installer

#!/bin/bash

block_device=/dev/sda
pool_name=tnewman
release=disco
country=tw

apt update
apt install -y zfsutils-linux debootstrap

modprobe zfs
lsmod | grep zfs

# no substitution needed here
cat > /etc/udev/rules.d/90-zfs.rules << 'EOF'
KERNEL=="sd*[!0-9]", IMPORT{parent}=="ID_*", SYMLINK+="$env{ID_BUS}-$env{ID_SERIAL}"
KERNEL=="sd*[0-9]", IMPORT{parent}=="ID_*", SYMLINK+="$env{ID_BUS}-$env{ID_SERIAL}-part%n"
EOF

udevadm trigger

wipefs -a $block_device
sgdisk -Z -n9:-8M:0 -t9:bf07 -c9:Reserved -n2:-8M:0 -t2:ef02 -c2:GRUB -n1:0:0 -t1:bf01 -c1:ZFS $block_device
sgdisk -p $block_device

zpool create -f -m none -o ashift=12 -O compression=lz4 $pool_name ${block_device}1
zpool status -v

zfs create -o mountpoint=/ $pool_name/root
zfs create -o mountpoint=/home $pool_name/home
zfs list

zpool export $pool_name
zpool import -d /dev/disk/by-id -R /mnt $pool_name

debootstrap $release /mnt

cp {,/mnt}/etc/udev/rules.d/90-zfs.rules

cat > /mnt/etc/apt/sources.list << EOF
###### Ubuntu Main Repos
deb http://${country}.archive.ubuntu.com/ubuntu/ disco main restricted universe multiverse

###### Ubuntu Update Repos
deb http://${country}.archive.ubuntu.com/ubuntu/ ${release}-security main restricted universe multiverse
deb http://${country}.archive.ubuntu.com/ubuntu/ ${release}-updates main restricted universe multiverse
deb http://${country}.archive.ubuntu.com/ubuntu/ ${release}-proposed main restricted universe multiverse
deb http://${country}.archive.ubuntu.com/ubuntu/ ${release}-backports main restricted universe multiverse
EOF

mount --rbind {,/mnt}/dev
mount --rbind {,/mnt}/proc
mount --rbind {,/mnt}/sys

cat > /mnt/chrootscript << EOF
apt update
locale-gen en_US.UTF-8
apt install -y zfsutils-linux zfs-initramfs zfs-dkms zfs-zed \
               linux-image-generic linux-headers-generic \
	       grub2-common grub-pc \
	       acpi-support neovim ifupdown
find /boot -iname '*zfs*'
passwd root
exit
EOF
chmod +x /mnt/chrootscript

chroot /mnt /chrootscript

grub-probe /mnt

grub-install --root-directory=/mnt $block_device

shutdown -rf now