Re: Problems with capture and lisp code

[Nicolas Goaziou <mail@nicolasgoaziou.fr>]

Hello,

Thomas Holst <thomas.holst@de.bosch.com> writes:

> for my work flow I would like to set up a capture template based on the
> ideas described in:
>
> http://www.jboecker.de/2010/04/14/general-reference-filing-with-org-mode.html#sec-5
>
> The original is based on remember but I want to use capture. The
> principle is as follows:
>
> In the capture template run some lisp code which appends a function to
> `org-capture-before-finalize-hook' which calls `org-attach-mv' to attach
> a file.
>
> The function run from capture template looks like this:
>
> #+begin_src emacs-lisp
> (defun th:filing-install-attach-mv-hook ()
>   "call this from a capture template to install th:filing-attach-mv-hook"
>   (add-hook 'org-capture-before-finalize-hook 'th:filing-attach-mv-hook)
>   (make-local-variable 'kill-buffer-hook)
>   (add-hook 'kill-buffer-hook 'th:filing-uninstall-attach-mv-hook)
>   (add-hook 'org-capture-mode-hook 'th:filing-uninstall-attach-mv-hook)
>   (message "finalize-hook: %s" org-capture-before-finalize-hook))
> #+end_src
>
> In the messages buffer I can see that at run time of the function
> `th:filing-attach-mv-hook' is in `org-capture-before-finalize-hook'.
>
> Now when I look at `org-capture-before-finalize-hook' in the final
> capture buffer `th:filing-attach-mv-hook' is not there.
>
> The same happens with `kill-buffer-hook'. I also tried
> `org-capture-prepare-finalize-hook'. Same result.
>
> So I am puzzled here :-(. Is there some caching mechanism involved? For
> the author of the article stated above this worked with remember - but
> why does it not work with capture.

Wild guess: capture template is expanded in a temporary buffer, which is
killed once the process is complete. Therefore, the uninstall hook
installed in `kill-hook-buffer' removes your function before it is
actually used.


Regards,

-- 
Nicolas Goaziou