From: Rainer M Krug <r.m.krug@gmail.com>
To: Eric Schulte <schulte.eric@gmail.com>
Cc: emacs-orgmode <emacs-orgmode@gnu.org>
Subject: Re: [babel] Conditional tangling possible
Date: Tue, 31 Aug 2010 10:19:04 +0200 [thread overview]
Message-ID: <4C7CBAF8.6050405@gmail.com> (raw)
In-Reply-To: <87fwxv7iib.fsf@gmail.com>
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On 31/08/10 02:06, Eric Schulte wrote:
> Hi Rainer,
>
> The easiest way to do this should be,
>
> --8<---------------cut here---------------start------------->8---
> ** pulling information from tags :blue:
>
> #+begin_src R :var color=(car (org-get-tags-at (point))) :tangle example.R
> color
> #+end_src
OK - that looks good. That solves one problem.
But it is not actually conditional tangling? It is rather the transation
of a tag into a variable - or am I seeing something wrong?
I must admit I have chosen a bad example. The idea is really to have two
completely different definitions of a function, which is then tangled
depending on a tag (or property or whatever else I could use to make
this easy).
so:
- -8<---------------cut here---------------start------------->8---
** Here is the conditional tangle :SIM1
#+begin_src R :TANGLE_ONLY_IF__IN_TAGs SIM1 :tangle example.R
simulate <- function() {
# do something
result <- 15
return(result)
}
#+end_src
#+begin_src R :TANGLE_ONLY_IF__IN_TAGs SIM2 :tangle example.R
simulate <- function() {
# do something else
result <- -88
return(result)
}
#+end_src
- --8<---------------cut here---------------end--------------->8---
So if SIM1 is in the tags, tangle the first block, if SIM2 is in tags
then tangle the second block.
As I said, I do not have to use tags, properties would also work.
Cheers,
Rainer
>
> #+results:
> : blue
> --8<---------------cut here---------------end--------------->8---
>
> this will tangle to
>
> --8<---------------cut here---------------start------------->8---
> color <- "blue"
> color
> --8<---------------cut here---------------end--------------->8---
>
> Cheers -- Eric
>
> Rainer M Krug <r.m.krug@gmail.com> writes:
>
>> Hi
>>
>> I would like to have two different versions (not in the sense of version
>> control) of one program in one org file, and depending on the value if a
>> tag is set or not, tangle either the one or the other. The tangled file
>> has to have the same name.
>>
>> So essentially:
>>
>>
>>
>> ** Test Code :VERSIONTAG
>> Version 1:
>> #+begin_src R :tangle result.R
>> version <- 1
>> x <- 10
>> #+end_src
>>
>> Version 2:
>> #+begin_src R :tangle result.R
>> version <- 2
>> x <- 13
>> #+end_src
>>
>> If VERSIONTAG is Version1, result.R should contain the code as in the
>> first code block, and if it is Version2, the code from the second code
>> block.
>>
>>
>> Is this possible?
>>
>> Cheers,
>>
>> Rainer
- --
Rainer M. Krug, PhD (Conservation Ecology, SUN), MSc (Conservation
Biology, UCT), Dipl. Phys. (Germany)
Centre of Excellence for Invasion Biology
Natural Sciences Building
Office Suite 2039
Stellenbosch University
Main Campus, Merriman Avenue
Stellenbosch
South Africa
Tel: +33 - (0)9 53 10 27 44
Cell: +27 - (0)8 39 47 90 42
Fax (SA): +27 - (0)8 65 16 27 82
Fax (D) : +49 - (0)3 21 21 25 22 44
Fax (FR): +33 - (0)9 58 10 27 44
email: Rainer@krugs.de
Skype: RMkrug
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next prev parent reply other threads:[~2010-08-31 8:19 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-08-30 11:42 [babel] Conditional tangling possible Rainer M Krug
2010-08-31 0:06 ` Eric Schulte
2010-08-31 8:19 ` Rainer M Krug [this message]
2010-08-31 16:19 ` Eric Schulte
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