n8n: only update to stable releases

pkgs/by-name/n8/n8n/package.nix

@@ -13,7 +13,6 @@
   libmongocrypt,
   postgresql,
   makeWrapper,
-  nix-update-script,
 }:
 
 stdenv.mkDerivation (finalAttrs: {
@@ -84,7 +83,7 @@ stdenv.mkDerivation (finalAttrs: {
 
   passthru = {
     tests = nixosTests.n8n;
-    updateScript = nix-update-script { };
+    updateScript = ./update.sh;
   };
 
   dontStrip = true;

pkgs/by-name/n8/n8n/update.sh

@@ -0,0 +1,6 @@
+#!/usr/bin/env nix-shell
+#!nix-shell --pure -i bash -p bash curl jq nix-update cacert git
+set -euo pipefail
+
+new_version="$(curl -s "https://api.github.com/repos/n8n-io/n8n/releases/latest" | jq --raw-output '.tag_name | ltrimstr("n8n@")')"
+nix-update n8n --version "$new_version"