PREUN

/bin/sh

if [ $1 -eq 0 ] ; then 
        # Package removal, not upgrade 
        systemctl --global disable gnupg-agent.service >/dev/null 2>&1 || : 
fi

POSTIN

/bin/sh

#systemd_user_post does only preset, we need it enabled such that at
#all login, the service gets started
if [ $1 -eq 1 ]; then
   systemctl --user --global enable gpg-agent.service
fi

POSTUN

/bin/sh

if [ $1 -ge 1 ] ; then 
        # Package upgrade, not uninstall 
        systemctl try-restart gnupg-agent.service >/dev/null 2>&1 || : 
fi