From 24a0fca4a94387d1745c9b4759748267525861a7 Mon Sep 17 00:00:00 2001
From: NotAShelf <raf@notashelf.dev>
Date: Tue, 24 Sep 2024 20:25:11 +0300
Subject: [PATCH 1/2] hosts/caesar: disable graphics; add resize script

---
 hosts/caesar/virt.nix | 28 ++++++++++++++++++++++++++--
 1 file changed, 26 insertions(+), 2 deletions(-)

diff --git a/hosts/caesar/virt.nix b/hosts/caesar/virt.nix
index 26ac384..ab850b2 100644
--- a/hosts/caesar/virt.nix
+++ b/hosts/caesar/virt.nix
@@ -1,15 +1,36 @@
 {
-  config,
   modulesPath,
+  config,
+  pkgs,
   ...
-}: {
+}: let
+  # https://unix.stackexchange.com/questions/16578/resizable-serial-console-window
+  resize = pkgs.writeScriptBin "resize" ''
+    if [ -e /dev/tty ]; then
+      old=$(stty -g)
+      stty raw -echo min 0 time 5
+      printf '\033[18t' > /dev/tty
+      IFS=';t' read -r _ rows cols _ < /dev/tty
+      stty "$old"
+      stty cols "$cols" rows "$rows"
+    fi
+  '';
+in {
   imports = [(modulesPath + "/virtualisation/qemu-vm.nix")];
 
+  environment = {
+    systemPackages = [resize];
+    loginShellInit = "${resize}/bin/resize";
+  };
+
   virtualisation = {
     memorySize = 8000;
     diskSize = 200000;
     cores = 8;
 
+    # Try to make this bootable.
+    useBootLoader = true;
+
     # fs
     useDefaultFilesystems = false;
     rootDevice = "/dev/disk/by-label/NIXOS_ROOT";
@@ -25,6 +46,9 @@
       vm0.vlan = 1;
     };
 
+    # The VM will run on a headless machine.
+    graphics = false;
+
     # mac addr can be anything, especially the last 3 bytes
     # the OUI is specific to QEMU
     qemu.networkingOptions = [

From 080212f237c51cf8f9e47838f62f217934f83bbf Mon Sep 17 00:00:00 2001
From: NotAShelf <raf@notashelf.dev>
Date: Tue, 24 Sep 2024 20:25:43 +0300
Subject: [PATCH 2/2] hosts/ceasar: explicitly enable grub

---
 hosts/caesar/default.nix | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/hosts/caesar/default.nix b/hosts/caesar/default.nix
index d84f8bf..4f96f8d 100644
--- a/hosts/caesar/default.nix
+++ b/hosts/caesar/default.nix
@@ -14,8 +14,13 @@ in {
 
     boot = {
       initrd.supportedFilesystems = ["ext4"];
-
       kernelPackages = lib.mkOverride 0 pkgs.linuxPackages_latest;
+
+      loader.grub = {
+        efiSupport = true;
+        efiInstallAsRemovable = true;
+        device = "nodev";
+      };
     };
 
     programs.zsh = {