fetch_source() {
	mkdir -p src 2>/dev/null
	cd src || perror "Could not change into src directory."
	download "$REQUIRED_URL"
}

build() {
	local ROOTUPPERDIR="$MODULE_DIR/rootupper"

	local NVIDIA="$MODULE_WORK_DIR/src/$REQUIRED_NVIDIA"
	local NVIDIAEXTRACTDIR="$ROOTUPPERDIR/NVIDIA"

	[ -d "$NVIDIAEXTRACTDIR" ] && rm -rf "$NVIDIAEXTRACTDIR"
	pinfo "Unpacking NVidia archive ($NVIDIA) ..."
	sh "$NVIDIA" --extract-only --target "$NVIDIAEXTRACTDIR" ||	perror "Could not extract $NVIDIA to $NVIDIAEXTRACTDIR."

	pinfo "Ready to chroot - compiling may take some time."
	pdebug "--- chroot ---------------------------------------------------------------------"
	pdebug "-                                                                              -"
	pdebug "-   Notice: This may take a while!                                             -"
	pdebug "-                                                                              -"
	pdebug "-      Please keep note the Nvidia installer _will_ complain about             -"
	pdebug "-      several warnings and errors. It will do this in any case.               -"
	pdebug "-                                                                              -"
	pdebug "-      This does _not_ mean the kernel module compilation was unsuccessful!    -"
	pdebug "-                                                                              -"
	pdebug "--------------------------------------------------------------------------------"

	
	chroot_run "$ROOTUPPERDIR" <<-EOF
	/NVIDIA/nvidia-installer --no-nouveau-check --no-network --no-backup --no-rpms --no-runlevel-check --no-distro-scripts --no-cc-version-check --no-x-check --no-precompiled-interface --silent --kernel-source-path /"$KERNEL_HEADERS_DIR"	# Do the work!
	# fake success since the installer will exit with an error due to the module not loading properly.
	exit 0
	EOF
	pinfo "chroot terminated."

	local file
	local RESULT
	local NVIDIA_MODULES="$MODULE_BUILD_DIR/lib/modules/nvidia/"
	mkdir -p "$NVIDIA_MODULES"
	pinfo "Copying kernel modules..."
	for file in nvidia.ko nvidia-uvm.ko nvidia-modeset.ko nvidia-drm.ko; do
		RESULT=$(find "$ROOTUPPERDIR/NVIDIA/kernel" -name "$file" | head -n 1)
		[ -z "$RESULT" ] && perror "Could not find built module $file in ./NVIDIA/kernel"
		pinfo "Fetching ${file}..."
		strip -g "$RESULT" || pwarning "Could not strip $file"
		cp "$RESULT" "$NVIDIA_MODULES" || perror "Could not copy $file"
	done

	rm -rf "$MODULE_BUILD_DIR/NVIDIA"
}

post_copy() {
	:
}