0.1 errors when opening VSCode

[DavSanchez]

Hi guys!

Congratulations for this project. Hope it becomes the tool of our dreams to work with Haskell!

I'm trying haskell-language-server and I have encountered this issue, where it returns an error about not finding the module and there is a "Processing 1/2" indicator at the status bar that won't finish, as in the image below.

Obviously it's not working. Hover, formatting... nothing. It's just stuck there.

The instructions done to install this were:

git clone https://.../haskell/haskell-language-server.git --recurse-submodules
cd haskell-language-server
git checkout 0.1
stack ./install.hs hls-8.8.3

The settings for VSCode are only:

{
  "languageServerHaskell.formattingProvider": "ormolu",
  "languageServerHaskell.hieVariant": "haskell-language-server"
}

And the project itself is one generated with stack new <template>, unmodified apart from setting a git repo.

What could this be? Am I doing something wrong? Thanks in advance!

[Avi-D-coder]

This is unfortunately expected behavior for the time being. #88 is not yet ready for use.

For the time being please install and run implicit-hie.
It will generate an hie.yaml config file and everything will work.

PS: I will be discussing getting hie/hls/ghcide installed and working with cabal and stack on the weekly haskell video chat at 5 PM UTC tomorrow(Saturday).

[fendor]

@DavSanchez Can you please post the full log? Imo, this is not expected behaviour.
Also, as a quicker work-around to this problem, you may write a hie.yaml file. A rought introduction: https://github.com/haskell/haskell-ide-engine#project-configuration

For a simple stack project, a hie.yaml with the contents:

cradle:
  stack:

should suffice. Place this in the root of your project and also make sure to open the project root when starting the lsp-client.

[DavSanchez]

Ah, I had a hie.yaml created from the available ones from this repo, and I just realised I had left an uncommented path and component there that was not present in my project structure (was referring to haskell-language-server component, from the original file). Now the process unstuck and it works, sorry!

Just in case it gives you any more information you can use, the log is the following:

[client] run command = "haskell-language-server-wrapper --lsp"
[client] debug command = "haskell-language-server-wrapper --lsp"
ghcide version: 0.1.0.0 (GHC: 8.8.3) (PATH: /.../.local/bin/haskell-language-server-wrapper) (GIT hash: 019b028)
ghcide version: 0.1.0.0 (GHC: 8.8.3) (PATH: /.../.local/bin/haskell-language-server-8.8.3) (GIT hash: 019b028)
Starting (haskell-language-server)LSP server...
with arguments: Arguments {argLSP = True, argsCwd = Nothing, argFiles = [], argsVersion = False, argsShakeProfiling = Nothing, argsTesting = False, argsExamplePlugin = False, argsDebugOn = False, argsLogFile = Nothing, argsThreads = 1}
with plugins: [PluginId "brittany",PluginId "floskell",PluginId "ghcide",PluginId "ormolu",PluginId "pragmas"]
If you are seeing this in a terminal, you probably should have run ghcide WITHOUT the --lsp option!
Started LSP server in 0.00s
2020-05-09 18:10:52.393533 [ThreadId 9] - Opened text document: file:///.../htgeobot/src/Lib.hs
Consulting the cradle for "/.../htgeobot/src/Lib.hs"
Error parsing targets: Unknown local package: haskell-language-server
Note that to specify options to be passed to GHCi, use the --ghci-options flag
2020-05-09 18:10:52.786702 [ThreadId 44] - Plugin.makeCodeLens (ideLogger)
/.../htgeobot/.stack-work/install/x86_64-osx/e65fb45fb2f681541018788623ee2651c5c0fbe15135afc7c7153784047a1a27/8.8.3/pkgdb:/.../.stack/snapshots/x86_64-osx/e65fb45fb2f681541018788623ee2651c5c0fbe15135afc7c7153784047a1a27/8.8.3/pkgdb:/.../.stack/programs/x86_64-osx/ghc-8.8.3/lib/ghc-8.8.3/package.conf.d
haskell-language-server-8.8.3: CradleError (ExitFailure 1) ["Failed to parse result of calling stack","Error parsing targets: Unknown local package: haskell-language-server","Note that to specify options to be passed to GHCi, use the --ghci-options flag"]

The ... stands for my $HOME directory.

I'll need to read a little bit more on how the syntax for components defined at hie.yaml works.

Thanks!