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post_install() {
  cat << _EOF

==> Installation:
==> Add theme to your /etc/default/grub: GRUB_THEME="/boot/grub/themes/Archxion/theme.txt"
==> Preferred resolution 1024x768: GRUB_GFXMODE=1024x768
==> Update grub:# grub-mkconfig -o /boot/grub/grub.cfg

_EOF
}

pre_upgrade() {
  checkver=$(pacman -Qs grub2-theme-archxion | head -n 1 | awk '{print $2}')
  target=/boot/grub/themes/Archlinux

  if [[ $checkver == "1.0-1" ]]; then
     if [ -d "$target" ]; then
        rm -rf /boot/grub/themes/Archlinux
     fi
  fi
}

post_upgrade() {
  cat << _EOF

==> Install target changed to /boot/grub/themes/Archxion
==> No longer needed to copy /usr/share/grub/themes/Archxion to /boot/grub/themes/

_EOF
}