35 lines
1.1 KiB
Clojure
35 lines
1.1 KiB
Clojure
(ns cryogen-core.watcher
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(:require [clojure.java.io :refer [file]]
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[cryogen-core.io :refer [ignore]]
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[pandect.core :refer [md5]]
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[clojure.set :as set]))
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(defn get-assets [path ignored-files]
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(->> path
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file
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file-seq
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(filter #(not (.isDirectory ^java.io.File %)))
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(filter (ignore ignored-files))))
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(defn checksums [path ignored-files]
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(let [files (get-assets path ignored-files)]
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(zipmap (map md5 files) files)))
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(defn find-changes [old-sums new-sums]
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(let [old-sum-set (-> old-sums keys set)
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new-sum-set (-> new-sums keys set)]
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(when-some [changes (set/difference new-sum-set old-sum-set)]
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(vals (select-keys new-sums changes)))))
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(defn watch-assets [root ignored-files action]
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(loop [sums (checksums root ignored-files)]
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(Thread/sleep 300)
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(let [new-sums (checksums root ignored-files)]
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(when (find-changes sums new-sums)
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(action))
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(recur new-sums))))
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(defn start-watcher! [root ignored-files action]
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(doto (Thread. #(watch-assets root ignored-files action))
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(.setDaemon true)
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(.start)))
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