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Don't remove notify descriptor that is already gone

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* lisp/autorevert.el (auto-revert-use-notify, auto-revert-mode,
global-auto-revert-mode, auto-revert-notify-rm-watch,
auto-revert-notify-add-watch, auto-revert-notify-handler,
auto-revert-notify-rm-watch-callback):
Don't remove a notify descriptor after receiving a `stopped' notification
event, because the descriptor is then already gone and any attempt to
remove it causes a recursive call to `auto-revert-notify-handler'.
This commit is contained in:
Mattias Engdegård 2019-04-10 15:25:53 +02:00
parent ba6ed9a48d
commit e9e807e931
1 changed files with 21 additions and 10 deletions
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31
lisp/autorevert.el
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@ -287,7 +287,7 @@ You should set this variable through Custom."
(dolist (buf (buffer-list))
(with-current-buffer buf
(when (symbol-value 'auto-revert-notify-watch-descriptor)
(auto-revert-notify-rm-watch))))))
(auto-revert-notify-rm-watch t))))))
:initialize 'custom-initialize-default
:version "24.4")
@ -371,7 +371,7 @@ without being changed in the part that is already in the buffer."
'kill-buffer-hook
#'auto-revert-remove-current-buffer
nil t))
(when auto-revert-notify-watch-descriptor (auto-revert-notify-rm-watch))
(when auto-revert-notify-watch-descriptor (auto-revert-notify-rm-watch t))
(auto-revert-remove-current-buffer))
(auto-revert-set-timer)
(when auto-revert-mode
@ -480,7 +480,7 @@ specifies in the mode line."
(dolist (buf (buffer-list))
(with-current-buffer buf
(when auto-revert-notify-watch-descriptor
(auto-revert-notify-rm-watch))))))
(auto-revert-notify-rm-watch t))))))
(defun auto-revert-set-timer ()
"Restart or cancel the timer used by Auto-Revert Mode.
@ -497,8 +497,10 @@ will use an up-to-date value of `auto-revert-interval'"
auto-revert-interval
'auto-revert-buffers))))
(defun auto-revert-notify-rm-watch ()
"Disable file notification for current buffer's associated file."
(defun auto-revert-notify-rm-watch (remove-descriptor)
"Disable file notification for current buffer's associated file.
If REMOVE-DESCRIPTOR is non-nil, remove the corresponding notification
descriptor; otherwise assume that it has already been removed."
(when auto-revert-notify-watch-descriptor
(maphash
(lambda (key value)
@ -507,13 +509,19 @@ will use an up-to-date value of `auto-revert-interval'"
(if value
(puthash key value auto-revert-notify-watch-descriptor-hash-list)
(remhash key auto-revert-notify-watch-descriptor-hash-list)
(ignore-errors
(file-notify-rm-watch auto-revert-notify-watch-descriptor)))))
(when remove-descriptor
(ignore-errors
(file-notify-rm-watch auto-revert-notify-watch-descriptor))))))
auto-revert-notify-watch-descriptor-hash-list)
(remove-hook 'kill-buffer-hook #'auto-revert-notify-rm-watch t))
(remove-hook 'kill-buffer-hook #'auto-revert-notify-rm-watch-callback t))
(setq auto-revert-notify-watch-descriptor nil
auto-revert-notify-modified-p nil))
(defun auto-revert-notify-rm-watch-callback ()
"Disable file notification for current buffer's associated file,
and remove the notification descriptor."
(auto-revert-notify-rm-watch t))
(defun auto-revert-notify-add-watch ()
"Enable file notification for current buffer's associated file."
;; We can assume that `auto-revert-notify-watch-descriptor' is nil.
@ -553,7 +561,8 @@ will use an up-to-date value of `auto-revert-interval'"
(gethash auto-revert-notify-watch-descriptor
auto-revert-notify-watch-descriptor-hash-list))
auto-revert-notify-watch-descriptor-hash-list)
(add-hook 'kill-buffer-hook #'auto-revert-notify-rm-watch nil t)))))
(add-hook 'kill-buffer-hook #'auto-revert-notify-rm-watch-callback
nil t)))))
;; If we have file notifications, we want to update the auto-revert buffers
;; immediately when a notification occurs. Since file updates can happen very
@ -609,7 +618,9 @@ no more reverts are possible until the next call of
(file-name-nondirectory buffer-file-name)))
;; A buffer w/o a file, like dired.
(null buffer-file-name)))
(auto-revert-notify-rm-watch))))
;; Since we got a `stopped' event, the notification descriptor
;; is already gone; don't try to remove it.
(auto-revert-notify-rm-watch nil))))
;; Loop over all buffers, in order to find the intended one.
(cl-dolist (buffer buffers)