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;;
;; LowH Triangle Assets - Asset pipeline
;;
;; Copyright 2012 Thomas de Grivel <billitch@gmail.com>
;;
;; 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)
;; Finding assets
;; FIXME: This could be improved by listing all files in assets
;; FIXME: directories to work the paths in memory.
(defun find-in-assets (type dir name ext assets)
(find-if (lambda (asset)
(declare (type asset asset))
(and (typep asset type)
(string= name (asset-name asset))
(or (not (string= dir (asset-source-dir asset)))
(string= ext (asset-source-ext asset)))))
assets))
#+nil
(fmakunbound 'find-assets)
(defgeneric find-assets (type dir name ext assets))
;; Resolve name, possibly wild
(defmethod find-assets ((type class)
(dir string)
(name string)
(ext symbol)
assets)
(let ((absolute-dir (truename dir))
(assets assets))
(dolist (path (reverse (directory (str dir name ext))))
(unless (char= #\. (char (pathname-name path) 0))
(let* ((name.ext (enough-namestring (truename path) absolute-dir))
(name (if ext
(subseq name.ext 0 (- (length name.ext)
(length (string ext))))
name.ext)))
(unless (find-in-assets type dir name ext assets)
(push (make-instance type
:name name
:source-dir dir
:source-ext ext)
assets)))))
assets))
;; Loop through extensions
(defmethod find-assets ((type class)
(dir string)
(name string)
(extensions cons)
assets)
(reduce (lambda (assets ext)
(declare (type symbol ext))
(find-assets type dir name ext assets))
extensions
:initial-value assets))
(defmethod find-assets ((type class)
(dir string)
(name string)
(ext null)
assets)
(when (setq ext (asset-class-extensions type))
(find-assets type dir name ext assets)))
;; Loop through dirs
(defmethod find-assets ((type class)
(directories cons)
(name string)
ext
assets)
(reduce (lambda (assets dir)
(declare (type string dir))
(find-assets type dir name ext assets))
directories
:initial-value assets))
(defmethod find-assets (type (dir null) name ext assets)
(find-assets type (assets-dirs) name ext assets))
;; Resolve class
(defmethod find-assets ((type symbol) dir name ext assets)
(let ((class (if (keywordp type)
(find-class (find-symbol (str type "-ASSET")))
(find-class type))))
(unless class
(error "Unknown asset type : ~S" type))
(find-assets (the class class) dir name ext assets)))
;; Asset spec
(defmacro with-asset-spec (spec (name ext) &body body)
`(let (,name ,ext)
(cl-ppcre:register-groups-bind (n e)
("^\\s*(.*?)(?:\\.([^./]+))?\\s*$" ,spec)
(setf ,name n ,ext (when e (intern-extension e))))
(let ((,name ,name) (,ext ,ext))
,@body)))
(defun find-assets-from-spec (spec &optional class assets)
(labels ((assets-matching (class name ext)
(if class
(let ((new (find-assets class nil name
(asset-class-extensions class)
assets)))
(unless (eq new assets)
new))
(when ext
(some (lambda (class) (assets-matching class name ext))
(extension-asset-classes ext))))))
(or (assets-matching class spec nil)
(with-asset-spec spec (name ext)
(when (if class
(find ext (asset-class-extensions class))
ext)
(assets-matching class name ext)))
assets)))
(defun find-assets-from-specs (specs &optional class assets)
(reduce (lambda (assets spec)
(find-assets-from-spec spec class assets))
specs
:initial-value assets))
;; Asset cache
(defvar *asset-cache* (make-hash-table :test 'equal))
(defun clear-asset-cache ()
(clrhash *asset-cache*))
(defmacro asset-cache-get (key)
`(gethash ,key *asset-cache*))
(defun find-asset (spec &optional class)
(or #1=(asset-cache-get `(find-asset ,spec ,class))
(setf #1# (let ((ext (when-let ((type (pathname-type spec)))
(intern-extension type)))
(assets (find-assets-from-spec spec class)))
(or (find ext assets :key #'asset-source-ext :test #'eq)
(first assets))))))
;; Now that we can find an asset from a string spec we can also
;; add some sugar coating to asset methods.
(defmethod asset-ext ((spec string))
(asset-ext (find-asset spec)))
(defmethod asset-url ((spec string))
(asset-url (find-asset spec)))
(defmethod asset-path ((spec string))
(asset-path (find-asset spec)))
(defmethod asset-write-date ((spec string))
(asset-write-date (find-asset spec)))
(defmethod asset-source-path ((spec string))
(asset-source-path (find-asset spec)))
(defmethod asset-sources ((spec string))
(asset-sources (find-asset spec)))
(defmethod asset-include (output
context
(spec string)
&rest args &key &allow-other-keys)
(apply #'asset-include output context (find-asset spec) args))
(defmethod compile-asset ((spec string) output)
(compile-asset (find-asset spec) output))