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Re: [O] Macro that calls external program

From: John Kitchin
Subject: Re: [O] Macro that calls external program
Date: Mon, 11 Mar 2019 16:48:10 -0400
User-agent: mu4e 1.0; emacs 26.1

See the variables org-export-before-processing-hook and

You can put something like this in a noexport tagged build heading in
your document. Here I run head on the org-file to just get the first
three lines. you can replace that with your external filter.:

#+BEGIN_SRC emacs-lisp
(let ((org-export-before-parsing-hook '((lambda (backend)
                                          "lightly tested"
                                          (let ((new-doc 
(shell-command-to-string (format "head -n 3 \"%s\"" (buffer-file-name)))))
                                            (insert new-doc))))))

  (org-open-file (org-html-export-to-html)))


Josh <address@hidden> writes:

> Thanks! This is very helpful.
> I have a related question. How can I run an external program right before 
> Export
> that takes as input the current buffer and prints out to stdout an updated
> version of the org file that then is exported? Basically I want to pipe the 
> org
> file through a filter that is an external program before it is exported.
> Thanks in advance!
> Josh
>> On Sunday, 10 Mar 2019 at 15:37, Josh wrote:
>>> Hi,
>>> I am new to emacs and orgmode. I spent the last couple days reading most
>>> of the docs before diving in, 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
>> You could maybe do something along the lines of
>> #+macro: func (eval (shell-command (concat "/home/josh/mybinary " "$1")))
>> (untested).
>> --
>> Eric S Fraga via Emacs 27.0.50, Org release_9.2.2-249-g51444a

Professor John Kitchin
Doherty Hall A207F
Department of Chemical Engineering
Carnegie Mellon University
Pittsburgh, PA 15213

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