post_install() {
  echo "updating scrollkeeper catalogue ..."
  scrollkeeper-update -q -p /var/lib/scrollkeeper
  update-desktop-database -q
}

post_upgrade() {
  echo "updating scrollkeeper catalogue ..."
  update-desktop-database -q
  scrollkeeper-update -q -p /var/lib/scrollkeeper
}

post_remove() {
  post_install $1
}

op=$1
shift

$op $*