post_install() {
    chmod 777 /var/cache/pacman/pkg

    echo 'transmission-daemon needs to be running for pacman2pacman to work:'
    echo 'systemctl start transmission'
    echo 'systemctl enable transmission'
    echo
    echo 'Put the following into /etc/pacman.conf, under the [options] section: XferCommand = /usr/bin/pacman2pacman-get %u %o'
    echo
    echo 'Note that /var/cache/pacman/pkg has been chmoded 777'
}

post_remove() {
    echo "Don't forget to remove pacman2pacman from pacman.conf's \`XferCommand' setting."
    echo 'Also note that /var/cache/pacman/pkg was chmoded 777 on installation, you might want to change it back.'
}