MAKEFLAGS += -R -r

PROJECT   := max80
SUBDIRS   := esp32 tools rv32 fpga
REVISIONS := v1 v2 bypass

GIT_DIR   ?= .git

all clean spotless :
	$(MAKE) local.$@ $(SUBDIRS) goal=$@

prefpga:
	$(MAKE) local.all $(filter-out fpga,$(SUBDIRS)) goal=all

$(REVISIONS): prefpga
	$(MAKE) -C fpga $@

.PHONY: $(SUBDIRS)
$(SUBDIRS):
	$(MAKE) -C $@ $(goal)

.PHONY: version.mk
version.mk:
	if [ -d '$(GIT_DIR)' ]; then \
	    TZ=UTC0 git log -n 1 --date=local --abbrev=8 \
		--pretty='format:COMMIT_VERSION=$(PROJECT)-%(describe:abbrev=6)%nCOMMIT_ID=%H%nCOMMIT_MAGIC=%h%nCOMMIT_DATE=%cd UTC%n' > $@.tmp ; \
		if cmp -q '$@' '$@.tmp' 2>/dev/null; then \
			rm -f $@.tmp; else mv -f $@.tmp $@; fi \
	fi

version.%: version.mk version.%.sed
	sed -f $@.sed $< > $@

$(SUBDIRS): version.mk

esp32: version.h

rv32: version.h | tools

fpga: version.vh | rv32 esp32

local.all:

local.clean:
	rm -f *~ ./\#* \# *.bak *.tmp

local.spotless: local.clean
	rm -f version.h version.vh
	if [ -d .git ]; then rm -f version.mk; fi

# Obsolete target, need version
program flash:
	@echo 'Please specify one of: $(foreach rev,$(REVISIONS),$@-$(rev))' 1>&2
	@false

# FPGA-specific targets
program-% flash-%: prefpga
	$(MAKE) -C fpga $@

# ESP update by USB or serial port
upload-esp:
	$(MAKE) -C esp32 upload

# Update via HTTP
ip=max80
upload-%:
	curl -v --data-binary @fpga/output/$*.fw http://$(ip)/sys/fwupdate