source: trunk/abcl/src/org/armedbear/lisp/require.lisp @ 12676

Last change on this file since 12676 was 12676, checked in by Mark Evenson, 11 years ago

Muffle warning from Ant 1.8.1 about includeantruntime not being set.

  • Property svn:eol-style set to native
  • Property svn:keywords set to Id
File size: 3.5 KB
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1;;; require.lisp
2;;;
3;;; Copyright (C) 2003-2005 Peter Graves
4;;; $Id: require.lisp 12676 2010-05-13 16:44:05Z mevenson $
5;;;
6;;; This program is free software; you can redistribute it and/or
7;;; modify it under the terms of the GNU General Public License
8;;; as published by the Free Software Foundation; either version 2
9;;; of the License, or (at your option) any later version.
10;;;
11;;; This program is distributed in the hope that it will be useful,
12;;; but WITHOUT ANY WARRANTY; without even the implied warranty of
13;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
14;;; GNU General Public License for more details.
15;;;
16;;; You should have received a copy of the GNU General Public License
17;;; along with this program; if not, write to the Free Software
18;;; Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
19;;;
20;;; As a special exception, the copyright holders of this library give you
21;;; permission to link this library with independent modules to produce an
22;;; executable, regardless of the license terms of these independent
23;;; modules, and to copy and distribute the resulting executable under
24;;; terms of your choice, provided that you also meet, for each linked
25;;; independent module, the terms and conditions of the license of that
26;;; module.  An independent module is a module which is not derived from
27;;; or based on this library.  If you modify this library, you may extend
28;;; this exception to your version of the library, but you are not
29;;; obligated to do so.  If you do not wish to do so, delete this
30;;; exception statement from your version.
31
32(in-package #:system)
33
34;;; PROVIDE, REQUIRE (from SBCL)
35(defun provide (module-name)
36  (pushnew (string module-name) *modules* :test #'string=)
37  t)
38
39(defun module-provide-system (module) 
40  (let ((*readtable* (copy-readtable nil)))
41       (handler-case 
42           (load-system-file (string-downcase (string module)))
43         (t (e) 
44           (unless (and (typep e 'error)
45                        (search "Failed to find loadable system file"
46                                (format nil "~A" e)))
47             (format *error-output* "Failed to require  ~A because '~A'~%" 
48                     module e))
49           nil))))
50
51         ;;   (progn
52         ;;     (format t "BEFORE~%")
53         ;;     (load-system-file (string-downcase (string module)))
54         ;;     (format t "AFTER~%"))
55         ;; ((error (c)
56         ;;   (progn
57         ;;     (format t "MATCHED~%")
58         ;;     ;; XXX It would be much better to detect an error
59         ;;     ;; type rather than searching for a string, but
60
61         ;;     ;; that's tricky as LOAD-SYSTEM-FILE is such an
62         ;;     ;; early primitive.
63         ;;     (when (search "Failed to find loadable system file"
64         ;;                   (format nil "~A" c))
65         ;;       (return-from module-provide-system (values nil c)))))))))
66   
67(defvar *module-provider-functions* nil)
68
69(defun require (module-name &optional pathnames)
70  (unless (member (string module-name) *modules* :test #'string=)
71    (let ((saved-modules (copy-list *modules*)))
72      (cond (pathnames
73             (unless (listp pathnames) (setf pathnames (list pathnames)))
74             (dolist (x pathnames)
75               (load x)))
76            (t
77             (unless (some (lambda (p) (funcall p module-name))
78                           (append (list #'module-provide-system)
79                                 sys::*module-provider-functions*))
80               (warn "Failed to require ~A." module-name))))
81      (set-difference *modules* saved-modules))))
82
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