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bug#14591: New keyword :local for defcustom

From: Juanma Barranquero
Subject: bug#14591: New keyword :local for defcustom
Date: Fri, 14 Jun 2013 15:06:06 +0200

> No.

Well, there are only two defcustom permanent-locals which are not
automatically buffer-local, and I wouldn't be surprised to discover
that they should, in fact, be. In any case, it's a corner case not
worth catering to.

=== modified file 'lisp/custom.el'
--- lisp/custom.el 2013-01-02 16:13:04 +0000
+++ lisp/custom.el 2013-06-14 12:10:30 +0000
@@ -173,6 +173,11 @@
  (put symbol 'risky-local-variable value))
  ((eq keyword :safe)
  (put symbol 'safe-local-variable value))
+                ((eq keyword :local)
+                 (when (memq value '(t permanent))
+                   (make-variable-buffer-local symbol))
+                 (when (eq value 'permanent)
+                   (put symbol 'permanent-local t)))
  ((eq keyword :type)
  (put symbol 'custom-type (purecopy value)))
  ((eq keyword :options)
@@ -246,6 +251,9 @@
 :risky Set SYMBOL's `risky-local-variable' property to VALUE.
 :safe Set SYMBOL's `safe-local-variable' property to VALUE.
         See Info node `(elisp) File Local Variables'.
+:local  If VALUE is t, mark SYMBOL as automatically buffer-local.
+        If VALUE is `permanent', also set SYMBOL's `permanent-local'
+        property to t.

 The following common keywords are also meaningful.

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