[Problem] Getting two hover menus, sometimes - Conflict with mason-lspconfig

[Ciel-MC]

I'm trying learning haskell and trying to do my editor setup, but it seems like when I try to K something, the plugin's hover pops up, but sometimes there's a second one that sometimes shows the type? And if I press K again I go into that one instead of the one that has actions. I see that it's from HLS but I can't have that not launch because then things like formatting don't work, and for some reason if I let it start and then kill it, things seem to work fine, format is there and the extra hover menu isn't, I'm using mason + lspconfig + mason-lspconfig, please lmk if there's some known conflicts here, thanks

[mrcjkb]

Hey 👋

This looks like a conflict caused by mason-lspconfig,
which sets up the lspconfig.hls LSP client configuration. As a result, you have two LSP clients attached to the buffer.

You can confirm this with :checkhealth haskell-tools.

To solve this, you have to either disable the lspconfig.hls configuration or configure mason-lspconfig to not set it up.

[Ciel-MC]

That's what I guessed as well, and I tried just returning early like this, but it seems also make hs-tools not be able to start up the server 😅, do you mind telling me what the right way to do it is?

[Ciel-MC]

Alright I figured it out, since ht-tools is using the system install, there was no point in having hls installed with Mason in the first place, uninstalling that fixed the issue(though I would like to see a possible integration to use mason's version so a local install is not required).

[mrcjkb]

If you add haskell-language-server to mason.nvim's ensure_installed option, it should pick it up automatically.
At least it seems to work in a LazyVim PR someone requested.

I don't support mason explicitly, but if it doesn't pick up hls, you can specify the command with the vim.g.haskell_tools.hls.cmd option (see :h haskell-tools.config).