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Re: How is the return value of `org-babel-execute:FOO` interpreted?


From: Ihor Radchenko
Subject: Re: How is the return value of `org-babel-execute:FOO` interpreted?
Date: Sun, 03 Oct 2021 17:38:10 +0800

Kodi Arfer <listu@arfer.net> writes:

> I have an `org-babel-execute` function for the Hy programming language that 
> seems to have partly broken when I upgraded Org (from 9.1.14 to 9.4.6). It 
> has code to write a plot to a file when a `:file` argument is given to the 
> code block. It returns `nil` in this case, and previously, Org would 
> automatically insert a link to the file in the results block, as desired. 
> Now, however, the `nil` is printed in the results block. So I guess have to 
> edit the function to return a link instead, but I can't find documentation 
> for how Org interprets the return value of an `org-babel-execute` function: 
> as I vaguely recall, you have to use a certain cons structure to produce a 
> table, another to produce a link, and so on. So the concrete question in this 
> case is: what do I return to put a link in the document?

I just tested using ob-gnuplot and :file link is correctly inserted when
org-babel-execute:gnuplot returns nil.

Are you sure that you have :file parameter in the source block you tried
to execute?

Best,
Ihor




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