#!/usr/bin/env bash

# TODO: assert correct system

NSPAWN=nixos-@hostname@

TARBALL=./"$NSPAWN".tar #"https://github.com/tfc/nspawn-nixos/releases/download/v1.0/nixos-system-x86_64-linux.tar.xz"

test $(id -u) -eq 0 || {
  >&2 echo you must run this as root
  exit 1
}

install_pkg() {
  # TODO: use bash hashmaps to map from apt to other package managers
  # * [x] apt
  # * [ ] apk
  # * [ ] pacman
  # * [ ] dnf
  DEBIAN_FRONTEND=noninteractive apt install -y "$@"
}


if ! >/dev/null command -v systemd-nspawn; then
  # TODO: support more than ubuntu
  install_pkg systemd-container
fi

machinectl remove "$NSPAWN" || true # TODO: interactive?
#machinectl pull-tar "$TARBALL" "$NSPAWN" --verify=no
machinectl import-tar "$TARBALL" "$NSPAWN"

# use host network
cat <<"EOF" > /etc/systemd/nspawn/"$NSPAWN".nspawn
[Network]
VirtualEthernet=no
EOF

machinectl enable "$NSPAWN"
machinectl start "$NSPAWN"
echo Setting root password...
machinectl shell "$NSPAWN" /usr/bin/env passwd

machinectl status "$NSPAWN"