Start Clojure Socket REPL server and write the port number into .repl-port

README.md

In your ~/.clojure/deps.edn, add an alias like this:

:socket-repl {:extra-deps {me.flowthing/shiv {:git/url "https://gist.github.com/eerohele/8611d1a98bd2d5e8ddda14d8394d720a"
                                              :sha "339ef83def69e62ac969a2fd797a9be1d3c1fe83"}}
              :exec-fn shiv/start-server
              :exec-args {:name "server"
                          :port 0
                          :accept clojure.core.server/repl
                          :server-daemon false}}

Then, on the command line, run:

$ clojure -X:socket-repl
Cloning: https://gist.github.com/eerohele/8611d1a98bd2d5e8ddda14d8394d720a
Checking out: https://gist.github.com/eerohele/8611d1a98bd2d5e8ddda14d8394d720a at 339ef83def69e62ac969a2fd797a9be1d3c1fe83
Socket REPL server listening on localhost:49889

deps.edn

{:paths ["."]}

shiv.clj

(ns shiv
  (:require
   [clojure.core.server :as server]
   [clojure.java.io :as io]))

(defn start-server
  [opts]
  (let [server (server/start-server opts)
        port (.getLocalPort server)
        host (-> server .getInetAddress .getCanonicalHostName)
        port-file (io/file ".repl-port")]
    (.deleteOnExit port-file)
    (spit port-file port)
    (printf "Socket server listening on %s:%s\n" host port)))