vscode-haskell-linter

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It would be nice to be able to add this parameter --language=. Without this, it is annoying to have quasiquoters in a file. A known work around is to add {-# LANGUAGE QuasiQuotes #-} at the beginning of every file where it is needed, but it becomes redundant when using cabal/stack

The same applies to -XTypeApplications. hlint doesn't work without these settings as well. It would be really nice to have this feature implemented!

Yes, I just hit this limitation with Arrows. I'd prefer that the extension automatically detect my active extensions from my .cabal file, but I'd also be satisfied with the ability to pass the -X flag (ideally on a per-project basis, but I could live with a global setting).

using a .hlint.yaml file in the root of the project allows for this usage

https://github.com/ndmitchell/hlint/blob/master/README.md#customizing-the-hints