Environment variable GNUPGHOME with Windows + MSYS2

[Thomas Schweikle]

Hi!

Within Windows gnupg uses "%APPDATA%\gnupg" for its keyring and
configurations.
MSYS2 gpg uses "/c/msys/home/%USERNAME%/.gnupg". Now I had the idea to set
GNUPGHOME so both could work with the same directory:

set GNUPGHOME=%APPDATA%\gnupg

This worked for gnupg from the gnupg-package. It worked for Gpg4Win
included gpg as well, but the MSYS included version gave

gpg: keyblock resource
'/c/Users/<user>/AppData/Roaming/gnupg/C:\\Users\\<user>\\AppData\\Roaming\\gnupg/pubring.kbx':
No such file or directory
gpg: Fatal:
/c/Users/<user>/AppData/Roaming/gnupg/C:\\Users\\<user>\\AppData\\Roaming\\gnupg:
directory does not exist!

from an MSYS shell. Any idea how to overcome this problem?

gnupg: 2.2, 2.4, 2.5

-- 
Thomas
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