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#!/bin/bash -e
# Copyright 2019 Google Inc. 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.
# Script to extract and repack an archive with specified object files.
# Inputs:
# Environment:
# CLANG_BIN: path to the clang bin directory
# Arguments:
# -i ${file}: input file
# -o ${file}: output file
# -d ${file}: deps file
set -o pipefail
OPTSTRING=d:i:o:
usage() {
cat <<EOF
Usage: archive_repack.sh [options] <objects to repack>
OPTIONS:
-i <file>: input file
-o <file>: output file
-d <file>: deps file
EOF
exit 1
}
while getopts $OPTSTRING opt; do
case "$opt" in
d) depsfile="${OPTARG}" ;;
i) infile="${OPTARG}" ;;
o) outfile="${OPTARG}" ;;
?) usage ;;
esac
done
shift "$(($OPTIND -1))"
if [ -z "${infile}" ]; then
echo "-i argument is required"
usage
fi
if [ -z "${outfile}" ]; then
echo "-o argument is required"
usage
fi
# Produce deps file
if [ ! -z "${depsfile}" ]; then
cat <<EOF > "${depsfile}"
${outfile}: ${infile} ${CLANG_BIN}/llvm-ar
EOF
fi
# Get absolute path for outfile and llvm-ar.
LLVM_AR="${PWD}/${CLANG_BIN}/llvm-ar"
if [[ "$outfile" != /* ]]; then
outfile="${PWD}/${outfile}"
fi
tempdir="${outfile}.tmp"
# Clean up any previous temporary files.
rm -f "${outfile}"
rm -rf "${tempdir}"
# Do repack
# We have to change working directory since ar only allows extracting to CWD.
mkdir "${tempdir}"
cp "${infile}" "${tempdir}/archive"
cd "${tempdir}"
"${LLVM_AR}" x "archive"
"${LLVM_AR}" --format=gnu qc "${outfile}" "$@"
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