GNU bug report logs - #29443
Document how to set themes depending on a condition

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Message #5 received at submit <at> debbugs.gnu.org (full text, mbox):

From: 積丹尼 Dan Jacobson <jidanni <at> jidanni.org>
To: bug-gnu-emacs <at> gnu.org
Subject: Document how to set themes depending on a condition
Date: Sun, 26 Nov 2017 01:40:16 +0800

In (info "(emacs) Custom Themes") after

    Setting or saving Custom themes actually works by customizing the
    variable ‘custom-enabled-themes’.  The value of this variable is a list
    of Custom theme names (as Lisp symbols, e.g., ‘tango’).  Instead of
    using the ‘*Custom Themes*’ buffer to set ‘custom-enabled-themes’, you
    can customize the variable using the usual customization interface,
    e.g., with ‘M-x customize-option’.

please add:

    Here's how to set a theme depending on a condition:

    (custom-set-variables
     ;; custom-set-variables was added by Custom.
     ;; If you edit it by hand, you could mess it up, so be careful.
     ;; Your init file should contain only one such instance.
     ;; If there is more than one, they won't work right.
     (if(/= 0(user-uid)) '(custom-enabled-themes (quote (wheatgrass)))))

    In the above we have added a condition to what Custom has put into the
    customization file we found on our disk.

    We set the wheatgrass theme if we are not root.

    One could go further and set different themes for different seasons. The
    sky's the limit!

Message #8 received at 29443 <at> debbugs.gnu.org (full text, mbox):

From: charles <at> aurox.ch (Charles A. Roelli)
To: 積丹尼 Dan Jacobson <jidanni <at> jidanni.org>
Cc: 29443 <at> debbugs.gnu.org
Subject: Re: bug#29443: Document how to set themes depending on a condition
Date: Sun, 26 Nov 2017 14:44:26 +0100

It's an interesting idea, but if you later try to customize your
enabled theme further, you will lose the handwritten condition.  Maybe
Customize could be improved to support this use case.

Message #11 received at 29443 <at> debbugs.gnu.org (full text, mbox):

From: Lars Ingebrigtsen <larsi <at> gnus.org>
To: charles <at> aurox.ch (Charles A. Roelli)
Cc: 29443 <at> debbugs.gnu.org,
 積丹尼 Dan Jacobson <jidanni <at> jidanni.org>
Subject: Re: bug#29443: Document how to set themes depending on a condition
Date: Sat, 12 Oct 2019 22:59:13 +0200

charles <at> aurox.ch (Charles A. Roelli) writes:

> It's an interesting idea, but if you later try to customize your
> enabled theme further, you will lose the handwritten condition.

Yes, so I don't think we want to document anything along the lines
suggested.

> Maybe Customize could be improved to support this use case.

I think that's beyond the scope of Customize, so I'm closing this bug
report.

-- 
(domestic pets only, the antidote for overdose, milk.)
   bloggy blog: http://lars.ingebrigtsen.no

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