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

KERNEL_VERSION=2.6.27-ARCH

post_install () {
  # updating module dependencies
  echo ">>> Updating module dependencies. Please wait ..."
  depmod $KERNEL_VERSION 
  # generate init ramdisks
  echo ">>> MKINITCPIO SETUP"
  echo ">>> ----------------"
  echo ">>> If you use LVM2, Encrypted root or software RAID,"
  echo ">>> Ensure you enable support in /etc/mkinitcpio.conf ."
  echo ">>> More information about mkinitcpio setup can be found here:"
  echo ">>> http://wiki.archlinux.org/index.php/Mkinitcpio"
  echo ""
  echo ">>> Generating initial ramdisk, using mkinitcpio.  Please wait..."
  /sbin/mkinitcpio -p kernel26
}

post_upgrade() {
  pacman -Q grub &>/dev/null
  hasgrub=$?
  pacman -Q lilo &>/dev/null
  haslilo=$?
  # reminder notices
  if [ $haslilo -eq 0 ]; then
    echo ">>>"
    if [ $hasgrub -eq 0 ]; then
      echo ">>> If you use the LILO bootloader, you should run 'lilo' before rebooting."
    else
      echo ">>> You appear to be using the LILO bootloader. You should run"
      echo ">>> 'lilo' before rebooting."
    fi
    echo ">>>"
  fi

  if grep "/boot" /etc/fstab 2>&1 >/dev/null; then
    if ! grep "/boot" /etc/mtab 2>&1 >/dev/null; then
      echo "WARNING: /boot appears to be a seperate partition but is not mounted"
      echo "         This is most likely not what you want.  Please mount your /boot"
      echo "         partition and reinstall the kernel unless you are sure this is OK"
    fi
  fi

  if [ "`vercmp $2 2.6.13`" -lt 0 ]; then
    # important upgrade notice
    echo ">>>"
    echo ">>> IMPORTANT KERNEL UPGRADE NOTICE"
    echo ">>> -------------------------------"
    echo ">>> As of kernel 2.6.13, DevFS is NO LONGER AVAILABLE!"
    echo ">>> If you still use DevFS, please make the transition to uDev before"
    echo ">>> rebooting.  If you really need to stay with DevFS for some reason,"
    echo ">>> then you can manually downgrade to an older version:"
    echo ">>>"
    echo ">>> # pacman -U http://archlinux.org/~judd/kernel/kernel26-scsi-2.6.12.2-1.pkg.tar.gz"
    echo ">>>"
    echo ">>> If you choose to downgrade, don't forget to add kernel26-scsi to your"
    echo ">>> IgnorePkg list in /etc/pacman.conf"
    echo ">>>"
    echo ">>> (NOTE: The following portion applies to uDev users as well!)"
    echo ">>>"
    echo ">>> If you use any DevFS paths in your GRUB menu.lst, then you will not"
    echo ">>> be able to boot!  Change your root= parameter to use the classic"
    echo ">>> naming scheme."
    echo ">>>"
    echo ">>> EXAMPLES:"
    echo ">>> - change root=/dev/discs/disc0/part3 to root=/dev/sda3"
    echo ">>> - change root=/dev/md/0 to root=/dev/md0"
    echo ">>>"
  fi
  # generate new init ramdisk
  if [ "`vercmp $2 2.6.18`" -lt 0 ]; then
    echo ">>> --------------------------------------------------------------"
    echo ">>> |                          WARNING:                          |"
    echo ">>> |mkinitrd is not supported anymore in kernel >=2.6.18 series!|"
    echo ">>> |              Please change to Mkinitcpio setup.            |"
    echo ">>> --------------------------------------------------------------"
    echo ">>>"
  fi
  # updating module dependencies
  echo ">>> Updating module dependencies. Please wait ..."
  depmod $KERNEL_VERSION
  echo ">>> MKINITCPIO SETUP"
  echo ">>> ----------------"
  if [ "`vercmp $2 2.6.18`" -lt 0 ]; then
    echo ">>> Please change your bootloader config files:"
    echo ">>> Grub: /boot/grub/menu.lst | Lilo: /etc/lilo.conf"
    echo "------------------------------------------------"
    echo "| - initrd26.img to kernel26.img               |"
    echo "| - initrd26-full.img to kernel26-fallback.img |"
    echo "------------------------------------------------"
  fi
  if [ "`vercmp $2 2.6.19`" -lt 0 ]; then
    echo ""
    echo ">>> New PATA/IDE subsystem - EXPERIMENTAL"
    echo ">>> ----------"
    echo ">>> To use the new pata drivers, change the 'ide' hook "
    echo ">>> to 'pata' in /etc/mkinicpio.conf HOOKS="
    echo ">>> The new system changes: /dev/hd? to /dev/sd?"
    echo ">>> Don't forget to modify GRUB, LILO and fstab to the"
    echo ">>> new naming system. "
    echo ">>> eg: hda3 --> sda3, hdc8 --> sdc8"
    echo ""
    echo ">>> piix/ata_piix (Intel chipsets) - IMPORTANT"
    echo "----------"
    echo ">>> If you have enabled ide/pata/sata HOOKs in /etc/mkinitcpio.conf" 
    echo ">>> the 'ata_piix' module will be used."
    echo ">>> This may cause your devices to shift names, eg:"
    echo ">>> - IDE: devices from hd? to sd?"
    echo ">>> - SATA: sda might shift to sdc if you have 2 other disks on a PIIX IDE port."
    echo ">>> To check if this will affect you, check 'mkinitcpio -M' for piix/ata_piix"
    echo ""
  fi

  echo ">>> If you use LVM2, Encrypted root or software RAID,"
  echo ">>> Ensure you enable support in /etc/mkinitcpio.conf ."
  echo ">>> More information about mkinitcpio setup can be found here:"
  echo ">>> http://wiki.archlinux.org/index.php/Mkinitcpio"
  echo ""
  echo ">>> Generating initial ramdisk, using mkinitcpio.  Please wait..."
if [ "`vercmp $2 2.6.19`" -lt 0 ]; then
  /sbin/mkinitcpio -p kernel26 -m "ATTENTION:\nIf you get a kernel panic below
and are using an Intel chipset, append 'earlymodules=piix' to the
kernel commandline"
else
  /sbin/mkinitcpio -p kernel26
fi
if [ "`vercmp $2 2.6.21`" -lt 0 ]; then
  echo ""
  echo "Important ACPI Information:"
  echo ">>> Since 2.6.20.7 all possible ACPI parts are modularized."
  echo ">>> The modules are located at:"
  echo ">>> /lib/modules/$(uname -r)/kernel/drivers/acpi"
  echo ">>> For more information about ACPI modules check this wiki page:"
  echo ">>> 'http://wiki.archlinux.org/index.php/ACPI_modules'"
fi
}

op=$1
shift

$op $*