Is there a way to get an nREPL message log?

[PEZ]

Hi! Thanks for providing REPL-y!

I'm debugging an nREPL related issue with Calva and use REPL-y for comparison when I want to remove Calva from the picture. In trying to figure out what REPL-y and Calva might be doing differently it would help a lot with a log of the nREPL messages sent and recieved from REPL-y. Is it possible to enable such a thing? And, if so, how do I do it?

[trptcolin]

It’s been a long time since I worked on this but I know there’s a concept of nrepl middleware at the nrepl server side - wonder if that could be helpful here? I don’t think there’s anything built in afaik, but I imagine for debugging purposes you could try tweaking https://github.com/trptcolin/reply/blob/main/src/clj/reply/eval_modes/nrepl.clj to add some println or something?

[PEZ]

Thanks! I'll have a look.

[bbatsov]

Experience has taught me that it's much easier to have this logging on the client side, than on the server. :-) See also https://github.com/nrepl/nrepl/issues/85 and https://github.com/lambdaisland/nrepl-proxy

[PEZ]

OMG. This in the announcements channel over at Clojurians slack an hour ago:

[bbatsov]

@PEZ Coincidence or providence? ;-) (see https://github.com/lambdaisland/nrepl-proxy/issues/1)

[PEZ]

Haha, I see what you did there.