Re: org-babel-tangle indentation

From: "Eric Schulte" <schulte.eric@gmail.com>
To: emacs-orgmode@gnu.org
Subject: Re: org-babel-tangle indentation
Date: Thu, 08 Oct 2009 08:31:14 -0600	[thread overview]
Message-ID: <m263aqx8i5.fsf@gmail.com> (raw)
In-Reply-To: <86skduat8g.fsf@portan.ibr.cs.tu-bs.de> (Chris Gray's message of "Thu, 08 Oct 2009 15:51:59 +0200")

Hi Chris,

You have touched upon a true limitation in the current tangle
functionality.  I think this issue has two parts (one of which you
address below).

1) it is impossible to specify a piece of heavily indented code in a
   source-code block.  For example

--8<---------------cut here---------------start------------->8---
#+begin_src python
          9
#+end_src
--8<---------------cut here---------------end--------------->8---

   will always be exported as 

--8<---------------cut here---------------start------------->8---
9
--8<---------------cut here---------------end--------------->8---

   because Org-babel strips off any leading spaces.  This problem is
   exacerbated by the fact that C-' org-edit-special also strips off
   leading spaces.

2) There is no way to specify the level at which the contents of a
   source block should be indented.  You provided a good solution to
   this second issue below, and I'm adding it to the org-babel task
   stack.

Thanks -- Eric

Chris Gray <chrismgray@gmail.com> writes:

> Hi,
>
> I've been using org-babel for a couple of weeks now and I really like it
> for programming.  One thing I've noticed, though, is that source blocks
> are not indented when they are output by org-babel-tangle.  This makes
> the output source hard to read, and incorrect for languages where
> indentation is important.
>
> For example, the following bit of python does not compile when tangled. 
>
> * Introduction
>
>   This is some intro text.
>
> #+srcname: the first block
> #+begin_src python :tangle foo :exports none
>   print '1 + 1'
>   if 1 + 1 == 2:
>       print 'oh no'
>   else:
>       # <<do the other thing>>
> #+end_src
>
>   Some more text.
>
> #+srcname: do the other thing
> #+begin_src python :tangle no :exports none
>   print 'oh yes'
> #+end_src
>
> My preference would be for source blocks to be indented to the level of
> the comment that caused them to be inserted.
>
> Cheers,
> Chris
>
>
>
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