Fail on initialisation error & Cannot find module error

[yeomjy]

Hi, I'm using Haskell Language Server extension 0.0.37 on Arch Linux. I'm using ghc-8.8.2 with stack(lts-15.3).
And I installed hie-8.8.2 by Aura(https://github.com/haskell/haskell-ide-engine#installation-on-arch-linux)

First error is:
I used stack new command for making new project directory. And I opened folder at vscode.
Extension successfully worked with app/Main.hs and src/Lib.hs which were made by stack new command.
But Extension doesn't worked with test/Spec.hs and Setup.hs.
Error Message Is:
Fail on initialisation for "/home/junyoung/Haskell/new-project/test/Spec.hs". Could not obtain flags for: "test/Spec.hs". This module was not part of any component we are aware of. Component: ChLibName ChMainLibName with source directory: ["src"] Component: ChExeName "new-project-exe" with source directory: ["app"] To expose a module, refer to: https://docs.haskellstack.org/en/stable/GUIDE/ If you are usingpackage.yamlthen you don't have to manually expose modules. Maybe you didn't set the source directories for your project correctly.
same error messages for Setup.hs.

I think this extension only work with code that makes executable file, How can I use this extension with Setup and test code files?

And the Second Error is:
I made my own module and named it NewModule. Placed It in same director(lib) and imported it in Lib.hs like this.

module Lib
    ( someFunc
    ) where

import NewModule

Then a red underline appeared at "import NewModule"
Error message is:
Could not find module ‘GS’ Use -v (or:set -vin ghci) to see a list of the files searched for
but ghci and stack build worked normally. Why this error message happens?

[fendor]

You can not use this extension for files like Setup.hs. However, the loading of test-components is a known issue and discussed in haskell/haskell-ide-engine#1564.
TLDR; Execute stack test before opening the project with hie, then it ought to work.

[yeomjy]

Thank you.

[jneira]

Tracked in the hie issue linked above