How I use HLS and Emacs LSP mode

• Seems faster than dante on small codebases, though slower on big ones.

How to use

• Turn on HLS/LSP in a buffer: M-x lsp

• Turn off HLS/LSP in a buffer (and in all buffers using the same server): s-l w q

• Restart HLS/LSP in a buffer: s-l w r (although I’m not sure this really works. Turn off and then turn on seems to be better.)

(s- is the “super” key and can be simulated with C-x @ s)

What’s great

Use an identifier that’s not imported. HLS offers to import it for you. I don’t think it can offer to import things that are not in any visible package, which has pros and cons.

Papercuts

• I don’t know how to find all buffers in which LSP is running (in order to turn them off). The buffer called *lsp-log* gives some clues).

• Have to write out a hie.yaml cradle all the time with cradle:\n cabal:, because cradle autodetection in broken.

• Wingman doesn’t give choices: foo n1 n2 = _ doesn’t give choice of n1 or n2. Just fills with n1.