;;;; Programmer: Kevin M. Rosenberg
;;;; Date Started: Apr 2000
;;;;
-;;;; $Id: io.lisp,v 1.15 2003/07/31 17:03:37 kevin Exp $
+;;;; $Id$
;;;;
-;;;; This file, part of KMRCL, is Copyright (c) 2002 by Kevin M. Rosenberg
+;;;; This file, part of KMRCL, is Copyright (c) 2002-2003 by Kevin M. Rosenberg
;;;;
;;;; KMRCL users are granted the rights to distribute and use this software
;;;; as governed by the terms of the Lisp Lesser GNU Public License
(when (probe-file #p"/dev/null")
(open-device-stream #p"/dev/null" :output))
)
+
+
+(defun directory-tree (filename)
+ "Returns a tree of pathnames for sub-directories of a directory"
+ (let* ((root (canonicalize-directory-name filename))
+ (subdirs (loop for path in (directory
+ (make-pathname :name :wild
+ :type :wild
+ :defaults root))
+ when (probe-directory path)
+ collect (canonicalize-directory-name path))))
+ (when (find nil subdirs)
+ (error "~A" subdirs))
+ (when (null root)
+ (error "~A" root))
+ (if subdirs
+ (cons root (mapcar #'directory-tree subdirs))
+ (if (probe-directory root)
+ (list root)
+ (error "root not directory ~A" root)))))
+
+