kakoune-ghci-bridge

An experimental wrapper around ghci to get Haskell intellisense in the Kakoune editor, inspired by jyp's emacs mode dante. A notable exception is that it only loads exactly the saved files in the project rather than making virtual files for unsaved files.

setup

Run python bridge.py SESSION DIR GHCI_CMD

This connects with the kak session using a command for ghci (for example cabal repl) starting in the directory DIR. When running you see some debug output and inside kakoune you get a bunch of commands prefixed with ghci-. It also populates the user keymap with some bindings.

def start-ghci-bridge -params 0..1 -docstring '
    start-ghci-bridge [GHCI_CMD]

    Starts the bridge.py using the GHCI_CMD, default "make ghci"
' %{
    %sh{
        dir=$PWD
        cd ~/code/kakoune-ghci-bridge
        (
            python bridge.py "$kak_session" "$dir" "${1:-make ghci}"
        ) > /dev/null 2>&1 < /dev/null &
    }
}

todo

Completion suggesions.

Background and implementation

Since GHC 8.0.1 ghci has the commands :type-at, :loc-at and :uses (enabled by :set +c), implemented by Chris Done, see phabricator, ghc trac. The kakoune communication technique is a slimmed-down version of libkak. Future work include transforming this into a language server, perhaps built on top of ghcid, see #138.

License

MIT