Abort Gnus exit if we have unsaved Message buffers

* lisp/gnus/gnus-group.el
(gnus--abort-on-unsaved-message-buffers): New function (bug#28843).
(gnus-group-exit): Use it to abort exit if we have unsaved Message
buffers.

1 files changed, 15 insertions, 0 deletions

diff --git a/lisp/gnus/gnus-group.el b/lisp/gnus/gnus-group.el
index b4f482b60a8..1a3646800e9 100644
--- a/lisp/gnus/gnus-group.el
+++ b/lisp/gnus/gnus-group.el
@@ -4371,6 +4371,9 @@ The hook `gnus-exit-gnus-hook' is called before actually exiting."
           gnus-expert-user
           (gnus-y-or-n-p "Are you sure you want to quit reading news? "))
     (gnus-run-hooks 'gnus-exit-gnus-hook)
+    ;; Check whether we have any unsaved Message buffers and offer to
+    ;; save them.
+    (gnus--abort-on-unsaved-message-buffers)
     ;; Offer to save data from non-quitted summary buffers.
     (gnus-offer-save-summaries)
     ;; Save the newsrc file(s).
@@ -4382,6 +4385,18 @@ The hook `gnus-exit-gnus-hook' is called before actually exiting."
     ;; Allow the user to do things after cleaning up.
     (gnus-run-hooks 'gnus-after-exiting-gnus-hook)))
 
+(defun gnus--abort-on-unsaved-message-buffers ()
+  (dolist (buffer (gnus-buffers))
+    (when (gnus-buffer-exists-p buffer)
+      (with-current-buffer buffer
+        (when (and (derived-mode-p 'message-mode)
+                   (buffer-modified-p)
+                   (not (y-or-n-p
+                         (format "Message buffer %s unsaved, continue exit? "
+                                 (buffer-name)))))
+          (error "Gnus exit aborted due to unsaved %s buffer"
+                 (buffer-name)))))))
+
 (defun gnus-group-quit ()
   "Quit reading news without updating .newsrc.eld or .newsrc.
 The hook `gnus-exit-gnus-hook' is called before actually exiting."