Sed spaghetti

makefile

@@ -28,6 +28,7 @@ mount: $(raw) umount
 	sudo mount /dev/loop1337p2 ./rootfs
 	sudo mount /dev/loop1337p1 ./boot
 
+# Armbian signing keys
 get-keys:
 	gpg --recv-keys DF00FAF1C577104B50BF1D0093D6889F9F0E78D5
 
@@ -36,11 +37,29 @@ umount:
 	-sudo umount -f ./boot
 	-sudo losetup -d /dev/loop1337
 
-create-image:
-	sudo dd if=/dev/loop1337 of=armbian.img bs=1M
-	sudo chown $(USER):$(USER) armbian.img
+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