haskell-language-server

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haskell-template

nix develop: The nix shell is your friend; inside it, you will have the full Haskell development environment (cabal, ghc, ghci, haskell-language-server, cabal-fmt, hlint, etc.).
Philosophy

haskell-language-server (because IDE integration from the get-go is invaluable)
Haskell Language Server and Coc

Haskell has great IDE support via haskell-language-server (HLS).
Getting started

Notice haskell-language-server launching in the footer (you should see “Processing (1/2)”), and wait for it finish.

Test that haskell-language-server works
Flake checks for Haskell

haskell-language-server check (hlsCheck.enable = true) from haskell-flake: Tests that HLS continues to work with the project.

Now you can run the following command^* to run all flake checks locally for the current system:

sandbox is being disabled because of an issue with haskell-language-server.