From mboxrd@z Thu Jan  1 00:00:00 1970
From: Leo Famulari <leo@famulari.name>
Subject: bug#24076: gnupg [-agent]: when signing [commits],
 it claims that there is no pinentry - but there is
Date: Fri, 27 Mar 2020 16:02:26 -0400
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On Thu, Mar 26, 2020 at 01:09:40PM +0100, Ludovic Courtès wrote:
> I (finally!) implemented this second option in commit
> c7af9d0b5ebaa1fdb08ff5d8a56004998bcd8103.

It still doesn't work for me :/

> I confirmed that it has the indented effect like this:
[...]
> where the strace log shows:
> 
>   10    execve("/home/ludo/.gnupg/.guix-profile/bin/pinentry", ["pinentry"], 0x7f7aa80035e0 /* 14 vars */) = -1 ENOENT (No such file or directory)

This path includes the ~/.gnupg directory, so users need to do `export
GNUPGHOME=$HOME` for the lookup to work.

Is it okay to make GnuPG do that automatically when building the path in
get_default_pinentry_name()?