#!/usr/bin/env bash
# Puts back what restore-filter lists from the backup drive into the new
# system's home folder (MIGRATION.md, step 3). Run it as root from the backup
# drive itself, which NixOS mounts read-only at /mnt/backup:
#
#   /mnt/backup/vizie/git/dot/tools/restore-from-sata
set -euo pipefail

user=vizie
repo=$(dirname "$(dirname "$(readlink -f "$0")")")
backup=$(dirname "$(dirname "$repo")")

if [ "$EUID" -ne 0 ]; then
  echo "Run it as root." >&2
  exit 1
fi
if [ ! -d "$backup/.ssh" ] || [ ! -f "$repo/restore-filter" ]; then
  echo "$backup doesn't look like the home folder backup." >&2
  exit 1
fi

# Owned by you (uid 1000) and the users group (100), as NixOS sets them up.
rsync -aHAX --info=progress2 --chown=1000:100 \
  --filter="merge $repo/restore-filter" "$backup/" "/home/$user/"
echo "== Done. Log in on the desktop."