who needs temporary files and tee and whatever when you can have BASH SCRIPTS :3

configs/common.nix

@@ -196,11 +196,6 @@ in
     };
   };
 
-  system.activationScripts."upgrade-diff" = {
-    supportsDryActivation = true;
-    text = "${lib.getExe pkgs.nvd} --nix-bin-dir=${config.nix.package}/bin diff /run/current-system $systemConfig 1>&2";
-  };
-
   systemd = {
     services.NetworkManager-wait-online.enable = lib.mkForce false;
 

flake.nix

@@ -31,7 +31,6 @@
               agenix.packages.${system}.default
               just
               nixfmt-rfc-style
-              nvd
               statix
             ];
           };

justfile

@@ -5,17 +5,7 @@ check:
     nix flake check
 
 switch *args:
-    #!/usr/bin/env bash
-    set -euo pipefail
-    configuration=$(sudo nixos-rebuild dry-activate --flake . --keep-going {{args}})
-    echo $configuration
-    read -n1 -p "Activate new configuration? [y/N] " answer
-    if [[ $answer =~ ^[Yy]$ ]]; then
-      sudo "$configuration/bin/switch-to-configuration" switch
-    else
-      echo "Not activating :("
-      exit 1
-    fi
+    bash switch.sh {{args}}
 
 rollback:
     sudo nixos-rebuild switch --rollback
@@ -27,21 +17,8 @@ deploy system user="leo":
     #!/usr/bin/env bash
     set -euo pipefail
     flake=$(nix eval --impure --raw --expr "(builtins.getFlake \"git+file://$PWD\").outPath")
-    sshout=$(mktemp)
-
     nix copy "$flake" --to "ssh://{{user}}@{{system}}"
-    ssh -t "{{user}}@{{system}}" "sudo nixos-rebuild dry-activate --flake $flake --keep-going" | tee "$sshout"
-    configuration=$(tail -n1 "$sshout" | grep -Po "/nix/store/[\w\d\.\-]+")
-    echo "$configuration"
-    rm "$sshout"
-
-    read -n1 -p "Activate new configuration? [y/N] " answer
-    if [[ $answer =~ ^[Yy]$ ]]; then
-      ssh -t "{{user}}@{{system}}" "sudo \"$configuration/bin/switch-to-configuration\" switch"
-    else
-      echo "Not activating :("
-      exit 1
-    fi
+    ssh -t "{{user}}@{{system}}" "bash $flake/switch.sh"
 
 lint *args:
     statix check -i flake.nix **/hardware-configuration.nix {{args}}

switch.sh

@@ -0,0 +1,20 @@
+#!/usr/bin/env bash
+set -euo pipefail
+
+script_path=$(readlink -f "${BASH_SOURCE[0]}")
+flake=$(dirname "$script_path")
+
+configuration=$(sudo nixos-rebuild dry-activate --flake "$flake" --keep-going "$@")
+echo "$configuration"
+
+nix run --inputs-from "$flake" nixpkgs#nvd -- diff /run/current-system "$configuration"
+
+read -n1 -rp "Activate new configuration? [y/N] " answer
+echo
+
+if [[ $answer =~ ^[Yy]$ ]]; then
+  sudo "$configuration/bin/switch-to-configuration" switch
+else
+  echo "Not activating :("
+  exit 1
+fi