Hi all, my current project has shadow-cljs for frontend and lein for the backend. This creates problems in CIDER, where I cannot be connected to both instances. I would like to use cider-connect-clj&cljs, and it seems I need both to be the same build tool (lein or shadow-cljs). How would I accomplish this? I currently have a project.clj and shadow-cljs.edn. Do I need to change shadow-cljs.edn to use lein, or somehow convert project.clj into shadow-cljs?

I'm pretty sure cider can connect to two instances, so you can leave everything as is. you can move dependencies from shadow-cljs.edn to project.clj to launch via lein https://shadow-cljs.github.io/docs/UsersGuide.html#Leiningen

It seems cider gets confused about the two instances (two different ports). I moved the dependencies like in the manual, but I am getting "Clojurescript is not available" when running cider-connect-sibling-cljs. Here is shadow-cljs.edn:

{:lein {:profile "+cljs"}
 :nrepl {:port 8777}

 :jvm-opts ["-Xmx1G"]

 :dev-http
 {8280 "resources/public"
  8290 "target/browser-test"}

 :builds
 {:app
  {:target     :browser
   :output-dir "resources/public/js/compiled"
   :asset-path "/js/compiled"
   :modules
   {:app {:init-fn re-frame-proj.core/init}}
   :devtools
   {:preloads [
               ;; devtools.preload
               ;; re-frisk.preload
               ]}
   :dev
   {:compiler-options
    {:closure-defines
     { }}}}}}

(defproject re-frame-proj "0.1.0-SNAPSHOT"
  :description "Backend server for Slix using Clojure."
  :url ""
  :license {:name "EPL-2.0 OR GPL-2.0-or-later WITH Classpath-exception-2.0"
            :url ""}
  :dependencies [[org.clojure/clojure "1.11.1"]
                 [ring/ring-core "1.8.2"]
                 [ring/ring-jetty-adapter "1.8.2"]
                 [cider/cider-nrepl "0.28.4"]
                 [org.clojure/tools.namespace "1.3.0"] ; used for lispy
                 ;; [org.clojure/java.jdbc "0.7.12"]
                 ;; [org.xerial/sqlite-jdbc "3.40.1.0"]
                 [compojure "1.7.0"]
                 ;; [com.github.seancorfield/honeysql "2.4.972"]
                 [ring-cors "0.1.13"]
                 [ring/ring-json "0.5.1"]
                 [org.clojure/data.json "2.4.0"]
                 [io.aviso/pretty "1.3"]
                 ;; for memory measurement
                 [com.clojure-goes-fast/clj-memory-meter "0.2.1"]
                 ;; [datascript "1.4.0"]
                 ;; [io.replikativ/datahike "0.6.1531"]
                 [dev.weavejester/medley "1.6.0"]
                 [clj-time "0.15.2"]
                 [datalevin "0.8.5"]
                 ;; [org.clojars.quoll/asami "2.2.4"]
                 ]
  :main re-frame-proj.core
  ;; for memory measurement
  :jvm-opts ["-Djdk.attach.allowAttachSelf" "-Xmx8G"]
  :repl-options {:init-ns re-frame-proj.core}
  :profiles
  {:cljs
   {:source-paths ["src"]
    :dependencies
    [[thheller/shadow-cljs "2.23.3"]
     [reagent "1.1.1"]
     [re-frame "1.3.0"]

     [binaryage/devtools "1.0.7"]
     [re-frisk "1.6.0"]
     [cider/cider-nrepl "0.28.4"]

     [cljs-http "0.1.46"]
     [cljs-ajax "0.8.4"]
     [day8.re-frame/http-fx "0.2.4"]
     [clj-commons/secretary "1.2.4"]
     [com.cemerick/url "0.1.1"]
     [venantius/accountant "0.2.5"]
     [com.rpl/specter "1.1.4"]
     [philoskim/debux "0.8.3"]
     [expound "0.9.0"]
     [re-com "2.13.2"]]}}
  )

sorry, can't answer cider questions. I don't have the slightest clue how it works. I'd assume the cider docs cover everything.

I’ve used CIDER with Leiningen and Shadow CLJS before, but too much information is omitted in the project.clj for me to tell what is possible going wrong

e.g. where is the nrepl middleware? are you using the proper version of cljs and google-closure for your version of shadow-cljs?

@hifumi123 I have edited the file so that it's in full. It seems I am missing some dependencies on lein side that is necessary for cljs?

if thats using the lein nrepl server (not the shadow-cljs one) you need to add :nrepl-middleware https://shadow-cljs.github.io/docs/UsersGuide.html#_embedded_nrepl_server

IIRC you also need to provide your own CLJS dependency and ensure it is compatible with shadow-cljs version youre using

not necessarily. shadow-cljs also brings it in. only need to be explicit if you have conflicts, ie. another dependency bringing in an older incompatible version

Ah, I see. For good measure I always used :managed-dependencies so that org.clojure/clojurescript was pinned to the exact version shadow-cljs would depend on.

a good way to avoid conflicts for sure

I got it to work. Thanks for the help! I haven't delved into leiningen before, so I had some trouble with profiles.

Is there shadow-cljs.edn config equivalent to that shown https://clojure.org/guides/deps_and_cli#socket_repl? I have shadow-cljs running in server mode on a remote host. I tried connecting with netcat but that seems to time out (though I guess I'm missing configuration I probably need).