Re: org-exp-block patch and Graphviz Demo

["Eric Schulte" <schulte.eric@gmail.com>]

Russell Adams <RLAdams@AdamsInfoServ.Com> writes:

> I've looked, and it appears that the sed line is no longer required,
> it was an old hack.
>
> Regarding graphviz inclusion in PDF, the best output is still obtained
> by dot -> EPS, and then epstopdf -> PDF, and its inclusion in latex.
>
> How would you handle that in org-exp-block.el?
>

#+begin_dot out.pdf -Tpdf
digraph test {
a -> { b c d e };
e -> { f g h i };
};
#+end_dot

can be used with the current setup to go straight from dot -> PDF.

Since you would rather go to EPS as an intermediary step, then I would
recommend defining a new block type which can handle this two-stage
process.  There are instructions in org-exp-blocks.el, and I would
recommend using `org-export-blocks-format-dot' in
contrib/lisp/org-exp-blocks.el as your starting point.  It should be
possible to achieve the result your want with only one or two lines of
new elisp probably inserted right after the following line

  (shell-command (concat "dot " data-file " " args " -o " out-file))

Cheers -- Eric

>
> Thanks.
>
> On Thu, May 28, 2009 at 03:57:42PM -0700, Eric Schulte wrote:
>> 
>> That's fantastic, much simpler than the patch!
>> 
>> Russell Adams <RLAdams@AdamsInfoServ.Com> writes:
>> 
>> > Nicolas,
>> >
>> > You're right! I'd never seen -K, and its not in the manual page
>> > either. But clearly enough:
>> >
>> > $ dot --help
>> > Usage: dot [-Vv?] [-(GNE)name=val] [-(KTlso)<val>] <dot files>
>> >
>> > ...
>> >
>> >  -Kv         - Set layout engine to 'v' (overrides default based on command name)
>> >
>> > I just tried it in the example I had supplied, and it worked properly!
>> >
>> > #+BEGIN_dot dot neato.png -Tpng -Kneato
>> > digraph test {
>> >
>> > a -> { b c d e };
>> > e -> { f g h i };
>> >
>> > };
>> >
>> > #+END_dot
>> >
>> > Perhaps the patch and changes for that are pointless after all!
>> >
>> > I went back and checked the postscript / EPS issue, and it is still
>> > present.
>> >
>> > Thanks for that neat tip!
>> >
>> >
>> > On Thu, May 28, 2009 at 08:03:23PM +0200, Org Mode List wrote:
>> >> Hello,
>> >> 
>> >> I could be wrong, but org-exp-block.el already provides support for any
>> >> Graphviz command since you can add the option -K as an argument to dot.
>> >> 
>> >> Then again, I can have mistaken your point.
>> >> 
>> >> -- 
>> >> Nicolas Goaziou
>> >> 
>> >> 
>> >> 
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>> >
>> >
>> > ------------------------------------------------------------------
>> > Russell Adams                            RLAdams@AdamsInfoServ.com
>> >
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> ------------------------------------------------------------------
> Russell Adams                            RLAdams@AdamsInfoServ.com
>
> PGP Key ID:     0x1160DCB3           http://www.adamsinfoserv.com/
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