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diff --git a/src/guile/skribilo/parameters.scm b/src/guile/skribilo/parameters.scm
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+;;; parameters.scm  --  Skribilo settings as parameter objects.
+;;;
+;;; Copyright 2005  Ludovic Courtès <ludovic.courtes@laas.fr>
+;;;
+;;;
+;;; This program is free software; you can redistribute it and/or modify
+;;; it under the terms of the GNU General Public License as published by
+;;; the Free Software Foundation; either version 2 of the License, or
+;;; (at your option) any later version.
+;;;
+;;; This program is distributed in the hope that it will be useful,
+;;; but WITHOUT ANY WARRANTY; without even the implied warranty of
+;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+;;; GNU General Public License for more details.
+;;;
+;;; You should have received a copy of the GNU General Public License
+;;; along with this program; if not, write to the Free Software
+;;; Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
+;;; USA.
+
+(define-module (skribilo parameters)
+  :use-module (srfi srfi-39))
+
+;;; Author:  Ludovic Courtès
+;;;
+;;; Commentary:
+;;;
+;;; This module defines parameter objects that may be used to specify
+;;; run-time parameters of a Skribilo process.
+;;;
+;;; Code:
+
+
+;;;
+;;; Switches.
+;;;
+
+(define (make-expect pred pred-name parameter)
+  (let ((msg (string-append parameter ": " pred-name " expected")))
+    (lambda (val)
+      (if (pred val)
+	  val
+	  (error msg val)))))
+
+(define-macro (define-number-parameter name)
+  `(define-public ,name
+     (make-parameter 0
+		     (make-expect number? "number" ,(symbol->string name)))))
+
+(define-number-parameter *verbose*)
+(define-number-parameter *warning*)
+
+(define-public *load-rc-file?* (make-parameter #f))
+
+;;;
+;;; Paths.
+;;;
+
+
+(define-macro (define-path-parameter name)
+  `(define-public ,name
+     (make-parameter (list ".")
+		     (make-expect list? "list" ,(symbol->string name)))))
+
+
+(define-path-parameter *document-path*)
+(define-path-parameter *bib-path*)
+(define-path-parameter *source-path*)
+(define-path-parameter *image-path*)
+
+
+;;;
+;;; Files.
+;;;
+
+(define-public *destination-file* (make-parameter "output.html"))
+(define-public *source-file*      (make-parameter "default-input-file.skb"))
+
+;; Base prefix to remove from hyperlinks.
+(define-public *ref-base*         (make-parameter ""))
+
+;;; TODO: Skribe used to have other parameters as global variables.  See
+;;; which ones need to be kept.
+
+
+;;; arch-tag: 3c0d2e18-b997-4615-8a3d-b6622ae28874
+
+;;; parameters.scm ends here