BUILDROOT_SRC ?= ~/src/buildroot

.PHONY: all initramfs package rootfs

all: initramfs rootfs

rootfs: _build/rootfs/.config
	$(MAKE) -C _build/rootfs

initramfs: _build/initramfs/images/initramfs.img.lz4

package:
	tar -c -f _build/metricspi.tar \
		-C ${PWD}/_build/initramfs/images \
		initramfs.img.lz4 \
		-C ${PWD}/_build/rootfs/images \
		rpi-firmware/ \
		bcm2711-rpi-cm4.dtb \
		Image \
		rootfs.squashfs \
		--

_build/initramfs/images/initramfs.img.lz4: _build/initramfs/.config
	$(MAKE) -C _build/initramfs
	cd _build/initramfs/images && ln rootfs.cpio.lz4 initramfs.img.lz4


_build/rootfs/.config: configs/metricspi_defconfig
	$(MAKE) -C $(BUILDROOT_SRC) O=${PWD}/_build/rootfs BR2_EXTERNAL=${PWD} metricspi_defconfig

_build/initramfs/.config: configs/metricspi_initramfs_defconfig
	$(MAKE) -C $(BUILDROOT_SRC) O=${PWD}/_build/initramfs BR2_EXTERNAL=${PWD} metricspi_initramfs_defconfig