Conditional source-block execution based on LaTeX document class?

[James Harkins <jamshark70@gmail.com>]

Just ran into something that I'm really not sure how to handle. I thought I 
could handle it with export filters, but actually it involves babel, and 
that makes it more involved than I initially suspected.

I'm working on a large project involving five beamer presentations (one per 
day), and the sources for these will be combined into one massive 
beamerarticle document for the workshop attendees' reference. (If they want 
to print it out, it will look okay, but I won't encourage the killing of 
trees -- actually my early versions of the article layout looks fine on a 
tablet.)

I'm using LaTeX's glossaries package for indexed references at the end. 
But, \newglossaryentry is really annoying. So I made some org tables for 
the glossary entries and I wrote some emacs-lisp src blocks to convert them 
into the right syntax for LaTeX. So here's the problem...

In the individual beamer slideshows, I need to put the \newglossaryentry 
commands within a frame (because I'm also using beamer's 
"ignorenonframetext" class option, so that I can have text that appears 
only in the article but not the slides). That is (if I have H:3):

*** Some frame
**** A block
     Some text

#+call: makegloss
#+results: makegloss

... then the results of the src block to go into the frame, and then beamer 
doesn't ignore them and everything works.

For the final article, I need a structure like this:

#+options: H:4

* Day 1
#+include "01-intro/01-contents.org"

* Day 2
#+include "02-synthesis/02-contents.org"

And the problem is, if the #+call commands are replicated in each 
0x-contents file, then I will have redundant \newglossaryentry commands in 
the LaTeX output (in the end, multiplied five times).

If there's no other way, I could live with that, but ideally, I'd like to 
be able to put the #+call lines into the master file for the article, and 
then be able to suppress their execution in the #+includes. Ideally, this 
would be automatic based on the LaTeX document class.

Any way to do this? I suppose, at worst, I can just put all of the #+call 
lines in, and simply say "no" to the ones I don't want in the final 
compilation.

Thanks,
hjh