From mboxrd@z Thu Jan  1 00:00:00 1970
From: Rafael Laboissiere <rafael@laboissiere.net>
Subject: Re: [PATCH] call_*() is not working inside #+DATE
Date: Sat, 12 Mar 2016 10:34:51 +0100
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	<20160312075704.GI16308@laboissiere.net> <877fh8oz9g.fsf@ucl.ac.uk>
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* Eric S Fraga <e.fraga@ucl.ac.uk> [2016-03-12 08:51]:

> On Saturday, 12 Mar 2016 at 08:57, Rafael Laboissiere wrote:
>> P.S.: For those who are reading this message and are interested in a
>> solution for my original problem, here is the way I am getting around it
>> right now.
>
> Thanks for this alternate solution.

You are welcome.

It would be much better if the following construct worked:

    #+DATE: src_sh{git show -s --date=short --format="%cd [%h]" HEAD}

Unfortunately, it does not.  This behavior (or misbehavior, I do not 
know) can be traced down to the org-element-context function.  Suppose 
that you have the following content in a org-mode buffer:

    #+DATE: src_sh{date}
    src_sh{date}

With the cursor just after the underscore in the #+DATE line, 
org-element-context returns:

    (keyword
     (:key "DATE" :value "src_sh{date}" :begin 1 :end 22 :post-blank 0 :post-affiliated 1 :parent nil))

On the other hand, with the cursor just after the underscore in the next 
line, org-element-context returns (as it should be):

    (inline-src-block
     (:language "sh" :value "date" :parameters nil :begin 22 :end  34 :post-blank 0
       :parent (paragraph (:begin 22 :end 35 :contents-begin 22 :contents-end 35 :post-blank 0
                           :post-affiliated 22 :parent nil))))

This is the reason why Org-babel does not evaluate the inline source 
block in the #+DATE line.

Best,

Rafael Laboissière