MAKEFLAGS += -R -r

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

GIT_DIR   ?= .git

MAX80_IP  ?= max80

CURL	   = curl
PERL	   = perl

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 git log -n 1 --date=iso --pretty="format:\
PROJECT=$(PROJECT)%n\
COMMIT_VERSION=%(describe:abbrev=6)%n\
COMMIT_ID=%H%nCOMMIT_MAGIC=%h%n\
COMMIT_DATE=%ci%n\
COMMIT_TIME=%ct%n\
COMMIT_AUTHOR=%an <%ae>%n\
" > '$@.tmp' 2>/dev/null && \
	! cmp -s '$@' '$@.tmp' 2>/dev/null; then \
	mv -f '$@.tmp' '$@'; else rm -f '$@.tmp'; fi

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

.PHONY: version
version: version.mk version.h version.vh

$(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 or serial port
ip = $(MAX80_IP)
upload-%:
	if [ -z '$(PORT)' ]; then \
		$(CURL) -v --data-binary @fpga/output/$*.fw http://$(ip)/sys/fwupdate ; \
	else \
		$(PERL) ./esp32/flashesp.pl fpga/output/$*.fw '$(PORT)' $(FLASHOPT); \
	fi