barman: add update script

pkgs/by-name/ba/barman/package.nix

@@ -4,6 +4,7 @@
   fetchFromGitHub,
   python3Packages,
   versionCheckHook,
+  nix-update-script,
 }:
 
 python3Packages.buildPythonApplication rec {
@@ -59,6 +60,15 @@ python3Packages.buildPythonApplication rec {
       "test_get_file_mode"
     ];
 
+  passthru = {
+    updateScript = nix-update-script {
+      extraArgs = [
+        "--version-regex"
+        "^release/(\\d+\\.\\d+\\.\\d+)$"
+      ];
+    };
+  };
+
   meta = {
     description = "Backup and Recovery Manager for PostgreSQL";
     homepage = "https://www.pgbarman.org/";