Refresh logback.xml from a Clojure REPL

README.md

deps.edn

{:deps {gist-uwo/logbacku {:git/url "https://gist.github.com/uwo/e98b012c0d9b4bfb4d3464c2ac1e5efd"
                          :sha "6febe8063e7189f39c1bdeb11db2e4ade519bcb8"}}}

deps.edn

{:paths ["."]
 :deps {ch.qos.logback/logback-classic {:mvn/version "1.2.3"}}}

logbacku.clj

(ns logbacku
  (:require [clojure.java.io :as io])
  (:import ch.qos.logback.classic.joran.JoranConfigurator
           ch.qos.logback.classic.LoggerContext
           org.slf4j.LoggerFactory))

(defn reload-logback
  "Load the given logback configuration file or reload the previously
   loaded one if none is provided."
  ([]
   (reload-logback (java.lang.System/getProperty "logback.configurationFile")))
  ([filepath]
   (let [context ^LoggerContext (LoggerFactory/getILoggerFactory)
         configurator (JoranConfigurator.)
         config (io/file filepath)]
     (assert config)
     (.reset context)
     (.setContext configurator context)
     (.doConfigure configurator config)
     {::reloaded-path filepath})))