lisp/autorevert.el

   1 ;;; autorevert.el --- revert buffers when files on disk change
   2
   3 ;; Copyright (C) 1997, 1998, 1999, 2001, 2002, 2003, 2004,
   4 ;;   2005, 2006, 2007, 2008, 2009, 2010 Free Software Foundation, Inc.
   5
   6 ;; Author: Anders Lindgren <andersl@andersl.com>
   7 ;; Keywords: convenience
   8 ;; Created: 1997-06-01
   9 ;; Date: 1999-11-30
  10
  11 ;; This file is part of GNU Emacs.
  12
  13 ;; GNU Emacs is free software: you can redistribute it and/or modify
  14 ;; it under the terms of the GNU General Public License as published by
  15 ;; the Free Software Foundation, either version 3 of the License, or
  16 ;; (at your option) any later version.
  17
  18 ;; GNU Emacs is distributed in the hope that it will be useful,
  19 ;; but WITHOUT ANY WARRANTY; without even the implied warranty of
  20 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  21 ;; GNU General Public License for more details.
  22
  23 ;; You should have received a copy of the GNU General Public License
  24 ;; along with GNU Emacs.  If not, see <http://www.gnu.org/licenses/>.
  25
  26 ;;; Commentary:
  27
  28 ;; Introduction:
  29 ;;
  30 ;; Whenever a file that Emacs is editing has been changed by another
  31 ;; program the user normally has to execute the command `revert-buffer'
  32 ;; to load the new content of the file into Emacs.
  33 ;;
  34 ;; This package contains two minor modes: Global Auto-Revert Mode and
  35 ;; Auto-Revert Mode.  Both modes automatically revert buffers
  36 ;; whenever the corresponding files have been changed on disk and the
  37 ;; buffer contains no unsaved changes.
  38 ;;
  39 ;; Auto-Revert Mode can be activated for individual buffers.  Global
  40 ;; Auto-Revert Mode applies to all file buffers. (If the user option
  41 ;; `global-auto-revert-non-file-buffers' is non-nil, it also applies
  42 ;; to some non-file buffers.  This option is disabled by default.)
  43 ;; Since checking a remote file is too slow, these modes do not check
  44 ;; or revert remote files.
  45 ;;
  46 ;; Both modes operate by checking the time stamp of all files at
  47 ;; intervals of `auto-revert-interval'.  The default is every five
  48 ;; seconds.  The check is aborted whenever the user actually uses
  49 ;; Emacs.  You should never even notice that this package is active
  50 ;; (except that your buffers will be reverted, of course).
  51 ;;
  52 ;; After reverting a file buffer, Auto Revert Mode normally puts point
  53 ;; at the same position that a regular manual revert would.  However,
  54 ;; there is one exception to this rule.  If point is at the end of the
  55 ;; buffer before reverting, it stays at the end.  Similarly if point
  56 ;; is displayed at the end of a file buffer in any window, it will stay
  57 ;; at the end of the buffer in that window, even if the window is not
  58 ;; selected.  This way, you can use Auto Revert Mode to `tail' a file.
  59 ;; Just put point at the end of the buffer and it will stay there.
  60 ;; These rules apply to file buffers. For non-file buffers, the
  61 ;; behavior may be mode dependent.
  62 ;;
  63 ;; While you can use Auto Revert Mode to tail a file, this package
  64 ;; contains a third minor mode, Auto Revert Tail Mode, which does so
  65 ;; more efficiently, as long as you are sure that the file will only
  66 ;; change by growing at the end.  It only appends the new output,
  67 ;; instead of reverting the entire buffer.  It does so even if the
  68 ;; buffer contains unsaved changes.  (Because they will not be lost.)
  69 ;; Auto Revert Tail Mode works also for remote files.
  70
  71 ;; Usage:
  72 ;;
  73 ;; Go to the appropriate buffer and press either of:
  74 ;;   M-x auto-revert-mode RET
  75 ;;   M-x auto-revert-tail-mode RET
  76 ;;
  77 ;; To activate Global Auto-Revert Mode, press:
  78 ;;   M-x global-auto-revert-mode RET
  79 ;;
  80 ;; To activate Global Auto-Revert Mode every time Emacs is started
  81 ;; customise the option `global-auto-revert-mode' or the following
  82 ;; line could be added to your ~/.emacs:
  83 ;;   (global-auto-revert-mode 1)
  84 ;;
  85 ;; The function `turn-on-auto-revert-mode' could be added to any major
  86 ;; mode hook to activate Auto-Revert Mode for all buffers in that
  87 ;; mode.  For example, the following line will activate Auto-Revert
  88 ;; Mode in all C mode buffers:
  89 ;;
  90 ;; (add-hook 'c-mode-hook 'turn-on-auto-revert-mode)
  91
  92 ;;; Code:
  93
  94 ;; Dependencies:
  95
  96 (require 'timer)
  97
  98 (eval-when-compile (require 'cl))
  99
 100
 101 ;; Custom Group:
 102 ;;
 103 ;; The two modes will be placed next to Auto Save Mode under the
 104 ;; Files group under Emacs.
 105
 106 (defgroup auto-revert nil
 107   "Revert individual buffers when files on disk change.
 108
 109 Auto-Revert Mode can be activated for individual buffer.
 110 Global Auto-Revert Mode applies to all buffers."
 111   :group 'files
 112   :group 'convenience)
 113
 114
 115 ;; Variables:
 116
 117 ;;; What's this?: ;; Autoload for the benefit of `make-mode-line-mouse-sensitive'.
 118 ;;; What's this?: ;;;###autoload
 119 (defvar auto-revert-mode nil
 120   "*Non-nil when Auto-Revert Mode is active.
 121 Never set this variable directly, use the command `auto-revert-mode' instead.")
 122 (put 'auto-revert-mode 'permanent-local t)
 123
 124 (defvar auto-revert-tail-mode nil
 125   "*Non-nil when Auto-Revert Tail Mode is active.
 126 Never set this variable directly, use the command
 127 `auto-revert-tail-mode' instead.")
 128 (put 'auto-revert-tail-mode 'permanent-local t)
 129
 130 (defvar auto-revert-timer nil
 131   "Timer used by Auto-Revert Mode.")
 132
 133 (defcustom auto-revert-interval 5
 134   "Time, in seconds, between Auto-Revert Mode file checks.
 135 The value may be an integer or floating point number.
 136
 137 If a timer is already active, there are two ways to make sure
 138 that the new value will take effect immediately.  You can set
 139 this variable through Custom or you can call the command
 140 `auto-revert-set-timer' after setting the variable.  Otherwise,
 141 the new value will take effect the first time Auto Revert Mode
 142 calls `auto-revert-set-timer' for internal reasons or in your
 143 next editing session."
 144   :group 'auto-revert
 145   :type 'number
 146   :set (lambda (variable value)
 147          (set-default variable value)
 148          (and (boundp 'auto-revert-timer)
 149               auto-revert-timer
 150               (auto-revert-set-timer))))
 151
 152 (defcustom auto-revert-stop-on-user-input t
 153   "When non-nil, user input temporarily interrupts Auto-Revert Mode.
 154 With this setting, Auto-Revert Mode checks for user input after
 155 handling each buffer and does not process any further buffers
 156 \(until the next run of the timer) if user input is available.
 157 When nil, Auto-Revert Mode checks files and reverts buffers,
 158 with quitting disabled, without paying attention to user input.
 159 Thus, with this setting, Emacs might be non-responsive at times."
 160   :group 'auto-revert
 161   :type 'boolean)
 162
 163 (defcustom auto-revert-verbose t
 164   "When nil, Auto-Revert Mode does not generate any messages.
 165 When non-nil, a message is generated whenever a file is reverted."
 166   :group 'auto-revert
 167   :type 'boolean)
 168
 169 (defcustom auto-revert-mode-text " ARev"
 170   "String to display in the mode line when Auto-Revert Mode is active.
 171
 172 \(When the string is not empty, make sure that it has a leading space.)"
 173   :tag "Auto Revert Mode Text"          ; To separate it from `global-...'
 174   :group 'auto-revert
 175   :type 'string)
 176
 177 (defcustom auto-revert-tail-mode-text " Tail"
 178   "String to display in the mode line when Auto-Revert Tail Mode is active.
 179
 180 \(When the string is not empty, make sure that it has a leading space.)"
 181   :group 'auto-revert
 182   :type 'string
 183   :version "22.1")
 184
 185 (defcustom auto-revert-mode-hook nil
 186   "Functions to run when Auto-Revert Mode is activated."
 187   :tag "Auto Revert Mode Hook"          ; To separate it from `global-...'
 188   :group 'auto-revert
 189   :type 'hook)
 190
 191 (defcustom global-auto-revert-mode-text ""
 192   "String to display when Global Auto-Revert Mode is active.
 193
 194 The default is nothing since when this mode is active this text doesn't
 195 vary over time, or between buffers.  Hence mode line text
 196 would only waste precious space."
 197   :group 'auto-revert
 198   :type 'string)
 199
 200 (defcustom global-auto-revert-mode-hook nil
 201   "Hook called when Global Auto-Revert Mode is activated."
 202   :group 'auto-revert
 203   :type 'hook)
 204
 205 (defcustom global-auto-revert-non-file-buffers nil
 206   "When nil, Global Auto-Revert mode operates only on file-visiting buffers.
 207
 208 When non-nil, both file buffers and buffers with a custom
 209 `revert-buffer-function' and a `buffer-stale-function' are
 210 reverted by Global Auto-Revert mode.  These include the Buffer
 211 List buffer displayed by `buffer-menu', and Dired buffers showing
 212 complete local directories.  The Buffer List buffer reverts every
 213 `auto-revert-interval' seconds; Dired buffers when the file list of
 214 the main directory changes.  Dired buffers do not auto-revert as
 215 a result of changes in subdirectories, or in the contents, size,
 216 modes, etc., of files.  You may still sometimes want to revert
 217 them manually.
 218
 219 Use this option with care since it could lead to excessive auto-reverts.
 220 For more information, see Info node `(emacs)Autorevert'."
 221   :group 'auto-revert
 222   :type 'boolean
 223   :link '(info-link "(emacs)Autorevert"))
 224
 225 (defcustom global-auto-revert-ignore-modes ()
 226   "List of major modes Global Auto-Revert Mode should not check."
 227   :group 'auto-revert
 228   :type '(repeat sexp))
 229
 230 (defcustom auto-revert-load-hook nil
 231   "Functions to run when Auto-Revert Mode is first loaded."
 232   :tag "Load Hook"
 233   :group 'auto-revert
 234   :type 'hook)
 235
 236 (defcustom auto-revert-check-vc-info nil
 237   "If non-nil Auto Revert Mode reliably updates version control info.
 238 Auto Revert Mode updates version control info whenever the buffer
 239 needs reverting, regardless of the value of this variable.
 240 However, the version control state can change without changes to
 241 the work file.  If the change is made from the current Emacs
 242 session, all info is updated.  But if, for instance, a new
 243 version is checked in from outside the current Emacs session, the
 244 version control number in the mode line, as well as other version
 245 control related information, may not be properly updated.  If you
 246 are worried about this, set this variable to a non-nil value.
 247
 248 This currently works by automatically updating the version
 249 control info every `auto-revert-interval' seconds.  Nevertheless,
 250 it should not cause excessive CPU usage on a reasonably fast
 251 machine, if it does not apply to too many version controlled
 252 buffers.  CPU usage depends on the version control system."
 253   :group 'auto-revert
 254   :type 'boolean
 255   :version "22.1")
 256
 257 (defvar global-auto-revert-ignore-buffer nil
 258   "*When non-nil, Global Auto-Revert Mode will not revert this buffer.
 259
 260 This variable becomes buffer local when set in any fashion.")
 261 (make-variable-buffer-local 'global-auto-revert-ignore-buffer)
 262
 263 ;; Internal variables:
 264
 265 (defvar auto-revert-buffer-list ()
 266   "List of buffers in Auto-Revert Mode.
 267
 268 Note that only Auto-Revert Mode, never Global Auto-Revert Mode, adds
 269 buffers to this list.
 270
 271 The timer function `auto-revert-buffers' is responsible for purging
 272 the list of old buffers.")
 273
 274 (defvar auto-revert-remaining-buffers ()
 275   "Buffers not checked when user input stopped execution.")
 276
 277 (defvar auto-revert-tail-pos 0
 278   "Position of last known end of file.")
 279
 280 (add-hook 'find-file-hook
 281           (lambda ()
 282             (set (make-local-variable 'auto-revert-tail-pos)
 283                  (nth 7 (file-attributes buffer-file-name)))))
 284
 285 ;; Functions:
 286
 287 ;;;###autoload
 288 (define-minor-mode auto-revert-mode
 289   "Toggle reverting buffer when file on disk changes.
 290
 291 With arg, turn Auto Revert mode on if and only if arg is positive.
 292 This is a minor mode that affects only the current buffer.
 293 Use `global-auto-revert-mode' to automatically revert all buffers.
 294 Use `auto-revert-tail-mode' if you know that the file will only grow
 295 without being changed in the part that is already in the buffer."
 296   :group 'auto-revert :lighter auto-revert-mode-text
 297   (if auto-revert-mode
 298       (if (not (memq (current-buffer) auto-revert-buffer-list))
 299           (push (current-buffer) auto-revert-buffer-list))
 300     (setq auto-revert-buffer-list
 301           (delq (current-buffer) auto-revert-buffer-list)))
 302   (auto-revert-set-timer)
 303   (when auto-revert-mode
 304     (auto-revert-buffers)
 305     (setq auto-revert-tail-mode nil)))
 306
 307
 308 ;;;###autoload
 309 (defun turn-on-auto-revert-mode ()
 310   "Turn on Auto-Revert Mode.
 311
 312 This function is designed to be added to hooks, for example:
 313   (add-hook 'c-mode-hook 'turn-on-auto-revert-mode)"
 314   (auto-revert-mode 1))
 315
 316
 317 ;;;###autoload
 318 (define-minor-mode auto-revert-tail-mode
 319   "Toggle reverting tail of buffer when file on disk grows.
 320 With arg, turn Tail mode on if arg is positive, otherwise turn it off.
 321
 322 When Tail mode is enabled, the tail of the file is constantly
 323 followed, as with the shell command `tail -f'.  This means that
 324 whenever the file grows on disk (presumably because some
 325 background process is appending to it from time to time), this is
 326 reflected in the current buffer.
 327
 328 You can edit the buffer and turn this mode off and on again as
 329 you please.  But make sure the background process has stopped
 330 writing before you save the file!
 331
 332 Use `auto-revert-mode' for changes other than appends!"
 333   :group 'find-file :lighter auto-revert-tail-mode-text
 334   (when auto-revert-tail-mode
 335     (unless buffer-file-name
 336       (auto-revert-tail-mode 0)
 337       (error "This buffer is not visiting a file"))
 338     (if (and (buffer-modified-p)
 339              (zerop auto-revert-tail-pos) ; library was loaded only after finding file
 340              (not (y-or-n-p "Buffer is modified, so tail offset may be wrong.  Proceed? ")))
 341         (auto-revert-tail-mode 0)
 342       ;; a-r-tail-pos stores the size of the file at the time of the
 343       ;; last revert. After this package loads, it adds a
 344       ;; find-file-hook to set this variable every time a file is
 345       ;; loaded.  If the package is loaded only _after_ visiting the
 346       ;; file to be reverted, then we have no idea what the value of
 347       ;; a-r-tail-pos should have been when the file was visited.  If
 348       ;; the file has changed on disk in the meantime, all we can do
 349       ;; is offer to revert the whole thing. If you choose not to
 350       ;; revert, then you might miss some output then happened
 351       ;; between visiting the file and activating a-r-t-mode.
 352       (and (zerop auto-revert-tail-pos)
 353            (not (verify-visited-file-modtime (current-buffer)))
 354            (y-or-n-p "File changed on disk, content may be missing.  \
 355 Perform a full revert? ")
 356            ;; Use this (not just revert-buffer) for point-preservation.
 357            (auto-revert-handler))
 358       ;; else we might reappend our own end when we save
 359       (add-hook 'before-save-hook (lambda () (auto-revert-tail-mode 0)) nil t)
 360       (or (local-variable-p 'auto-revert-tail-pos) ; don't lose prior position
 361           (set (make-local-variable 'auto-revert-tail-pos)
 362                (nth 7 (file-attributes buffer-file-name))))
 363       ;; let auto-revert-mode set up the mechanism for us if it isn't already
 364       (or auto-revert-mode
 365           (let ((auto-revert-tail-mode t))
 366             (auto-revert-mode 1)))
 367       (setq auto-revert-mode nil))))
 368
 369
 370 ;;;###autoload
 371 (defun turn-on-auto-revert-tail-mode ()
 372   "Turn on Auto-Revert Tail Mode.
 373
 374 This function is designed to be added to hooks, for example:
 375   (add-hook 'my-logfile-mode-hook 'turn-on-auto-revert-tail-mode)"
 376   (auto-revert-tail-mode 1))
 377
 378
 379 ;;;###autoload
 380 (define-minor-mode global-auto-revert-mode
 381   "Toggle Global Auto Revert mode.
 382 With optional prefix argument ARG, enable Global Auto Revert Mode
 383 if ARG > 0, else disable it.
 384
 385 This is a global minor mode that reverts any buffer associated
 386 with a file when the file changes on disk.  Use `auto-revert-mode'
 387 to revert a particular buffer.
 388
 389 If `global-auto-revert-non-file-buffers' is non-nil, this mode
 390 may also revert some non-file buffers, as described in the
 391 documentation of that variable.  It ignores buffers with modes
 392 matching `global-auto-revert-ignore-modes', and buffers with a
 393 non-nil vale of `global-auto-revert-ignore-buffer'.
 394
 395 This function calls the hook `global-auto-revert-mode-hook'.
 396 It displays the text that `global-auto-revert-mode-text'
 397 specifies in the mode line."
 398   :global t :group 'auto-revert :lighter global-auto-revert-mode-text
 399   (auto-revert-set-timer)
 400   (when global-auto-revert-mode
 401     (auto-revert-buffers)))
 402
 403
 404 (defun auto-revert-set-timer ()
 405   "Restart or cancel the timer used by Auto-Revert Mode.
 406 If such a timer is active, cancel it.  Start a new timer if
 407 Global Auto-Revert Mode is active or if Auto-Revert Mode is active
 408 in some buffer.  Restarting the timer ensures that Auto-Revert Mode
 409 will use an up-to-date value of `auto-revert-interval'"
 410   (interactive)
 411   (if (timerp auto-revert-timer)
 412       (cancel-timer auto-revert-timer))
 413   (setq auto-revert-timer
 414         (if (or global-auto-revert-mode auto-revert-buffer-list)
 415             (run-with-timer auto-revert-interval
 416                             auto-revert-interval
 417                             'auto-revert-buffers))))
 418
 419 (defun auto-revert-active-p ()
 420   "Check if auto-revert is active (in current buffer or globally)."
 421   (or auto-revert-mode
 422       auto-revert-tail-mode
 423       (and
 424        global-auto-revert-mode
 425        (not global-auto-revert-ignore-buffer)
 426        (not (memq major-mode
 427                   global-auto-revert-ignore-modes)))))
 428
 429 (defun auto-revert-handler ()
 430   "Revert current buffer, if appropriate.
 431 This is an internal function used by Auto-Revert Mode."
 432   (when (or auto-revert-tail-mode (not (buffer-modified-p)))
 433     (let* ((buffer (current-buffer)) size
 434            (revert
 435             (or (and buffer-file-name
 436                      (file-readable-p buffer-file-name)
 437                      (if auto-revert-tail-mode
 438                          ;; Tramp caches the file attributes.  Setting
 439                          ;; `tramp-cache-inhibit' forces Tramp to
 440                          ;; reread the values.
 441                          (let ((tramp-cache-inhibit-cache t))
 442                            (/= auto-revert-tail-pos
 443                                (setq size
 444                                      (nth 7 (file-attributes
 445                                              buffer-file-name)))))
 446                        (and (not (file-remote-p buffer-file-name))
 447                             (not (verify-visited-file-modtime buffer)))))
 448                 (and (or auto-revert-mode
 449                          global-auto-revert-non-file-buffers)
 450                      revert-buffer-function
 451                      (boundp 'buffer-stale-function)
 452                      (functionp buffer-stale-function)
 453                      (funcall buffer-stale-function t))))
 454            eob eoblist)
 455       (when revert
 456         (when (and auto-revert-verbose
 457                    (not (eq revert 'fast)))
 458           (message "Reverting buffer `%s'." (buffer-name)))
 459         ;; If point (or a window point) is at the end of the buffer,
 460         ;; we want to keep it at the end after reverting.  This allows
 461         ;; to tail a file.
 462         (when buffer-file-name
 463           (setq eob (eobp))
 464           (walk-windows
 465            #'(lambda (window)
 466                (and (eq (window-buffer window) buffer)
 467                     (= (window-point window) (point-max))
 468                     (push window eoblist)))
 469            'no-mini t))
 470         (if auto-revert-tail-mode
 471             (auto-revert-tail-handler size)
 472           ;; Bind buffer-read-only in case user has done C-x C-q,
 473           ;; so as not to forget that.  This gives undesirable results
 474           ;; when the file's mode changes, but that is less common.
 475           (let ((buffer-read-only buffer-read-only))
 476             (revert-buffer 'ignore-auto 'dont-ask 'preserve-modes)))
 477         (when buffer-file-name
 478           (when eob (goto-char (point-max)))
 479           (dolist (window eoblist)
 480             (set-window-point window (point-max)))))
 481       ;; `preserve-modes' avoids changing the (minor) modes.  But we
 482       ;; do want to reset the mode for VC, so we do it manually.
 483       (when (or revert auto-revert-check-vc-info)
 484         (vc-find-file-hook)))))
 485
 486 (defun auto-revert-tail-handler (size)
 487   (let ((modified (buffer-modified-p))
 488         (inhibit-read-only t)           ; Ignore.
 489         (file buffer-file-name)
 490         (buffer-file-name nil))         ; Ignore that file has changed.
 491     (when (/= auto-revert-tail-pos size)
 492       (run-hooks 'before-revert-hook)
 493       (undo-boundary)
 494       (save-restriction
 495         (widen)
 496         (save-excursion
 497           (goto-char (point-max))
 498           (insert-file-contents file nil
 499                                 (and (< auto-revert-tail-pos size)
 500                                      auto-revert-tail-pos)
 501                                 size)))
 502       (run-hooks 'after-revert-hook)
 503       (undo-boundary)
 504       (setq auto-revert-tail-pos size)
 505       (restore-buffer-modified-p modified)))
 506   (set-visited-file-modtime))
 507
 508 (defun auto-revert-buffers ()
 509   "Revert buffers as specified by Auto-Revert and Global Auto-Revert Mode.
 510
 511 Should `global-auto-revert-mode' be active all file buffers are checked.
 512
 513 Should `auto-revert-mode' be active in some buffers, those buffers
 514 are checked.
 515
 516 Non-file buffers that have a custom `revert-buffer-function' and
 517 a `buffer-stale-function' are reverted either when Auto-Revert
 518 Mode is active in that buffer, or when the variable
 519 `global-auto-revert-non-file-buffers' is non-nil and Global
 520 Auto-Revert Mode is active.
 521
 522 This function stops whenever there is user input.  The buffers not
 523 checked are stored in the variable `auto-revert-remaining-buffers'.
 524
 525 To avoid starvation, the buffers in `auto-revert-remaining-buffers'
 526 are checked first the next time this function is called.
 527
 528 This function is also responsible for removing buffers no longer in
 529 Auto-Revert mode from `auto-revert-buffer-list', and for canceling
 530 the timer when no buffers need to be checked."
 531   (save-match-data
 532     (let ((bufs (if global-auto-revert-mode
 533                     (buffer-list)
 534                   auto-revert-buffer-list))
 535           (remaining ())
 536           (new ()))
 537       ;; Partition `bufs' into two halves depending on whether or not
 538       ;; the buffers are in `auto-revert-remaining-buffers'.  The two
 539       ;; halves are then re-joined with the "remaining" buffers at the
 540       ;; head of the list.
 541       (dolist (buf auto-revert-remaining-buffers)
 542         (if (memq buf bufs)
 543             (push buf remaining)))
 544       (dolist (buf bufs)
 545         (if (not (memq buf remaining))
 546             (push buf new)))
 547       (setq bufs (nreverse (nconc new remaining)))
 548       (while (and bufs
 549                   (not (and auto-revert-stop-on-user-input
 550                             (input-pending-p))))
 551         (let ((buf (car bufs)))
 552           (if (buffer-live-p buf)
 553               (with-current-buffer buf
 554                 ;; Test if someone has turned off Auto-Revert Mode in a
 555                 ;; non-standard way, for example by changing major mode.
 556                 (if (and (not auto-revert-mode)
 557                          (not auto-revert-tail-mode)
 558                          (memq buf auto-revert-buffer-list))
 559                     (setq auto-revert-buffer-list
 560                           (delq buf auto-revert-buffer-list)))
 561                 (when (auto-revert-active-p) (auto-revert-handler)))
 562             ;; Remove dead buffer from `auto-revert-buffer-list'.
 563             (setq auto-revert-buffer-list
 564                   (delq buf auto-revert-buffer-list))))
 565         (setq bufs (cdr bufs)))
 566       (setq auto-revert-remaining-buffers bufs)
 567       ;; Check if we should cancel the timer.
 568       (when (and (not global-auto-revert-mode)
 569                  (null auto-revert-buffer-list))
 570         (cancel-timer auto-revert-timer)
 571         (setq auto-revert-timer nil)))))
 572
 573
 574 ;; The end:
 575 (provide 'autorevert)
 576
 577 (run-hooks 'auto-revert-load-hook)
 578
 579 ;; arch-tag: f6bcb07b-4841-477e-9e44-b18678e58876
 580 ;;; autorevert.el ends here