Haskell Development in Emacs

haskell-mode

• basic haskell integration
• only static integration
• knows basic library functions

interactive-haskell-mode

• makes use of running ghci session
• gets all signatures from ghci
• parses ghci output

nix-haskell-mode

• adapter for running ghci in nix-shell
• needs annoying reload ritual when dependencies change

emamux-ghci

• stale since 2015
• can run ghci session inside of tmux

ghc-mod

• officially dead
• needs ghc-mod executable
• had hole-based programming before ghci
• had case splitting
• was used and then replaced by hie

ghcid

• running ghci session
• filesystem watcher to auto reload
• can specify ghci commands to run after successfull reload
• can evaluate expressions in comments

intero

• officially dead
• very easy setup
• utilized flycheck for linting
• integrated with eldoc
• had issues with nix
• limited to stack projects

dante

• fork of intero
• not limited to stack
• frontend for ghci
• has nix support
• couldn’t get it to work
• eval code in comments

HaRe

• stale since 2017
• refactoring tool
• doesn’t work with ghc 8

structured-haskell-mode

• stale since 2018
• could not get it to work with current haskell mode
• paredit-style strutured editing
• case splitting for simple sum types
• Features

lsp-haskell

haskell-ide-engine - hie

• official haskell LSP server
• has been around before LSP was a thing
• dev effort moved to haskell-language-server
• continued monthly releases

ghcide

• develloped by digital asset
• used in emacs as hie replacement

haskell-language-server - hls

• merger of hie and ghcide
• currently not as feature complete as hie
• advertises more features than ghcide
• although some I didn’t get to work