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Using Calva with REBL

To use this extension with REBL do the following.

Clojure CLI

  1. Add your aliases to your deps.edn file. Use the deps.edn file in the ~/.clojure directory to enable alias reuse across multiple projects.
  • Add the REBL and nREBL aliases to your deps.edn file. Below is the configuration for REBL on openjdk 12
;; REBL Base
{:extra-deps {org.clojure/core.async {:mvn/version "0.4.490"}
                ;; deps for file datafication (0.9.149 or later)
                org.clojure/data.csv {:mvn/version "0.1.4"}
                org.clojure/data.json {:mvn/version "0.2.3"}
                org.yaml/snakeyaml {:mvn/version "1.23"}
                ;; adjust to match your install location
                {:local/root "/Users/ozimos/REBL/latest/REBL.jar"}}}
;; REBL 12
{:extra-deps {org.openjfx/javafx-fxml     {:mvn/version "12.0.1"}
                org.openjfx/javafx-controls {:mvn/version "12.0.1"}
                org.openjfx/javafx-graphics {:mvn/version "12.0.1"}
                org.openjfx/javafx-media    {:mvn/version "12.0.1"}
                org.openjfx/javafx-swing    {:mvn/version "12.0.1"}
                org.openjfx/javafx-base     {:mvn/version "12.0.1"}
                org.openjfx/javafx-web      {:mvn/version "12.0.1"}}}

;; nREBL
:nrebl {:extra-deps {rickmoynihan/nrebl.middleware {:mvn/version "0.2.0"}}
            :main-opts ["-e" "((requiring-resolve,'cognitect.rebl/ui))" "-m" "nrepl.cmdline" "--middleware" "[nrebl.middleware/wrap-nrebl]" "-I"]}      

Check out the REBL github page for more info

  1. Create a Calva custom connect sequence for your VSCode editor
    "calva.replConnectSequences": [
            "name": "Rebl Connect",
            "projectType": "Clojure CLI",
            "menuSelections": {
                "cljAliases": [


  1. Add rebl profiles to your user-wide profiles so that they will be available for all your projects. A sample user profile (located at ~/.lein/profiles.clj on mac)
{:user {:plugins [[lein-ancient "0.6.15"]]}
 ;; REBL Base
 :rebl {:resource-paths ["/Users/ozimos/REBL/latest/REBL.jar"]
        :dependencies [[org.clojure/core.async "0.4.490"]
                       [org.clojure/data.csv "0.1.4"]
                       [org.clojure/data.json "0.2.3"]
                       [cljfmt "0.6.4"]
                       [org.yaml/snakeyaml "1.23"]]}
  ;; REBL 12 for JDK 12.0.1. Swap out for your JDK vaersion
 :rebl-12 {:dependencies [[org.openjfx/javafx-fxml  "12.0.1"]
                          [org.openjfx/javafx-controls "12.0.1"]
                          [org.openjfx/javafx-graphics "12.0.1"]
                          [org.openjfx/javafx-media "12.0.1"]
                          [org.openjfx/javafx-swing "12.0.1"]
                          [org.openjfx/javafx-base  "12.0.1"]
                          [org.openjfx/javafx-web "12.0.1"]]}
 ;; NREBL                         
 :nrebl {:repl-options {:nrepl-middleware [nrebl.middleware/wrap-nrebl]}
        :dependencies [[rickmoynihan/nrebl.middleware "0.3.1"]]}}

More info here

  1. Create a Calva custom connect sequence for your VSCode editor
    "calva.replConnectSequences": [
            "name": "Lein REBL",
            "projectType": "Leiningen",
            "menuSelections": {
                "leinProfiles": ["rebl", "rebl-12", ":nrebl"]
            "afterCLJReplJackInCode": "((requiring-resolve 'cognitect.rebl/ui))"

shadow-cljs (TBD)

TBD. If you know how to do it, please update this page.

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