How to work with extensions that are set in cabal.file?

[anton-k]

But what if I set it in the cabal.file in the default-extensions: section

RecordWildCards language extension is not enabled. Please add {-# LANGUAGE RecordWildCards #-} pragma at the top of your module.

[anton-k]

Is it possible to give path to cabal file for list of extensions to check, or provide extensions in some config file?

[elaforge]

The general mechanism is the .fix-imports file, which can go in the current directory, or you can have a global one in ~/.config/fix-imports. It doesn't have any way to merge those configs, though now that I think of it, that would be a pretty obvious and easy extension. It wouldn't be hard to snarf a list out of a cabal file either, I wouldn't turn down a PR that did something like that! But the way to do it right now without any code changes would be to paste the extension list out into a .fix-imports and then just keep them in sync by hand.