#!/bin/bash
# Copyright 2020 Google LLC
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#    https://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
#
if ! mountpoint -q /opt; then
  OEM_DIR=/usr/share/oem
  mount -o remount,rw ${OEM_DIR}
  mkdir ${OEM_DIR}/opt
  mkdir ${OEM_DIR}/.opt_work
  # Because /opt is read-only at the time systemd boots,
  # We mount /usr/share/oem on top of /opt for now. Instead,
  # We maybe take advantage of partition 9, 10, 11 instead of
  # existing OEM parition 8, which was mounted into /usr/share/oem
  mount -o lowerdir=/opt,upperdir=${OEM_DIR}/opt,workdir=${OEM_DIR}/.opt_work \
      -t overlay overlayfs /opt ||
      logger "Cannot mount /opt overlay"
fi