Re: [babel] noweb for :sessions?

From: "Eric Schulte" <schulte.eric@gmail.com>
To: "Thomas S. Dye" <tsd@tsdye.com>
Cc: emacs-orgmode@gnu.org
Subject: Re: [babel] noweb for :sessions?
Date: Mon, 19 Oct 2009 12:15:24 -0600	[thread overview]
Message-ID: <m2zl7nb683.fsf@gmail.com> (raw)
In-Reply-To: CC57D69C-4CC1-4957-AC20-CB84E2039FA0@tsdye.com

Hi Tom,

That is an interesting proposal, and surprisingly simple to implement.
Please pull the latest version of Org-mode, and you will find that there
is now a :noweb header argument available for source-code blocks which
has the effect of expanding noweb references before source-block
evaluation (as you suggested below).  So for example the following
works.

--8<---------------cut here---------------start------------->8---
#+srcname: noweb-example
#+begin_src ruby 
  a = 28
#+end_src

#+begin_src ruby :noweb
  # <<noweb-example>>
  a + 4
#+end_src

#+resname:
: 32
--8<---------------cut here---------------end--------------->8---

Does this satisfy the behavior you were suggesting?

Thanks for the idea! -- Eric

"Thomas S. Dye" <tsd@tsdye.com> writes:

> Aloha all,
>
> Is it possible to define frequently used code snippets in a generic way so they can be used in different
> sessions?
>
> Something like this is what I have in mind:
>
> #+srcname: r-connect
> #+begin_src R :exports none :session any
> library(rMySQL)
> con <- dbConnect(MySQL(), user="user_name", password="password", 
>                      dbname="db_name", host="host_name")
> #+end_src
>
> #+srcname: r-query
> #+begin_src R :session session-1 
> # <<r-connect>>
> res <- dbGetQuery(con, "select * from table_name where 1")
> #+end_src
>
> Tom
>
> Thomas S. Dye, Ph.D.
>
> T. S. Dye & Colleagues, Archaeologists, Inc.
>
> Phone: (808) 529-0866 Fax: (808) 529-0884
>
> http://www.tsdye.com
>
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