.PHONY: all setup clean mrproper

APP_NAME=run
RKT_NAME=$(APP_NAME).rkt

####################################################################################################

# download urls for stuff
RKT_DIST=racket-minimal-7.8-src.tgz
# what's in the racket tgz
RKT_DIR=racket-7.8
RKT_URL="https://mirror.racket-lang.org/installers/7.8/$(RKT_DIST)"

ALPINE_DIST=alpine-minirootfs-3.12.0-x86_64.tar.gz
ALPINE_URL="http://dl-cdn.alpinelinux.org/alpine/v3.12/releases/x86_64/$(ALPINE_DIST)"

# container is built and stored in here
CACHE_DIR=.cache

PATCHELF=patchelf
OBJCOPY=$(CROSS_COMPILE)objcopy
OBJDUMP=$(CROSS_COMPILE)objdump

all: setup exec-in-container

# rerun inside container
exec-in-container: setup
	rsync -avR $(RKT_NAME) main_bc.c startup.c Makefile scripts/crimes.c scripts/crimes.h \
		$(CACHE_DIR)/alpine/build/
	sudo chmod 777 $(CACHE_DIR)/alpine/build $(CACHE_DIR)/alpine/build/scripts
	sudo systemd-nspawn -UD $(CACHE_DIR)/alpine -- sh -c "cd build; make $(APP_NAME)"
	cp $(CACHE_DIR)/alpine/build/$(APP_NAME) .

clean-in-container:
	sudo systemd-nspawn -UD $(CACHE_DIR)/alpine -- sh -c "cd build; rm -rf *"

# main build stuff
DEBUG_CFLAGS=-g3 -no-pie -fno-pie
$(APP_NAME): main_bc.c app.o scripts/crimes startup.bin
	# $(CC) -o $@ -pipe -O3 -DAPP_NAME='"$(APP_NAME)"' -static $^ -lracket3m -lrktio -lucontext -lffi
	$(CC) -o $@ -pipe -O3 $(DEBUG_CFLAGS) -DAPP_NAME='"$(APP_NAME)"' -Wl,-eelf_crimes \
		main_bc.c app.o /usr/lib/libracket3m.a /usr/lib/librktio.a /usr/lib/libffi.a /lib/libucontext.a
	$(PATCHELF) --remove-needed $$($(OBJDUMP) -x $@ | grep NEEDED | awk '{print $$2}') $@
	$(OBJCOPY) --remove-section .interp -- $@
	scripts/crimes $@

scripts/crimes: scripts/crimes.c scripts/crimes.h
	$(CC) -o $@ -pipe -O3 -g0 $<

startup.elf: startup.c
	$(CC) -flto -O3 -g3 -Wl,-z,norelro -ffunction-sections -fdata-sections -static -pipe \
		-Wl,-ecrimes_startup_run -fno-stack-protector -nostartfiles -fpie -pie -o $@ $<

startup.bin: startup.elf
	$(OBJCOPY) -O binary $< $@

# this is faster than --c-mods by a lot
# it's less portable but like, we're containerized already so it'll work
app.o: app.zo
	$(LD) -r -b binary $< -o $@

app.zo: $(RKT_NAME)
	raco ctool --mods $@ $<

clean:
	$(RM) $(APP_NAME) *.zo *.o
	$(RM) scripts/crimes startup.bin startup.elf

mrproper: clean
	sudo $(RM) -rf $(CACHE_DIR)/alpine
	$(RM) -rf $(CACHE_DIR)/alpine

# setup stuff
setup: $(CACHE_DIR)/.setup

$(CACHE_DIR)/.setup: $(CACHE_DIR)/$(ALPINE_DIST) $(CACHE_DIR)/$(RKT_DIST)
	-mkdir -p $(CACHE_DIR)/alpine
	sudo rm -rf $(CACHE_DIR)/alpine
	mkdir $(CACHE_DIR)/alpine
	tar xf "$(CACHE_DIR)/$(ALPINE_DIST)" -C $(CACHE_DIR)/alpine
	tar xf "$(CACHE_DIR)/$(RKT_DIST)" -C $(CACHE_DIR)/alpine
	cp scripts/setup.sh $(CACHE_DIR)/alpine/setup.sh
	cp scripts/repositories.conf $(CACHE_DIR)/alpine/etc/apk/repositories
	mkdir $(CACHE_DIR)/alpine/build
	chmod 777 $(CACHE_DIR)/alpine/build
	sudo systemd-nspawn -UD $(CACHE_DIR)/alpine -- sh /setup.sh
	touch $@

$(CACHE_DIR)/$(ALPINE_DIST):
	-mkdir -p $(CACHE_DIR)/alpine
	wget -O $@ $(ALPINE_URL)

$(CACHE_DIR)/$(RKT_DIST):
	-mkdir -p $(CACHE_DIR)/alpine
	wget -O $@ $(RKT_URL)