bug#69079: [PATCH] Add 'customize-toggle-option' command

[Philip Kaludercic <philipk@posteo.net>]

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I have had this option in my own init.el for a while, and think it would
be nice to upstream it.  Any comments:


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From 65cbe5deb81bd5b3bc7ebcc52a98952497dbe1a6 Mon Sep 17 00:00:00 2001
From: Philip Kaludercic <philipk@posteo.net>
Date: Mon, 12 Feb 2024 18:29:50 +0100
Subject: [PATCH] Add 'custom-variable' command.

* lisp/cus-edit.el (customize-toggle-option): Add command.
(toggle-option): Add shorter alias for 'customize-toggle-option'.
* etc/NEWS: Document it.
---
 etc/NEWS         |  4 ++++
 lisp/cus-edit.el | 20 ++++++++++++++++++++
 2 files changed, 24 insertions(+)

diff --git a/etc/NEWS b/etc/NEWS
index afc2c22e68b..6fae64728f2 100644
--- a/etc/NEWS
+++ b/etc/NEWS
@@ -1329,6 +1329,10 @@ in Buffer menu mode.
 *** New command 'customize-dirlocals'.
 This command pops up a buffer to edit the settings in ".dir-locals.el".
 
+---
+** New command 'customize-toggle-option'.
+This command can toggle boolean options for the duration of a session.
+
 ** Calc
 
 +++
diff --git a/lisp/cus-edit.el b/lisp/cus-edit.el
index 38b6ec984ab..2f08ffc8ba6 100644
--- a/lisp/cus-edit.el
+++ b/lisp/cus-edit.el
@@ -1227,6 +1227,26 @@ customize-option
     (unless (eq symbol basevar)
       (message "`%s' is an alias for `%s'" symbol basevar))))
 
+;;;###autoload
+(defun customize-toggle-option (opt)
+  "Toggle the value of boolean option OPT for this session."
+  (interactive (let (opts)
+		 (mapatoms
+		  (lambda (sym)
+		    (when (eq (get sym 'custom-type) 'boolean)
+		      (push sym opts))))
+		 (list (intern (completing-read "Option: " opts)))))
+  (message "%s user options '%s'."
+	   (if (funcall (or (get opt 'custom-set) #'set-default)
+			opt (not (funcall (or (get opt 'custom-get)
+					      #'symbol-value)
+					  opt)))
+	       "Enabled" "Disabled")
+	   opt))
+
+;;;###autoload
+(defalias 'toggle-option #'customize-toggle-option)
+
 ;;;###autoload
 (defalias 'customize-variable-other-window 'customize-option-other-window)
 
-- 
2.43.0