#!/bin/bash

# Clone drive partition table
sfdisk -d /dev/sda | sfdisk /dev/sdb

# Create degraded RAIDs, format, and mount
mdadm --create /dev/md0 -l raid1 -f -n 1 /dev/sdb3
mdadm --create /dev/md1 -l raid1 -f -n 1 /dev/sdb4
mdadm --detail --scan > /etc/mdadm.conf
mkfs.ext4 /dev/md0
mkswap /dev/md1
if [ ! -d "/mnt/md0" ]; then
    mkdir /dev/md0
fi
mount /dev/md0 /mnt/md0

# Get Blkid of EXT4
NEWROOTUUID=`blkid -o udev /dev/md0 | grep ID_FS_UUID= | sed 's/ID_FS_UUID=//'`
OLDROOTUUID=`blkid -o udev /dev/sda3 | grep ID_FS_UUID= | sed 's/ID_FS_UUID=//'`
NEWSWAPUUID=`blkid -o udev /dev/md1 | grep ID_FS_UUID= | sed 's/ID_FS_UUID=//'`
OLDSWAPUUID=`blkid -o udev /dev/sda4 | grep ID_FS_UUID= | sed 's/ID_FS_UUID=//'`
echo "Root UUID: Old $OLDROOTUUID  -  New $NEWROOTUUID"
echo "Swap UUID: Old $OLDSWAPUUID  -  New $NEWSWAPUUID"

# Make appropriate config file changes
cp /etc/fstab /etc/fstab.bak
sed -i "s/$OLDROOTUUID/$NEWROOTUUID/g" /etc/fstab
sed -i "s/LABEL=SWAP/UUID=$NEWSWAPUUID/" /etc/fstab
cp /etc/sysconfig/bootloader /etc/sysconfig/bootloader.bak
sed -i "s/$OLDROOTUUID/$NEWROOTUUID/g" /etc/sysconfig/bootloader
cp /etc/default/grub /etc/default/grub.bak
sed -i "s/$OLDROOTUUID/$NEWROOTUUID/g" /etc/default/grub
grub2-mkconfig -o /boot/grub2/grub.cfg


# Finally copy the file system and update/install grub2
rsync -avP --numeric-ids --exclude='/dev' --exclude='/proc' --exclude='/sys' --exclude='/mnt' / /mnt/md0
grub2-install /dev/sda
grub2-install /dev/sdb

# On reboot, Select OpenSuSE v.15.1 on /dev/md0
# The missing bit of magic