#!/usr/bin/env bash

set -o errexit
set -o errtrace
set -o nounset

debug=echo

if [ "x" == "x$2" ]
then
  echo "usage: $0 <ip> <host>"
  exit 1
fi

nixanywhere=~/src/nixos/nixos-anywhere-examples
nixsrc=~/src/nixos/duckland
ip="${1}"
host="${2}"

if [ ! -f "${nixsrc}/hosts/${host}/default.nix" ]
then
  echo "Please set  up ${nixsrc}/hosts/${host}/default.nix before running"
  exit 1
fi

cd "${nixanywhere}"
${debug} ssh-keygen -R "${ip}"
${debug} nix run github:nix-community/nixos-anywhere -- --flake .#${host} root@"${ip}"
cd "${nixsrc}"
${debug} ssh-keygen -R "${ip}" 
${debug} ssh root@"${ip}" nixos-generate-config 
${debug} scp root@"${ip}":/etc/nixos/hardware-configuration.nix hosts/${host}/hardware-configuration.nix 
${debug} git add hosts/${host}/hardware-configuration.nix 
${debug} nixos-rebuild switch --flake .#${host} --target-host "root@"${ip}""