RailsOnLisp/rol-assets/gzip.lisp

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• Hash : cf03e3cc
  Author : Thomas de Grivel
  Date : 2017-03-04T19:15:41
  

  Replace files on asset precompile.
  

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• gzip.lisp

• ;;
  ;;  RoL-assets  -  Asset pipeline
  ;;
  ;;  Copyright 2012-2015 Thomas de Grivel <thomas@lowh.net>
  ;;
  ;;  Permission to use, copy, modify, and distribute this software for any
  ;;  purpose with or without fee is hereby granted, provided that the above
  ;;  copyright notice and this permission notice appear in all copies.
  ;;
  ;;  THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
  ;;  WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
  ;;  MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
  ;;  ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
  ;;  WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
  ;;  ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
  ;;  OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  ;;
  
  (in-package :RoL-assets)
  
  (defvar *gzipped-extensions* '(.css .js .svg))
  
  (defun gzip (input &optional (output (str input ".gz")))
    (with-temporary-file (tmp :element-type '(unsigned-byte 8)
                              :prefix output)
      (external-program:run "gzip" (list "-c")
                            :input input
                            :output tmp)
      (when (probe-file output)
        (sb-posix:unlink output))
      (sb-posix:link tmp output)
      output))
  
  (defgeneric gzip-asset (asset path))
  
  (defmethod gzip-asset ((asset asset) path)
    (when (find (asset-ext asset) *gzipped-extensions* :test #'eq)
      (gzip path)))
  

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