Re: Customize buttons that change user's customfileshouldaskforconfirmation

[Luc Teirlinck]

       M-: (setq custom-file "X")
       M-x customize
       do some editing
       save (into X)
       M-: (setq custom-file "Y")
       get (from ?)

       Question is "from X" or "from Y"?

   Good point. I would think it should be Y.

Absolutely not. `(setq custom-file "Y")' means that you want Custom to
_write_ to Y.  If you want Y to be read you have to load Y.

By the way, loading a file with a second custom-set-variables form is
not something Custom currently expects you to do.  It will work fine
and can be useful, _if_ you know what you are doing.  Some packages
use several files with separate `custom-set-variables' forms.
But, if you do not know Custom really well, unexpected things may happen.

If you want Y to be your Custom file, write:

(setq custom-file "Y")
(load custom-file)

in your .emacs, as the docstring of `custom-file' recommends.

Sincerely,

Luc.