tee-stdout.clj

(def ^:dynamic *orig-out* nil)

; see http://docs.oracle.com/javase/7/docs/api/java/io/Writer.html
(def out-proxy
  (proxy [StringWriter] []
    (write
      ([x]
       (.write *orig-out* x)
       (proxy-super write x))
      ([x off len]
       (.write *orig-out* x off len)
       (proxy-super write x off len)))
    (append
      ([x]
       (.append *orig-out* x)
       (proxy-super append x)
       this)
      ([x start end]
       (.append *orig-out* x start end)
       (proxy-super append x start end)
       this))
    (close
      ([]
       (.close *orig-out*)
       (proxy-super close)))
    (flush
      ([]
       (.flush *orig-out*)
       (proxy-super flush)))
    ))
  
  ....
       (binding [repl-driver/*orig-out* *out*
               *out* repl-driver/out-proxy]
       (start-cljs-repl protocol figwheel-repl-env repl-opts)))))