#!/bin/sh -eux

mkdir -p "$1"

ROOT="$(readlink -f $1)"
SYSTEM="$(readlink -f ${2:-./result})"

# create root folders
mkdir -p "$ROOT/etc" "$ROOT/boot"

# install NixOS
nix-env --store "$ROOT" \
  --extra-substituters "auto?trusted=1" \
  -p "$ROOT/nix/var/nix/profiles/system" --set "$SYSTEM"

# activate NixOS
touch "$ROOT/etc/NIXOS"
nixos-enter --root "$ROOT" \
  -- /run/current-system/bin/switch-to-configuration boot