[clang-tools-extra] Add option to exclude headers from clang-tidy analysis (PR #91400)

[Piotr Zegar via cfe-commits]

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@@ -564,7 +564,8 @@ void ClangTidyDiagnosticConsumer::checkFilters(SourceLocation Location,
   StringRef FileName(File->getName());
   LastErrorRelatesToUserCode = LastErrorRelatesToUserCode ||
                                Sources.isInMainFile(Location) ||
-                               getHeaderFilter()->match(FileName);
+                               (getHeaderFilter()->match(FileName) &&
+                                !getExcludeHeaderFilter()->match(FileName));
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PiotrZSL wrote:

would be nice to omit checking ExcludeHeaderFilter if it's not set.

https://github.com/llvm/llvm-project/pull/91400