(defgroup copyright nil
"Update the copyright notice in current buffer."
:group 'tools)
(defcustom copyright-limit 2000
"*Don't try to update copyright beyond this position unless interactive.
`nil' means to search whole buffer."
:group 'copyright
:type '(choice (integer :tag "Limit")
(const :tag "No limit")))
(defcustom copyright-regexp
"\\([\251]\\|@copyright{}\\|[Cc]opyright\\s *:?\\s *(C)\
\\|[Cc]opyright\\s *:?\\s *[\251]\\)\
\\s *\\([1-9][-0-9, ']*[0-9]+\\)"
"*What your copyright notice looks like.
The second \\( \\) construct must match the years."
:group 'copyright
:type 'regexp)
(defcustom copyright-query 'function
"*If non-`nil', ask user before changing copyright.
When this is `function', only ask when called non-interactively."
:group 'copyright
:type '(choice (const :tag "Do not ask")
(const :tag "Ask unless interactive" function)
(other :tag "Ask" t)))
(defconst copyright-current-gpl-version "2"
"String representing the current version of the GPL or `nil'.")
(defvar copyright-update t)
(defvar copyright-current-year "2001"
"String representing the current year.")
(defun copyright-update (&optional arg)
"Update the copyright notice at the beginning of the buffer to indicate
the current year. If optional prefix ARG is given replace the years in the
notice rather than adding the current year after them. If necessary and
`copyright-current-gpl-version' is set, the copying permissions following the
copyright, if any, are updated as well."
(interactive "*P")
(if copyright-update
(save-excursion
(save-restriction
(widen)
(goto-char (point-min))
(setq copyright-current-year (substring (current-time-string) -4))
(if (re-search-forward copyright-regexp copyright-limit t)
(if (string= (buffer-substring (- (match-end 2) 2) (match-end 2))
(substring copyright-current-year -2))
()
(if (or (not copyright-query)
(and (eq copyright-query 'function)
(eq this-command 'copyright-update))
(y-or-n-p (if arg
(concat "Replace copyright year(s) by "
copyright-current-year "? ")
(concat "Add " copyright-current-year
" to copyright? "))))
(if arg
(progn
(delete-region (match-beginning 1) (match-end 1))
(insert copyright-current-year))
(setq arg (save-excursion (skip-chars-backward "0-9")))
(if (and (eq (% (- (string-to-number
copyright-current-year)
(string-to-number (buffer-substring
(+ (point) arg)
(point))))
100)
1)
(or (eq (char-after (+ (point) arg -1)) ?-)
(eq (char-after (+ (point) arg -2)) ?-)))
(delete-char arg)
(insert ", ")
(if (eq (char-after (+ (point) arg -3)) ?')
(insert ?')))
(insert (substring copyright-current-year arg))))))
(goto-char (point-min))
(and copyright-current-gpl-version
(re-search-forward "\\(the Free Software Foundation; either \\|; a\\^u eldono \\([0-9]+\\)a, ? a\\^u (la\\^u via \\)version \\([0-9]+\\), or (at"
copyright-limit t)
(not (string= (buffer-substring (match-beginning 3) (match-end 3))
copyright-current-gpl-version))
(or (not copyright-query)
(and (eq copyright-query 'function)
(eq this-command 'copyright-update))
(y-or-n-p (concat "Replace GPL version by "
copyright-current-gpl-version "? ")))
(progn
(if (match-end 2)
(progn
(delete-region (match-beginning 2) (match-end 2))
(goto-char (match-beginning 2))
(insert copyright-current-gpl-version)))
(delete-region (match-beginning 3) (match-end 3))
(goto-char (match-beginning 3))
(insert copyright-current-gpl-version))))
(set (make-local-variable 'copyright-update) nil)))
nil)
(define-skeleton copyright
"Insert a copyright by $ORGANIZATION notice at cursor."
"Company: "
comment-start
"Copyright (C) " `(substring (current-time-string) -4) " by "
(or (getenv "ORGANIZATION")
str)
'(if (> (point) copyright-limit)
(message "Copyright extends beyond `copyright-limit' and won't be updated automatically."))
comment-end)
(provide 'copyright)