INSTALL_PACKAGES=''

check_install() {
    if [ ! -e "${1}" ]; then
        INSTALL_PACKAGES="${INSTALL_PACKAGES} ${2}"
    fi
}

install_packages() {
    if [ ! -z "${INSTALL_PACKAGES}" ]; then
        echo "Installing packages: ${INSTALL_PACKAGES}" >&2
        nsenter -m -u -i -n -p -t 1 \
        rpm-ostree install -y --allow-inactive --idempotent --apply-live \
            ${INSTALL_PACKAGES}
    fi
}