scripts/boot-nixos-generation: add script

Author: NyCodeGHG

scripts/boot-nixos-generation.sh

@@ -0,0 +1,17 @@
+#!/usr/bin/env bash
+
+if [[ -z "$1" ]]; then
+  echo "Usage: boot-nixos-generation <generation-file>"
+  exit 1
+fi
+
+generation="$1"
+
+kernel="/boot/$(rg '^linux (.+\.efi)' -or '$1' $generation)"
+initrd="/boot/$(rg '^initrd (.+\.efi)' -or '$1' $generation)"
+options="$(rg '^options (.+)' -or '$1' $generation)"
+machine_id="$(rg '^machine-id (.+)' -or '$1' $generation)"
+
+options="$options systemd.machine_id=$machine_id"
+
+qemu-kvm -smp 2 -m 4096 -kernel "$kernel" -initrd "$initrd" -append "$options"