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622b7ede1c
(time-stamp-format): Use %Y not %y in default value. (time-stamp): Verify time-stamp-line-limit is a number. (time-stamp-string-preprocess): Handle %F correctly.
364 lines
13 KiB
EmacsLisp
364 lines
13 KiB
EmacsLisp
;;; time-stamp.el --- Maintain last change time stamps in files edited by Emacs
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;; Copyright 1989, 1993, 1994, 1995 Free Software Foundation, Inc.
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;; Maintainer's Time-stamp: <1997-04-28 11:51:22 gildea>
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;; Maintainer: Stephen Gildea <gildea@alum.mit.edu>
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;; Keywords: tools
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;; This file is free software; you can redistribute it and/or modify
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;; it under the terms of the GNU General Public License as published by
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;; the Free Software Foundation; either version 2, or (at your option)
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;; any later version.
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;; This file is distributed in the hope that it will be useful,
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;; but WITHOUT ANY WARRANTY; without even the implied warranty of
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;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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;; GNU General Public License for more details.
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;; You should have received a copy of the GNU General Public License
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;; along with GNU Emacs; see the file COPYING. If not, write to the
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;; Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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;; Boston, MA 02111-1307, USA.
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;;; Commentary:
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;; A template in a file can be updated with a new time stamp when
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;; you save the file. For example:
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;; static char *ts = "sdmain.c Time-stamp: <1996-08-13 10:20:51 gildea>";
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;; See the top of `time-stamp.el' for another example.
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;; To use time-stamping, add this line to your .emacs file:
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;; (add-hook 'write-file-hooks 'time-stamp)
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;; Now any time-stamp templates in your files will be updated automatically.
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;; See the documentation for the functions `time-stamp'
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;; and `time-stamp-toggle-active' for details.
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;;; Code:
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(defgroup time-stamp nil
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"Maintain last change time stamps in files edited by Emacs."
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:group 'data
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:group 'extensions)
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(defcustom time-stamp-active t
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"*Non-nil to enable time-stamping of buffers by \\[time-stamp].
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Can be toggled by \\[time-stamp-toggle-active].
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See also the variable `time-stamp-warn-inactive'."
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:type 'boolean
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:group 'time-stamp)
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(defcustom time-stamp-warn-inactive t
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"Non-nil to have \\[time-stamp] warn if a buffer did not get time-stamped.
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A warning is printed if `time-stamp-active' is nil and the buffer contains
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a time stamp template that would otherwise have been updated."
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:type 'boolean
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:group 'time-stamp)
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(defcustom time-stamp-old-format-warn 'ask
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"Action to take if `time-stamp-format' is an old-style list.
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If `error', the format is not used. If `ask', the user is queried about
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using the time-stamp-format. If `warn', a warning is displayed.
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If nil, no notification is given."
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:type '(choice (const :tag "No notification" nil)
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(const :tag "Don't use the format" error)
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(const ask) (const warn))
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:group 'time-stamp)
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(defcustom time-stamp-format "%Y-%02m-%02d %02H:%02M:%02S %u"
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"*Format of the string inserted by \\[time-stamp].
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The value may be a string or a list. Lists are supported only for
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backward compatibility; see variable `time-stamp-old-format-warn'.
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A string is used with `format-time-string'.
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In addition to the features of `format-time-string',
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you can use the following %-constructs:
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%f file name without directory
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%F full file name
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%h mail host name
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%s system name
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%u user's login name
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For example, to get the format used by the `date' command,
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use \"%3a %3b %2d %02H:%02M:%02S %Z %Y\"."
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:type 'string
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:group 'time-stamp)
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;;; Do not change time-stamp-line-limit, time-stamp-start, or
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;;; time-stamp-end in your .emacs or you will be incompatible
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;;; with other people's files! If you must change them,
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;;; do so only in the local variables section of the file itself.
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(defvar time-stamp-line-limit 8 ;Do not change!
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"Lines of a file searched; positive counts from start, negative from end.
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The patterns `time-stamp-start' and `time-stamp-end' must be found on one
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of the first (last) `time-stamp-line-limit' lines of the file for the
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file to be time-stamped by \\[time-stamp].
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Do not change `time-stamp-line-limit', `time-stamp-start', or
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`time-stamp-end' for yourself or you will be incompatible
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with other people's files! If you must change them for some application,
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do so in the local variables section of the time-stamped file itself.")
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(defvar time-stamp-start "Time-stamp:[ \t]+\\\\?[\"<]+" ;Do not change!
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"Regexp after which the time stamp is written by \\[time-stamp].
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See also the variables `time-stamp-end' and `time-stamp-line-limit'.
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Do not change `time-stamp-line-limit', `time-stamp-start', or
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`time-stamp-end' for yourself or you will be incompatible
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with other people's files! If you must change them for some application,
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do so in the local variables section of the time-stamped file itself.")
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(defvar time-stamp-end "\\\\?[\">]" ;Do not change!
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"Regexp marking the text after the time stamp.
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\\[time-stamp] deletes the text between the first match of `time-stamp-start'
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and the following match of `time-stamp-end' on the same line,
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then writes the time stamp specified by `time-stamp-format' between them.
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Do not change `time-stamp-line-limit', `time-stamp-start', or
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`time-stamp-end' for yourself or you will be incompatible
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with other people's files! If you must change them for some application,
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do so in the local variables section of the time-stamped file itself.")
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;;;###autoload
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(defun time-stamp ()
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"Update the time stamp string in the buffer.
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A template in a file can be automatically updated with a new time stamp
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every time you save the file. Add this line to your .emacs file:
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(add-hook 'write-file-hooks 'time-stamp)
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Normally the template must appear in the first 8 lines of a file and
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look like one of the following:
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Time-stamp: <>
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Time-stamp: \" \"
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The time stamp is written between the brackets or quotes:
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Time-stamp: <1996-07-18 10:20:51 gildea>
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The time stamp is updated only if the variable `time-stamp-active' is non-nil.
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The format of the time stamp is set by the variable `time-stamp-format'.
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The variables `time-stamp-line-limit', `time-stamp-start',
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and `time-stamp-end' control finding the template."
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(interactive)
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(let ((case-fold-search nil)
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(start nil)
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(end nil)
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search-limit
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(line-limit time-stamp-line-limit))
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(cond ((not (integerp line-limit))
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(setq line-limit 8)
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(message "time-stamp-line-limit is not a number")
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(sit-for 1)))
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(save-excursion
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(save-restriction
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(widen)
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(cond ((> line-limit 0)
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(goto-char (setq start (point-min)))
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(forward-line line-limit)
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(setq search-limit (point)))
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(t
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(goto-char (setq search-limit (point-max)))
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(forward-line line-limit)
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(setq start (point))))
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(goto-char start)
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(while (and (< (point) search-limit)
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(not end)
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(re-search-forward time-stamp-start search-limit 'move))
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(setq start (point))
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(end-of-line)
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(let ((line-end (point)))
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(goto-char start)
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(if (re-search-forward time-stamp-end line-end 'move)
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(setq end (match-beginning 0)))))))
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(if end
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(progn
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;; do all warnings outside save-excursion
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(cond
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((not time-stamp-active)
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(if time-stamp-warn-inactive
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;; don't signal an error in a write-file-hook
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(progn
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(message "Warning: time-stamp-active is off; did not time-stamp buffer.")
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(sit-for 1))))
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((not (and (stringp time-stamp-start)
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(stringp time-stamp-end)))
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(message "time-stamp-start or time-stamp-end is not a string")
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(sit-for 1))
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(t
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(let ((new-time-stamp (time-stamp-string)))
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(if (stringp new-time-stamp)
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(save-excursion
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(save-restriction
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(widen)
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(delete-region start end)
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(goto-char start)
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(insert new-time-stamp)
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(setq end (point))
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;; remove any tabs used to format time stamp
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(goto-char start)
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(if (search-forward "\t" end t)
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(untabify start end)))))))))))
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;; be sure to return nil so can be used on write-file-hooks
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nil)
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;;;###autoload
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(defun time-stamp-toggle-active (&optional arg)
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"Toggle `time-stamp-active', setting whether \\[time-stamp] updates a buffer.
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With arg, turn time stamping on if and only if arg is positive."
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(interactive "P")
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(setq time-stamp-active
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(if (null arg)
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(not time-stamp-active)
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(> (prefix-numeric-value arg) 0)))
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(message "time-stamp is now %s." (if time-stamp-active "active" "off")))
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(defconst time-stamp-no-file "(no file)"
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"String to use when the buffer is not associated with a file.")
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(defun time-stamp-string-preprocess (format)
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"Process occurrences in FORMAT of %f, %F, %h, %s and %u.
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These are replaced with the file name (nondirectory part),
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full file name, host name for mail, system name, and user name.
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Do not alter other %-combinations, and do detect %%."
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(let ((result "") (pos 0) (case-fold-search nil))
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(while (string-match "%[%uhfFs]" format pos)
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(setq result (concat result (substring format pos (match-beginning 0))))
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(let ((char (aref format (1+ (match-beginning 0)))))
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(cond ((= char ?%)
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(setq result (concat result "%%")))
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((= char ?u)
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(setq result (concat result (user-login-name))))
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((= char ?f)
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(setq result (concat result
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(if buffer-file-name
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(file-name-nondirectory buffer-file-name)
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time-stamp-no-file))))
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((= char ?F)
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(setq result (concat result
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(or buffer-file-name time-stamp-no-file))))
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((= char ?s)
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(setq result (concat result (system-name))))
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((= char ?h)
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(setq result (concat result (time-stamp-mail-host-name))))))
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(setq pos (match-end 0)))
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(concat result (substring format pos))))
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(defun time-stamp-string ()
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"Generate the new string to be inserted by \\[time-stamp]."
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(if (stringp time-stamp-format)
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(format-time-string (time-stamp-string-preprocess time-stamp-format))
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;; handle version 1 compatibility
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(cond ((or (eq time-stamp-old-format-warn 'error)
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(and (eq time-stamp-old-format-warn 'ask)
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(not (y-or-n-p "Use non-string time-stamp-format? "))))
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(message "Warning: no time-stamp: time-stamp-format not a string")
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(sit-for 1)
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nil)
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(t
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(cond ((eq time-stamp-old-format-warn 'warn)
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(message "Obsolescent time-stamp-format type; should be string")
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(sit-for 1)))
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(time-stamp-fconcat time-stamp-format " ")))))
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(defconst time-stamp-no-file "(no file)"
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"String to use when the buffer is not associated with a file.")
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(defun time-stamp-mail-host-name ()
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"Return the name of the host where the user receives mail.
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This is the value of `mail-host-address' if bound and a string,
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otherwise the value of the function system-name."
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(or (and (boundp 'mail-host-address)
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(stringp mail-host-address)
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mail-host-address)
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(system-name)))
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;;; the rest of this file is for version 1 compatibility
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(defun time-stamp-fconcat (list sep)
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"Similar to (mapconcat 'funcall LIST SEP) but LIST allows literals.
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If an element of LIST is a symbol, it is funcalled to get the string to use;
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the separator SEP is used between two strings obtained by funcalling a
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symbol. Otherwise the element itself is inserted; no separator is used
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around literals."
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(let ((return-string "")
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(insert-sep-p nil))
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(while list
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(cond ((symbolp (car list))
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(if insert-sep-p
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(setq return-string (concat return-string sep)))
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(setq return-string (concat return-string (funcall (car list))))
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(setq insert-sep-p t))
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(t
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(setq return-string (concat return-string (car list)))
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(setq insert-sep-p nil)))
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(setq list (cdr list)))
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return-string))
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;;; Some functions used in time-stamp-format
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;;; Could generate most of a message-id with
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;;; '(time-stamp-yymmdd "" time-stamp-hhmm "@" time-stamp-mail-host-name)
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;;; pretty form, suitable for a title page
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(defun time-stamp-month-dd-yyyy ()
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"Return the current date as a string in \"Month DD, YYYY\" form."
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(format-time-string "%B %e, %Y"))
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(defun time-stamp-dd/mm/yyyy ()
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"Return the current date as a string in \"DD/MM/YYYY\" form."
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(format-time-string "%d/%m/%Y"))
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;;; same as __DATE__ in ANSI C
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(defun time-stamp-mon-dd-yyyy ()
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"Return the current date as a string in \"Mon DD YYYY\" form.
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The first character of DD is space if the value is less than 10."
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(format-time-string "%b %d %Y"))
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;;; RFC 822 date
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(defun time-stamp-dd-mon-yy ()
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"Return the current date as a string in \"DD Mon YY\" form."
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(format-time-string "%d %b %y"))
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;;; RCS 3 date
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(defun time-stamp-yy/mm/dd ()
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"Return the current date as a string in \"YY/MM/DD\" form."
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(format-time-string "%y/%m/%d"))
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;;; RCS 5 date
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(defun time-stamp-yyyy/mm/dd ()
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"Return the current date as a string in \"YYYY/MM/DD\" form."
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(format-time-string "%Y/%m/%d"))
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;;; ISO 8601 date
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(defun time-stamp-yyyy-mm-dd ()
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"Return the current date as a string in \"YYYY-MM-DD\" form."
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(format-time-string "%Y-%m-%d"))
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(defun time-stamp-yymmdd ()
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"Return the current date as a string in \"YYMMDD\" form."
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(format-time-string "%y%m%d"))
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(defun time-stamp-hh:mm:ss ()
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"Return the current time as a string in \"HH:MM:SS\" form."
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(format-time-string "%T"))
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(defun time-stamp-hhmm ()
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"Return the current time as a string in \"HHMM\" form."
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(format-time-string "%H%M"))
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(provide 'time-stamp)
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;;; time-stamp.el ends here
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