#!/usr/bin/env bash
# Copyright 2019 The Hafnium Authors.
#
# Use of this source code is governed by a BSD-style
# license that can be found in the LICENSE file or at
# https://opensource.org/licenses/BSD-3-Clause.

set -euxo pipefail

SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
SCRIPT_PATH="${SCRIPT_DIR}/$(basename "${BASH_SOURCE[0]}")"
ROOT_DIR="$(realpath ${SCRIPT_DIR}/..)"

if [ "${HAFNIUM_HERMETIC_BUILD:-}" == "true" ]
then
	exec "${ROOT_DIR}/build/run_in_container.sh" -p ${SCRIPT_PATH} $@
fi

if [ $# != 1 ]
then
	echo "Usage: $0 <output_file>" 1>&2
	exit 1
fi

MAKE="$(which make)"
STRACE="$(which strace)"

# Set up a temp directory and register a cleanup function on exit.
TMP_DIR="$(mktemp -d)"
function cleanup() {
	rm -rf "${TMP_DIR}"
}
trap cleanup EXIT

STRACE_LOG="${TMP_DIR}/strace.log"

echo "Building with strace"
pushd ${ROOT_DIR}
${MAKE} clobber
${STRACE} \
	-o "${STRACE_LOG}" \
	-f \
	-qq \
	-e trace=%file,chdir,%process \
	${MAKE}
popd

echo "Processing strace output"
"${SCRIPT_DIR}/parse_strace_open.py" ${ROOT_DIR} < "${STRACE_LOG}" > "$1"