emacs-orgmode@gnu.org archives
 help / color / mirror / code / Atom feed

From: "Eric Schulte" <schulte.eric@gmail.com>
To: "Olaf.Hamann" <O.Hamann@gmx.net>
Cc: emacs-orgmode@gnu.org
Subject: Re: [Babel] tangle - kind of macro expansion inside src blocks?
Date: Mon, 14 Mar 2011 09:35:07 -0600	[thread overview]
Message-ID: <87y64hyatw.fsf@gmail.com> (raw)
In-Reply-To: <4D7E2683.9040208@gmx.net> (Olaf Hamann's message of "Mon, 14 Mar 2011 15:30:27 +0100")

Hello Olaf,

I've just added a new hook through which you will be able to expand
regular Org-mode style macros in code block bodies during export.  The
following org-mode snippet demonstrates its use.

First, add macro expansion to the new `org-babel-tangle-body-hook'.

#+begin_src emacs-lisp :results silent
  (add-hook 'org-babel-tangle-body-hook
            (lambda () (org-export-preprocess-apply-macros)))
#+end_src

Then define the macro.  Note: you may need to export the buffer before
tangling so that the macro definition is noticed and processed by
Org-mode.

#+MACRO: CONFIG_PARAM01 45

Then on both export and tangling the macro in the following code block
will be replaced.

#+begin_src sh :tangle yes
  echo org-mode set CONFIG_PARAMETER to: {{{CONFIG_PARAM01}}}
#+end_src

Cheers -- Eric

"Olaf.Hamann" <O.Hamann@gmx.net> writes:

> Hello all,
>
> is there a way to do so or are there plans to integrate
> a macro expansion mechanism into org-babel-tangle
> like that one org-mode already provides?
>
> #+MACRO: name replacement
> {{{name}}}
>
>
> I would like to replace config parameter in begin_src...end_src blocks.
> Change at one place in org-file shall change values in tangled code-files.
>
> I helped myself with an ugly hack in org-babel-tangle,
> so that following lines work for me at the moment.
>
> #+MACRO CONFIG_PARAM01 45
>
> #+begin_src sh :tangle file1.sh
>      echo org-mode set CONFIG_PARAMETER to: {{{CONFIG_PARAM01}}}
> #+end_src
> #+begin_src sh :tangle file2.sh
>      echo org-mode set CONFIG_PARAMETER to: {{{CONFIG_PARAM01}}}
> #+end_src
>
> (this is an example only - the language which I tangle to is not good at 
> local vars support,
> so using $CONFIG_PARAMETER inside tangled code is no solution to me)
>
> But this is no solution, so I ask whether there is already some 
> functionality to do like this,
> which will nicely fit into the aspects of different languages to be used 
> in src blocks.
> Work of org-babel-detangle will be harder when using such a macro 
> functionality
> (supported languages need inline comments, what to do with other? ).
>
> Regards,
> Olaf

next prev parent reply	other threads:[~2011-03-14 15:35 UTC|newest]

Thread overview: 3+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2011-03-14 14:30 [Babel] tangle - kind of macro expansion inside src blocks? Olaf.Hamann
2011-03-14 15:35 ` Eric Schulte [this message]
2011-03-14 18:06   ` Olaf.Hamann

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

  List information: https://www.orgmode.org/

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=87y64hyatw.fsf@gmail.com \
    --to=schulte.eric@gmail.com \
    --cc=O.Hamann@gmx.net \
    --cc=emacs-orgmode@gnu.org \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link

Code repositories for project(s) associated with this public inbox

	https://git.savannah.gnu.org/cgit/emacs/org-mode.git

This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for read-only IMAP folder(s) and NNTP newsgroup(s).