#!/usr/bin/guile \
-e "(scripts display-commentary)" -s
!#
;;; display-commentary --- As advertized

;; 	Copyright (C) 2001,2003,2004 Free Software Foundation, Inc.
;;
;; 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, 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 software; see the file COPYING.  If not, write to
;; the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
;; Boston, MA 02110-1301, USA.
;;
;; As a special exception, the Free Software Foundation gives permission
;; for additional uses of the text contained in its release of GUILE.
;;
;; The exception is that, if you link the GUILE library with other files
;; to produce an executable, this does not by itself cause the
;; resulting executable to be covered by the GNU General Public License.
;; Your use of that executable is in no way restricted on account of
;; linking the GUILE library code into it.
;;
;; This exception does not however invalidate any other reasons why
;; the executable file might be covered by the GNU General Public License.
;;
;; This exception applies only to the code released by the
;; Free Software Foundation under the name GUILE.  If you copy
;; code from other Free Software Foundation releases into a copy of
;; GUILE, as the General Public License permits, the exception does
;; not apply to the code that you add in this way.  To avoid misleading
;; anyone as to the status of such modified files, you must delete
;; this exception notice from them.
;;
;; If you write modifications of your own for GUILE, it is your choice
;; whether to permit this exception to apply to your modifications.
;; If you do not wish that, delete this exception notice.

;;; Author: Thien-Thi Nguyen <ttn@gnu.org>

;;; Commentary:

;; Usage: display-commentary REF1 REF2 ...
;;
;; Display Commentary section from REF1, REF2 and so on, when available.
;; Each REF may be a filename or module name (list of symbols).

;;; Code:

(define-module (scripts display-commentary)
  #:autoload (scripts PROGRAM) (HVQC-MAIN)
  #:autoload (ice-9 documentation) (module-commentary file-commentary)
  #:export (display-commentary))

(define (display-commentary . refs)
  (for-each (lambda (ref)
              (and (string? ref)
                   (equal? 0 (string-index ref #\())
                   (set! ref (with-input-from-string ref read)))
              (and=> ((if (list? ref) module-commentary file-commentary) ref)
                     (lambda (c)
                       (or (= 0 (string-length c))
                           (simple-format #t "~A commentary:\n~A" ref c)))))
            refs))

(define (main args)
  (HVQC-MAIN args (lambda (args)
                    (apply display-commentary (cdr args)))
             '(usage . commentary)
             '(package . "Guile")))

;;; display-commentary ends here
