# arg 1:  the new package version
# arg 2:  the old package version

_picheck() {
  if grep -qe '^\s*HOOKS=.*\<mdadm\>' '/etc/mkinitcpio.conf'; then
    echo 'The old mkinitcpio hook "mdadm" is no longer supported'
    echo 'In /etc/mkinitcpio.conf HOOKS= change "mdadm" to "mdadm_udev"'
  fi
}

post_upgrade() {
  if [ "$(vercmp "$2" '2.6.8-2')" -lt 0 -a "$(grep 'raid_partitions' '/etc/mkinitcpio.conf')" ]; then
    echo "Attention mdadm update:"
    echo "raid_partitions hook has been replaced by the more powerfull mdadm hook."
    echo "Please update your /etc/mkinitcpio.conf accordingly."
  fi
  #if [ -s '/etc/mkinitcpio.conf' ] && grep -q '^\s*HOOKS=".*\smdadm\s.*$' '/etc/mkinitcpio.conf'; then
  #  echo "Attention mdadm update:"
  #  echo "mdadm is deprecated for mdadm_udev"
  #  echo "See the ArchWiki and update your /etc/mkinitcpio.conf accordingly."
  #fi
  if ! mdadm -D --scan >/dev/null; then
    cat '/proc/mdstat'
    tput 'rev'
    echo 'One or more arrays may be damaged. Please repair soon.'
    tput 'sgr0'
  fi
  _picheck
}

post_install() {
  post_upgrade
  # Moving from mdadm to mdadm-git doesn't count as an upgrade so pacman renames the config to pacsave.
  # We'll restore it so that changing from mdadm -> mdadm-git will be seamless without having to repair a broken boot.
  # This also works for remove and reinstall so long as you don't damage your system too much while mdadm is away.
  # Unfortunately moving from mdadm-git back to mdadm won't be seamless unless that installer is fixed.
  # We try our best to pick the file that has the arrays in it.
  if [ -s '/etc/mdadm.conf.pacsave' ] && grep -q '^\s*ARRAY\s' '/etc/mdadm.conf.pacsave'; then
    if [ ! -s '/etc/mdadm.conf' ] || ! grep -q '^\s*ARRAY\s' '/etc/mdadm.conf'; then
      mv '/etc/mdadm.conf.pacsave' '/etc/mdadm.conf' && echo '/etc/mdadm.conf restored from /etc/mdadm.conf.pacsave'
    fi
  fi
  _picheck
}

pre_remove() {
  if [ -e '/proc/mdstat' ]; then
    echo 'You still have active arrays. mdadm should be reinstalled soon.'
  fi
}