Re: [O] org babel before excute hook

[Eric Schulte]

Henning Redestig <address@hidden> writes:

> Is it possible to add a function to org-ctrl-c-ctrl-c-hook without patching
> ob-core.el? If I just add something like
>

Yes, see the documentation of `org-confirm-babel-evaluate'.  So the
function posted in your previous email could be changed to something
like...

    (setf org-confirm-babel-evaluate
          (lambda (&rest args)
            (let* ((info (org-babel-get-src-block-info))
                   (result-file (cdr (assoc :file (nth 2 info))))
                   (duplicat-file-p
                    (save-excursion
                      (goto-char 0)
                      (re-search-forward (concat ":file +" result-file) nil t)
                      (re-search-forward (concat ":file +" result-file) nil 
t)))))
            (if duplicate-file-p
                (prog1 t (message "duplicate result file"))
                nil)))

>
> (add-hook 'org-ctrl-c-ctrl-c-hook 'org-babel-stop-if-file-collision)
>
> in my .emacs I notice that my addition gets overwritten later via the
> autoloads (I think) that are defined in ob-core.el..
>
>
>
> 2013/10/12 Charles Berry <address@hidden>
>
>> John Kitchin <jkitchin <at> andrew.cmu.edu> writes:
>>
>> >
>> >
>> >
>> > I have a related kind of problem. When preparing notes
>> > for a class, I may end up with 70 code blocks in an org file, many of
>> > which create graphics. I am always worried about accidentally using the
>> > same filename and overwriting a graphic from an earlier block. A unique,
>> >  but reproducible filename would be sufficient for my needs.
>> >
>>
>> Header arg values can be elisp calls. You can use `make-temp-file'.
>>
>> So every time this block is executed, a new file is created and the
>> file link is added to the results.
>>
>> #+BEGIN_SRC R :results output append :file (make-temp-file "temp")
>> cat(date(),"\n")
>> #+END_SRC
>>
>> #+RESULTS:
>> [[file:/var/folders/kb/2hchpbyj7lb6z76l0q73w_fh0000gn/T/temp302IjV]]
>> [[file:/var/folders/kb/2hchpbyj7lb6z76l0q73w_fh0000gn/T/temp3028Lu]]
>>
>> See `temporary-file-directory', too, if you want to use this, as the
>> default may not be what you intend.
>>
>>
>> You might want to use this:
>>
>> #+BEGIN_SRC emacs-lisp
>>   (defun local-tfile (file)
>>     (let ((temporary-file-directory "."))
>>       (make-temp-file file)))
>> #+END_SRC
>>
>> Then the files go in the local directory when this is executed:
>>
>> #+BEGIN_SRC R :file (local-tfile "tfile") :results output append
>> cat(date(),"\n")
>> #+END_SRC
>>
>> You might not want `append' in this case.
>>
>>
>> HTH,
>>
>> Chuck
>>
>> [rest deleted]
>>
>>
>>
>>
>>

-- 
Eric Schulte
https://cs.unm.edu/~eschulte
PGP: 0x614CA05D