From 3c816b862c2c26bb35ed46953659a9950c38e856 Mon Sep 17 00:00:00 2001
From: Erik Arvstedt <erik.arvstedt@gmail.com>
Date: Sat, 22 Oct 2022 19:37:46 +0200
Subject: [PATCH] tests/vmWithoutTests: poweroff on shell exit

This allows quitting the VM with Ctrl-D like in the minimal example VM.
---
 test/lib/make-test.nix | 10 ++++------
 1 file changed, 4 insertions(+), 6 deletions(-)

diff --git a/test/lib/make-test.nix b/test/lib/make-test.nix
index be8c652..7fce27c 100644
--- a/test/lib/make-test.nix
+++ b/test/lib/make-test.nix
@@ -97,12 +97,10 @@ name: testConfig:
     # Avoid lengthy build of the nixos manual
     documentation.nixos.enable = false;
 
-    # Provide a shortcut for instant poweroff from within the machine
-    environment.systemPackages = with pkgs; [
-      (lowPrio (writeScriptBin "q" ''
-         echo o >/proc/sysrq-trigger
-       ''))
-    ];
+    # Power off VM when the user exits the shell
+    systemd.services."serial-getty@".preStop = ''
+      echo o >/proc/sysrq-trigger
+    '';
 
     system.stateVersion = lib.mkDefault config.system.nixos.release;
   })).config.system.build.vm;