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- ;;; upd-copyr.el --- update the copyright notice in a GNU Emacs Lisp file
-
- ;;; Copyright (C) 1991, 1992, 1993 Free Software Foundation, Inc.
-
- ;; Author: Roland McGrath <roland@gnu.ai.mit.edu>
- ;; Keywords: maint
-
- ;;; This file is part of GNU Emacs.
-
- ;;; 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.
- ;;;
- ;;; A copy of the GNU General Public License can be obtained from this
- ;;; program's author (send electronic mail to roland@ai.mit.edu) or from
- ;;; the Free Software Foundation, Inc., 675 Mass Ave, Cambridge, MA
- ;;; 02139, USA.
-
- ;;; Code:
-
- (defconst current-year (substring (current-time-string) -4)
- "String representing the current year.")
-
- (defvar current-gpl-version "2"
- "String representing the current version of the GPL.")
-
- ;;;###autoload
- (defvar replace-copying-with nil
- "*If non-nil, replace copying notices with this file.")
-
- (defvar inhibit-update-copyright nil
- "If nil, ask the user whether or not to update the copyright notice.
- If the user has said no, we set this to t locally.")
-
- ;;;###autoload
- (defun update-copyright (&optional replace ask-upd ask-year)
- "Update the copyright notice at the beginning of the buffer
- to indicate the current year. If optional arg REPLACE is given
- \(interactively, with prefix arg\) replace the years in the notice
- rather than adding the current year after them.
- If `replace-copying-with' is set, the copying permissions following the
- copyright are replaced as well.
-
- If optional third argument ASK is non-nil, the user is prompted for whether
- or not to update the copyright. If optional fourth argument ASK-YEAR is
- non-nil, the user is prompted for whether or not to replace the year rather
- than adding to it."
- (interactive "*P")
- (save-excursion
- (save-restriction
- (widen)
- (goto-char (point-min))
- ;; Handle abbreviated year lists like "1800, 01, 02, 03".
- (if (re-search-forward (concat (substring current-year 0 2)
- "\\([0-9][0-9]\\(,\\s \\)+\\)*"
- (substring current-year 2))
- nil t)
- (or ask-upd
- (message "Copyright notice already includes %s." current-year))
- (goto-char (point-min))
- (if (and (not inhibit-update-copyright)
- (or (not ask-upd)
- ;; If implicit, narrow it down to things that
- ;; look like GPL notices.
- (prog1
- (search-forward "is free software" nil t)
- (goto-char (point-min))))
- (re-search-forward
- "[Cc]opyright[^0-9]*\\(\\([-, \t]*\\([0-9]+\\)\\)\\)+"
- nil t)
- (or (not ask-upd)
- (save-window-excursion
- (pop-to-buffer (current-buffer))
- (save-excursion
- ;; Show the user the copyright.
- (goto-char (point-min))
- (sit-for 0)
- (or (y-or-n-p "Update copyright? ")
- (progn
- (set (make-local-variable
- 'inhibit-update-copyright) t)
- nil))))))
- (progn
- (setq replace
- (or replace
- (and ask-year
- (save-window-excursion
- (pop-to-buffer (current-buffer))
- (save-excursion
- ;; Show the user the copyright.
- (goto-char (point-min))
- (sit-for 0)
- (y-or-n-p "Replace copyright year? "))))))
- (if replace
- (delete-region (match-beginning 1) (match-end 1))
- (insert ", "))
- (insert current-year)
- (message "Copyright updated to %s%s."
- (if replace "" "include ") current-year)
- (if replace-copying-with
- (let ((case-fold-search t)
- beg)
- (goto-char (point-min))
- ;; Find the beginning of the copyright.
- (if (search-forward "copyright" nil t)
- (progn
- ;; Look for a blank line or a line
- ;; containing only comment chars.
- (if (re-search-forward "^\\(\\s \\s<\\|\\s>\\)*$" nil t)
- (forward-line 1)
- (with-output-to-temp-buffer "*Help*"
- (princ (substitute-command-keys "\
- I don't know where the copying notice begins.
- Put point there and hit \\[exit-recursive-edit]."))
- (recursive-edit)))
- (setq beg (point))
- (or (search-forward "02139, USA." nil t)
- (with-output-to-temp-buffer "*Help*"
- (princ (substitute-command-keys "\
- I don't know where the copying notice ends.
- Put point there and hit \\[exit-recursive-edit]."))
- (recursive-edit)))
- (delete-region beg (point))))
- (insert-file replace-copying-with))
- (if (re-search-forward
- "; either version \\(.+\\), or (at your option)"
- nil t)
- (progn
- (goto-char (match-beginning 1))
- (delete-region (point) (match-end 1))
- (insert current-gpl-version))))
- (or ask-upd
- (error "This buffer contains no copyright notice!"))))))))
-
- ;;;###autoload
- (defun ask-to-update-copyright ()
- "If the current buffer contains a copyright notice that is out of date,
- ask the user if it should be updated with `update-copyright' (which see).
- Put this on write-file-hooks."
- (update-copyright nil t t)
- ;; Be sure return nil; if a write-file-hook return non-nil,
- ;; the file is presumed to be already written.
- nil)
-
- (provide 'upd-copyr)
-
- ;;; upd-copyr.el ends here
-