Re: Re: [babel] exports, caching, remote execution

From: "Eric Schulte" <schulte.eric@gmail.com>
To: Tom Short <tshort@epri.com>
Cc: emacs-orgmode@gnu.org
Subject: Re: Re: [babel] exports, caching, remote execution
Date: Sat, 18 Sep 2010 20:11:49 -0600	[thread overview]
Message-ID: <8739t5hcve.fsf@gmail.com> (raw)
In-Reply-To: loom.20100819T225748-321@post.gmane.org

Hi Tom,

This turned out to be a fairly complicated issue.

During export of a narrowed region the narrowed region will be coppied
to a temporary buffer, when exporting from the buffer all buffer-wide,
and headline-wide parameters which are not included in the region are
ignored.  This results in a different set of header arguments being used
for interactive evaluation than were used for export evaluation.  These
differences in header arguments then invalidate the cache saved during
the interactive evaluation.

I've just put together and pushed a fix which involves jumping back to
the original org file to collect header arguments in context during
export.  This appears to resolve the issue (at least for me).  Please
let me know if it works for you.

Best -- Eric

Tom Short <tshort@epri.com> writes:

> Eric Schulte <schulte.eric <at> gmail.com> writes:
>
>> 
>> Hi Austin,
>> 
>> Austin Frank <austin.frank <at> gmail.com> writes:
>> 
>> > Hey all--
>> >
>> > Two (hopefully quick) questions:
>> >
>> > 1) Does the exporter respect the :cache argument?  When I evaluate a
>> >    buffer, I can tell that cached blocks are not re-run, as expected.
>> >    When I export to \LaTeX or PDF, it seems that all blocks in the file
>> >    are re-run.  Is there a way to force the exporter to respect caching?
>> >
>> 
>> I believe the exporter does respect caching, the following minimal
>> example worked (i.e. was not re-run) for me on export to html.  Could
>> you provide an example that demonstrates the problem?
>
> Eric, here's an example where the exporter does not respect caching. - Tom
>
> #+BABEL: :session *R* :results output :exports both :cache yes
>
> * A test of caching
>
> #+begin_src R 
>   cat("random result:", runif(1), "\n")
>   Sys.sleep(2)
>   alarm()
> #+end_src 
>
> #+results[b2549fac8a1ec2923ae289d47ce55fb2853dd1de]:
> : random result: 0.2799064
>
> #+begin_src R 
>   cat("random result:", runif(1), "\n")
>   Sys.sleep(2)
>   alarm()
> #+end_src 
>
> #+results[b2549fac8a1ec2923ae289d47ce55fb2853dd1de]:
> : random result: 0.1625634
>
> ** cache on export
> do we export cached blocks
>
> #+begin_src emacs-lisp :cache yes :exports results
>   (random)
> #+end_src
>
> #+results[46632b4fe2e3a23e847953c95adcba58c270b381]:
> : 490528137
>
>
>
>
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