GNU bug report logs - #18189
customized value of 'vc-annotate-background-mode' is applied only after restarting Emacs

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Message #25 received at 18189-done <at> debbugs.gnu.org (full text, mbox):

From: Juri Linkov <juri <at> jurta.org>
To: Glenn Morris <rgm <at> gnu.org>
Cc: Stefan Monnier <monnier <at> iro.umontreal.ca>, 18189-done <at> debbugs.gnu.org,
 Paul Pogonyshev <pogonyshev <at> gmail.com>
Subject: Re: bug#18189: customized value of 'vc-annotate-background-mode' is
 applied only after restarting Emacs
Date: Sun, 10 Aug 2014 02:57:43 +0300

>> `vc-annotate-background-mode' is defined before `vc-annotate-color-map'
>> in the source file vc-annotate.el, so there is a cyclic dependency
>> in these variables.  When I tried to provide it directly in the `defcustom'
>
> Usually that's a sign you need an :initialize as well as a :set, and/or
> a :set-after.

I don't see how :initialize and :set-after could be used
to update the value of the dependent variable, and can't find
a suitable example in the source code, so I just added a check
for (boundp 'vc-annotate-color-map).

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