From mboxrd@z Thu Jan  1 00:00:00 1970
From: James Harkins <jamshark70@gmail.com>
Subject: Re: Conditional source-block execution based on LaTeX document
 class?
Date: Mon, 27 Jan 2014 10:30:30 +0800
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To: Eric Schulte <schulte.eric@gmail.com>
Cc: orgmode <emacs-orgmode@gnu.org>

On Monday, January 27, 2014 1:35:13 AM HKT, Eric Schulte wrote:
> Hi James,
>
> Maybe you could do something like the following...
>
> #+name: export-hdr-arg-backend-dep
> #+begin_src emacs-lisp
> (message "do stuff")
> #+end_src
>
> #+call: export-hdr-arg-backend-dep() :exports (if (eq=20
> org-export-current-backend 'beamer) "none" "results")

Ah... that's really cool. I hadn't realized you could run lisp in the=20
header arguments.

I couldn't check the current export backend because the org markup uses=20
beamer-specific features. The way to export the article format is to use=20
the beamer backend, but with document class =3D article and a=20
"\usepackage{beamerarticle}" line in the preamble.

But, I figured out a little hack: to put this at the top of the container=20
file:

# ###### top of slide container
#+name: set-slide-flag
#+begin_src emacs-lisp :exports results :results value latex
(setq hjh-exporting-slides 't)
""
#+end_src

# ###### top of article container
#+name: set-slide-flag
#+begin_src emacs-lisp :exports results :results value latex
(setq hjh-exporting-slides nil)
""
#+end_src

Then I can test this variable in all of the #+calls.

It seems to be working. When I export from the slide container file, it=20
runs each #+call once. When I export from the article container (where I=20
have the calls in the container), it runs the calls for the article=20
container but it does *not* execute the calls redundantly for the two slide=20=

show source files I have now.

Thanks for the tip -- that's working a treat!

I think I owe it to the org community to write up this workflow, after the=20=

project is over. The help from Nicolas, you and others has been invaluable.

hjh