;;; gnus-news.el --- a hack to create GNUS-NEWS from texinfo source
;; Copyright (C) 2004, 2005, 2006, 2007, 2008, 2009, 2010  Free Software Foundation, Inc.

;; Author: Reiner Steib  <Reiner.Steib@gmx.de>
;; Keywords: tools

;; This file is part of GNU Emacs.

;; GNU Emacs 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 3 of the License, or
;; (at your option) any later version.

;; GNU Emacs 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 GNU Emacs.  If not, see <http://www.gnu.org/licenses/>.

;;; Commentary:

;;; Code:

(defvar gnus-news-header-disclaimer
"GNUS NEWS -- history of user-visible changes.

Copyright (C) 1999, 2000, 2001, 2002, 2003, 2004, 2005,
   2006, 2007, 2008, 2009, 2010  Free Software Foundation, Inc.
See the end of the file for license conditions.

Please send Gnus bug reports to bugs@gnus.org.
For older news, see Gnus info node \"New Features\".\n\n")

(defvar gnus-news-trailer
"
* For older news, see Gnus info node \"New Features\".

----------------------------------------------------------------------

This file is part of GNU Emacs.

GNU Emacs 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 3 of the License, or
\(at your option) any later version.

GNU Emacs 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 GNU Emacs.  If not, see <http://www.gnu.org/licenses/>.

\nLocal variables:\nmode: outline
paragraph-separate: \"[ 	]*$\"\nend:\n")

(defvar gnus-news-makeinfo-command "makeinfo")

(defvar gnus-news-fill-column 80)

(defvar gnus-news-makeinfo-switches
  (concat " --no-headers --paragraph-indent=0"
	  " --no-validate" ;; Allow unresolved references.
	  " --fill-column=" (number-to-string
			     (+ 3 ;; will strip leading spaces later
				(or gnus-news-fill-column 80)))))

(defun batch-gnus-news ()
  "Make GNUS-NEWS in batch mode."
  (let (infile outfile)
    (setq infile (car command-line-args-left)
	  command-line-args-left (cdr command-line-args-left)
	  outfile (car command-line-args-left)
	  command-line-args-left nil)
    (if (and infile outfile)
	(message "Creating `%s' from `%s'..." outfile infile)
      (error "Not enough files given."))
    (gnus-news-translate-file infile outfile)))

(defun gnus-news-translate-file (infile outfile)
  "Translate INFILE (texinfo) to OUTFILE (GNUS-NEWS)."
  (let* ((dir (concat (or (getenv "srcdir") ".") "/"))
	 (infile (concat dir infile))
	 (buffer (find-file-noselect (concat dir outfile))))
    (with-temp-buffer
      ;; Could be done using `texinfmt' stuff as in `infohack.el'.
      (insert
       (shell-command-to-string
	(concat gnus-news-makeinfo-command " "
		gnus-news-makeinfo-switches " " infile)))
      (goto-char (point-max))
      (delete-char -1)
      (goto-char (point-min))
      (save-excursion
	(while (re-search-forward "^   \\* " nil t)
	  (replace-match "\f\n* ")))
      (save-excursion
	(while (re-search-forward "^        \\* " nil t)
	  (replace-match "** ")))
      (save-excursion
	(while (re-search-forward "^     " nil t)
	  (replace-match "")))
      ;; Avoid `*' from @ref at beginning of line:
      (save-excursion
	(while (re-search-forward "^\\*Note" nil t)
	  (replace-match " \\&")))
      (goto-char (point-min))
      (insert gnus-news-header-disclaimer)
      (goto-char (point-max))
      (insert gnus-news-trailer)
      (write-region (point-min) (point-max) outfile))))

;;; gnus-news.el ends here