Re: Set or update timestamp after evaluation of code block?

[Rainer M Krug <Rainer@krugs.de>]

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jorge.alfaro-murillo@yale.edu (Jorge A. Alfaro-Murillo) writes:

> Rainer M Krug writes:
>
>> Eric S Fraga <e.fraga@ucl.ac.uk> writes: 
>>
>>> On Monday, 21 Sep 2015 at 14:46, Rainer M Krug wrote: 
>>>
>>> [...] 
>>>
>>>> Is it possible to set a timestamp (ur update it when it exists
>>>> already) when a code block has been evaluated, so that I have e
>>>> record when it was updated? 
>>>
>>> Could you make use of the :post header argument to invoke emacs
>>> lisp and execute org-time-stamp-inactive in some way? 
>>
>> Thanks - sounds possible? But if I just use 
>>
>> ,---- | :post (org-time-stamp-inactive) `---- 
>>
>> 1) an input is required and 2) the time stamp is inserted before the
>> #+begin_src and makes the block invalid. 
>>
>> How can I put the time stamp in the line after the #+end_src or
>> possibly even in the same line, as this does not seem to have an
>> impact on the source block?
>
> You could use the :epilogue header argument. Since you want after the
> #+end_src this is rather hackish:
>
> :epilogue (save-excursion (re-search-forward "END_SRC" nil nil 2)
> (org-insert-time-stamp (current-time) t t "\nEvaluated: " "\n"))
>
> It does not update the results, but it will show you all the results
> and when they were evaluated.
>
> If you want to keep only one set of results and do not mind having the
> timestamp before the #+BEGIN_SRC, you could use something like:
>
> :epilogue (save-excursion (if (re-search-backward "Last evaluated: "
> nil t) (kill-line 1)) (org-insert-time-stamp (current-time) t t "Last
> evaluated: " "\n"))

The :epilogue won't work, as the source code block is in R and the
epilogue is appended to the code.

But I will look at the elisp code

Thanks,

Rainer
>
> Best,

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

Centre of Excellence for Invasion Biology
Stellenbosch University
South Africa

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