I was just about to ask about this in the hls pr, many thanks!
Have you checked it works with the plugin?

Yes, I built it via npm install, launched vscode and pressed f5 which launches a new vscode editor and then i opened a simple project in this editor and checked to see whether I could format a cabal file.
Cabal files are briefly underlined red upon opening them as they treated as haskell files by hls which I still need to fix.

nice, thank for the info, good to merge then

@jneira Please don't forget that this PR must not be published unless haskell/haskell-language-server#2047 has been merged, otherwise we will display errors for all users. We should probably write that down somewhere?

Maybe we also should think about a backwards compat story, as people might not immediately upgrade their HLS version to the latest available.

Hmm you are rigth, thanks for noting it. Could we do some change in the hls part (or the extension) to avoid those errors? To investigate.
Will do a release without this change in the meanwhile.

I think we can check in the vscode plugin for the version of the hls and hls-wrapper version to launch and conditionally enable loading of cabal files.