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Re: How to expand macros in tangled code blocks?

From: Diego Zamboni
Subject: Re: How to expand macros in tangled code blocks?
Date: Wed, 26 Aug 2020 00:52:30 +0200

To follow up on my own question, I figured out a solution. I added three hooks with the following local variables:

# Local Variables:
# eval: (add-hook 'org-babel-pre-tangle-hook (lambda () (setq zz/saved-macro-templates org-macro-templates)) :append :local)
# eval: (add-hook 'org-babel-post-tangle-hook (lambda () (makunbound 'zz/saved-macro-templates)) :append :local)
# eval: (add-hook 'org-babel-tangle-body-hook (lambda () (when (boundp 'zz/saved-macro-templates) (org-macro-replace-all zz/saved-macro-templates))) :append)
# End:

This works! The first hook saves the current buffer's macros to a temporary variable before starting the tangle, which gets unbound by the second hook, and the third one uses it on each code block's body to expand the macros.

This feels a bit clunky, because of the need to define multiple hooks, but also because the third hook (and the temporary variable) cannot be made buffer-local, because the operation happens across different buffers (each =org-babel-tangle-body-hook= runs in a new temporary buffer with that block's body in it). So the third hook will remain in effect for any other org buffers I edit in the same session. Since the first two hooks are buffer-local, it will have no effect, but it still feels hacky.

If anyone has ideas for how this could be done in a better/cleaner way, I'd love to hear about it.


On Tue, Aug 25, 2020 at 9:59 AM Diego Zamboni <diego@zzamboni.org> wrote:
Hi everyone,

Is it possible to expand Org macros in tangled code blocks? I found this old message: https://lists.gnu.org/archive/html/emacs-orgmode/2011-03/msg00857.html, but the mentioned org-export-preprocess-apply-macros doesn't seem to exist anymore.

Thanks for any tips,

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