[clang-tools-extra] [clang-tidy] Header check support for check_clang_tidy.py (PR #175735)

[via cfe-commits]

================
@@ -292,26 +355,77 @@ def check_notes(self, clang_tidy_output: str) -> None:
             try_run(
                 [
                     "FileCheck",
-                    "-input-file=" + notes_file,
+                    f"-input-file={notes_file}",
                     self.input_file_name,
-                    "-check-prefixes=" + ",".join(self.notes.prefixes),
+                    f"-check-prefixes={','.join(self.notes.prefixes)}",
                     "-implicit-check-not={{note|warning|error}}:",
                 ]
             )
 
+    def check_header_messages(self, clang_tidy_output: str) -> str:
----------------
zeyi2 wrote:

`check_header_messages` implements the diagnostic splitting logic. It iterates through the raw `clang-tidy` output and acts as a dispatcher.


https://github.com/llvm/llvm-project/pull/175735