USER="user"
PASSWORD="saturn"
NET=`ip -br l | awk '$1 !~ "lo|vir|wl" { print $1}'|head -n 1`
ALL_NICS=`ip -br l | awk '{ print $1}'`
DISK1=`lsblk -dn |awk '{print $1}'|grep -E "sda|nvme"|head -n 1`

echo
echo "NOTE: "
echo "  * This script will setup system to use DHCP by default."
echo "  * If you have a single wired NIC on a network with DHCP it should work by default."
echo "  * Same password is the same for root and non root user by default. Change this after install or override."
echo "  * The default selected disk is the first block device found."
echo "  * This installer should support both BIOS and UEFI."
echo "  * Swap is set to zero"
echo "  * Timezone, locale, and keyboard layout are hardcoded.  Override if needed."
echo;echo

echo "Default non-root user: ${USER}"
echo "Default password: ${PASSWORD}"
echo

echo "Selected wired interface: "
echo $NET
echo "All interfaces found:"
echo $ALL_NICS
echo

echo "Selected disk:"
echo $DISK1
echo

echo "Disks on system:"
lsblk -d
echo


DISK="/dev/$DISK1"

echo export USER=${USER} > environment.sh
echo export PASSWORD=${PASSWORD} >> environment.sh
echo export NET=${NET} >> environment.sh
echo export ALL_NICS=${ALL_NICS} >> environment.sh
echo export DISK1=${DISK1} >> environment.sh
echo export DISK=${DISK} >> environment.sh

chmod a+x environment.sh

START=1
ESP=$(( $START+512 ))
BIOS_BOOT=$(( $ESP+2 ))
ROOT=100%

echo
echo "Wiping Disk"

wipefs -a $DISK

echo
echo
echo "Creating Label"

parted -s ${DISK} mklabel gpt

echo
echo
echo "Partitioning"

parted -s --align=optimal ${DISK} mkpart ESP fat32 ${START}MiB ${ESP}MiB
parted -s ${DISK} set 1 esp on
parted -s --align=optimal ${DISK} mkpart BIOS_BOOT fat32 ${ESP}MiB ${BIOS_BOOT}MiB
parted -s ${DISK} set 2 bios_grub on
parted -s --align=optimal ${DISK} mkpart linux ${BIOS_BOOT}MiB 100%

parted -s ${DISK} print

echo
echo "Formatting Filesystems"


mkfs.ext4 -F ${DISK}3
mkfs.fat -F 32 ${DISK}1

mount ${DISK}3 /mnt
mkdir -p /mnt/boot/efi
mount ${DISK}1 /mnt/boot/efi

echo
echo "Pacstrapping System"

#update keys
echo "update keys"
gpg --refresh-keys
pacman-key --init && pacman-key --populate
pacman-key --refresh-keys

pacstrap -K /mnt base linux linux-firmware

echo
echo "Generating Filesystem Table"

genfstab -U /mnt >> /mnt/etc/fstab


echo
echo ${PASSWORD}
echo ${USER}
echo ${DISK}
echo
echo "Entering Chroot Environment"

mkdir /mnt/etc/slurm-llnl

cp fast_install_stage2.sh /mnt
cp environment.sh         /mnt
cp -rf /installFiles/slurm/*                /mnt/etc/slurm-llnl
cp     /usr/local/bin/apt                   /mnt/usr/bin/apt

arch-chroot /mnt /fast_install_stage2.sh

echo
echo "One Last Link"


ln -sf /run/systemd/resolve/stub-resolv.conf /mnt/etc/resolv.conf


reboot