From 7b47838e5221494cf7186de37292eb7dcfdecbeb Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Cyryl=20P=C5=82otnicki?= <cyplo@cyplo.dev>
Date: Wed, 5 Jul 2023 16:07:48 +0100
Subject: [PATCH] print diff on activation

---
 nixos/common.nix        | 3 +++
 nixos/server-common.nix | 3 +++
 2 files changed, 6 insertions(+)

diff --git a/nixos/common.nix b/nixos/common.nix
index 7ecd3f06..48f32ed8 100644
--- a/nixos/common.nix
+++ b/nixos/common.nix
@@ -107,4 +107,7 @@ in {
   };
 
   system = { inherit stateVersion; };
+  system.activationScripts.diff = ''
+    ${pkgs.nvd}/bin/nvd --nix-bin-dir=${pkgs.nix}/bin diff /run/current-system "$systemConfig"
+  '';
 }
diff --git a/nixos/server-common.nix b/nixos/server-common.nix
index a5f4dca6..6a8149f2 100644
--- a/nixos/server-common.nix
+++ b/nixos/server-common.nix
@@ -12,4 +12,7 @@
     enableNsncd = true;
   };
   system.stateVersion = "22.11";
+  system.activationScripts.diff = ''
+    ${pkgs.nvd}/bin/nvd --nix-bin-dir=${pkgs.nix}/bin diff /run/current-system "$systemConfig"
+  '';
 }