nvidia-all/system/nvidia-tkg.install

_depmod() {
    # Update module dependencies for all kernels
    local -a _kernels
    mapfile -t _kernels < <(find /usr/lib/modules/*/build/version -exec cat {} +)
    for _kernel in "${_kernels[@]}"; do
        depmod $_kernel
    done
}

_rmmod() {
    # Try unloading
    if lsmod | grep -q nvidia; then
        rmmod nvidia
    fi

    # What?
    if [[ $? != 0 ]]; then
        # X running?
        if pidof Xorg >/dev/null; then
            echo ":: Please reboot or exit X first."
        fi
    fi
}

post_install() {
    _depmod

    # X running?
    if pidof Xorg >/dev/null; then
        echo ":: Please reboot or exit X to unload the current module."
    fi
    echo ""
    echo -e "\e[31m###########################################################\e[0m"
    echo ""
    echo -e "\e[31m It is recommended to run mkinitcpio -P after installation\e[0m"
    echo ""
    echo -e "\e[31m###########################################################\e[0m"
    echo ""
}

post_upgrade() {
    _depmod

    # Not rebuilding?
    if (( $(vercmp $1 $2) != 0 )); then
        _rmmod
    fi
}

post_remove() {
    _depmod

    _rmmod
}