Re: [Orgmode] [babel] Error with source block and variable on export - bug?

[Rainer M Krug]

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On 03/09/10 19:51, Eric S Fraga wrote:
> On Fri, 03 Sep 2010 09:05:24 -0600, "Eric Schulte" <address@hidden> wrote:
>>
>> Rainer M Krug <address@hidden> writes:
>>
>>> On 03/09/10 16:32, Rainer M Krug wrote:
>>>> On 03/09/10 15:40, Eric Schulte wrote:
>>>>> Hi Rainer,
>>>>
>>>>> As part of the export process Org-mode copies the contents of the
>>>>> Org-mode file to a temporary buffer in which the business of exportation
>>>>> is performed.  This temporary buffer is not associated with any file so
>>>>> (buffer-file-name) returns nil, which is causing the problem you are
>>>>> experiencing.  I think the best solution would be to replace the call to
>>>>> (buffer-file-name) with the actual name of the file, e.g.
>>>>
>>>>> #+begin_src sh :var file=(vc-working-revision 
>>>>> "~/src/babel-dev/scraps.org") :exports results
>>>>>   echo $file Revision
>>>>> #+end_src
>>>>
>>>> Hi Eric
>>>>
>>>> thanks a lot for the clarification - that makes perfect sense. I will do
>>>> as suggested.
>>>
>>> Thanks - it is working now.
>>> But it is a little bit awkward to have the file name (incl. path)
>>> somewhere in the document - can create some problems when renaming the
>>> file or saving it somewhere else).
>>> Is it possible to define it as a kind of variable (property?) in the
>>> headers of the file and reference it in the org file later?
>>>
>>
>> Oh,
>>
>> I've just remembered that during export Org-mode saves this file-name
>> information in the temporary variable `org-current-export-file'.
>>
>> So the following will work, even though it relies upon undocumented
>> internals of Org-mode which could change at some point.
>>
>> #+begin_src sh :var file=(vc-working-revision (or (buffer-file-name) 
>> org-current-export-file)) :exports results
>>   echo $file Revision
>> #+end_src
>>
>> Cheers -- Eric
> 
> And this works very well with an inline src snippet (tested with git
> and RCS).  Very nice!

Thanks a lot Eric F. - that inline syntax was also something I was
looking for - I'll put it into my document on Monday morning.

Cheers,

Rainer

> 
> ,----
> | * revision control
> |   The version of this file is 
> |    src_emacs-lisp{(vc-working-revision (or (buffer-file-name) org-current-: 
> export-file))}.
> `----
> 
> Thanks!


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

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