RailsOnLisp/rol-assets/js.lisp

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• Hash : 160d346b
  Author : Thomas de Grivel
  Date : 2017-06-21T11:12:40
  

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• js.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)
  
  ;;    JS
  
  (defclass js-asset (preprocessed-asset) ())
  
  (defmethod asset-ext ((asset js-asset))
    '.js)
  
  (defmethod asset-class-extensions ((class (eql 'js-asset)))
    '(.js))
  
  (defmethod asset-include ((output stream)
                            (context (eql :html))
                            (asset js-asset)
                            &key &allow-other-keys)
    (write-string "<script src=\"" output)
    (write-string (quote-html (asset-url asset)) output)
    (write-string "\" type=\"text/javascript\"></script>
  " output)
    (values))
  
  ;;  Compile
  
  (defun uglifyjs (in out)
    (write-string
     (uglify-js:ast-gen-code
      (uglify-js:ast-mangle
       (uglify-js:ast-squeeze
        (parse-js:parse-js in)))
      :beautify nil)
     out))
  
  (defun jsmin (in out)
    (let ((err (make-string-output-stream)))
      (unwind-protect
           (sb-ext:run-program "jsmin" '()
                               :input in
                               :output out
                               :error err
                               :search t)
        (close err))))
  
  (defmethod process-asset ((asset js-asset)
                            (output stream))
    (with-input-from-file/utf-8 (js (asset-source-path asset))
      (copy-stream js output))
    (force-output output)
    (values))
  
  (defmethod compile-asset ((asset js-asset) (output stream))
    (with-temporary-file (tmp)
      (call-next-method asset tmp)
      (force-output tmp)
      (file-position tmp 0)
      (uglifyjs tmp output))
    (values))
  

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