NullPointerException when running figwheel in a cursive clojure REPL

[aeberts]

I was attempting to get a figwheel repl running in a cursive clojure repl.

MacOS 10.10.2 Intellij 14.1 Cursive version 0.1.54) Java 1.8

my project.clj:

(defproject fig-temp "0.1.0-SNAPSHOT"
  :description "FIXME: write this!"
  :url "http://example.com/FIXME"
  :license {:name "Eclipse Public License"
            :url "http://www.eclipse.org/legal/epl-v10.html"}

  :dependencies [[org.clojure/clojure "1.7.0-beta2"]
                 [org.clojure/clojurescript "0.0-3211" :scope "provided"]
                 [figwheel "0.2.9"]
                 [figwheel-sidecar "0.2.9"]
                 [org.clojure/core.async "0.1.346.0-17112a-alpha"]
                 [cljsjs/react "0.13.1-0"]
                 [reagent "0.5.0"]
                 [reagent-forms "0.5.0"]
                 [reagent-utils "0.1.4"]
                 [re-com "0.5.3"]
                 [secretary "1.2.3"]]

  :plugins [[lein-cljsbuild "1.0.5"]
            [lein-figwheel "0.2.9"]]

  :source-paths ["src"]

  :clean-targets ^{:protect false} ["resources/public/js/compiled"]

  :cljsbuild {
    :builds [{:id "dev"
              :source-paths ["src" "dev_src"]
              :compiler {:output-to "resources/public/js/compiled/fig_temp.js"
                         :output-dir "resources/public/js/compiled/out"
                         :optimizations :none
                         :main fig-temp.dev
                         :asset-path "js/compiled/out"
                         :source-map true
                         :source-map-timestamp true
                         :cache-analysis true }}
             {:id "min"
              :source-paths ["src"]
              :compiler {:output-to "resources/public/js/compiled/fig_temp.js"
                         :main fig-temp.core                         
                         :optimizations :advanced
                         :pretty-print false}}]}

  :figwheel {
             :http-server-root "public" ;; default and assumes "resources" 
             :server-port 3449 ;; default
             :css-dirs ["resources/public/css"] ;; watch and update CSS

             ;; Start an nREPL server into the running figwheel process
             :nrepl-port 7888

             ;; Server Ring Handler (optional)
             ;; if you want to embed a ring handler into the figwheel http-kit
             ;; server, this is simple ring servers, if this
             ;; doesn't work for you just run your own server :)
             ;; :ring-handler hello_world.server/handler

             ;; To be able to open files in your editor from the heads up display
             ;; you will need to put a script on your path.
             ;; that script will have to take a file path and a line number
             ;; ie. in  ~/bin/myfile-opener
             ;; #! /bin/sh
             ;; emacsclient -n +$2 $1
             ;;
             ;; :open-file-command "myfile-opener"

             ;; if you want to disable the REPL
             :repl false

             ;; to configure a different figwheel logfile path
             ;; :server-logfile "tmp/logs/figwheel-logfile.log" 
             })

Reproduction Steps:

• Started figwheel in the terminal with lein figwheel
• Create repl config in Cursive. Using Clojure REPL -> Local and then using Run nREPL with Leiningen
• Browser connect to localhost:3449 (console shows that browser connects to figwheel)
• Start the clojure repl from the Cursive toolbar
• Type the following into the repl window:

Connecting to local nREPL server...
Loading /Users/zand/Library/Application Support/IntelliJIdea14/clojure-plugin/lib/cursive.jar!/cursive/repl/runtime.clj... done
Clojure 1.7.0-beta2
nREPL server started on port 63923 on host 127.0.0.1 - nrepl://127.0.0.1:63923
(use 'figwheel-sidecar.repl-api)
=> nil
(cljs-repl)
NullPointerException   clojure.core/deref-future (core.clj:2184)

[aeberts]

Oops. I guess I was looking at the wrong instructions.

I tried the same thing using a Remote repl on port 7888 and the figwheel repl seems to be working fine :-)

[bhauman]

Glad you found it. This is not necessary, but if you have a moment it would be super helpful if there was a figwheel Wiki page with the correct instructions for how to get the REPL working for Cursive. I understand if you aren't able to do it. But this info would be really helpful for people and as of yet I haven't used Cursive.

[aeberts]

Done!

Please don't hesitate to add, modify, destroy, etc.

https://github.com/bhauman/lein-figwheel/wiki/Running-figwheel-in-a-Cursive-Clojure-REPL

On Thu, Apr 30, 2015 at 10:07 PM, Bruce Hauman notifications@github.com wrote:

Glad you found it. This is not necessary, but if you have a moment it would be super helpful if there was a figwheel Wiki page with the correct instructions for how to get the REPL working for Cursive. I understand if you aren't able to do it. But this info would be really helpful for people and as of yet I haven't used Cursive.

— Reply to this email directly or view it on GitHub https://github.com/bhauman/lein-figwheel/issues/140#issuecomment-98022491 .

Alexander Eberts (514) 944 8562

[bhauman]

Absolutely awesome!! Thank you!