Find out the jar you're running in: Clojure

utils.clj

(ns engine.lib.utils
  (:require
    [clojure.string :as s]
    [clojure.java.io :as io]))

;;-----------------------------------------------------------------------------

(def ^:private path-sep
  (System/getProperty "path.separator"))

(def ^:private class-path
  (System/getProperty "java.class.path"))

(defn- find-this-class
  []
  (->> (str (namespace ::find-this-class) "__init")
       (namespace-munge)
       (symbol)
       (resolve)))

;;-----------------------------------------------------------------------------

(defn find-jar-file
  []
  (->> (.. (find-this-class)
           getProtectionDomain
           getCodeSource
           getLocation
           toURI)
       (io/file)
       (.getPath)))

(defn running-in-jar?
  []
  (try
    (.endsWith (s/lower-case (find-jar-file)) ".jar")
    (catch Throwable t false)))

(defn clojure-jar
  []
  (->> (-> class-path (s/split (re-pattern path-sep)))
       (filterv #(.contains % "/clojure-1."))
       (first)))