#!/bin/bash
#!/bin/bash
fetch_source() {
	:
}

build() {
	local COPYLIST BIN_LOCATION DRM_MODULES FILE BIN MODNAME PCI_FILE ALIAS VENDOR DEVICE LIB
	local COPYLIST="list_binaries_and_files"
	[ -e "$COPYLIST" ] && rm -f "$COPYLIST"
	for BIN in $REQUIRED_BINARIES; do
		local BIN_LOCATION=$(which "$BIN")
		[ -z "$BIN_LOCATION" ] && perror "Cannot find $BIN"
		get_link_chain "$BIN_LOCATION" >> "$COPYLIST"
	done

	mkdir -p "$MODULE_BUILD_DIR/lib"
	find /lib /lib64 /usr/lib /usr/lib64 \( -name "libnss_dns*" -o -name "libresolv*" -o -name "libnss_files*" \) >> "$COPYLIST"

	tarcopy "$(cat "$COPYLIST" | sort -u)" "$MODULE_BUILD_DIR"

	# generate drm module loading database
	pinfo "Generating PCI ID database for DRM drivers"
	local DRM_MODULES="$KERNEL_BASE_DIR/lib/modules/$TARGET_KERNEL_LONG/kernel/drivers/gpu/drm"
	mkdir -p "$MODULE_BUILD_DIR/drm.cfg.d"
	local PCI_FILE="$MODULE_BUILD_DIR/drm.cfg.d/99-modinfo"
	rm -f -- "$PCI_FILE"
	[ -d "$DRM_MODULES" ] || perror "DRM dir not found at $DRM_MODULES"
	echo "# -- generated from kernel $TARGET_KERNEL_LONG modules:" >> "$PCI_FILE"
	for FILE in $(find "$DRM_MODULES" -name "*.ko" | sort -u); do # sort -u is an ugly hack to get amdgpu to take precedence over radeon
		local MODNAME=$(basename "$FILE")
		MODNAME=${MODNAME%.ko}
		[ -z "$MODNAME" ] && perror "$FILE equals empty modname"
		echo "# $MODNAME" >> "$PCI_FILE"
		for ALIAS in $(modinfo "$FILE" | grep '^alias:' | grep -o 'pci:v.*' | tr 'A-F' 'a-f'); do
			VENDOR=$(echo $ALIAS | cut -c 10-13)
			if [ "x$(echo $ALIAS | cut -c 15)" == "x*" ]; then
				# device wildcard
				grep -q -i "^${VENDOR}\s" "$PCI_FILE" && continue
				echo "${VENDOR} $MODNAME" >> "$PCI_FILE"
			else
				# specific device
				DEVICE=$(echo $ALIAS | cut -c 19-22)
				grep -q -i "^${VENDOR}:${DEVICE}\s" "$PCI_FILE" && continue
				echo "${VENDOR}:${DEVICE} $MODNAME" >> "$PCI_FILE"
			fi
		done
	done
}

post_copy() {
	pinfo "Generating rootfs for Stage 3.1 ..."
	generate_rootfs

	# copy kernel, modules and firmware
	copy_kernel_modules
	copy_kernel
}

#
# helper functions to generate the base rootfs
#
generate_rootfs() {
	# create basic directory structure
	mkdir -p "${TARGET_BUILD_DIR}"/{bin,dev,proc,run,etc,mnt,sys} \
		|| perror "Cannot create basic directory structure in '${TARGET_BUILD_DIR}'"

	# copy device files from running system
	cp -a /dev/{console,kmsg,mem,null,tty,tty0,tty1,tty9,urandom,zero} \
		"${TARGET_BUILD_DIR}"/dev || perror "Cannot copy devices from running system"

	# copy libc and ld-linux
	tarcopy "$(list_basic_libs)" "${TARGET_BUILD_DIR}"
}