VSC Extension can't find GHC when installed with GHCup

[SMC242]

Your environment

Output of haskell-language-server --probe-tools or haskell-language-server-wrapper --probe-tools:

bash: haskell-language-server-wrapper: command not found

Which OS do you use:
Manjaro
Which lsp-client do you use:
Code OSS
Describe your project (alternative: link to the project):
It's a standalone file
Contents of hie.yaml:
I don't have one

Steps to reproduce

1. Install "Haskell Language Server" on Code OSS
2. Install GHCup
3. Run ghcup set ghc 8.10.7
4. Load a .hs file in Code OSS

Expected behaviour

The extension should run

Actual behaviour

I get a toast saying "Project requires GHC but it isn't installed". ghc --version runs fine in a terminal and .ghcup/bin/ is in my PATH so I don't know what to do

This error didn't occur previously when I had installed GHC 9.0.1-4 via pacman. I wanted to switch to version 8.10.7 for better support

Include debug information

Execute in the root of your project the command haskell-language-server --debug . and paste the logs here:

Debug output:

bash: haskell-language-server: command not found

Paste the logs from the lsp-client, e.g. for VS Code

LSP logs:

[client][ERROR] Error executing '/home/eilidh/.config/Code - OSS/User/globalStorage/haskell.haskell/haskell-language-server-wrapper-1.4.0-linux --project-ghc-version' with error code 1
[client][ERROR] stderr: No 'hie.yaml' found. Try to discover the project type!
Cradle requires ghc but couldn't find it
Cradle {cradleRootDir = "/home/eilidh/Desktop/coding/playgrounds/haskell", cradleOptsProg = CradleAction: Default}

[jneira]

Hi, i think the cause might be the env loaded in gui apps dont use the same setup file than the cli (.bashrc). The file actually used could be /etc/profile and source .bashrc usually fix the issue.
See #236 for more info including some other workarounds than modify etc/profile:

• open vscode within the shell konwn to have the correct path
• open vscode with --force-user-env option

[SMC242]

I have added it to my /etc/profile like so:
PATH=$PATH:$HOME/eilidh/.ghcup/bin :/

I will try the other solutions later

[jneira]

have you restarted your windows session?

this environment is static, so simply modifying the .profile file is usually not enough, it also requires a logout/login from the X session (this is also valid for your terminal unless it is configured to use login shells)

see #236 (comment)

[SMC242]

Yes. When I restart, .ghcup/bin is still in my PATH but the extension fails to load

[SMC242]

The hie.yaml workaround fixed it for me. This is not a good fix as I want to just open a .hs file and have the extension work. It doesn't make sense to have to make a config file for little scripts

As others have said, it makes sense to have a GHCup directory setting

[jneira]

hmm, but hls for scripts uses directly ghc and you have ghc installed and available in PATH. I wonder if you have stack installed using another method and it is available for vscode but ghc and cabal are not.

[jneira]

As others have said, it makes sense to have a GHCup directory setting

Yeah, we have plans to add such option and use it for install/set the appropiate tools for the project at hand: haskell/vscode-haskell#483

Anyways i think we can close this one, as it is essentially the problem described in #236. Feel free to comment there any thought or suggestion. Thanks for reporting the issue!