update-keys: use gpg.conf to persist versions

It is easier than passing around a dozen options on the command line.

Signed-off-by: Christian Hesse <mail@eworm.de>

update-keys

@@ -8,7 +8,16 @@ TMPDIR=$(mktemp -d)
 trap "rm -rf '${TMPDIR}'" EXIT
 
 KEYSERVER='hkp://pool.sks-keyservers.net'
-GPG=(gpg --quiet --batch --no-tty --no-permission-warning --export-options no-export-attributes --keyserver "${KEYSERVER}" --homedir "${TMPDIR}")
+GPG=(gpg --homedir "${TMPDIR}")
+
+cat << __EOF__ > "${TMPDIR}"/gpg.conf
+quiet
+batch
+no-tty
+no-permission-warning
+export-options no-export-attributes
+keyserver ${KEYSERVER}
+__EOF__
 
 pushd "$(dirname "$0")" >/dev/null