TARGET ?= "x86_64-unknown-none"
QEMU ?= "qemu-system-x86_64"

all: clean prepare gila iso run

# Prepare toolchain
prepare:
	rustup install nightly
	rustup target add $(TARGET)

# Run the ISO in an emulator.
run: build/gila.iso

ifeq ($(TARGET),x86_64-unknown-none)
	QEMU = "qemu-system-x86_64"
else ifeq ($(TARGET),riscv64gc-unknown-none-elf)
	QEMU = "qemu-system-riscv64"
else ifeq ($(TARGET),aarch64-unknown-none)
	QEMU = "qemu-system-aarch64"
else ifeq ($(TARGET),loongarch64-unknown-none)
	QEMU = "qemu-system-loongarch64"
endif

	$(QEMU) -drive file=build/gila.iso,format=raw,index=0,media=disk

# Build the bootable kernel image.
.PHONY: build/iso/gila
gila: prepare $(wildcard src/*.rs)
	mkdir -p build/iso/
	cargo build --release -Z unstable-options --target=$(TARGET) --artifact-dir build/iso/

# Build a bootable ISO and install Limine.
.PHONY: build/gila.iso
iso: build/iso/gila gila limine.conf
	mkdir -p build/iso/limine
	mkdir -p build/iso/EFI/BOOT
	cp ./limine.conf build/iso/
	cp /usr/share/limine/limine-bios.sys build/iso/limine/
	cp /usr/share/limine/limine-bios-cd.bin build/iso/limine/
	cp /usr/share/limine/limine-uefi-cd.bin build/iso/limine/
	xorriso -as mkisofs -b limine/limine-bios-cd.bin -no-emul-boot \
	-boot-load-size 4 -boot-info-table --efi-boot \
    limine/limine-uefi-cd.bin -efi-boot-part --efi-boot-image \
    --protective-msdos-label build/iso -o build/gila.iso
	limine bios-install build/gila.iso

clean:
	rm -rf build
	cargo clean