generation 580 25.11.20250714.62e0f05

home/scripts/nix-diff.sh

@@ -0,0 +1,26 @@
+#!/usr/bin/env bash
+# shows what changed between the current and previous NixOS generation
+
+PROFILE="/nix/var/nix/profiles/system"
+
+# current generation number from the profile symlink (e.g. system-185-link)
+current_gen=$(readlink "$PROFILE" | grep -oP '\d+')
+prev_gen=$((current_gen - 1))
+
+current=$(readlink -f "${PROFILE}-${current_gen}-link")
+previous=$(readlink -f "${PROFILE}-${prev_gen}-link")
+
+if [ ! -e "${PROFILE}-${prev_gen}-link" ]; then
+  echo "Previous generation ($prev_gen) not found (garbage collected?)."
+  exit 1
+fi
+
+echo -e "\033[1mGen $prev_gen:\033[0m $previous"
+echo -e "\033[1mGen $current_gen:\033[0m $current"
+echo
+
+if command -v nvd &>/dev/null; then
+  nvd diff "$previous" "$current"
+else
+  nix store diff-closures "$previous" "$current"
+fi