[O] Actual value of variable in tangled source file instead of variable

[Rainer M Krug]

Hi

I am using R for package writing in R, and the org file is under svn version control. 

I would like to keep the version of the R package, as stated in the DESCRIPTION file, in sync with the svn revision, so I thought about using variables for that.

But my approach below obviosly does not work, as in the tangled DESCRIPTION file, it says Version: 0.$VER

Is it possible to have, during tangling, the actual value in the source file instead of the variable? 

Thanks,

Rainer

* The DESCRIPTION File

 #+begin_src sh :tangle ./asm/DESCRIPTION :shebang :padline no :var VER=(vc-working-revision (buffer-file-name))

  Package: asm

  Type: Package

  Title: Alien spread management simulation model

  Version: 0.$VER

  Date: 2011-06-08

  Author: Rainer M. Krug

  Maintainer: Rainer M Krug <address@hidden>

  Description: For research

  License: GPL-3

  LazyLoad: yes

  Depends: simecol, sp, maptools, spgrass6, RSQLite, Rcpp (>= 0.9.4)

  LinkingTo: Rcpp

  

 #+end_src

-- 
Rainer M. Krug, PhD (Conservation Ecology, SUN), MSc (Conservation Biology, UCT), Dipl. Phys. (Germany)

Centre of Excellence for Invasion Biology
Stellenbosch University
South Africa

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