chris_johnson: Yes, thanks for catching that. :)

no problem

so I’m sure I’m still just missing something simple

What's your issue?

but I’m trying to just run a really simple Reagent project in my beloved emacs/CIDER environment and when I follow those instructions, after M-x cider-jack-in-clojurescript I get CompilerException java.lang.ClassNotFoundException: weasel.repl.websocket, compiling:(path/to/ugly/filename.clj)

I’ve come so far but googling for that leads mainly to a Reddit thread where someone is asking about setting up vim-fireplace with Figwheel 😐

Hm

I know that the landscape is very much in flux, and I have not been keeping up with it as well as I’d like, so maybe what I’m trying to do still can’t be done

I am on 0.10.0snapshot of CIDER and cider-nrepl

It certainly can be done

but it's possible I've misconfigured something

is weasel in your deps?

it is

What happens if you start a regular cider-jack-in, and then evaluate (weasel.repl.websocket/repl-env :ip "127.0.0.1" :port 9001) at the repl?

` :dependencies [[org.clojure/clojure "1.7.0"] [org.clojure/clojurescript "0.0-3308"] [reagent "0.5.0"] [weasel "0.6.0"] [com.cemerick/piggieback "0.2.1”]]` that’s my deps form from project.clj

aaaand backtick doesn’t work across lines :d’oh:

It's ok

I got the gist ;)

ClassNotFoundException weasel.repl.websocket java.net.URLClassLoader.findClass (URLClassLoader.java:381)

Ok, and what if you (require 'weasel.repl.websocket)?

If that also fails, then there's something fishy going on

Since weasel is clearly in your deps

>_<

that was uh

the problem

That fixed it?

or at least it returned #weasel.repl.websocket.WebsocketEnv{:ip "127.0.0.1", :port 9001}

hm

ok

then I guess I've misconfigured the feature :)

Hold on

Actualy, before I jump to conclusions, evaluate this on the repl, and tell me if it gives you a cljs repl:

(cemerick.piggieback/cljs-repl (weasel.repl.websocket/repl-env :ip "127.0.0.1" :port 9001))

yeah, I’m very much certain that this is a case of me doing something wrong

well, it tried - I got an IOException: No client connected to websocket

and I can’t seem to hit localhost:9001 with a browser

that's still progress

though it did give me a cljs.user> repl prompt

Did you add something like this to your core namespace?

`clojure (ns my.cljs.core

(:require [weasel.repl :as repl])) (repl/connect

"<ws://localhost:9001>") `

(ns my.cljs.core
  (:require [weasel.repl :as repl]))
(repl/connect "")

I think that's the part that connects to the websocket

Maybe you'll need to evaluate it

I didn't write that part, so I'm not 100% sure

I think maybe it was @cichli who wrote that part?

I'll update the cider-cljs-repl variable with the require

chris_johnson: Could you check something for me?

absolutely

Evaluate the following in Emacs (setq cider-cljs-repl "(do (require 'weasel.repl.websocket) (cemerick.piggieback/cljs-repl (weasel.repl.websocket/repl-env :ip \"127.0.0.1\" :port 9001)))")

Then quit the repl, and try that cider-jack-in-clojurescript command

I just want to know if this fixes the ClassNotFoundException

okay, nREPL server starting up

so that got further - I get both the CLJ and CLJS REPLs in separate frames

but the cljs REPL still throws the IOException

ok great

interestingly, it throws it again if I go find that (repl/connect “<ws://localhost:9001”>) line in core.cljs and C-c C-k

I’d think I need to have a browser loading the page somewhere for the Weasel REPL to work but I can’t figure out where I am either starting a server, or what port to try and hit

that’s, again, probably something I’m doing not quite right

thank you so much for taking the time to help me with this, by the way. I hope that I’m actually helping you test new stuff with my flailing about

I'm reading their Readme now

https://github.com/tomjakubowski/weasel#usage

Apparently, you should get a message like`

<< started Weasel server on ws://127.0.0.1:9001 >>

<< waiting for client to connect ...

"Weasel will block the REPL, waiting for a client to connect."

The lie detector determine that statement …was a lie.

though my dependency is 0.6.0, not 0.7.0

let me see what happens if I change that

!

<< waiting for client to connect...

Did it work?

:-)

okay, I’m much further along and have a better understanding of what I’m doing

Maybe see if you can get it to work manually, by following those steps on a regular clojure repl

If that works then we can figure out what Cider is doing wrong.

Cool

Those were some old messages

I'm on a crappy connection

Now. IIUC, that repl/connect snippet needs to be part of your clojurescript code, which I think should be compiled and opened in the browse.

oh, I see

But really, I'm working of what I'm reading :-)

I've never used weasel, so I could be wrong

Anyway It's pretty late here. So I gotta go. But let us know how this goes.

I was thinking I needed to be serving up a webpage

yeah, no problem - thanks again so much for your help

Yeah, that's what I thought too, but that cljs snippet needs to be run somehow. And I think you can't run it in the repl if you don't have a repl yet...

right

But these are very bold statements from a very tired person. :-) good night and good luck.

Just as a data point: I never got the weasel+piggieback combination to work. Not once. And not for the lack of trying. I finally gave up: for ClojureScript development I just use figwheel with its reloading, and println for debugging. Perhaps one day…

i echo that basic outcome

figwheel + println has been the only sustainable way i’ve been able to work

The cljs rhino repl worked as advertised for me out of the box. But all I did was start it and play around a bit.

@malabarba: do you perhaps know how i might configure a variant of an emacslisp global-set-key i have to use the C-u prefix variant to run an alternate function?

Weasel hasn't worked yet either

i’d like to run the first defun here when i C-u C-c r, and the second when i simply C-c r:

https://github.com/robert-stuttaford/.emacs.d/blob/master/keybinds.el#L48-L68

@robert-stuttaford yes, you need to define a new command

i tried simply giving it that keybind but it scolded me

Indeed, you can't bind C-u SOMETHING in Emacs

You have to write a command that checks forthe prefix, and then calls the appropriate function. And then bind this command to C-c r

found http://ergoemacs.org/emacs/elisp_universal_argument.html. i’m sure i’ll figure it out now, thank you

(defun run-the-test (first)
  (interactive "P")
  (call-interactively
   (if first #'the-first-command
     #'the-second-command)))

Something like this

That "P" inside interactive specifies that the first argument is the prefix argument.

what is the purpose of call-interactively, there?

awesome. works great. thank you, sir!

robert-stuttaford: It mimics the effect of you invoking those commands through a keybind

Like passing them some arguments, and setting the value of some interactive variables

But it's probably not necessary in your case

You can just use (the-first-command)

yep: https://github.com/robert-stuttaford/.emacs.d/blob/master/keybinds.el#L48-L59

🍻

well alright, I’ve gotten (js/alert “Hi, Mom!”) to put up an alert via the Weasel cljs repl

and while that’s pretty cool, I cannot seem to make changes to core.cljs and see them show up even by reloading the webpage so

I guess it’s off to figwheel + println for now. Thanks a ton @malabarba for all your assistance, also to @jrychter and @robert-stuttaford for sharing your experience and letting me know that it maybe wasn’t all user error I was running into.

@chris_johnson I'll certainly go into this again when I need to do cljs, then you can be sure we'll make it work our of the box

And I'll let people know here :-)