[clang-tools-extra] [clang-tidy] support query based custom check (PR #131804)

[Baranov Victor via cfe-commits]

vbvictor wrote:

Thank you for the investigation and report! As it appears, someone else too had similar issues (https://github.com/llvm/llvm-project/pull/159547#issuecomment-3524039290).

Since the issue is inside the Tooling library (which clang-tidy is consumer of), it may require some effort and time to fix properly. There is some issues considering weird behavior with compiler database (like https://github.com/llvm/llvm-project/issues/148819, https://github.com/llvm/llvm-project/issues/148814) which we should hopefully fix eventually.


If you wish, please open PR with the hotfix; otherwise, I'll try to do it (hopefully before 22th branching take place)

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I wonder if changing the name of test file from `main.cpp` to something unique like `clang-tidy-query.cpp` will solve the issue because the algorithm will fail to find flags for non-existent file in `compile_commands.json`

https://github.com/llvm/llvm-project/pull/131804