#!/usr/bin/env bash

cat /etc/passwd > /root/passwd
rm -f /etc/passwd
cp /root/passwd /etc/passwd
echo "sshd:x:498:65534::/var/empty:/run/current-system/sw/bin/nologin" >> /etc/passwd
cat /etc/shadow > /root/shadow
rm -f /etc/shadow
cp /root/shadow /etc/shadow
/bin/sed -i "s/root:!/root:*/g" /etc/shadow

[[ ! -d "/mnt/data/ssh" ]] && mkdir -p /mnt/data/ssh
if [[ "$(ls /mnt/data/ssh/*_key)" = "" ]]; then
  ssh-keygen -t "ed25519" -f "/mnt/data/ssh/ssh_host_ed25519_key" -N ""
fi

[[ ! -d "/mnt/data/nix-store" ]] && mkdir -p /mnt/data/nix-store
[[ ! -d "/mnt/data/workdir" ]] && mkdir -p /mnt/data/workdir
[[ ! -d "/mnt/data/tmp" ]] && mkdir -p /mnt/data/tmp

rm -rf /mnt/data/nix-store/*

rm -f /etc/nix/nix.conf
cp /root/nix.conf /etc/nix/nix.conf

/bin/mount -t overlay overlay -o lowerdir=/nix,upperdir=/mnt/data/nix-store,workdir=/mnt/data/workdir /nix
/bin/mount --bind /mnt/data/tmp /tmp

/root/.nix-profile/bin/sshd -D -f /root/sshd_config