#!/bin/bash -u
# Copyright 2020 Google Inc.
#
# 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.
#
################################################################################

# Wrapper around bad_build_check that moves the /out directory to /tmp/not-out.
# This is useful when bad_build_check isn't called from test_all which does the
# same thing.

function main {
  # Move the directory the fuzzer is located in to somewhere that doesn't exist
  # on the builder to make it more likely that hardcoding /out fails here (since
  # it will fail on ClusterFuzz).
  local fuzzer=$1
  fuzzer=$(realpath $fuzzer)
  local initial_fuzzer_dir=$(dirname $fuzzer)

  local tmp_fuzzer_dir=/tmp/not-out
  rm -rf $tmp_fuzzer_dir
  mkdir $tmp_fuzzer_dir
  # Move the contents of $initial_fuzzer_dir rather than the directory itself in
  # case it is a mount.
  mv $initial_fuzzer_dir/* $tmp_fuzzer_dir
  fuzzer="$tmp_fuzzer_dir/$(basename $fuzzer)"

  # Change OUT to the temporary fuzzer dir.
  local initial_out=$OUT
  export OUT=$tmp_fuzzer_dir

  bad_build_check $fuzzer
  returncode=$?

  # Restore OUT and $initial_fuzzer_dir
  export OUT=$initial_out
  mv $tmp_fuzzer_dir/* $initial_fuzzer_dir

  return $returncode
}

if [ $# -ne 1 ]; then
  echo "Usage: $0 <fuzz_target_binary>"
  exit 1
fi

main $1
exit $?