rel := https://k-space.ee.armbian.com/archive/aml-s9xx-box/archive/Armbian_23.11.1_Aml-s9xx-box_bookworm_current_6.1.63.img.xz
readme := https://k-space.ee.armbian.com/archive/aml-s9xx-box/archive/Armbian_23.11.1_Aml-s9xx-box_bookworm_current_6.1.63.img.txt
sig := https://k-space.ee.armbian.com/archive/aml-s9xx-box/archive/Armbian_23.11.1_Aml-s9xx-box_bookworm_current_6.1.63.img.xz.asc
sums := https://k-space.ee.armbian.com/archive/aml-s9xx-box/archive/Armbian_23.11.1_Aml-s9xx-box_bookworm_current_6.1.63.img.xz.sha

image := $(shell echo $(rel) | sed 's/.*\///')
raw := $(shell echo $(image) | sed 's/\.xz//')

$(image):
	curl -O $(readme)
	curl -O $(sig)
	curl -O $(sums)
	curl -O $(rel)

verify: $(image) $(image).asc
	gpg --verify $(image).asc $(image)

$(raw): $(image)
	xz -dk $(image)

mount: $(raw) umount
	mkdir -p ./rootfs
	mkdir -p ./boot
	chmod 777 ./rootfs
	chmod 777 ./boot
	sudo losetup /dev/loop1337 $(raw)
	sudo partprobe /dev/loop1337
	sudo mount /dev/loop1337p2 ./rootfs
	sudo mount /dev/loop1337p1 ./boot

# Armbian signing keys
get-keys:
	gpg --recv-keys DF00FAF1C577104B50BF1D0093D6889F9F0E78D5

umount:
	-sudo umount -f ./rootfs
	-sudo umount -f ./boot
	-sudo losetup -d /dev/loop1337

uboot: mount
	sudo cp boot/u-boot-s905x-s912 boot/u-boot.ext

# Replace ^FDT with ^#FDT in boot/extlinux/extlinux.conf
# Uncomment "#FDT /dtb/amlogic/meson-gxl-s905x-p212.dtb"
extlinux: uboot
	sudo sed -i 's/^FDT/#FDT/' boot/extlinux/extlinux.conf
	sudo sed -i 's/^#FDT \/dtb\/amlogic\/meson-gxl-s905x-p212.dtb/FDT \/dtb\/amlogic\/meson-gxl-s905x-p212.dtb/' boot/extlinux/extlinux.conf

armbian.img.zst: extlinux
	sudo dd if=/dev/loop1337 bs=1M | zstd -10 -fo $@

build: armbian.img.zst

sign: armbian.img.zst
	minisign -Sm $<

# Imbus personal key
verify:
	minisign -Vm armbian.img.zst -P RWRzPhin2brRy61x/adSOnFyhdWRkC0i37VJrOrFjMy6M073Mdu7gZXO

clean: umount
	rm -f $(image) $(raw) $(image).asc $(readme) $(sig) $(sums) armbian.img *.txt *.sha
	rm -f armbian.img.zst armbian.img.zst.minisig
	-rmdir ./rootfs
	-rmdir ./boot