: "${XDG_CACHE_HOME:=$HOME/.cache}"
declare -A direnv_layout_dirs
function direnv_layout_dir() {
  local hash path
  echo "${direnv_layout_dirs[$PWD]:=$(
    hash="$(sha1sum - <<<"$PWD" | head -c40)"
    path="${PWD//[^a-zA-Z0-9]/-}"
    echo "${XDG_CACHE_HOME}/direnv/layouts/${hash}${path}"
  )}"
}