Skip to content

Instantly share code, notes, and snippets.

@zentrope zentrope/fs.clj
Created Jan 14, 2015

What would you like to do?
file system utils
(ns lib.fs
;; File system utilities
[clojure.string :refer [lower-case join trim]]
[ :as io])
[ ZipInputStream]))
(defn path->
"Given a vector of strings, return an OS specific path."
[& parts]
(->> (map trim parts)
(defn exists?
"Does the given file exist?"
(.exists (io/as-file file)))
(defn delete-file!
"Delete the file if it exists."
(when (.exists file)
(io/delete-file file)))
(defn copy-file!
"Copy a file from one location to another."
[source target]
(io/copy (io/file source) (io/file target)))
(defn backup-file!
"Create a copy of a file with .bak, or .bak.1, .2, etc."
(let [file (io/file source)]
(loop [count 1
target (str (.getPath file) ".bak")]
(if (exists? target)
(recur (inc count) (str (.getPath file) ".bak." count))
(copy-file! source target)))))
(defn delete-directory-recursively!
"Delete the directory and everything it contains."
(doseq [file (reverse (file-seq (io/file base-dir)))]
(delete-file! file)))
(defn download!
[url target]
(let [con (-> url .openConnection)
buf (byte-array 2048)]
(with-open [in (io/input-stream (.getInputStream con))
out (io/output-stream (io/file target))]
(io/copy in out))
(.disconnect con)))
(defn unzip!
[file destination]
(let [buf (byte-array 10240)]
(with-open [in (ZipInputStream. (io/input-stream file))]
(loop [ze (.getNextEntry in)]
(when-not (nil? ze)
(let [target (io/file destination (.getName ze))]
(when (.isDirectory ze)
(.mkdirs target))
(when (not (.isDirectory ze))
(io/copy in target)))
(recur (.getNextEntry in)))))))
Sign up for free to join this conversation on GitHub. Already have an account? Sign in to comment
You can’t perform that action at this time.