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;;
;;  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)

;;  Misc

(defun empty-p (string)
  (or (null string)
      (not (cl-ppcre:scan "\\S" string))))

(eval-when (:compile-toplevel :load-toplevel)
  (let ((cache-nil (gensym "CACHE-NIL-")))

    (defmacro cache-1 ((test key) &body body)
      "Cache one value of BODY. TEST identifies KEY is cached."
      (let ((cache (gensym "CACHE-")))
        `(let ((,cache (load-time-value (cons ',cache-nil nil))))
           (if (,test (car ,cache) ,key)
               (cdr ,cache)
               (setf (car ,cache) ,key
                     (cdr ,cache) (progn ,@body))))))))

;;  Log messages

(defvar *msg-indent* 0)

(defmacro with-msg-indent ((level) &body body)
  `(let ((*msg-indent* (+ ,level *msg-indent*)))
     ,@body))

(defun msg (fmt &rest args)
  (let ((*standard-output* *error-output*))
    (fresh-line)
    (dotimes (i *msg-indent*)
      (write-char #\Space))
    (apply #'format t fmt args)
    (fresh-line)
    (force-output)))

(defun debug-msg (fmt &rest args)
  (when (debug-p :assets)
    (apply #'msg fmt args)))
RailsOnLisp/rol-assets/lib.lisp

Commit

lib.lisp
