#!/bin/bash

#    linux-deployment-scripts
#    Copyright (C) 2024  VM-Experiments
#
#    This program is free software: you can redistribute it and/or modify
#    it under the terms of the GNU General Public License as published by
#    the Free Software Foundation, either version 3 of the License, or
#    (at your option) any later version.
#
#    This program is distributed in the hope that it will be useful,
#    but WITHOUT ANY WARRANTY; without even the implied warranty of
#    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
#    GNU General Public License for more details.
#
#    You should have received a copy of the GNU General Public License
#    along with this program.  If not, see <https://www.gnu.org/licenses/>.

trap '' SIGINT SIGTERM

parted -s /dev/sda mklabel msdos
parted -s /dev/sda mkpart primary linux-swap 0% 2GiB
parted -s /dev/sda mkpart primary ext4 2GiB 100%

mkswap /dev/sda1
mkfs.ext4 /dev/sda2

mount /dev/sda2 /mnt
swapon /dev/sda1

tar -xzvf /rootfs.tar.gz -C /mnt

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

mount --bind /dev /mnt/dev
mount --bind /proc /mnt/proc
mount --bind /sys /mnt/sys

if command -v grub2-mkconfig &>/dev/null; then
    chroot /mnt /bin/bash -c "grub2-mkconfig -o /boot/grub/grub.cfg"
elif command -v grub-mkconfig &>/dev/null; then
    chroot /mnt /bin/bash -c "grub-mkconfig -o /boot/grub/grub.cfg"
fi

if command -v grub2-install &>/dev/null; then
    chroot /mnt /bin/bash -c "grub2-install /dev/sda"
elif command -v grub-install &>/dev/null; then
    chroot /mnt /bin/bash -c "grub-install /dev/sda"
fi

while true; do
    read -p "Enter a username (lowercase letters, digits, underscores and hyphens): " username
    chroot /mnt /bin/bash -c "useradd -m '$username'"

    if [ $? -eq 0 ]; then
        break
    fi
done

while true; do
    chroot /mnt /bin/bash -c "passwd '$username'"

    if [ $? -eq 0 ]; then
        break
    fi
done

while true; do
    read -p "Enter the hostname: " hostname
    chroot /mnt /bin/bash -c "echo $hostname > /etc/hostname"

    if [ $? -eq 0 ]; then
        break
    fi
done