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60370d40 | 1 | ;;; midnight.el --- run something every midnight, e.g., kill old buffers |
ac06bd0f | 2 | |
acaf905b | 3 | ;; Copyright (C) 1998, 2001-2012 Free Software Foundation, Inc. |
ac06bd0f | 4 | |
a764697e SS |
5 | ;; Author: Sam Steingold <sds@gnu.org> |
6 | ;; Maintainer: Sam Steingold <sds@gnu.org> | |
60370d40 PJ |
7 | ;; Created: 1998-05-18 |
8 | ;; Keywords: utilities | |
ac06bd0f RS |
9 | |
10 | ;; This file is part of GNU Emacs. | |
11 | ||
eb3fa2cf | 12 | ;; GNU Emacs is free software: you can redistribute it and/or modify |
ac06bd0f | 13 | ;; it under the terms of the GNU General Public License as published by |
eb3fa2cf GM |
14 | ;; the Free Software Foundation, either version 3 of the License, or |
15 | ;; (at your option) any later version. | |
ac06bd0f RS |
16 | |
17 | ;; GNU Emacs is distributed in the hope that it will be useful, | |
18 | ;; but WITHOUT ANY WARRANTY; without even the implied warranty of | |
19 | ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
20 | ;; GNU General Public License for more details. | |
21 | ||
22 | ;; You should have received a copy of the GNU General Public License | |
eb3fa2cf | 23 | ;; along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>. |
ac06bd0f RS |
24 | |
25 | ;;; Commentary: | |
26 | ||
27 | ;; To use the file, put (require 'midnight) into your .emacs. Then, at | |
28 | ;; midnight, Emacs will run the normal hook `midnight-hook'. You can | |
29 | ;; put whatever you like there, say, `calendar'; by default there is | |
30 | ;; only one function there - `clean-buffer-list'. It will kill the | |
31 | ;; buffers matching `clean-buffer-list-kill-buffer-names' and | |
32 | ;; `clean-buffer-list-kill-regexps' and the buffers which where last | |
33 | ;; displayed more than `clean-buffer-list-delay-general' days ago, | |
34 | ;; keeping `clean-buffer-list-kill-never-buffer-names' and | |
35 | ;; `clean-buffer-list-kill-never-regexps'. | |
36 | ||
9cc077f6 RS |
37 | ;;; Code: |
38 | ||
849ac835 | 39 | (eval-when-compile |
51eb1909 KH |
40 | (require 'cl)) |
41 | ||
ac06bd0f RS |
42 | (defgroup midnight nil |
43 | "Run something every day at midnight." | |
1e484d64 DN |
44 | :group 'calendar |
45 | :version "20.3") | |
ac06bd0f | 46 | |
ed4761a9 RS |
47 | (defvar midnight-timer nil |
48 | "Timer running the `midnight-hook' `midnight-delay' seconds after midnight. | |
49 | Use `cancel-timer' to stop it and `midnight-delay-set' to change | |
50 | the time when it is run.") | |
51 | ||
6d9d01a9 | 52 | (defcustom midnight-mode nil |
9201cc28 | 53 | "Non-nil means run `midnight-hook' at midnight. |
e9d7cff0 RS |
54 | Setting this variable outside customize has no effect; |
55 | call `cancel-timer' or `timer-activate' on `midnight-timer' instead." | |
56 | :type 'boolean | |
57 | :group 'midnight | |
58 | :require 'midnight | |
6d9d01a9 | 59 | :initialize 'custom-initialize-default |
e9d7cff0 RS |
60 | :set (lambda (symb val) |
61 | (set symb val) (require 'midnight) | |
62 | (if val (timer-activate midnight-timer) | |
63 | (cancel-timer midnight-timer)))) | |
64 | ||
ac06bd0f RS |
65 | ;;; time conversion |
66 | ||
33068c28 JB |
67 | (defun midnight-buffer-display-time (&optional buffer) |
68 | "Return the time-stamp of BUFFER, or current buffer, as float." | |
69 | (with-current-buffer (or buffer (current-buffer)) | |
a1f84f6d | 70 | (when buffer-display-time (float-time buffer-display-time)))) |
ac06bd0f RS |
71 | |
72 | ;;; clean-buffer-list stuff | |
73 | ||
74 | (defcustom clean-buffer-list-delay-general 3 | |
9201cc28 | 75 | "The number of days before any buffer becomes eligible for autokilling. |
ac06bd0f RS |
76 | The autokilling is done by `clean-buffer-list' when is it in `midnight-hook'. |
77 | Currently displayed and/or modified (unsaved) buffers, as well as buffers | |
78 | matching `clean-buffer-list-kill-never-buffer-names' and | |
79 | `clean-buffer-list-kill-never-regexps' are excluded." | |
80 | :type 'integer | |
1e484d64 | 81 | :group 'midnight) |
ac06bd0f RS |
82 | |
83 | (defcustom clean-buffer-list-delay-special 3600 | |
9201cc28 | 84 | "The number of seconds before some buffers become eligible for autokilling. |
ac06bd0f RS |
85 | Buffers matched by `clean-buffer-list-kill-regexps' and |
86 | `clean-buffer-list-kill-buffer-names' are killed if they were last | |
87 | displayed more than this many seconds ago." | |
88 | :type 'integer | |
1e484d64 | 89 | :group 'midnight) |
ac06bd0f | 90 | |
b2f9ab3c | 91 | (defcustom clean-buffer-list-kill-regexps nil |
9201cc28 | 92 | "List of regexps saying which buffers will be killed at midnight. |
ac06bd0f RS |
93 | If buffer name matches a regexp in the list and the buffer was not displayed |
94 | in the last `clean-buffer-list-delay-special' seconds, it is killed by | |
95 | `clean-buffer-list' when is it in `midnight-hook'. | |
f40c9c7b | 96 | If a member of the list is a cons, its `car' is the regexp and its `cdr' is |
ac06bd0f RS |
97 | the number of seconds to use instead of `clean-buffer-list-delay-special'. |
98 | See also `clean-buffer-list-kill-buffer-names', | |
99 | `clean-buffer-list-kill-never-regexps' and | |
100 | `clean-buffer-list-kill-never-buffer-names'." | |
1e5a4438 | 101 | :type '(repeat (regexp :tag "Regexp matching Buffer Name")) |
1e484d64 | 102 | :group 'midnight) |
ac06bd0f RS |
103 | |
104 | (defcustom clean-buffer-list-kill-buffer-names | |
b2f9ab3c | 105 | '("*Help*" "*Apropos*" "*Man " "*Buffer List*" "*Compile-Log*" "*info*" |
9cc077f6 | 106 | "*vc*" "*vc-diff*" "*diff*") |
9201cc28 | 107 | "List of strings saying which buffers will be killed at midnight. |
ac06bd0f RS |
108 | Buffers with names in this list, which were not displayed in the last |
109 | `clean-buffer-list-delay-special' seconds, are killed by `clean-buffer-list' | |
110 | when is it in `midnight-hook'. | |
f40c9c7b | 111 | If a member of the list is a cons, its `car' is the name and its `cdr' is |
ac06bd0f RS |
112 | the number of seconds to use instead of `clean-buffer-list-delay-special'. |
113 | See also `clean-buffer-list-kill-regexps', | |
114 | `clean-buffer-list-kill-never-regexps' and | |
115 | `clean-buffer-list-kill-never-buffer-names'." | |
1e5a4438 | 116 | :type '(repeat (string :tag "Buffer Name")) |
1e484d64 | 117 | :group 'midnight) |
ac06bd0f RS |
118 | |
119 | (defcustom clean-buffer-list-kill-never-buffer-names | |
db0e305d | 120 | '("*scratch*" "*Messages*") |
9201cc28 | 121 | "List of buffer names which will never be killed by `clean-buffer-list'. |
ac06bd0f RS |
122 | See also `clean-buffer-list-kill-never-regexps'. |
123 | Note that this does override `clean-buffer-list-kill-regexps' and | |
124 | `clean-buffer-list-kill-buffer-names' so a buffer matching any of these | |
125 | two lists will NOT be killed if it is also present in this list." | |
1e5a4438 | 126 | :type '(repeat (string :tag "Buffer Name")) |
1e484d64 DN |
127 | :group 'midnight) |
128 | ||
b3275b47 | 129 | (defcustom clean-buffer-list-kill-never-regexps '("^ \\*Minibuf-.*\\*$") |
9201cc28 | 130 | "List of regexp saying which buffers will never be killed at midnight. |
ac06bd0f RS |
131 | See also `clean-buffer-list-kill-never-buffer-names'. |
132 | Killing is done by `clean-buffer-list'. | |
133 | Note that this does override `clean-buffer-list-kill-regexps' and | |
134 | `clean-buffer-list-kill-buffer-names' so a buffer matching any of these | |
135 | two lists will NOT be killed if it also matches anything in this list." | |
1e5a4438 | 136 | :type '(repeat (regexp :tag "Regexp matching Buffer Name")) |
1e484d64 | 137 | :group 'midnight) |
ac06bd0f RS |
138 | |
139 | (defun midnight-find (el ls test &optional key) | |
140 | "A stopgap solution to the absence of `find' in ELisp." | |
9cc077f6 | 141 | (dolist (rr ls) |
b3275b47 | 142 | (when (funcall test (if key (funcall key rr) rr) el) |
9cc077f6 | 143 | (return rr)))) |
849ac835 | 144 | |
b2f9ab3c RS |
145 | (defun clean-buffer-list-delay (name) |
146 | "Return the delay, in seconds, before killing a buffer named NAME. | |
ac06bd0f RS |
147 | Uses `clean-buffer-list-kill-buffer-names', `clean-buffer-list-kill-regexps' |
148 | `clean-buffer-list-delay-general' and `clean-buffer-list-delay-special'. | |
149 | Autokilling is done by `clean-buffer-list'." | |
b2f9ab3c | 150 | (or (assoc-default name clean-buffer-list-kill-buffer-names 'string= |
849ac835 | 151 | clean-buffer-list-delay-special) |
b2f9ab3c | 152 | (assoc-default name clean-buffer-list-kill-regexps 'string-match |
849ac835 RS |
153 | clean-buffer-list-delay-special) |
154 | (* clean-buffer-list-delay-general 24 60 60))) | |
ac06bd0f | 155 | |
80252f73 | 156 | ;;;###autoload |
ac06bd0f | 157 | (defun clean-buffer-list () |
b2f9ab3c | 158 | "Kill old buffers that have not been displayed recently. |
9cc077f6 | 159 | The relevant variables are `clean-buffer-list-delay-general', |
ac06bd0f RS |
160 | `clean-buffer-list-delay-special', `clean-buffer-list-kill-buffer-names', |
161 | `clean-buffer-list-kill-never-buffer-names', | |
9cc077f6 RS |
162 | `clean-buffer-list-kill-regexps' and |
163 | `clean-buffer-list-kill-never-regexps'. | |
164 | While processing buffers, this procedure displays messages containing | |
165 | the current date/time, buffer name, how many seconds ago it was | |
82f08756 RS |
166 | displayed (can be nil if the buffer was never displayed) and its |
167 | lifetime, i.e., its \"age\" when it will be purged." | |
ac06bd0f | 168 | (interactive) |
a1f84f6d | 169 | (let ((tm (float-time)) bts (ts (format-time-string "%Y-%m-%d %T")) |
c60168d2 EZ |
170 | delay cbld bn) |
171 | (dolist (buf (buffer-list)) | |
172 | (when (buffer-live-p buf) | |
173 | (setq bts (midnight-buffer-display-time buf) bn (buffer-name buf) | |
174 | delay (if bts (- tm bts) 0) cbld (clean-buffer-list-delay bn)) | |
175 | (message "[%s] `%s' [%s %d]" ts bn (if bts (round delay)) cbld) | |
176 | (unless (or (midnight-find bn clean-buffer-list-kill-never-regexps | |
177 | 'string-match) | |
178 | (midnight-find bn clean-buffer-list-kill-never-buffer-names | |
179 | 'string-equal) | |
180 | (get-buffer-process buf) | |
181 | (and (buffer-file-name buf) (buffer-modified-p buf)) | |
182 | (get-buffer-window buf 'visible) (< delay cbld)) | |
183 | (message "[%s] killing `%s'" ts bn) | |
184 | (kill-buffer buf)))))) | |
ac06bd0f RS |
185 | |
186 | ;;; midnight hook | |
187 | ||
188 | (defvar midnight-period (* 24 60 60) | |
b2f9ab3c | 189 | "The number of seconds in a day--the delta for `midnight-timer'.") |
ac06bd0f | 190 | |
82f08756 | 191 | (defcustom midnight-hook '(clean-buffer-list) |
ac06bd0f RS |
192 | "The hook run `midnight-delay' seconds after midnight every day. |
193 | The default value is `clean-buffer-list'." | |
194 | :type 'hook | |
1e484d64 | 195 | :group 'midnight) |
ac06bd0f RS |
196 | |
197 | (defun midnight-next () | |
198 | "Return the number of seconds till the next midnight." | |
a764697e | 199 | (multiple-value-bind (sec min hrs) |
f5fbd9ad | 200 | (values-list (decode-time)) |
ac06bd0f RS |
201 | (- (* 24 60 60) (* 60 60 hrs) (* 60 min) sec))) |
202 | ||
ac06bd0f RS |
203 | ;;;###autoload |
204 | (defun midnight-delay-set (symb tm) | |
205 | "Modify `midnight-timer' according to `midnight-delay'. | |
9cc077f6 RS |
206 | Sets the first argument SYMB (which must be symbol `midnight-delay') |
207 | to its second argument TM." | |
208 | (assert (eq symb 'midnight-delay) t | |
320cb80d | 209 | "Invalid argument to `midnight-delay-set': `%s'") |
ac06bd0f RS |
210 | (set symb tm) |
211 | (when (timerp midnight-timer) (cancel-timer midnight-timer)) | |
212 | (setq midnight-timer | |
213 | (run-at-time (if (numberp tm) (+ (midnight-next) tm) tm) | |
cef7e1da | 214 | midnight-period 'run-hooks 'midnight-hook))) |
ac06bd0f RS |
215 | |
216 | (defcustom midnight-delay 3600 | |
9201cc28 | 217 | "The number of seconds after the midnight when the `midnight-timer' is run. |
ac06bd0f RS |
218 | You should set this variable before loading midnight.el, or |
219 | set it by calling `midnight-delay-set', or use `custom'. | |
220 | If you wish, you can use a string instead, it will be passed as the | |
221 | first argument to `run-at-time'." | |
222 | :type 'sexp | |
223 | :set 'midnight-delay-set | |
1e484d64 | 224 | :group 'midnight) |
ac06bd0f RS |
225 | |
226 | (provide 'midnight) | |
227 | ||
228 | ;;; midnight.el ends here |