ASM=nasm

SRC_DIR=source
BUILD_DIR=disk_images
DATA_DIR=data

# Floppy image
# Fat12
floppy_image: $(BUILD_DIR)/crawos.img
$(BUILD_DIR)/crawos.img: bootloader kernel
	dd if=/dev/zero of=$(BUILD_DIR)/crawos.img bs=512 count=2880 # Use dd to make a disk image
	mkfs.fat -F 12 -n "CRAWOS" $(BUILD_DIR)/crawos.img # Format the disk image with fat12
	dd if=$(BUILD_DIR)/boot.bin of=$(BUILD_DIR)/crawos.img conv=notrunc # Put boot.bin inside the disk image
	mcopy -i $(BUILD_DIR)/crawos.img $(BUILD_DIR)/kernel.bin "::kernel.bin" # Put kernel.bin inside the disk image
	for filename in $(DATA_DIR)/*; do mcopy -i $(BUILD_DIR)/crawos.img $$filename "::/$$(echo $$filename | xargs -n 1 basename)"; done

# Bootloader
bootloader: $(BUILD_DIR)/boot.bin
$(BUILD_DIR)/boot.bin:
	$(ASM) $(SRC_DIR)/bootload/boot.asm -f bin -o $ $(BUILD_DIR)/boot.bin

# Kernel
kernel: $(BUILD_DIR)/kernel.bin
$(BUILD_DIR)/kernel.bin:
	$(ASM) $(SRC_DIR)/kernel/kernel.asm -f bin -o $ $(BUILD_DIR)/kernel.bin