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(ns lux.lib.loader
(:refer-clojure :exclude [load])
(:require (lux [base :as & :refer [|let |do return return* |case]]))
(:import (java.io InputStream
File
FileInputStream
ByteArrayInputStream
ByteArrayOutputStream)
java.util.jar.JarInputStream))
;; [Utils]
(let [init-capacity (* 100 1024)
buffer-size 1024]
(defn ^:private ^"[B" read-stream [^InputStream is]
(let [buffer (byte-array buffer-size)]
(with-open [os (new ByteArrayOutputStream init-capacity)]
(loop [bytes-read (.read is buffer 0 buffer-size)]
(when (not= -1 bytes-read)
(do (.write os buffer 0 bytes-read)
(recur (.read is buffer 0 buffer-size)))))
(.toByteArray os)))))
(defn ^:private unpackage [^File lib-file]
(let [is (->> lib-file
(new FileInputStream)
(new JarInputStream))]
(loop [lib-data {}
entry (.getNextJarEntry is)]
(if entry
(if (.endsWith (.getName entry) ".lux")
(recur (assoc lib-data (.getName entry) (new String (read-stream is)))
(.getNextJarEntry is))
(recur lib-data
(.getNextJarEntry is)))
lib-data))))
;; [Exports]
(defn load [dependencies]
(->> dependencies
&/->seq
(map #(->> ^String % (new File) unpackage))
(reduce merge {})))
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