John Kitchin <jkitchin@andrew.cmu.edu> writes:

> so picky ;)

Jup - aren't all org users like that?

> Maybe something like this will put that stamp in a comment
> that won't export.
>
> #+BEGIN_SRC emacs-lisp
> (defun j-add-ts ()
>   (save-excursion
>     (re-search-forward "#\\+END_SRC")
>     (forward-line)
>     (beginning-of-line)
>     (when (looking-at "# Last run:")
>       (kill-line))
>     (insert (concat
>              "# Last run: "
>              (format-time-string "[%Y-%m-%d %a %H:%M:%S]" (current-time))))))
>
>
> (add-hook 'org-babel-after-execute-hook
>           'j-add-ts)
>
> ;(remove-hook 'org-babel-after-execute-hook
> ;         'j-add-ts)
> #+END_SRC

Perfect! I added it to my emacs.org just now and I relly like it.

Thanks a lot,

Rainer

>
>
> Rainer M Krug writes:
>
>> John Kitchin <jkitchin@andrew.cmu.edu> writes:
>>
>>> Here is one approach:
>>>
>>> #+name: update-timestamp
>>> #+BEGIN_SRC emacs-lisp :var data=""
>>> (concat
>>>  "Last run: "
>>>  (format-time-string "[%Y-%m-%d %a %H:%M:%S]" (current-time))
>>>  "\n" data)
>>> #+END_SRC
>>>
>>>
>>> #+BEGIN_SRC python :post update-timestamp(data=*this*)
>>> print('hello')
>>> #+END_SRC
>>>
>>> #+RESULTS:
>>> : Last run: [2015-09-21 Mon 11:09:18]
>>> : hello
>>
>> Thanks John - that looks nice and I like the idea of using
>> (current-time) and the possibility to format the time string, but this
>> info will be part of the export - and I only would like tho have the
>> info in the org file and not in the exported document.
>>
>>
>> Rainer
>>
>>>
>>>
>>>
>>> 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?
>>>>
>>>> Thanks,
>>>>
>>>> Rainer
>>>
>>> --
>>> Professor John Kitchin
>>> Doherty Hall A207F
>>> Department of Chemical Engineering
>>> Carnegie Mellon University
>>> Pittsburgh, PA 15213
>>> 412-268-7803
>>> @johnkitchin
>>> http://kitchingroup.cheme.cmu.edu
>
> --
> Professor John Kitchin
> Doherty Hall A207F
> Department of Chemical Engineering
> Carnegie Mellon University
> Pittsburgh, PA 15213
> 412-268-7803
> @johnkitchin
> http://kitchingroup.cheme.cmu.edu

-- 
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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email:      Rainer@krugs.de

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