#!/usr/bin/env bash

set -euo pipefail

# This script will:
# - Look for external storage devices
# - Check if they contain an Umbrel install
# - If yes
# - - Unmount it

UMBREL_ROOT="$(readlink -f $(dirname "${BASH_SOURCE[0]}")/../../..)"
MOUNT_POINT="/mnt/data"
EXTERNAL_UMBREL_ROOT="${MOUNT_POINT}/umbrel"

check_root () {
  if [[ $UID != 0 ]]; then
    echo "This script must be run as root"
    exit 1
  fi
}

check_dependencies () {
  for cmd in "$@"; do
    if ! command -v $cmd >/dev/null 2>&1; then
      echo "This script requires \"${cmd}\" to be installed"
      exit 1
    fi
  done
}

check_root
check_dependencies sync umount

if [[ ! -f "${EXTERNAL_UMBREL_ROOT}"/.umbrel ]]; then
  echo "No external storage with Umbrel install found..."
  exit 1
fi

echo "Unmounting external storage..."
echo "Removing bind mount..."
umount --lazy "${UMBREL_ROOT}"
echo "Unmounting partition..."
umount --lazy "${MOUNT_POINT}"
sync
sleep 1