ARCH?=x86_64

# Kernel variables
KTARGET=$(ARCH)-unknown-none
KBUILD=build/kernel
KRUSTC=./krustc.sh
KRUSTCFLAGS=--target $(KTARGET).json -C soft-float
KCARGO=RUSTC="$(KRUSTC)" cargo
KCARGOFLAGS=--target $(KTARGET).json -- -C soft-float

# Userspace variables
TARGET=$(ARCH)-unknown-redox
BUILD=build/userspace
RUSTC=./rustc.sh
RUSTCFLAGS=--target $(TARGET).json -C opt-level=2 --cfg redox
CARGO=RUSTC="$(RUSTC)" cargo
CARGOFLAGS=--target $(TARGET).json -- -C opt-level=2 --cfg redox

# Default targets
.PHONY: all clean qemu bochs FORCE

all: $(KBUILD)/harddrive.bin

clean:
	cargo clean
	cargo clean --manifest-path libstd/Cargo.toml
	cargo clean --manifest-path drivers/ahcid/Cargo.toml
	cargo clean --manifest-path drivers/ps2d/Cargo.toml
	cargo clean --manifest-path drivers/pcid/Cargo.toml
	cargo clean --manifest-path drivers/vesad/Cargo.toml
	cargo clean --manifest-path programs/init/Cargo.toml
	cargo clean --manifest-path programs/ion/Cargo.toml
	cargo clean --manifest-path programs/login/Cargo.toml
	cargo clean --manifest-path programs/coreutils/Cargo.toml
	cargo clean --manifest-path programs/extrautils/Cargo.toml
	cargo clean --manifest-path schemes/example/Cargo.toml
	cargo clean --manifest-path schemes/redoxfs/Cargo.toml
	rm -rf initfs/bin
	rm -rf filesystem/bin
	rm -rf build

FORCE:

# Emulation
QEMU=qemu-system-$(ARCH)
QEMUFLAGS=-serial mon:stdio -d cpu_reset -d guest_errors
ifeq ($(ARCH),arm)
	LD=$(ARCH)-none-eabi-ld
	QEMUFLAGS+=-cpu arm1176 -machine integratorcp
	QEMUFLAGS+=-nographic

%.list: %
	$(ARCH)-none-eabi-objdump -C -D $< > $@

$(KBUILD)/harddrive.bin: $(KBUILD)/kernel
	cp $< $@

qemu: $(KBUILD)/harddrive.bin
	$(QEMU) $(QEMUFLAGS) -kernel $<
else
	LD=ld
	QEMUFLAGS+=-machine q35 -smp 4 -m 256
	ifneq ($(kvm),no)
		QEMUFLAGS+=-enable-kvm -cpu host
	endif
	ifeq ($(vga),no)
		QEMUFLAGS+=-nographic -vga none
	endif
	#,int,pcall
	#-device intel-iommu

	UNAME := $(shell uname)
	ifeq ($(UNAME),Darwin)
		LD=$(ARCH)-elf-ld
	endif

%.list: %
	objdump -C -M intel -D $< > $@

$(KBUILD)/harddrive.bin: $(KBUILD)/kernel $(BUILD)/filesystem.bin bootloader/$(ARCH)/**
	nasm -f bin -o $@ -D ARCH_$(ARCH) -ibootloader/$(ARCH)/ bootloader/$(ARCH)/harddrive.asm

qemu: $(KBUILD)/harddrive.bin
	$(QEMU) $(QEMUFLAGS) -drive file=$<,format=raw,index=0,media=disk
endif

bochs: $(KBUILD)/harddrive.bin
	bochs -f bochs.$(ARCH)

# Kernel recipes
$(KBUILD)/libcore.rlib: rust/src/libcore/lib.rs
	mkdir -p $(KBUILD)
	$(KRUSTC) $(KRUSTCFLAGS) -o $@ $<

$(KBUILD)/librand.rlib: rust/src/librand/lib.rs $(KBUILD)/libcore.rlib
	$(KRUSTC) $(KRUSTCFLAGS) -o $@ $<

$(KBUILD)/liballoc.rlib: rust/src/liballoc/lib.rs $(KBUILD)/libcore.rlib
	$(KRUSTC) $(KRUSTCFLAGS) -o $@ $<

$(KBUILD)/librustc_unicode.rlib: rust/src/librustc_unicode/lib.rs $(KBUILD)/libcore.rlib
	$(KRUSTC) $(KRUSTCFLAGS) -o $@ $<

$(KBUILD)/libcollections.rlib: rust/src/libcollections/lib.rs $(KBUILD)/libcore.rlib $(KBUILD)/liballoc.rlib $(KBUILD)/librustc_unicode.rlib
	$(KRUSTC) $(KRUSTCFLAGS) -o $@ $<

$(KBUILD)/libkernel.a: kernel/** $(KBUILD)/libcore.rlib $(KBUILD)/liballoc.rlib $(KBUILD)/libcollections.rlib $(BUILD)/initfs.rs FORCE
	$(KCARGO) rustc $(KCARGOFLAGS) -o $@

$(KBUILD)/kernel: $(KBUILD)/libkernel.a
	$(LD) --gc-sections -z max-page-size=0x1000 -T arch/$(ARCH)/src/linker.ld -o $@ $<

# Userspace recipes
$(BUILD)/libcore.rlib: rust/src/libcore/lib.rs
	mkdir -p $(BUILD)
	$(RUSTC) $(RUSTCFLAGS) -o $@ $<

$(BUILD)/librand.rlib: rust/src/librand/lib.rs $(BUILD)/libcore.rlib
	$(RUSTC) $(RUSTCFLAGS) -o $@ $<

$(BUILD)/liballoc.rlib: rust/src/liballoc/lib.rs $(BUILD)/libcore.rlib
	$(RUSTC) $(RUSTCFLAGS) -o $@ $<

$(BUILD)/librustc_unicode.rlib: rust/src/librustc_unicode/lib.rs $(BUILD)/libcore.rlib
	$(RUSTC) $(RUSTCFLAGS) -o $@ $<

$(BUILD)/libcollections.rlib: rust/src/libcollections/lib.rs $(BUILD)/libcore.rlib $(BUILD)/liballoc.rlib $(BUILD)/librustc_unicode.rlib
	$(RUSTC) $(RUSTCFLAGS) -o $@ $<

openlibm/libopenlibm.a:
	CFLAGS=-fno-stack-protector make -C openlibm

$(BUILD)/libopenlibm.a: openlibm/libopenlibm.a
	mkdir -p $(BUILD)
	cp $< $@

$(BUILD)/libstd.rlib: libstd/Cargo.toml libstd/src/** $(BUILD)/libcore.rlib $(BUILD)/liballoc.rlib $(BUILD)/librustc_unicode.rlib $(BUILD)/libcollections.rlib $(BUILD)/librand.rlib $(BUILD)/libopenlibm.a
	$(CARGO) rustc --verbose --manifest-path $< $(CARGOFLAGS) -o $@
	cp libstd/target/$(TARGET)/debug/deps/*.rlib $(BUILD)

initfs/bin/%: drivers/%/Cargo.toml drivers/%/src/** $(BUILD)/libstd.rlib
	mkdir -p initfs/bin
	$(CARGO) rustc --manifest-path $< $(CARGOFLAGS) -o $@
	strip $@
	rm $@.d

initfs/bin/%: programs/%/Cargo.toml programs/%/src/** $(BUILD)/libstd.rlib
	mkdir -p initfs/bin
	$(CARGO) rustc --manifest-path $< $(CARGOFLAGS) -o $@
	strip $@
	rm $@.d

initfs/bin/%: schemes/%/Cargo.toml schemes/%/src/** $(BUILD)/libstd.rlib
	mkdir -p initfs/bin
	$(CARGO) rustc --manifest-path $< --bin $* $(CARGOFLAGS) -o $@
	strip $@
	rm $@.d

initfs_drivers: \
	initfs/bin/ahcid \
	initfs/bin/pcid

initfs_schemes: \
	initfs/bin/redoxfs

$(BUILD)/initfs.rs: \
		initfs/bin/init \
		initfs_drivers \
		initfs_schemes
	echo 'use collections::BTreeMap;' > $@
	echo 'pub fn gen() -> BTreeMap<&'"'"'static [u8], (&'"'"'static [u8], bool)> {' >> $@
	echo '    let mut files: BTreeMap<&'"'"'static [u8], (&'"'"'static [u8], bool)> = BTreeMap::new();' >> $@
	for folder in `find initfs -type d | sort`; do \
		name=$$(echo $$folder | sed 's/initfs//' | cut -d '/' -f2-) ; \
		echo -n '    files.insert(b"'$$name'", (b"' >> $@ ; \
		ls -1 $$folder | sort | awk 'NR > 1 {printf("\\n")} {printf("%s", $$0)}' >> $@ ; \
		echo '", true));' >> $@ ; \
	done
	find initfs -type f -o -type l | cut -d '/' -f2- | sort | awk '{printf("    files.insert(b\"%s\", (include_bytes!(\"../../initfs/%s\"), false));\n", $$0, $$0)}' >> $@
	echo '    files' >> $@
	echo '}' >> $@

filesystem/bin/%: drivers/%/Cargo.toml drivers/%/src/** $(BUILD)/libstd.rlib
	mkdir -p filesystem/bin
	$(CARGO) rustc --manifest-path $< $(CARGOFLAGS) -o $@
	strip $@
	rm $@.d

filesystem/bin/%: programs/%/Cargo.toml programs/%/src/** $(BUILD)/libstd.rlib
	mkdir -p filesystem/bin
	$(CARGO) rustc --manifest-path $< $(CARGOFLAGS) -o $@
	strip $@
	rm $@.d

filesystem/bin/%: programs/coreutils/Cargo.toml programs/coreutils/src/bin/%.rs $(BUILD)/libstd.rlib
	mkdir -p filesystem/bin
	$(CARGO) rustc --manifest-path $< --bin $* $(CARGOFLAGS) -o $@
	strip $@
	rm $@.d

filesystem/bin/%: programs/extrautils/Cargo.toml programs/extrautils/src/bin/%.rs $(BUILD)/libstd.rlib
	mkdir -p filesystem/bin
	$(CARGO) rustc --manifest-path $< --bin $* $(CARGOFLAGS) -o $@
	strip $@
	rm $@.d

filesystem/bin/%: schemes/%/Cargo.toml schemes/%/src/** $(BUILD)/libstd.rlib
	mkdir -p filesystem/bin
	$(CARGO) rustc --manifest-path $< --bin $* $(CARGOFLAGS) -o $@
	strip $@
	rm $@.d

drivers: \
	filesystem/bin/ps2d \
	filesystem/bin/vesad

coreutils: \
	filesystem/bin/basename \
	filesystem/bin/cat \
	filesystem/bin/clear \
	filesystem/bin/cp \
	filesystem/bin/cut \
	filesystem/bin/date \
	filesystem/bin/du \
	filesystem/bin/echo \
	filesystem/bin/env \
	filesystem/bin/false \
	filesystem/bin/head \
	filesystem/bin/ls \
	filesystem/bin/mkdir \
	filesystem/bin/mv \
	filesystem/bin/printenv \
	filesystem/bin/pwd \
	filesystem/bin/realpath \
	filesystem/bin/reset \
	filesystem/bin/rmdir \
	filesystem/bin/rm \
	filesystem/bin/seq \
	filesystem/bin/sleep \
	filesystem/bin/tail \
	filesystem/bin/time \
	filesystem/bin/touch \
	filesystem/bin/true \
	filesystem/bin/wc \
	filesystem/bin/yes
	#filesystem/bin/free filesystem/bin/ps filesystem/bin/shutdown filesystem/bin/test

extrautils: \
	filesystem/bin/calc \
	filesystem/bin/cksum \
	filesystem/bin/cur \
	filesystem/bin/grep \
	filesystem/bin/less \
	filesystem/bin/mdless \
	filesystem/bin/mtxt \
	filesystem/bin/rem \
	#filesystem/bin/dmesg filesystem/bin/info filesystem/bin/man filesystem/bin/watch


schemes: \
	filesystem/bin/example

$(BUILD)/filesystem.bin: \
		drivers \
		coreutils \
		extrautils \
		schemes \
		filesystem/bin/ion \
		filesystem/bin/login \
		filesystem/bin/smith
	rm -rf $@ $(BUILD)/filesystem/
	echo exit | cargo run --manifest-path schemes/redoxfs/Cargo.toml --bin redoxfs-utility $@
	mkdir -p $(BUILD)/filesystem/
	cargo run --manifest-path schemes/redoxfs/Cargo.toml --bin redoxfs-fuse $@ $(BUILD)/filesystem/ &
	sleep 2
	-cp -RL filesystem/* $(BUILD)/filesystem/
	sync
	-fusermount -u $(BUILD)/filesystem/
	rm -rf $(BUILD)/filesystem/

mount: FORCE
	mkdir -p $(KBUILD)/harddrive/
	cargo run --manifest-path schemes/redoxfs/Cargo.toml --bin redoxfs-fuse $(KBUILD)/harddrive.bin $(KBUILD)/harddrive/ &
	sleep 2

unmount: FORCE
	sync
	-fusermount -u $(KBUILD)/harddrive/
	rm -rf $(KBUILD)/harddrive/