post_install() {
    if [[ -x usr/bin/xdg-icon-resource ]]; then
        usr/bin/xdg-icon-resource forceupdate
    fi
    if [[ -x usr/bin/update-desktop-database ]]; then
        usr/bin/update-desktop-database -q
    fi
}

post_upgrade() {
    post_install
}

post_remove() {
    post_install
}