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Automatically rebuild if *any* file changes #7

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27 changes: 17 additions & 10 deletions src/leiningen/lein_haml_sass/render_engine.clj
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Original file line number Diff line number Diff line change
Expand Up @@ -63,22 +63,29 @@
;; ruby gem will print an error message
(println " -> Compilation failed\n\n" ))))

(defn rebuild-file?
"Given a file descriptor, return true if that file needs to be rebuilt"
[src-type file-descriptor]
(let [dest-file (io/file (:dest file-descriptor))
src-file (io/file (src-type file-descriptor))]
(or (not (.exists dest-file))
(> (.lastModified src-file) (.lastModified dest-file)))))

(defn render-all!
([options watch?] (render-all! options watch? false))

([{:keys [src-type auto-compile-delay] :as options} watch? force?]
(ensure-engine-started! options)
(loop []
(doseq [file-descriptor (files-from options)]
(let [dest-file (io/file (:dest file-descriptor))
src-file (io/file (src-type file-descriptor))]
(when (or force?
(not (.exists dest-file))
(> (.lastModified src-file) (.lastModified dest-file)))
(println (str " [" (name src-type) "] - " (java.util.Date.) " - " src-file " -> " dest-file))
(io/make-parents dest-file)
(spit dest-file (render src-type (slurp (src-type file-descriptor)))))))

(let [descriptors (files-from options)
building-any? (some #(rebuild-file? src-type %) descriptors)]
(doseq [file-descriptor descriptors]
(when (or force? building-any?)
(let [dest-file (io/file (:dest file-descriptor))
src-file (io/file (src-type file-descriptor))]
(println (str " [" (name src-type) "] - " (java.util.Date.) " - " src-file " -> " dest-file))
(io/make-parents dest-file)
(spit dest-file (render src-type (slurp (src-type file-descriptor))))))))
(when watch?
(Thread/sleep auto-compile-delay)
(recur)))))
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