Re: Problem with sectioning function for LaTeX export

[Carsten Dominik <carsten.dominik@gmail.com>]

On Apr 18, 2010, at 12:05 PM, Sebastian Hofer wrote:

> Hi all,
> I'm trying to write my own sectioning function for latex export of  
> my CV. What it does is to read out some property of the given  
> headline and pass it to a latex command:
>
> (defun my-org-cv-sectioning (lvl heading)
>  (let ((year)
>        (formatlist)
>        (cleanheading (substring-no-properties heading 1)))
>    (with-current-buffer (org-find-base-buffer-visiting "cv.org")
>      (let ((headingpoint (find-custom-id cleanheading)))
>        (if headingpoint
>            (progn
>              (goto-char headingpoint)
>              (setq year (org-entry-get nil "YEAR"))))))
>    (setq formatlist (nth (- 1 lvl) my-org-cv-sectioning-list))
>    (list cleanheading
>          (format (car formatlist) (if year year "") cleanheading)
>          (format (car (cdr formatlist)) (if year year "")  
> cleanheading))))
>
> The function find-custom-id returns the point of the heading, my-org- 
> cv-sectioning list contains the customized latex commands. As you  
> may see, I'm an elisp newbie, so excuse the coding style, or even  
> better, make suggestions for improvements! There might be a much  
> nicer way to read out the wanted properties (also cf. point 2  
> below), so if you have any suggestions on that, I would be glad to  
> hear them!
>
> Anyway, there are currently two problems:
>
> - The function reads out the properties correctly, but the export  
> command throws an error. So I guess I'm not getting the format of  
> the output right, but I can't really make sense of the description  
> in the org-export-latex-classes docstring. Currently the function is  
> returning something like this: ("Heading" ("\section[year]{Heading}"  
> "\section*[year]{Heading}")). Isn't this what it's supposed to look  
> like? The error message is the following:

I think it must be

("Heading" "\section[year]{%s}" "\section*[year]{%s}")

Note the %s for the heading, and also it i just one flat list of 3  
items.

And yes, this is not too well documented.

>
> Debugger entered--Lisp error: (wrong-type-argument stringp nil)
>  format(nil "Heading" "")
>  org-export-latex-subcontent(<snipped>)
>  org-export-latex-sub(<snipped>)
>  org-export-latex-global(((<snipped>))))
>  org-export-as-latex(nil nil nil "*Org LaTeX Export*")
>  org-export-as-latex-to-buffer(nil)
>  call-interactively(org-export-as-latex-to-buffer)
>  org-export(nil)
>  call-interactively(org-export nil nil)
>
> - As you can see I am using org-find-base-buffer-visiting find the  
> buffer of the org file, but of course its argument can't stay  
> hardcoded like this. I could also use the org mapping function, but  
> still I would need filename. Can someone give me a hint how to solve  
> this in a nice way?

Use
    (org-find-base-buffer-visiting org-current-export-file)

HTH

- Carsten