#!/usr/bin/env bash

set -o errexit

if [[ ! -v 1 ]]; then
    echo "please supply a name for the new machine"
    exit 1
fi

modprobe vfat
modprobe nls_cp437
modprobe nls_iso8859_1

for i in `seq 0 1`; do
    dev=/dev/nvme${i}n1

    sfdisk $dev << EOF
    label: gpt
    label-id: 591FD8E0-4CDB-4F4F-A59E-AC8D9D129CF1
    device: /dev/nvme0n1
    unit: sectors
    first-lba: 2048
    last-lba: 7501476494
    sector-size: 512

    /dev/nvme0n1p1 : start=        2048, size=     2097152, type=C12A7328-F81F-11D2-BA4B-00A0C93EC93B, uuid=5F5806A4-0D71-E84E-80F2-E0C4BDB45368
    /dev/nvme0n1p2 : start=     2099200, size=    33554432, type=0657FD6D-A4AB-43C4-84E5-0933C84B4F4F, uuid=F4C86757-DC77-6947-AAB7-7D8D61B72A41
    /dev/nvme0n1p3 : start=    35653632, size=  7465822208, type=A19D880F-05FC-4D3B-A006-743F0F84911E, uuid=D3C2B7ED-DED3-354B-880D-018B4D00829F
EOF

    sleep 1
    mkswap -L swap${i} ${dev}p2
#    swapon ${dev}p2
done

mdadm --create --force -n2 -l0 /dev/md0 /dev/nvme0n1p3 /dev/nvme1n1p3
mkfs.xfs -f -L root /dev/md0
mount /dev/md0 /mnt

mkdir -p /mnt/boot
mkfs.fat -F 32 -n boot /dev/nvme0n1p1
mount -o umask=077 /dev/disk/by-label/boot /mnt/boot

mkdir -p inst /mnt/nix /mnt/etc/nixos

cp configuration.nix /mnt/etc/nixos

# Replace host name.
sed -i 's/  networking.hostName = "nixos";/ networking.hostName = "'$1'";/' /mnt/etc/nixos/configuration.nix

cd /mnt
mkdir -p etc dev mnt proc sys
cp /etc/resolv.conf etc

for fn in dev proc sys; do mount --bind "/${fn}" "${fn}"; done

curl -L https://nixos.org/nix/install | sh -s -- --daemon
. $HOME/.nix-profile/etc/profile.d/nix.sh
nix-channel --add https://nixos.org/channels/nixos-24.05 nixpkgs
nix-channel --update

nix-env -f '<nixpkgs>' -iA nixos-install-tools
nixos-install --no-root-password