From mboxrd@z Thu Jan  1 00:00:00 1970
From: "Eric Schulte" <schulte.eric@gmail.com>
Subject: Re: [BABEL] "unset" :var definitions for subtree
Date: Wed, 09 Feb 2011 18:27:38 -0700
Message-ID: <87bp2koeir.fsf@gmail.com>
References: <4D500BEC.1080300@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 [140.186.70.92] (port=50443 helo=eggs.gnu.org)
	by lists.gnu.org with esmtp (Exim 4.43) id 1PnLUD-0000pC-03
	for emacs-orgmode@gnu.org; Wed, 09 Feb 2011 20:38:21 -0500
Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71)
	(envelope-from <schulte.eric@gmail.com>) id 1PnLU9-0008Ku-3z
	for emacs-orgmode@gnu.org; Wed, 09 Feb 2011 20:38:18 -0500
Received: from mail-gx0-f169.google.com ([209.85.161.169]:55353)
	by eggs.gnu.org with esmtp (Exim 4.71)
	(envelope-from <schulte.eric@gmail.com>) id 1PnLU8-0008Kp-V4
	for emacs-orgmode@gnu.org; Wed, 09 Feb 2011 20:38:17 -0500
Received: by gxk5 with SMTP id 5so400406gxk.0
	for <emacs-orgmode@gnu.org>; Wed, 09 Feb 2011 17:38:16 -0800 (PST)
List-Id: "General discussions about Org-mode." <emacs-orgmode.gnu.org>
List-Unsubscribe: <http://lists.gnu.org/mailman/listinfo/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: <http://lists.gnu.org/mailman/listinfo/emacs-orgmode>,
	<mailto:emacs-orgmode-request@gnu.org?subject=subscribe>
Sender: emacs-orgmode-bounces+geo-emacs-orgmode=m.gmane.org@gnu.org
Errors-To: emacs-orgmode-bounces+geo-emacs-orgmode=m.gmane.org@gnu.org
To: Rainer M Krug <r.m.krug@gmail.com>
Cc: emacs-orgmode <emacs-orgmode@gnu.org>

Rainer M Krug <r.m.krug@gmail.com> writes:

> Hi
>
> For one project, I am usinr org to write submit scripte to a cluster
> runing torqu. The important bit in this is, that between the shebang and
> the code, no other executable line must occur. As I am using variables
> in org (:var) they will occur just after the shebang, which causes a
> problem for torque. So, my question is, is there a way to "unset"
> variables defined by using :var for a subtree?
>

Hi Rainer,

Interesting question... unfortunately I don't think that removing
variables from header arguments is possible under the current setup.

Perhaps in your case you could add a function to the post-tangle hook,
which recognizes when it is being called in a just-tangled torqu script
(maybe by searching for a series of #PBS lines), and then removes any
lines between the shebang and the first #PBS line?

More generally, I wonder what a natural method would be to allow
unsetting of pre-set header arguments for local blocks or subtrees?
This may only apply to the :var header argument, as most others have a
default setting which can be actively set.  If you have any ideas for a
natural syntax for such an operation I'd be happy to hear it.

Cheers -- Eric

>
> #+BABEL: :session *R* :results output :exports both :tangle
> Analysis_sensitivity.R :var RESULTSDIR="/media/Results/" :var
> ANALYSISDIR="~/Documents/Projects/analysis/"
>
>
> * submit script (SA.sub)
> :PROPERTIES:
> :tangle:   ./SA.sub
> :exports: code
> :END:
> #+begin_src sh
>   #PBS -j y
>   #PBS -M Rainer@krugs.de
>   #PBS -V
>   #PBS -l nodes=1:mem=4gb
>   ##
>   cd $PBS_O_WORKDIR
> #+end_src
>
> I would need the tangled code to be :
>
> #!/bin/bash
> #PBS -j y
> #PBS -M Rainer@krugs.de
> #PBS -V
> #PBS -l nodes=1:mem=4gb
> ##
> cd $PBS_O_WORKDIR
>
> But it is
>
> #!/bin/bash
> RESULTSDIR=/media/Results/
> ANALYSISDIR=~/Documents/Projects/analysis/
> #PBS -j y
> #PBS -M Rainer@krugs.de
> #PBS -V
> #PBS -l nodes=1:mem=4gb
> ##
> cd $PBS_O_WORKDIR
>
>
> But RESULTSDIR and ANALYSISDIR is used in the remainder of the document
> (several other subtrees)
>
> Any help appreciated,
>
> Rainer