:group 'gnus-newsrc
:type 'hook)
+(defcustom gnus-save-newsrc-file-check-timestamp nil
+ "Check the modification time of the newsrc.eld file before saving it.
+When the newsrc.eld file is updated by multiple machines,
+checking the file's modification time is a good way to avoid
+overwriting updated data."
+ :group 'gnus-newsrc
+ :type 'boolean)
+
(defcustom gnus-save-newsrc-hook nil
"A hook called before saving any of the newsrc files."
:group 'gnus-newsrc
'msdos-long-file-names
(lambda () t))))
+(defvar gnus-save-newsrc-file-last-timestamp nil)
(defun gnus-save-newsrc-file (&optional force)
"Save .newsrc file."
;; Note: We cannot save .newsrc file if all newsgroups are removed
(erase-buffer)
(gnus-message 5 "Saving %s.eld..." gnus-current-startup-file)
+ ;; check timestamp of `gnus-current-startup-file'.eld against
+ ;; `gnus-save-newsrc-file-last-timestamp'
+ (when gnus-save-newsrc-file-check-timestamp
+ (let* ((checkfile (concat gnus-current-startup-file ".eld"))
+ (mtime (nth 5 (file-attributes checkfile))))
+ (when (and gnus-save-newsrc-file-last-timestamp
+ (time-less-p gnus-save-newsrc-file-last-timestamp
+ mtime))
+ (unless (y-or-n-p
+ (format "%s was updated externally after %s, save?"
+ checkfile
+ (format-time-string
+ "%c"
+ gnus-save-newsrc-file-last-timestamp)))
+ (error "Couldn't save %s: updated externally" checkfile)))))
+
(if gnus-save-startup-file-via-temp-buffer
(let ((coding-system-for-write gnus-ding-file-coding-system)
(standard-output (current-buffer)))
(gnus-gnus-to-quick-newsrc-format)
(gnus-run-hooks 'gnus-save-quick-newsrc-hook)
- (save-buffer))
+ (save-buffer)
+ (setq gnus-save-newsrc-file-last-timestamp
+ (nth 5 (file-attributes buffer-file-name))))
(let ((coding-system-for-write gnus-ding-file-coding-system)
(version-control gnus-backup-startup-file)
(startup-file (concat gnus-current-startup-file ".eld"))
;; Replace the existing startup file with the temp file.
(rename-file working-file startup-file t)
- (gnus-set-file-modes startup-file setmodes)))
+ (gnus-set-file-modes startup-file setmodes)
+ (setq gnus-save-newsrc-file-last-timestamp
+ (nth 5 (file-attributes startup-file)))))
(condition-case nil
(delete-file working-file)
(file-error nil)))))