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

[Eric Schulte]

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 tsh...@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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Re: [Orgmode] Re: [babel] exports, caching, remote execution

[Eric Schulte]

Hi Tom,

Thanks for pointing this out.  It appears that during export the code
block is evaluated in an altered version of the original buffer in which
(for some reason) Babel is sometimes not able to find properties which
are tucked away in either a #+Babel: line at the top of the file, or as
properties of an enclosing headline level.

This certainly merits a closer investigation, and has been recorded as a
bug.  Most likely it will require picking apart the subtleties of the
actions taken by the exporter.

Thanks -- Eric

Tom Short tsh...@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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