GHCup isn't installed error: When opening vscode through app launcher (and not command line)

[twitu]

Your environment

Which OS do you use:
Ubuntu
Which LSP client (editor/plugin) do you use:
VS code + vscode-haskell
Describe your project (alternative: link to the project):
*.cabal and stack file

Steps to reproduce

Opening two haskell projects on vs-code causes the hls to fail on the second project. I can reproduce by opening one project. Then opening a new vscode window and opening another haskell project.

Expected behaviour

hls should work on both projects

Actual behaviour

hls fails to start on the second project. Specifically the haskell extension fails to find ghcup for some reason. Below is the error message.

Project requires GHCup but it isn't installed

Include debug information

haskell-language-server version: 1.7.0.0 (GHC: 9.2.2) (PATH: /home/twitu/.ghcup/hls/1.7.0.0/lib/haskell-language-server-1.7.0.0/bin/haskell-language-server-wrapper)
Tool versions found on the $PATH
cabal:          3.6.2.0
stack:          2.7.5
ghc:            8.10.7

Happy to share anything else needed.

[michaelpj]

Project requires GHCup but it isn't installed

I think this message comes from the VSCode extension, so I'm transferring the issue over there.

[hasufell]

Can you share the logs for both instances?

https://github.com/haskell/vscode-haskell#investigating-and-reporting-problems

[twitu]

Sharing the logs from above instructions here.

This project works.

2022-07-19 04:45:20.6430000 [client] DEBUG Environment variables:
2022-07-19 04:45:20.6430000 [client] DEBUG   PATH: /home/twitu/.opam/default/bin:/home/twitu/.cargo/bin:/usr/local/bin:/home/twitu/opt/usr/local/bin:/home/twitu/.local/share/coursier/bin:/home/twitu/.ghcup/bin:/home/twitu/.cabal/bin
2022-07-19 04:45:20.6430000 [client] INFO Finding haskell-language-server
2022-07-19 04:45:20.6520000 [client] INFO Checking for ghcup installation
2022-07-19 04:45:20.6590000 [client] INFO found ghcup at ghcup

This doesn't work.

2022-07-19 04:45:39.2110000 [client] DEBUG Environment variables:
2022-07-19 04:45:39.2110000 [client] DEBUG   PATH: /home/twitu/.local/share/solana/install/active_release/bin:/home/twitu/.cargo/bin:/home/twitu/.local/bin:/home/twitu/bin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin
2022-07-19 04:45:39.2110000 [client] INFO Finding haskell-language-server
2022-07-19 04:45:39.2210000 [client] INFO Checking for ghcup installation
2022-07-19 04:45:41.4550000 [client] ERROR Error: Project requires GHCup but it isn't installed

I think it's because in the second project the environment variables are somehow missing the ghcup path. I'm not sure how or why this is happening, I haven't made any special changes to vscode settings for the second project, it's a fresh window exactly as the first.

[hasufell]

Maybe you're opening one from terminal and the other not.

[twitu]

I'm launching both vscode using an app launcher. But now that you mentioned it, I tried launching from the terminal which makes everything work fine.

Weird thing this app launcher is doing to the path. But anyways this isn't a hls issue for sure now. Thanks for the pointers.

[hasufell]

Also see https://github.com/haskell/vscode-haskell#stackcabalghc-can-not-be-found

[twitu]

🤦‍♂️ I'll rename the issue so that it's easier to find it, in case somebody missed this documentation like me.