echo "Stopping impermanence mount with source: ${source}, target: ${target}, path: ${path}."

source_current="${source}"
target_current="${target}"

IFS='/' read -ra path_parts <<< "${path}"
unset "path_parts[-1]"

for part in "${path_parts[@]}"; do
  source_current="${source_current}/${part}"
  target_current="${target_current}/${part}"

  if [[ ! -d "${target_current}" ]]; then
    break
  fi

  if [[ -d "${source_current}" ]]; then
    continue
  fi

  read -r mode owner group <<< "$(stat -c '%a %u %g' "${target_current}")"
  install -d -m "${mode}" -o "${owner}" -g "${group}" "${source_current}"
done

source=$(realpath -m "${source}/${path}")
target=$(realpath -m "${target}/${path}")

if [[ ! -e "${target}" ]] || { [[ -d "${target}" ]] && [[ -z "$(ls -A "${target}")" ]]; } || { [[ -f "${target}" ]] && [[ ! -s "${target}" ]]; }; then
  exit 0
fi

if [[ -e "${source}" ]]; then
  >&2 echo "Error: Source ${source} already exists. Cannot move ${target} to ${source}."
  exit 1
fi

echo "Moving target ${target} to source ${source}."
mv "${target}" "${source}"