Does anyone has issue with autocompletion with the newest cider, clojurescript and shadow-cljs? I get a null pointer exception.

Hi all. How to create new file/namespace from within cider?

Hey. Shadow-cljs, latest cider - when I cider-connect to an nrepl port, all seems well and I get a repl in Emacs, however, all commands from a src buffer give me: user-error: No cljs REPLs in current session...

Doing a jack-in works fine.

@phil638 Are you using shadow-cljs 2.10? There were some big changes to its internals, so it might be something related to that. There hasn’t been any recent changes on CIDER’s end with respect to shadow and cljs in general.

Ah, I'm only on 2.8.110 - would you recommend 2.10 instead?

From a cider point of view, I mean.

Well, it shouldn’t make much of a difference but you can always try.

The error you got seems to indicate something went wrong in the REPL init process, which might be related to something wrong in shadow. Not sure.

Cool - I'll do some poking around. Thanks for the input.

@bozhidar I'm finding cider--match-repl-type is seeing pending-cljs when it's looking for cljs.

So that buffer gets filtered out in cider-repls.

the buffer should be set to cljs when it connects to a running app, either node or the browser. has this happened yet?

It has, yea.

I can js/alert from the cider repl itself.

With no issues.

and what is cider-repl-type in that buffer?

the repl buffer i mean

pending-cljs

it never got set then i guess. there's a bit of a complicated state tracker in there

In elisp?

In Clojure. 🙂 cider-nrepl

But it’s not complicated actually - all it checks for is the presence of a piggieback session, nothing more.

i would probably toggle nrepl message logging and then restart the repl. then watch the messages in startup and watch for the repl-type keyword

nrepl-toggle-message-logging and see if this message comes:

(<--
  id                 "10"
  session            "f042944b-6101-46a7-a80f-653115475bfb"
  time-stamp         "2020-06-05 11:23:59.380273000"
  changed-namespaces (dict ...)
  repl-type          "cljs"
  status             ("state")
)

that's how the pending gets upgraded to cljs

https://github.com/clojure-emacs/cider-nrepl/blob/master/src/cider/nrepl/middleware/track_state.clj#L185

Almost every time someone experienced this problem it turned out that this cljs check wasn’t working.

I see this in the messages, could it be relevant?:

(<-- id "10" op "version" session "e51ed50e-32bb-4ec6-8951-d3600453a82e" time-stamp "2020-06-05 17:31:05.659201954" status ("done" "unknown-op" "error") )

(I never see the "state" message, btw)

sounds like a bad nrepl server then. i think everyone should be able to respond to version?

Ok, what's the helpful thing for me to do, raise a bug with all of this information?

Like I said, jack-in works fine.

why does jack-in work in a cljs project?

how are you starting your project?

cider-jack-in-cljs specifically.

ok. that ensures that cider-nrepl is present. how are you starting up your app?

The thing that's not working is cider-connect-cljs to a shadow-cljs watch dev.

understood

it sounds like you are missing the cider-nrepl middleware from your classpath

look in your *Messages* buffer for how CIDER starts up the shadow-cljs server

it will include the cider-nrepl middleware

Yep, you nailed it. If I include cider-nrepl in my deps it works.

Thanks for helping me debug that!

but this should probably be a ticket/issue. CIDER should handle the lack of cider-nrepl gracefully if missing features

I'll update the docs as a starter.

Raised a PR.