#!/usr/bin/env bash
set -eux

readonly DISK="/dev/vda"
readonly BOOT="${DISK}2"
readonly ROOT="${DISK}3"

# Wipe the target disk of all partitions and filesystems
sgdisk --zap-all "${DISK}"
dd if=/dev/zero of="${DISK}" bs=512 count=2048
wipefs --all "${DISK}"

# Create /boot (512M) and / (100%)
sgdisk --new=1:0:+1M --typecode=0:ef02 --change-name=0:bios "${DISK}"
sgdisk --new=2:0:+512M --typecode=0:8300 --change-name=0:boot --attributes=0:set:1 "${DISK}"
sgdisk --new=3:0:0 --typecode=0:8300 --change-name=0:root "${DISK}"

mkfs.ext4 -e remount-ro -q -L boot ${BOOT}
mkfs.ext4 -e remount-ro -q ${ROOT}

mount -o noatime "${ROOT}" /mnt
mkdir -p /mnt/boot
mount -o noatime "${BOOT}" /mnt/boot