From mboxrd@z Thu Jan  1 00:00:00 1970
X-Msuck: nntp://news.gmane.io/gmane.emacs.gnus.general/50637
Path: main.gmane.org!not-for-mail
From: Per Abrahamsen <abraham@dina.kvl.dk>
Newsgroups: gmane.emacs.gnus.general
Subject: Re: convert from setq to customization
Date: Fri, 07 Mar 2003 10:02:55 +0100
Organization: The Church of Emacs
Sender: owner-ding@hpc.uh.edu
Message-ID: <rjllzrczwg.fsf__39382.2275604636$1047027801@zuse.dina.kvl.dk>
References: <86u1em4wdn.fsf@red.stonehenge.com> <rjheaidjoa.fsf@zuse.dina.kvl.dk>
 <4nadg9fsw2.fsf@lockgroove.bwh.harvard.edu>
 <rju1ehc501.fsf@zuse.dina.kvl.dk>
 <4nof4o2xc1.fsf@lockgroove.bwh.harvard.edu>
NNTP-Posting-Host: main.gmane.org
Mime-Version: 1.0
Content-Type: text/plain; charset=us-ascii
X-Trace: main.gmane.org 1047027801 13952 80.91.224.249 (7 Mar 2003 09:03:21 GMT)
X-Complaints-To: usenet@main.gmane.org
NNTP-Posting-Date: Fri, 7 Mar 2003 09:03:21 +0000 (UTC)
Cc: emacs-custom@sunsite.dk
Original-X-From: owner-ding@hpc.uh.edu Fri Mar 07 10:03:20 2003
Return-path: <owner-ding@hpc.uh.edu>
Original-Received: from malifon.math.uh.edu ([129.7.128.13])
	by main.gmane.org with esmtp (Exim 3.35 #1 (Debian))
	id 18rDl9-0003cu-00
	for <ding-account@gmane.org>; Fri, 07 Mar 2003 10:03:19 +0100
Original-Received: from sina.hpc.uh.edu ([129.7.128.10] ident=lists)
	by malifon.math.uh.edu with esmtp (Exim 3.20 #1)
	id 18rDl5-0007uz-00; Fri, 07 Mar 2003 03:03:15 -0600
Original-Received: by sina.hpc.uh.edu (TLB v0.09a (1.20 tibbs 1996/10/09 22:03:07)); Fri, 07 Mar 2003 03:04:14 -0600 (CST)
Original-Received: from main.gmane.org (main.gmane.org [80.91.224.249])
	by sina.hpc.uh.edu (8.9.3/8.9.3) with ESMTP id DAA08753
	for <ding@hpc.uh.edu>; Fri, 7 Mar 2003 03:04:01 -0600 (CST)
Original-Received: from list by main.gmane.org with local (Exim 3.35 #1 (Debian))
	id 18rDkF-0003a6-00
	for <ding@hpc.uh.edu>; Fri, 07 Mar 2003 10:02:23 +0100
Mail-Followup-To: ding@hpc.uh.edu
X-Injected-Via-Gmane: http://gmane.org/
Original-To: ding@hpc.uh.edu
Original-Received: from news by main.gmane.org with local (Exim 3.35 #1 (Debian))
	id 18rDkE-0003Zv-00
	for <gmane-emacs-gnus-general@m.gmane.org>; Fri, 07 Mar 2003 10:02:22 +0100
Original-Lines: 27
Original-X-Complaints-To: usenet@main.gmane.org
X-Face: +kRV2]2q}lixHkE{U)mY#+6]{AH=yN~S9@IFiOa@X6?GM<U{B+4e{k79.Ya{~':DblFPCg$
 @60,BfLv2@SKZ19cMWK0/C'v;tM:|6B'R}U1rp6CL&kN({9<zF/V{:JCg27yC)9oZjeqcQawzKfiNL
 t9}`vjmK["dRQC/qGFQq"%u|Q`:6{"Rz}b(dnl_"3$Jtqimi>|8MBp/
Mail-Copies-To: nobody
User-Agent: Gnus/5.090007 (Oort Gnus v0.07) Emacs/21.1
 (sparc-sun-solaris2.8)
Cancel-Lock: sha1:nXOy6dGbF+u8t0fN+JRkrqIhDmc=
Precedence: list
X-Majordomo: 1.94.jlt7
Xref: main.gmane.org gmane.emacs.gnus.general:50637
X-Report-Spam: http://spam.gmane.org/gmane.emacs.gnus.general:50637

Ted Zlatanov <tzz@lifelogs.com> writes:

> On Thu, 06 Mar 2003, abraham@dina.kvl.dk wrote:
>> User options, i.e. anything declared by defcustom or defface, should
>> only be modified the user, either by setq's in .emacs or
>> interactivly through customize.
>> 
>> If it is done by other Lisp packages, they risk conflicting with the
>> users choices.
>
> What if package A has variable A1, which needs to be overridden by
> package B because of variable B1?

Split the variable in two, A1-user and A1-default the first being
defcustom (for the user) and the second defvar (for other packages),
with the first taking precedence over the second if changed .

> For example, spam.el requires nnimap-split-download-body in nnimap.el
> to be set if a statistical filter is selected, so the whole message
> body is downloaded.

If ann option explicitly set by the user prevent another package from
running, that package should give an error, not overwrite the EXPLICIT
user choice.

Defaults is another case, covered by my suggestion above.