(rmail-confirm-expunge): New user-option.

(rmail-expunge): Ask for confirmation depending on the setting
of rmail-confirm-expunge.

diff --git a/lisp/mail/rmail.el b/lisp/mail/rmail.el
index 1586f37b000cc82833c2fb5cc27ea318f8eb748f..1aab4a4b4b21212c020374614aa2b81fbf460a0e 100644 (file)
--- a/lisp/mail/rmail.el
+++ b/lisp/mail/rmail.el
@@ -218,6 +218,15 @@ and the value of the environment variable MAIL overrides it)."
   :type 'regexp
   :group 'rmail-files)
 
+;;;###autoload
+(defcustom rmail-confirm-expunge 'yes-or-no-p
+  "*Whether and how to ask for confirmation before expunging deleted messages."
+  :type '(choice (const :tag "No confirmation" nil)
+                (const :tag "Confirm with y-or-n-p" y-or-n-p)
+                (const :tag "Confirm with yes-or-no-p" yes-or-no-p))
+  :version "21.1"
+  :group 'rmail-files)
+
 ;;;###autoload
 (defvar rmail-mode-hook nil
   "List of functions to call when Rmail is invoked.")
@@ -2674,10 +2683,13 @@ Deleted messages stay in the file until the \\[rmail-expunge] command is given."
 (defun rmail-expunge ()
   "Erase deleted messages from Rmail file and summary buffer."
   (interactive)
-  (rmail-only-expunge)
-  (if (rmail-summary-exists)
-      (rmail-select-summary
-       (rmail-update-summary))))
+  (when (or (null rmail-confirm-expunge)
+           (funcall rmail-confirm-expunge
+                    "Erase deleted messages from Rmail file? "))
+    (rmail-only-expunge)
+    (if (rmail-summary-exists)
+       (rmail-select-summary
+        (rmail-update-summary)))))
 \f
 ;;;; *** Rmail Mailing Commands ***