lessc watcher in Clojure

lessc.clj

(ns lessc
  (:require [pro.juxt.dirwatch :refer (watch-dir)]
            [clojure.java.io :refer (file)]
            [spyscope.core]
            [clojure.core.async :as a]))

(defn run-less []
  (println "Running LESS")
  (doto
        (ProcessBuilder. ["lessc" "resources/bootstrap/assets/mybootstrap.less" "resources/public/s.css"])
      (.redirectOutput java.lang.ProcessBuilder$Redirect/INHERIT)
      (-> .start .waitFor))
  (println "Finishing LESS"))

(defn process-watch [c]
  (println "Starting")
  (run-less)
  (loop []
    (a/<!! c)
    (println "Files Changed")
    (run-less)
    (recur)))

(defn watch []
  (let [c (a/chan (a/dropping-buffer 1))
        f (file "/home/julian/handel/resources/bootstrap/assets/")]
    (watch-dir #(a/>!! c %) f)
    (future (process-watch c))))

Thanks! Otherwise I never would have found out there should be $ in between ProcessBuilder.Redirect.