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

[Baranov Victor via cfe-commits]

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@@ -196,15 +210,36 @@ def get_prefixes(self) -> None:
             )
         assert expect_diagnosis or self.expect_no_diagnosis
 
+    def _sanitize_content(self, text: str) -> str:
+        return re.sub("// *CHECK-[A-Z0-9\\-]*:[^\r\n]*", "//", text)
+
+    def _filter_prefixes(self, prefixes: Sequence[str], check_file: str) -> List[str]:
+        if check_file == self.input_file_name:
+            content = self.input_text
+        else:
+            with open(check_file, "r", encoding="utf-8") as f:
+                content = f.read()
+        return [p for p in prefixes if p in content]
+
     def prepare_test_inputs(self) -> None:
         # Remove the contents of the CHECK lines to avoid CHECKs matching on
         # themselves.  We need to keep the comments to preserve line numbers while
         # avoiding empty lines which could potentially trigger formatting-related
         # checks.
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vbvictor wrote:

Can we make this comment as description of new method

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