chore: add niv to updates

Signed-off-by: jolheiser <john.olheiser@gmail.com>

apps/default.nix

@@ -1,4 +1,4 @@
-{ pkgs, ... }: {
+{ pkgs, config, ... }: {
   imports = [
     ./bat.nix
     ./bottom.nix
@@ -47,6 +47,9 @@
       # Personal NUR
       nur.repos.jolheiser.tmpl
     ];
+    activation.report-changes = config.lib.dag.entryAnywhere ''
+      ${pkgs.nvd}/bin/nvd --nix-bin-dir=${pkgs.nix}/bin diff $oldGenPath $newGenPath
+    '';
     stateVersion = "22.11";
   };
 

machines/common/default.nix

@@ -52,6 +52,13 @@
     };
   };
 
+  system.activationScripts.diff = {
+    supportsDryActivation = true;
+    text = ''
+      ${pkgs.nvd}/bin/nvd --nix-bin-dir=${pkgs.nix}/bin diff /run/current-system "$systemConfig"
+    '';
+  };
+
   environment = {
     systemPackages = with pkgs; [ podman podman-compose podman-tui ];
   };