Comment 1 for bug 1801762

I've created a shell wrapper than might be useful for this called "gpgpv-multisig" which is a multi-call executable. Given /usr/bin/gpgv-multisig

ln -s gpgv-multisig /usr/bin/gpgv-aptkeys

and called as 'gpgv-aptkeys' it will assume the keyring to be used is /etc/apt/trusted.gpg (set by APT_KEYRING).

Returns the same exit codes as detailed in man gpgv(1):

0 = all signatures good
1 = at least one signature good
2 = no signatures good

Many configuration variables can be over-ridden from the environment but adopt sensible defaults.