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From: "Charles C. Berry" <ccberry@ucsd.edu>
Subject: Re: tangling order
Date: Tue, 16 Feb 2016 09:34:22 -0800
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To: Alan Schmitt <alan.schmitt@polytechnique.org>
Cc: emacs-orgmode <emacs-orgmode@gnu.org>, John Kitchin <jkitchin@andrew.cmu.edu>

On Tue, 16 Feb 2016, Alan Schmitt wrote:

> On 2016-02-16 12:42, John Kitchin <jkitchin@andrew.cmu.edu> writes:
>
>> I think you are seeing that the blocks are tangled in reverse. If I add a third
>> arbitrary lang it comes in reverse.
>
> Interesting! Thanks a lot for trying it.
>
> I see that I made the typical scientific method mistake of testing for
> my hypothesis, instead of testing against.
>
>> If they are all the same language, they are in the right order. It looks like
>> org collects by language, so your strategy won't work with org-babel tangle I
>> guess.
>
> I've found a workaround, as it is only for a few blocks I manually
> change their headers, so it is fine at the moment.

Another workaround would be to add after advice to 
`org-babel-get-src-block-info' to map your faux languages to a common 
variant.

> I still think it
> would be great to have better control on the order in which blocks are
> tangled.

If you want to do this inside org/emacs (and not stitch a bunch of tangled 
files together with other tools), try this in your *.org file and execute 
it. The result is what you might work with (i.e. customize or advice the 
function below).

#+BEGIN_SRC emacs-lisp :results pp :tangle foo.ml
(org-babel-tangle-collect-blocks)
#+END_SRC


HTH,

Chuck