From mboxrd@z Thu Jan  1 00:00:00 1970
From: Ken Mankoff <mankoff@gmail.com>
Subject: Re: Macro that calls external program
Date: Mon, 11 Mar 2019 20:24:04 +0100
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To: Josh <jnfo-d@grauman.com>
Cc: emacs-orgmode@gnu.org

Hi Josh,

On 2019-03-10 at 23:37 +0100, Josh <jnfo-d@grauman.com> wrote...
> I am new to emacs and orgmode. I spent the last couple days reading
> most of the docs before diving in,

Welcome!

> but I didn't see anywhere how I could have a macro that instead of
> replacing the macro with lisp code, calls an external program instead.
>
> Something like:
> #+MACRO: func   call /home/josh/mybinary $1
>
> {{{func(Text Argument)}}}
>
> and this would be setup to call an external program and the output of
> the program would replace the macro on export.
>
> /home/josh/mybinary "Text Argument"

I do wonder if you're asking an XY problem, especially after reading your follow-up question about running an entire Org file through a pre-filter.

Why does it have to be a macro that you call? Why not #+NAME:'d Babel code block, which can (presumably) run any program you want.

  -k.