GNU bug report logs - #63891
29.0.91; customize-save-variable should not save all variables if a custom file exists

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From: Eli Zaretskii <eliz <at> gnu.org>
To: Jimmy Wong <wyuenho <at> gmail.com>
Cc: 63891 <at> debbugs.gnu.org
Subject: bug#63891: 29.0.91; customize-save-variable should not save all variables if a custom file exists
Date: Sun, 04 Jun 2023 16:23:56 +0300

> Date: Sun, 4 Jun 2023 14:02:55 +0100
> From: Jimmy Wong <wyuenho <at> gmail.com>
> Cc: 63891 <at> debbugs.gnu.org
> 
> Yes sorry, I mean customize-save-variable, custom-save-variable doesn’t exist. There’s a branch in
> customize-save-variable that saves all previously updated variables to the custom file if it exists.

I don't think I understand.  customize-save-variable saves only a
single variable: the one whose name you type, with the value you type.
Which branch there does more, and how can you invoke that branch?

> I just took a look at cus-edit.el, there appears to be no function that can surgically serialize just one
> variable value to the custom file.

customize-save-variable is that function.

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