Launch a plain clojure repl according to project.clj without leiningen (most of the time)

kein.sh

#!/bin/bash
# launch a clojure plain repl but with options and classpath matching project.clj
# Except when project.clj changes (and on first launch), lein is not called.

CODE='
(let [p  (leiningen.core.project/read)
      args (@(var leiningen.core.eval/get-jvm-args) p)
      cp (with-out-str (leiningen.classpath/classpath p))]
  (print "ARGS=\"")
  (apply print args)
  (println "\"")
  (print "CP=\"")
  (print cp)
  (println "\""))
'

if [ ! -f "project.clj" ]; then
  echo "No project.clj"
  exit 1
fi

if [ ! -f ".kein" ] || [ "project.clj" -nt ".kein" ] || [ $0 -nt ".kein" ]; then
  lein update-in : assoc :eval-in :leiningen -- run -m clojure.main -e "$CODE" > .kein
fi

source .kein

java $ARGS -cp $CP clojure.main "$@"