From mboxrd@z Thu Jan  1 00:00:00 1970
From: Jambunathan K <kjambunathan@gmail.com>
Subject: Re: new exporter, conditional options according to backend
Date: Sun, 20 Jan 2013 11:05:06 +0530
Message-ID: <874nic8lit.fsf@gmail.com>
References: <87hame8pdk.fsf@david.espiga4.com.ar> <87sj5w23ia.fsf@gmail.com>
Mime-Version: 1.0
Content-Type: text/plain
Return-path: <emacs-orgmode-bounces+geo-emacs-orgmode=m.gmane.org@gnu.org>
Received: from eggs.gnu.org ([208.118.235.92]:37968)
	by lists.gnu.org with esmtp (Exim 4.71)
	(envelope-from <kjambunathan@gmail.com>) id 1TwnYx-00042N-M0
	for emacs-orgmode@gnu.org; Sun, 20 Jan 2013 00:35:24 -0500
Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71)
	(envelope-from <kjambunathan@gmail.com>) id 1TwnYw-0007qw-MB
	for emacs-orgmode@gnu.org; Sun, 20 Jan 2013 00:35:23 -0500
Received: from mail-da0-f51.google.com ([209.85.210.51]:47529)
	by eggs.gnu.org with esmtp (Exim 4.71)
	(envelope-from <kjambunathan@gmail.com>) id 1TwnYw-0007qs-Fu
	for emacs-orgmode@gnu.org; Sun, 20 Jan 2013 00:35:22 -0500
Received: by mail-da0-f51.google.com with SMTP id i30so2216287dad.24
	for <emacs-orgmode@gnu.org>; Sat, 19 Jan 2013 21:35:21 -0800 (PST)
In-Reply-To: <87sj5w23ia.fsf@gmail.com> (Nicolas Goaziou's message of "Sat, 19
	Jan 2013 23:48:29 +0100")
List-Id: "General discussions about Org-mode." <emacs-orgmode.gnu.org>
List-Unsubscribe: <https://lists.gnu.org/mailman/options/emacs-orgmode>,
	<mailto:emacs-orgmode-request@gnu.org?subject=unsubscribe>
List-Archive: <http://lists.gnu.org/archive/html/emacs-orgmode>
List-Post: <mailto:emacs-orgmode@gnu.org>
List-Help: <mailto:emacs-orgmode-request@gnu.org?subject=help>
List-Subscribe: <https://lists.gnu.org/mailman/listinfo/emacs-orgmode>,
	<mailto:emacs-orgmode-request@gnu.org?subject=subscribe>
Errors-To: emacs-orgmode-bounces+geo-emacs-orgmode=m.gmane.org@gnu.org
Sender: emacs-orgmode-bounces+geo-emacs-orgmode=m.gmane.org@gnu.org
To: Nicolas Goaziou <n.goaziou@gmail.com>
Cc: Ezequiel Birman <stormwatch@espiga4.com.ar>, emacs-orgmode@gnu.org

Nicolas Goaziou <n.goaziou@gmail.com> writes:

> #+begin_src emacs-lisp
> (defun my-options-change-fun (tree backend info)
>   (when (org-export-derived-backend-p backend 'e-beamer)
>     (plist-put info :with-author nil))
>   ;; Don't forget to return tree.
>   tree)

CAVEAT: plist-put can return a different list, at times.

I don't know enough about implementation of `plist-put' to ascertain
when it would return a new list.

> (add-to-list 'org-export-filter-parse-tree-functions
>              'my-options-change-fun)

--