pre_install() {
    if [ -z "`grep '^metronome:' /etc/group`" ]; then
        groupadd --system metronome
    fi
    if [ -z "`grep '^metronome:' /etc/passwd`" ]; then
        useradd --system -d /var/lib/metronome -g metronome -s /bin/false metronome
    fi

    chown metronome:metronome var/lib/metronome var/log/metronome
}

pre_upgrade() {
    pre_install $1
}

post_remove() {
    userdel metronome

    paths=(/etc/metronome /var/lib/metronome /var/log/metronome)

    first=true
    for path in ${paths[@]}; do
        if [ -d $path ]; then
            if $first; then
                first=false
                echo "==> Leftover Paths:"
            fi
            echo "==> $path"
        fi
    done
}