Re: [O] [babel] Trouble with :cache yes

[Eric Schulte]

<address@hidden> writes:

> On 3/23/11 12:54 PM, "Williams, Ken (TR Corp Tech)"
> <address@hidden> wrote:
>
>>
>>On 3/23/11 12:28 PM, "Eric Schulte" <address@hidden> wrote:
>>
>>>Thanks for pointing this out, your example doesn't work for me either.
>>>I tracked this down to a problem of not finding the cached results of
>>>named code blocks.  I've just pushed up a simple fix for this issue, so
>>>caching should now work as expected.
>>
>>Thanks Eric.  In my case I'm seeing the [mis]behavior even when the code
>>block has no name - will your fix cover that case too?
>
> Actually, I just realized I'm mistaken.  If I manually evaluate a
> (non-named) block, *then* export the entire document, I indeed get the
> cached results in the export, as expected.
>
> However, if I change the code of a :cached block somewhere in my document
> (or its MD5 is otherwise invalidated) and re-export the document without
> first doing C-c C-c, the export will neither use the cache (which is good)
> nor save the results back to the cache (which is bad), so the export is
> now out of sync with the original.  It would be great if the results in
> exports could be cached in the same way they would be cached when manually
> evaluating blocks.
>

One of the features of Org-mode export is that the document is not
changed by the act of exporting, so unfortunately you will have to
manually evaluate all code blocks, and save their results before
exporting.

>
> Or perhaps, is there some command to evaluate all blocks in a document
> that need to be re-evaluated, and save the results back to the buffer?  I
> could do that every time before exporting, maybe.
>

Fortunately there is such a function, org-babel-execute-buffer, bound to
C-c C-v b, try C-c C-v h in an Org-mode buffer to see all code block
specific key bindings.

Best -- Eric

>
>
> --
> Ken Williams
> Senior Research Scientist
> Thomson Reuters
> http://labs.thomsonreuters.com