RailsOnLisp/rol-assets/extensions.lisp

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

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• extensions.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)
  
  ;;  Extensions package
  
  (defun intern-extension (name)
    (let ((sym (intern (string-upcase (if (char= #\. (char name 0))
                                          name
                                          (concatenate 'string "." name)))
                       :RoL-extensions)))
      (export sym :RoL-extensions)
      sym))
  
  (defun extension-p (thing)
    (and (symbolp thing)
         (eq #.(find-package :RoL-extensions)
             (symbol-package thing))))
  
  (deftype extension ()
    `(and symbol (satisfies extension-p)))
  

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