feat: add upgrade-diff.nix

ajaxbits · Nov 3, 2023 · 06b3d3f · 06b3d3f
1 parent 1b3ebf1
commit 06b3d3f
Show file tree

Hide file tree

Showing 2 changed files with 18 additions and 0 deletions.
diff --git a/common/default.nix b/common/default.nix
@@ -3,6 +3,7 @@
     ./git.nix
     ./nix.nix
     ./fish.nix
+    ./upgrade-diff.nix
   ];
 
   config = {

diff --git a/common/upgrade-diff.nix b/common/upgrade-diff.nix
@@ -0,0 +1,17 @@
+# MIT Jörg Thalheim - https://github.com/Mic92/dotfiles/blob/c6cad4e57016945c4816c8ec6f0a94daaa0c3203/nixos/modules/upgrade-diff.nix
+{
+  config,
+  pkgs,
+  ...
+}: {
+  system.activationScripts.diff = {
+    supportsDryActivation = true;
+    text = ''
+      if [[ -e /run/current-system ]]; then
+        echo "--- diff to current-system"
+        ${pkgs.nvd}/bin/nvd --nix-bin-dir=${config.nix.package}/bin diff /run/current-system "$systemConfig"
+        echo "---"
+      fi
+    '';
+  };
+}