post_install() {
  echo -n "Updating vim help tags..."
  /usr/bin/vim --noplugins -u NONE -U NONE \
      --cmd ":helptags /usr/share/vim/vimfiles/doc" --cmd ":q" > /dev/null 2>&1
  echo "done."
}
post_upgrade() {
  post_install
}
post_remove() {
  post_install
}