# shellcheck shell=bash

# shellcheck disable=SC2154
echo "Starting impermanence mount with source: $source, target: $target, path: $path, create: $create"

source_current="$source"
target_current="$target"

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

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

  if [[ -e "$source_current" ]]; then
    read -r mode owner group <<< "$(stat -c '%a %u %g' "$source_current")"

    if [[ -d "$source_current" ]]; then
      install -d -m "$mode" -o "$owner" -g "$group" "$target_current"
      continue
    fi

    if [[ "$part" != "$leaf" ]]; then
      echo "Error: $source_current is not a directory, persistence for $path can not be applied."
      exit 1
    fi

    install -m "$mode" -o "$owner" -g "$group" /dev/null "$target_current"
  fi

  if [[ "$create" == "none" ]]; then
    break
  fi

  if [[ -e "$target_current" ]]; then
    template="$target_current"
  else
    template="${source_current%/*}"
  fi

  read -r mode owner group <<< "$(stat -c '%a %u %g' "$template")"

  if [[ "$part" == "$leaf" && "$create" == "file" ]]; then
    install -m "$mode" -o "$owner" -g "$group" /dev/null "$source_current"
  else
    install -d -m "$mode" -o "$owner" -g "$group" "$source_current"
  fi
done