detect-hostname-change: improve installer detection

nix-community · Jan 21, 2025 · 8141ef1 · 8141ef1
1 parent db87013
commit 8141ef1
Showing 1 changed file with 5 additions and 2 deletions.
diff --git a/nixos/common/detect-hostname-change.nix b/nixos/common/detect-hostname-change.nix
@@ -13,13 +13,16 @@
 
   config = lib.mkIf (config.srvos.detect-hostname-change.enable && config.networking.hostName != "") {
     system.preSwitchChecks.detectHostnameChange = ''
+      actual=$(< /proc/sys/kernel/hostname)
+
       # Ignore if the system is getting installed
-      if [[ ! -e /run/current-system ]]; then
+      # https://github.com/nix-community/nixos-anywhere/blob/97b45ac774699b1cfd267e98a8bdecb74bace593/src/get-facts.sh#L12
+      if grep -Eq 'VARIANT_ID="?installer"?' /etc/os-release || [[ ! -e /run/current-system ]]; then
         exit
       fi
 
-      actual=$(< /proc/sys/kernel/hostname)
       desired=${config.networking.hostName}
+
       if [[ "$actual" = "$desired" ]]; then
         exit
       fi