Re: [BABEL] "unset" :var definitions for subtree

[Rainer M Krug <r.m.krug@gmail.com>]

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On 02/11/2011 02:49 PM, Dan Davison wrote:
> [...]
>>> 2. It should be possible somehow to include the options together with
>>>    the shebang, or to replace :shebang with a more general "preamble"
>>>    concept. Or to make :shebang accept a code block as its value.
>>>
>>> --------------------------------------------
>>> #+BABEL: :var A=13
>>> #+BABEL: :var B=14
>>>
>>> #+header: :shebang #!/bin/bash #$ -cwd
>>> #+begin_src sh :tangle script.sh
>>> # empty
>>> #+end_src
>>> --------------------------------------------
>>
>> Similar to above - should work, but now the options for torque are
>> hidden in the shebang - which is not to nice, but should work - although
>> changing the options is not nearly as nice as if the options are in the
>> source block.
> 
> It seems that we should be able to put the preamble lines in a src
> block. This works, but only after making an alteration to the sbe
> function (below) so that it will allow multiple line results. Maybe Eric
> will have some ideas here.

I think that would be a good idea and make it much more flexible.
If one could then have a source block which would only consist of the
text and not with e.g. echo '', I think it would be perfect.


> 
> ---------------------------------------
> #+BABEL: :var A=13
> #+BABEL: :var B=14
> 
> #+srcname: sheb
> #+begin_src sh :results output
> echo '#!/bin/bash'
> echo '#$ -cwd'
> #+end_src
> 
> #+header: :shebang (sbe sheb)
> #+begin_src sh :tangle script.sh
> # empty
> #+end_src
> ---------------------------------------
> 
> 
>        (setq source-block (symbol-name source-block)))
> -    (org-babel-table-truncate-at-newline ;; org-table cells can't be multi-line
>       (if (and source-block (> (length source-block) 0))
>           (let ((params
>                  (eval `(org-babel-parse-header-arguments
> @@ -116,7 +115,7 @@ example above."
>                                  ")")))))
>             (org-babel-execute-src-block
>              nil (list "emacs-lisp" "results" params) '((:results . "silent"))))
> -       ""))))
> +       "")))
> 
> 
> Dan


- -- 
Rainer M. Krug, PhD (Conservation Ecology, SUN), MSc (Conservation
Biology, UCT), Dipl. Phys. (Germany)

Centre of Excellence for Invasion Biology
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