bug#44202: [PATCH] Add variable to control confirmation of help-mode-revert-buffer

[Kevin Foley <kevin@kevinjfoley.me>]

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Lars Ingebrigtsen <larsi@gnus.org> writes:

>> +(defcustom help-mode-revert-buffer-noconfirm nil
>
> In general, I think "negative" variables should be avoided, because
> doing the "not not" logic confuses people.  So I'd rather have
> `help-mode-revert-buffer-confirm' (defaulting to t).

I was trying to match the noconfirm argument of the revert function but
I agree, `help-mode-revert-buffer-confirm' is less confusing.

I've attached an updated patch.

Kevin Foley


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From 9d5c29fc084d13837a5e8fb27f3948953b923605 Mon Sep 17 00:00:00 2001
From: "Kevin J. Foley" <kevin@kevinjfoley.me>
Date: Sat, 24 Oct 2020 16:14:31 -0400
Subject: [PATCH] Add option to disable confirmation prompt when reverting help
 buffer

    * lisp/help-mode.el (help-mode-revert-buffer-confirm):
    (help-mode-revert-buffer): Add variable and reference it in revert
    function.
---
 lisp/help-mode.el | 12 +++++++++++-
 1 file changed, 11 insertions(+), 1 deletion(-)

diff --git a/lisp/help-mode.el b/lisp/help-mode.el
index 0dc6c9ffae..716924f312 100644
--- a/lisp/help-mode.el
+++ b/lisp/help-mode.el
@@ -98,6 +98,12 @@ The format is (FUNCTION ARGS...).")
   "Hook run by `help-mode'."
   :type 'hook
   :group 'help)
+
+(defcustom help-mode-revert-buffer-confirm t
+  "Non-nil means prompt for confirmation when reverting a help buffer."
+  :type 'boolean
+  :group 'help
+  :version "28.1")
 \f
 ;; Button types used by help
 
@@ -757,7 +763,11 @@ Show all docs for that symbol as either a variable, function or face."
       (user-error "No symbol here"))))
 
 (defun help-mode-revert-buffer (_ignore-auto noconfirm)
-  (when (or noconfirm (yes-or-no-p "Revert help buffer? "))
+  "Revert help-mode buffer.
+See `help-mode-revert-buffer-confirm' to control confirmation prompt."
+  (when (or noconfirm
+            (not help-mode-revert-buffer-confirm)
+            (yes-or-no-p "Revert help buffer? "))
     (let ((pos (point))
 	  (item help-xref-stack-item)
 	  ;; Pretend there is no current item to add to the history.
-- 
2.28.0