From ca8b12eb5459a98d5c93728bab4ac9d480731d60 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Jakub=20Ber=C3=A1nek?= <jakub.beranek@vsb.cz>
Date: Tue, 31 Dec 2024 15:38:43 +0100
Subject: [PATCH] Print how to rebless Python formatting in tidy

---
 src/tools/tidy/src/ext_tool_checks.rs | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/src/tools/tidy/src/ext_tool_checks.rs b/src/tools/tidy/src/ext_tool_checks.rs
index 9792650d37d30..e8370a0af027b 100644
--- a/src/tools/tidy/src/ext_tool_checks.rs
+++ b/src/tools/tidy/src/ext_tool_checks.rs
@@ -154,6 +154,9 @@ fn check_impl(
             args.insert(0, "--diff".as_ref());
             let _ = py_runner(py_path.as_ref().unwrap(), true, None, "ruff", &args);
         }
+        if res.is_err() && !bless {
+            eprintln!("rerun tidy with `--extra-checks=py:fmt --bless` to reformat Python code");
+        }
         // Rethrow error
         let _ = res?;
     }