source: trunk/abcl/src/org/armedbear/lisp/require.lisp @ 12447

Last change on this file since 12447 was 12447, checked in by Mark Evenson, 11 years ago

REQUIRE now searches for ASDF systems.

If ASDF is loaded via (REQUIRE 'ASDF), all subsequent invocations of
REQUIRE will search for a loadable ASDF system definitions if the
default resolver mechanism fails.

SYS::*MODULE-PROVIDER-FUNCTIONS* now contains a customizable list of
module provider functions. Such a function takes a single argument of
the module that should be resolved and loaded. There is a builtin
resolver #'SYS::MODULE-PROVIDE-SYSTEM that implicitly called before
any functions in this variable.

  • Property svn:eol-style set to native
  • Property svn:keywords set to Id
File size: 2.8 KB
Line 
1;;; require.lisp
2;;;
3;;; Copyright (C) 2003-2005 Peter Graves
4;;; $Id: require.lisp 12447 2010-02-11 12:03:56Z 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(defvar *module-provider-functions* nil)
52
53(defun require (module-name &optional pathnames)
54  (unless (member (string module-name) *modules* :test #'string=)
55    (let ((saved-modules (copy-list *modules*)))
56      (cond (pathnames
57             (unless (listp pathnames) (setf pathnames (list pathnames)))
58             (dolist (x pathnames)
59               (load x)))
60            (t
61             (unless (some (lambda (p) (funcall p module-name))
62                           (append (list #'module-provide-system)
63                                 sys::*module-provider-functions*))
64               (error "Don't know how to ~S ~A." 'require module-name))))
65      (set-difference *modules* saved-modules))))
66
Note: See TracBrowser for help on using the repository browser.