#!/usr/bin/env bash
# Copyright Amazon.com Inc. or its affiliates. All Rights Reserved.
#
# 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
#
#      http://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.


set -eE
set -o nounset
set -o pipefail

echo "Validating all symlinks are valid"

if [[ "${IGNORE_DANGLING_SYMLINKS:-false}" = "true" ]]; then
    exit 0
fi

cd /newroot 

EXPECTED_DANGLING_LINKS=("/var/lock" "/etc/mtab")

GREPS=""
for expected in "${EXPECTED_DANGLING_LINKS[@]}"; do
    GREPS+="-e $expected "
done

DANGLING="$(symlinks -C -r . | grep "dangling" | grep -v $GREPS || true)"

if [ ! -z "$(echo $DANGLING | xargs)" ]; then
    echo "$DANGLING"
    exit 1
fi