#! /bin/sh
set -e
SNAPSHOTS="/.snapshots"
if [ "x${SUSE_BTRFS_SNAPSHOT_BOOTING}" = "xtrue" ] &&
   [ "x${GRUB_FS}" = "xbtrfs" ] && 
   [ -d "${SNAPSHOTS}" ]; then
  SNAPSHOT_RID=`btrfs inspect-internal rootid ${SNAPSHOTS}`
  ROOT_RID=`btrfs inspect-internal rootid /`
  if [ -n "${SNAPSHOT_RID}" -a "${SNAPSHOT_RID}" != "${ROOT_RID}" ]; then
    SNAPSHOT_SUBVOL=`btrfs inspect-internal subvolid-resolve ${SNAPSHOT_RID} /`
    ROOT_SUBVOL=`btrfs inspect-internal subvolid-resolve ${ROOT_RID} /`
    INODE=`stat -c '%i' ${SNAPSHOTS}`
    if [ "x${INODE}" = "x256" -a "x${ROOT_SUBVOL}${SNAPSHOTS}" != "x${SNAPSHOT_SUBVOL}" ]; then
      echo "btrfs-mount-subvol (\$root) ${SNAPSHOTS} ${SNAPSHOT_SUBVOL}"
    fi
  fi
    cat <<EOF
if [ -f "${SNAPSHOTS}/grub-snapshot.cfg" ]; then
  source "${SNAPSHOTS}/grub-snapshot.cfg"
fi
EOF
fi