From b403a0791ba73728228ae7490aa17481d1191cf7 Mon Sep 17 00:00:00 2001
From: Andreas Zweili <andreas@zweili.ch>
Date: Sat, 27 May 2023 15:38:32 +0200
Subject: [PATCH] Add a command to check the system derivation actually changed

---
 shell.nix | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/shell.nix b/shell.nix
index eba4d3f..ca02796 100644
--- a/shell.nix
+++ b/shell.nix
@@ -1,9 +1,17 @@
 { pkgs ? import <nixpkgs> { } }:
+let
+  nix-refactor = pkgs.writeShellScriptBin "nix-refactor" ''
+    origin=$(${pkgs.coreutils-full}/bin/readlink /run/current-system)
+    result=$(${pkgs.lib.getExe pkgs.nixos-rebuild} build && ${pkgs.coreutils-full}/bin/readlink result)
+    ${pkgs.diffutils}/bin/diff -q <(echo "$origin" ) <(echo "$result")
+  '';
+in
 pkgs.mkShell {
   name = "nixosbuildshell";
   nativeBuildInputs = with pkgs; [
     git
     nixFlakes
+    nix-refactor
     python3
     python310Packages.autopep8
     python310Packages.black
@@ -19,3 +27,4 @@ pkgs.mkShell {
     ''}/bin:$PATH
   '';
 }
+