#!/bin/bash

set -e

# Architecture
ARCH=amd64

# Linux release
RELEASE=bionic

# Partition labels
PARTITION_NAME=dave
PARTITION_SEC_NAME=davesecure

############################
# END OF USER CONFIG OPTIONS
############################

# Partition numbers
PARTBOOT=1
PART1=2
PART2=3

function chroot_run {
    chroot $MNTUSB /bin/bash -c "$@"
}

function prted {
	parted -s $DEVICE $@
}

lsblk

read -p 'Device? (ex: /dev/sdb): ' DEVICE

# Create partitions
prted $DEVICE mklabel gpt
prted mkpart ESP fat32 1MiB 512MiB
prted name 1 EFI
prted set 1 esp on
prted mkpart primary ext4 512MiB 10000MiB
prted name 2 LINUX
prted set 2 msftdata on
prted mkpart primary ext4 10000MiB 100%

sync

mkfs.ext4 -F $DEVICE$PART1 -L $NAME
mkfs.vfat -F 32 $DEVICE$PARTBOOT

# Mount everything
if [ ! -d $MNTUSB ]
then
	mkdir $MNTUSB
fi

mount $DEVICE$PART1 $MNTUSB
mkdir -p $MNTUSB/efi
mount $DEVICE$PARTBOOT $MNTUSB/efi

# Install
debootstrap --arch $ARCH $RELEASE $MNTUSB

mount -t proc none $MNTUSB/proc
mount --bind /sys $MNTUSB/sys
mount --bind /dev $MNTUSB/dev

chroot_run "echo ${HOSTNAME} > /etc/hostname"
chroot_run "apt-get install -y --allow-unauthenticated locales"
chroot_run "dpkg-reconfigure locales"
chroot_run "apt-get install -y --allow-unauthenticated net-tools vim linux-base linux-image-amd64 cryptsetup util-linux parted build-essential grub-efi-amd64"
chroot_run "dpkg-reconfigure tzdata"