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bug#18189: customized value of 'vc-annotate-background-mode' is applied

From: Juri Linkov
Subject: bug#18189: customized value of 'vc-annotate-background-mode' is applied only after restarting Emacs
Date: Tue, 05 Aug 2014 03:11:05 +0300
User-agent: Gnus/5.13 (Gnus v5.13) Emacs/24.3.50 (x86_64-pc-linux-gnu)

> To reproduce:
> - customize the variable and toggle its value;
> - observe that annotation buffers still look the same, even if you generate
> them anew;
> - new variable value is only honored if you restart Emacs.
> Ideally the value should be apply on-the-fly. But at least it should be
> applied if I hit 'C-x v g' after customizing the variable.

I believe this should be implemented by this patch:

=== modified file 'lisp/vc/vc-annotate.el'
--- lisp/vc/vc-annotate.el      2014-07-08 08:49:18 +0000
+++ lisp/vc/vc-annotate.el      2014-08-05 00:07:51 +0000
@@ -139,6 +139,12 @@ (defcustom vc-annotate-color-map
   :type 'alist
   :group 'vc)
+(put 'vc-annotate-background-mode 'custom-set
+     (lambda (symbol value)
+       (set-default symbol value)
+       (ignore-errors
+        (custom-reevaluate-setting 'vc-annotate-color-map))))
 (defcustom vc-annotate-very-old-color (if vc-annotate-background-mode 
"#CCCCFF" "#3F3FFF")
   "Color for lines older than the current color range in \\[vc-annotate]."
   :type 'string

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