available() {
    which "$1" >/dev/null 2>&1
}

post_install() {
	update-mime-database /usr/share/mime >/dev/null
	update-desktop-database -q /usr/share/applications

	if available gtk-update-icon-cache; then
			gtk-update-icon-cache -q /usr/share/icons/hicolor
	fi
}

post_upgrade() {
    post_install
}

post_remove() {
    post_install
}