Re: [PATCH] t/gpg: simplify test for unknown key

> To test for a key that is completely unknown to the keyring we need one
> to sign the commit with. This was done by generating a new key and not
> add it into the keyring. To avoid the key generation overhead and
> problems where GPG did hang in CI during it, switch GNUPGHOME to an
> empty directory instead, therefore making all used keys unknown for this
> single `verify-commit` call.
> 
> Reported-by: Ævar Arnfjörð Bjarmason <avarab@gmail.com>
> Signed-off-by: Fabian Stelzer <fs@gigacodes.de>
> ---
> This was reported by Ævar in <211222.86ilvhpbl0.gmgdl@evledraar.gmail.com>.
> Just using an empty keyring / gpg homedir should achieve the same effect and 
> keeps the stress of generating a gpg key out of the CI.