haskell/haskell-ide-engine

hie-wrapper (via coc.nvim) continually crashes

gfarrell opened this issue · 3 comments

gfarrell commented

I'm using coc.nvim as my LSP client (within neovim) -- it works with other languages. I have removed Setup.hs, installed hspec-discover globally to fix problems with HIE, but now I'm at the stage where the server just continually dies and gets restarted.

I have tried a basic hie.yaml in the project root (the project is gfarrell/random-puzzles-hs):

cradle:
  stack:

But this also doesn't work.

> stack ide packages --cabal-files --stdout                                                      
/Users/gideon/projects/challenges/random-puzzles/random-puzzles.cabal

When I look at the output of hie-wrapper (via CocList > output > languageserver.haskell) I get the following (repeated ad nauseam, so I just took a selection):

hie.log

I can't work out why it's continually restarted. I tried hie-wrapper --debug in the project root and got the following output which seems to imply that nothing is wrong with the project:

hie-debug.log

fendor commented

Thank you for your bug report!
I think you may be missing the --lsp flag for hie.

gfarrell commented

Ah finally, thank you. That worked!

Some commentary about this:

  1. I was previously using the config in the Coc Wiki but this wasn't working for me because of the following other issues:
    a. stack new creates Setup.hs which seems to break hie.
    b. I'm using hspec for tests, and hspec-discover has to be globally installed, but this error wasn't showing for me. I found it after solving some other issues.
    c. I kept seeing cabal-install is not installed, even though I'm using stack not cabal (although this is no-longer happening to me even if I remove hie.yaml).
    d. Maybe other issues?
  2. I found this error super hard to debug.
fendor commented

stack new creates Setup.hs which seems to break hie

No, it just cant be loaded, HIE should continue to work.

I'm using hspec for tests, and hspec-discover has to be globally installed,

Yeah, for now it gotta be like that. Until we have abstracted build-tools and have a way to query the path for each tool.

I found this error super hard to debug.

Reasonable, we should add a message to the beginning of the output in HieMain.hs