Re: [Orgmode] [BABEL] Bugin :session? Export html - works --- export pdf not

[Carsten Dominik]

On Jul 9, 2010, at 9:21 AM, Rainer M Krug wrote:

> On Thu, Jul 8, 2010 at 8:40 PM, Eric Schulte  
> <address@hidden> wrote:
> Hi Rainer,
>
> Hi Eric
>
>
> I am aware of this problem, and although I don't know any a good
> solution, I do have a good workaround (example attached [1]).
>
> That workaround looks really good - thanks. Much better then  
> putting :session at the beginning of each source block.
>
>
> The problem is that org-latex removes all of the #+ lines from the
> beginning of any Org-mode file which has headlines as part of the  
> export
> process.  This means that by the time it's Babel's turn to run code
> blocks, the #+BABEL line has been removed, and the session is not set.
> If there are no headlines, then this problem does not arise.
>
> OK - that explains.
>
>
> I sent in a patch last week, [2] but it's application would have  
> broken
> other features of the latex export, I've yet to work out a good  
> solution
> to this.
>
> There is a decent work-around.  Whenever there are no headlines, then
> the #+BABEL: line works fine on LaTeX export, when there are  
> headlines,
> then header arguments can be placed as properties in the headlines to
> the same effect.
>
> Would it be possible to issue a warning if a #+BABEL line is  
> stripped by LaTeX? If I think back, this stripping cost me quite  
> some time to figure out why things are working differently when  
> exporting to LaTeX then html.

No, we really need to fix this.

Can someone please try if the following patch does fix this issue?

diff --git a/lisp/org-latex.el b/lisp/org-latex.el
index 70298fd..3cfa36c 100644
--- a/lisp/org-latex.el
+++ b/lisp/org-latex.el
@@ -1221,9 +1221,16 @@ If END is non-nil, it is the end of the region."
            :timestamps (plist-get opt-plist :timestamps)
            :footnotes (plist-get opt-plist :footnotes)))
        (org-unmodified
-        (let ((inhibit-read-only t))
-          (add-text-properties pt (max pt (1- end))
-                               '(:org-license-to-kill t))))))))
+        (let ((inhibit-read-only t)
+              (limit (max pt (1- end))))
+          (add-text-properties pt limit
+                               '(:org-license-to-kill t))
+          (save-excursion
+            (goto-char pt)
+            (while (re-search-forward "^[ \t]*#+.*\n?" limit t)
+              (remove-text-properties (match-beginning 0) (match-end 0)
+                               '(:org-license-to-kill t))))))))))
+       

 (defvar org-export-latex-header-defs nil
   "The header definitions that might be used in the LaTeX body.")


Thanks

- Carsten



> Cheers -- Eric
>
> Cheers,
>
> Rainer
>
>
> Rainer M Krug <address@hidden> writes:
>
> > Hi
> >
> > I have the attached org file.
> >
> > It seems that when exporting to a pdf, the :session argument is  
> ignored, as
> > I get a
> > Org-Babel Error Output buffer with:
> > Error: object 'x' not found
> > Execution halted
> >
> > and an Org-Babel Error buffer with the same text, and the  
> resulting pdf does
> > only show the code..
> >
> > HTML export, works as expected.
> >
> > If I put :session *R_test* behind #+begin_src (R2.org) it works.
> >
> > Cheers,
> >
> > Rainer
>
> Footnotes:
> [1]
>
>
> [2]  http://thread.gmane.org/gmane.emacs.orgmode/27081
>
>
>
>
>
> --
> NEW GERMAN FAX NUMBER!!!
>
> Rainer M. Krug, PhD (Conservation Ecology, SUN), MSc (Conservation  
> Biology, UCT), Dipl. Phys. (Germany)
>
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>
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- Carsten