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Re: [O] tangle on export

From: Andreas Leha
Subject: Re: [O] tangle on export
Date: Thu, 24 Sep 2015 13:14:57 +0100
User-agent: Gnus/5.13 (Gnus v5.13) Emacs/25.0.50 (darwin)

Hi Alan,

Rainer M Krug <address@hidden> writes:
> Alan Schmitt <address@hidden> writes:
>> Hello,
>> I have a question I feel is very basic but I did not find the answer in
>> the manual. How can I trigger the tangling of a block upon export.
> Tangling and exporting are two different paths (well - one could see
> tangling as a special case of exporting).
> You have to use an export hook (see
> http://orgmode.org/tmp/worg/org-configs/org-hooks.html for a list of
> hooks in org).
> I have done something similar to run a post-tangle hook:
> #+begin_src emacs-lisp
> (defvar org-babel-tangle-run-postTangleScript nil
>   "If non-nil, postTangleScript.sh will be executed")
> (put 'org-babel-tangle-run-postTangleScript 'safe-local-variable 'booleanp)
> (defun org-babel-run-post-tangle-script ()
>   (when org-babel-tangle-run-postTangleScript
>     (message "running the postTangleScript.sh bash shell script")
>     (shell-command "bash ./postTangleScript.sh")))
> (add-hook 'org-babel-post-tangle-hook 'org-babel-run-post-tangle-script)
> #+end_src
> Cheers,
> Rainer
>> More precisely, I want to give the following example in a lecture:
>> #+name:hello
>> #+begin_src ocaml :tangle myprog.ml
>> Printf.printf "Bonjour le monde !\n"
>> #+end_src
>> #+BEGIN_SRC sh :exports both :results verbatim
>> ocamlc -o myprog myprog.ml
>> ./myprog
>> #+END_SRC
>> where I show a program to be compiled and actually compile it. Is there
>> a header I should put on the "hello" block to tangle it when I export
>> it?
>> Thanks,
>> Alan

if all of this is for a single block, you can get away quite cheaply
with sth along (untested)

#+begin_src emacs-lisp :results silent
    ;; tangle
    (org-babel-goto-named-src-block "hello")
    (org-babel-tangle '(4)))

and make sure this gets executed during export.


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