Instructions

1. Add nrepl server dep to deps.edn :dev alias extra deps

org.clojure/tools.nrepl {:mvn/version "0.2.12"}

2. create dev/user.clj containing the following:

(ns user
  (:require [clojure.tools.nrepl.server :as nrepl]))

(defonce nrepl-server (nrepl/start-server))
(spit "./.nrepl-port" (:port nrepl-server))

3. add dev to extra-paths under your dev alias

Example deps.edn (taken from ions starter demo project)

{:paths ["src" "resources"]
 :deps {com.datomic/ion {:mvn/version "0.9.26"}
        org.clojure/data.json {:mvn/version "0.2.6"}
        org.clojure/clojure {:mvn/version "1.9.0"}}
 :mvn/repos {"datomic-cloud" {:url "s3://datomic-releases-1fc2183a/maven/releases"}}
 :aliases
 {:dev {:extra-paths ["dev"]
        :extra-deps {org.clojure/tools.nrepl {:mvn/version "0.2.12"}
                     com.datomic/client-cloud {:mvn/version "0.8.63"}
                     com.datomic/ion-dev {:mvn/version "0.9.176"}}}}}

Run with: clj -A:dev to add the dev deps and paths.