#!/bin/bash
set -e
set -o pipefail

cd $(dirname $0)/..

source scripts/version

BUILD=$(pwd)/build
IMAGE_CACHE=${BUILD}/image-cache
PREPOP_DIR=${IMAGE_CACHE}/var/lib/system-docker
INITRD_DIR=${BUILD}/initrd
ARTIFACTS=$(pwd)/dist/artifacts
INITRD=${ARTIFACTS}/initrd

mkdir -p ${ARTIFACTS} ${PREPOP_DIR}

if [ "$(docker info | grep 'Storage Driver: ' | sed 's/Storage Driver: //')" != "overlay" ]; then
    echo Overlay storage driver is require do create rootfs.tar 1>&2
    exit 1
fi

DFS=$(docker run -d --privileged -v /lib/modules/$(uname -r):/lib/modules/$(uname -r) ${DFS_IMAGE}${SUFFIX} ${DFS_ARGS})
trap "docker rm -fv ${DFS_ARCH} ${DFS}" EXIT
docker exec -i ${DFS} docker load < ${INITRD_DIR}/usr/share/ros/images.tar
docker stop ${DFS}
docker run --rm --volumes-from=${DFS} rancher/os-base tar -c -C /var/lib/docker ./image | tar -x -C ${PREPOP_DIR}
docker run --rm --volumes-from=${DFS} rancher/os-base tar -c -C /var/lib/docker ./overlay | tar -x -C ${PREPOP_DIR}

tar -cf ${ARTIFACTS}/rootfs.tar  --exclude lib/modules --exclude lib/firmware -C ${INITRD_DIR} .
tar -rf ${ARTIFACTS}/rootfs.tar  --exclude lib/modules --exclude lib/firmware -C ${INITRD_DIR} .
rm -f ${ARTIFACTS}/rootfs.tar.gz
gzip ${ARTIFACTS}/rootfs.tar