function install_refspdk() {
	local last_release
	local output_dir
	local config_params
	local rootdir

	# Create a reference SPDK build for ABI tests
	git -C spdk_repo/spdk fetch --tags
	last_release=$(git -C spdk_repo/spdk tag | sort --version-sort | grep -v rc | tail -n1)
	git -C spdk_repo/spdk checkout $last_release
	git -C spdk_repo/spdk submodule update --init
	output_dir="$HOME/spdk_$(tr . _ < <(tr -d '[:alpha:]' <<< $last_release))"

	cp -r spdk_repo/spdk $output_dir

	cat > $HOME/autorun-spdk.conf <<- EOF
		SPDK_BUILD_SHARED_OBJECT=1
		SPDK_TEST_AUTOBUILD=1
		SPDK_TEST_UNITTEST=1
		SPDK_TEST_BLOCKDEV=1
		SPDK_TEST_PMDK=1
		SPDK_TEST_ISAL=1
		SPDK_TEST_REDUCE=1
		SPDK_TEST_CRYPTO=1
		SPDK_TEST_FTL=1
		SPDK_TEST_OCF=1
		SPDK_TEST_RAID5=1
		SPDK_TEST_RBD=1
		SPDK_RUN_ASAN=1
		SPDK_RUN_UBSAN=1
	EOF

	mkdir -p $HOME/output
	rootdir="$output_dir"
	source $HOME/autorun-spdk.conf
	source $output_dir/test/common/autotest_common.sh

	# Prepare separate, fixed, cmdline for the FreeBSD, Issue #1397.
	if [[ $OSID == freebsd ]]; then
		config_params="--enable-debug --enable-werror"
		config_params+=" --with-idxd --with-fio=/usr/src/fio"
		config_params+=" --disable-unit-tests --without-isal"
		MAKE=gmake
	else
		config_params="$(get_config_params)"
	fi
	$output_dir/configure $(echo $config_params | sed 's/--enable-coverage//g')
	if [[ $OSID != freebsd ]]; then
		$MAKE -C $output_dir $MAKEFLAGS include/spdk/config.h
		CONFIG_OCF_PATH="$output_dir/ocf" $MAKE -C $output_dir/lib/env_ocf $MAKEFLAGS exportlib O=$output_dir/build/ocf.a
		$output_dir/configure $config_params --with-ocf=$output_dir/build/ocf.a --with-shared
	fi
	$MAKE -C $output_dir $MAKEFLAGS
}

function install_qat() {

	install libudev-devel || install libudev-dev

	qat_tarball=$(basename $DRIVER_LOCATION_QAT)
	kernel_maj=$(uname -r | cut -d'.' -f1)
	kernel_min=$(uname -r | cut -d'.' -f2)

	sudo modprobe -r qat_c62x
	if [ -d /QAT ]; then
		sudo rm -rf /QAT/
	fi

	sudo mkdir /QAT

	wget $DRIVER_LOCATION_QAT
	sudo cp $qat_tarball /QAT/
	(cd /QAT && sudo tar zxof /QAT/$qat_tarball)

	#The driver version 1.7.l.4.3.0-00033 contains a reference to a deprecated function. Remove it so the build won't fail.
	if [ $kernel_maj -le 4 ]; then
		if [ $kernel_min -le 17 ]; then
			sudo sed -i 's/rdtscll(timestamp);/timestamp = rdtsc_ordered();/g' \
				/QAT/quickassist/utilities/osal/src/linux/kernel_space/OsalServices.c || true
		fi
	fi

	(cd /QAT && sudo ./configure --enable-icp-sriov=host && sudo make install)

	if sudo service qat_service start; then
		echo "failed to start the qat service. Something may be wrong with your device or package."
	fi
}

function install_rocksdb() {
	# Rocksdb is installed for use with the blobfs tests.
	if [ ! -d /usr/src/rocksdb ]; then
		git clone "${GIT_REPO_ROCKSDB}"
		git -C ./rocksdb checkout spdk-v5.6.1
		sudo mv rocksdb /usr/src/
	else
		sudo git -C /usr/src/rocksdb checkout spdk-v5.6.1
		echo "rocksdb already in /usr/src. Not checking out again"
	fi
}

function install_fio() {
	# This version of fio is installed in /usr/src/fio to enable
	# building the spdk fio plugin.
	local fio_version="fio-3.19"

	if [ ! -d /usr/src/fio ]; then
		if [ ! -d fio ]; then
			git clone "${GIT_REPO_FIO}"
			sudo mv fio /usr/src/
		else
			sudo mv fio /usr/src/
		fi
		(
			git -C /usr/src/fio checkout master \
				&& git -C /usr/src/fio pull \
				&& git -C /usr/src/fio checkout $fio_version \
				&& if [ $OSID == 'freebsd' ]; then
					gmake -C /usr/src/fio -j${jobs} \
						&& sudo gmake -C /usr/src/fio install
				else
					make -C /usr/src/fio -j${jobs} \
						&& sudo make -C /usr/src/fio install
				fi
		)
	else
		echo "fio already in /usr/src/fio. Not installing"
	fi
}

function install_flamegraph() {
	# Flamegraph is used when printing out timing graphs for the tests.
	if [ ! -d /usr/local/FlameGraph ]; then
		git clone "${GIT_REPO_FLAMEGRAPH}"
		mkdir -p /usr/local
		sudo mv FlameGraph /usr/local/FlameGraph
	else
		echo "flamegraph already installed. Skipping"
	fi
}

function install_qemu() {
	# Two versions of QEMU are used in the tests.
	# Stock QEMU is used for vhost. A special fork
	# is used to test OCSSDs. Install both.


	# Packaged QEMU
	install qemu-system-x86 qemu-img \
		|| install qemu-system-x86 qemu-utils \
		|| install qemu

	# Forked QEMU
	SPDK_QEMU_BRANCH=spdk-5.0.0
	mkdir -p qemu
	if [ ! -d "qemu/$SPDK_QEMU_BRANCH" ]; then
		git -C ./qemu clone "${GIT_REPO_QEMU}" -b "$SPDK_QEMU_BRANCH" "$SPDK_QEMU_BRANCH"
	else
		echo "qemu already checked out. Skipping"
	fi

	declare -a opt_params=("--prefix=/usr/local/qemu/$SPDK_QEMU_BRANCH")
	if ((gcc_version >= 9)); then
		# GCC 9 fails to compile Qemu due to some old warnings which were not detected by older versions.
		opt_params+=("--extra-cflags=-Wno-error=stringop-truncation -Wno-error=deprecated-declarations -Wno-error=incompatible-pointer-types -Wno-error=format-truncation")
		opt_params+=("--disable-glusterfs")
	fi

	# Most tsocks proxies rely on a configuration file in /etc/tsocks.conf.
	# If using tsocks, please make sure to complete this config before trying to build qemu.
	if [[ $INSTALL_TSOCKS == true ]]; then
		if hash tsocks 2> /dev/null; then
			opt_params+=("--with-git='tsocks git'")
		fi
	fi

	sed -i s@git://git.qemu.org/@https://github.com/qemu/@g qemu/$SPDK_QEMU_BRANCH/.gitmodules
	sed -i s@git://git.qemu.org/@https://github.com/qemu/@g qemu/$SPDK_QEMU_BRANCH/.git/config
	sed -i s@git://git.qemu-project.org/@https://github.com/qemu/@g qemu/$SPDK_QEMU_BRANCH/.gitmodules
	sed -i s@git://git.qemu-project.org/@https://github.com/qemu/@g qemu/$SPDK_QEMU_BRANCH/.git/config
	# The qemu configure script places several output files in the CWD.
	(cd qemu/$SPDK_QEMU_BRANCH && ./configure "${opt_params[@]}" --target-list="x86_64-softmmu" --enable-kvm --enable-linux-aio --enable-numa)

	make -C ./qemu/$SPDK_QEMU_BRANCH -j${jobs}
	sudo make -C ./qemu/$SPDK_QEMU_BRANCH install
}

function install_vpp() {
	if [ -d /usr/local/src/vpp ]; then
		echo "vpp already cloned."
		if [ ! -d /usr/local/src/vpp/build-root ]; then
			echo "build-root has not been done"
			echo "remove the $(pwd) and start again"
			exit 1
		fi
	else
		git clone "${GIT_REPO_VPP}"
		git -C ./vpp checkout v19.04.2

		if [ "${OSID}" == 'fedora' ]; then
			if [ ${OSVERSION} -eq 29 ]; then
				git -C ./vpp apply ${VM_SETUP_PATH}/patch/vpp/fedora29-fix.patch
			fi
			if [ ${OSVERSION} -eq 30 ]; then
				git -C ./vpp apply ${VM_SETUP_PATH}/patch/vpp/fedora30-fix.patch
			fi
		fi

		# Installing required dependencies for building VPP
		yes | make -C ./vpp install-dep

		make -C ./vpp build -j${jobs}

		sudo mv ./vpp /usr/local/src/vpp-19.04
	fi
}

function install_nvmecli() {
	SPDK_NVME_CLI_BRANCH=spdk-1.6
	if [ ! -d nvme-cli ]; then
		git clone "${GIT_REPO_SPDK_NVME_CLI}" -b "$SPDK_NVME_CLI_BRANCH"
	else
		echo "nvme-cli already checked out. Skipping"
	fi
	if [ ! -d "/usr/local/src/nvme-cli" ]; then
		# Changes required for SPDK are already merged on top of
		# nvme-cli, however not released yet.
		# Support for SPDK should be released in nvme-cli >1.11.1
		git clone "https://github.com/linux-nvme/nvme-cli.git" "nvme-cli-cuse"
		git -C ./nvme-cli-cuse checkout "e770466615096a6d41f038a28819b00bc3078e1d"
		make -C ./nvme-cli-cuse
		sudo mv ./nvme-cli-cuse /usr/local/src/nvme-cli
	fi
}

function install_libiscsi() {
	# We currently don't make any changes to the libiscsi repository for our tests, but it is possible that we will need
	# to later. Cloning from git is just future proofing the machines.
	if [ ! -d libiscsi ]; then
		git clone "${GIT_REPO_LIBISCSI}"
	else
		echo "libiscsi already checked out. Skipping"
	fi
	(cd libiscsi && ./autogen.sh && ./configure --prefix=/usr/local/libiscsi)
	make -C ./libiscsi -j${jobs}
	sudo make -C ./libiscsi install
}

function install_git() {
	install zlib-devel curl-devel
	tar -xzof <(wget -qO- "$GIT_REPO_GIT")
	(cd git-${GIT_VERSION} \
		&& make configure \
		&& ./configure --prefix=/usr/local/git \
		&& sudo make -j${jobs} install)
	sudo sh -c "echo 'export PATH=/usr/local/git/bin:$PATH' >> /etc/bashrc"
	exec $SHELL
}

GIT_VERSION=2.25.1
: ${GIT_REPO_SPDK=https://github.com/spdk/spdk.git}
export GIT_REPO_SPDK
: ${GIT_REPO_DPDK=https://github.com/spdk/dpdk.git}
export GIT_REPO_DPDK
: ${GIT_REPO_ROCKSDB=https://review.spdk.io/spdk/rocksdb}
export GIT_REPO_ROCKSDB
: ${GIT_REPO_FIO=http://git.kernel.dk/fio.git}
export GIT_REPO_FIO
: ${GIT_REPO_FLAMEGRAPH=https://github.com/brendangregg/FlameGraph.git}
export GIT_REPO_FLAMEGRAPH
: ${GIT_REPO_QEMU=https://github.com/spdk/qemu}
export GIT_REPO_QEMU
: ${GIT_REPO_VPP=https://gerrit.fd.io/r/vpp}
export GIT_REPO_VPP
: ${GIT_REPO_LIBISCSI=https://github.com/sahlberg/libiscsi}
export GIT_REPO_LIBISCSI
: ${GIT_REPO_SPDK_NVME_CLI=https://github.com/spdk/nvme-cli}
export GIT_REPO_SPDK_NVME_CLI
: ${GIT_REPO_INTEL_IPSEC_MB=https://github.com/spdk/intel-ipsec-mb.git}
export GIT_REPO_INTEL_IPSEC_MB
: ${DRIVER_LOCATION_QAT=https://01.org/sites/default/files/downloads//qat1.7.l.4.9.0-00008.tar.gz}
export DRIVER_LOCATION_QAT
: ${GIT_REPO_GIT=https://github.com/git/git/archive/v${GIT_VERSION}.tar.gz}
export GIT_REPO_GIT

if [[ $ID == centos ]] && (( VERSION_ID == 7 )); then
	# install proper version of the git first
	install_git
fi

IFS="," read -ra conf_env <<< "$CONF"
for conf in "${conf_env[@]}"; do
	export "INSTALL_${conf^^}=true"
done
sources=(install_refspdk)

if [[ $OS == FreeBSD ]]; then
	jobs=$(($(sysctl -n hw.ncpu) * 2))
else
	jobs=$(($(nproc) * 2))
	sources+=(
		install_libiscsi
		install_vpp
		install_nvmecli
		install_qat
		install_rocksdb
		install_flamegraph
		install_qemu
	)
fi
sources+=(install_fio)

sudo mkdir -p /usr/{,local}/src

for source in "${sources[@]}"; do
	source_conf=${source^^}
	if [[ ${!source_conf} == true ]]; then
		"$source" &
	fi
done
wait