with config.boot.kernelPackages; [ v4l2loopback ];