From mboxrd@z Thu Jan  1 00:00:00 1970
From: Stig Brautaset <stig@brautaset.org>
Subject: eval code snippet before tangling config file
Date: Wed, 11 May 2016 13:34:27 +0100
Message-ID: <m2bn4cydrg.fsf@brautaset.org>
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 ([2001:4830:134:3::10]:45292)
	by lists.gnu.org with esmtp (Exim 4.71)
	(envelope-from <geo-emacs-orgmode@m.gmane.org>) id 1b0TPB-0002gM-49
	for emacs-orgmode@gnu.org; Wed, 11 May 2016 08:38:22 -0400
Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71)
	(envelope-from <geo-emacs-orgmode@m.gmane.org>) id 1b0TP5-0005z2-RG
	for emacs-orgmode@gnu.org; Wed, 11 May 2016 08:38:19 -0400
Received: from plane.gmane.org ([80.91.229.3]:53590)
	by eggs.gnu.org with esmtp (Exim 4.71)
	(envelope-from <geo-emacs-orgmode@m.gmane.org>) id 1b0TP5-0005yA-Gz
	for emacs-orgmode@gnu.org; Wed, 11 May 2016 08:38:15 -0400
Received: from list by plane.gmane.org with local (Exim 4.69)
	(envelope-from <geo-emacs-orgmode@m.gmane.org>) id 1b0TP3-0006Pj-SK
	for emacs-orgmode@gnu.org; Wed, 11 May 2016 14:38:14 +0200
Received: from 185.59.181.102 ([185.59.181.102])
	by main.gmane.org with esmtp (Gmexim 0.1 (Debian))
	id 1AlnuQ-0007hv-00
	for <emacs-orgmode@gnu.org>; Wed, 11 May 2016 14:38:13 +0200
Received: from stig by 185.59.181.102 with local (Gmexim 0.1 (Debian))
	id 1AlnuQ-0007hv-00
	for <emacs-orgmode@gnu.org>; Wed, 11 May 2016 14:38:13 +0200
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"
	<emacs-orgmode-bounces+geo-emacs-orgmode=m.gmane.org@gnu.org>
To: emacs-orgmode@gnu.org


Hi,

I'm trying to evaluate a line of shell code and put its output into a
snippet that will be tangled to a file. My best attempt so far:

  #+NAME: hostname
  #+BEGIN_SRC sh
    hostname -s
  #+END_SRC

  #+BEGIN_SRC conf :tangle /usr/local/etc/leafnode/config :noweb tangle
    expire = 20
    server = news.gmane.org
    initialfetch = 100
    hostname = <<hostname>>.superloopy.io
  #+END_SRC

However the result of that tangle includes the shell snippet in
verbatim: 

  #+RESULTS:
  : expire = 20
  : server = news.gmane.org
  : initialfetch = 100
  : hostname = hostname -s.superloopy.io

I suspect this is because it will be executed in the context of "conf"
mode, which does not really have an execution mode. Syntax highlighting
etc works fine, however. I could change to make a shell script to write
the config, but it's not as nice really.

PS: this is an improvement to my existing setup of Leafnode on OS X, if
anybody's interested:
http://github.com/stig/dot-files/tree/master/Leafnode.org

Stig