TOP := $(dir $(lastword $(MAKEFILE_LIST)))
EXTRACT_DEPS = $(TOP)/extract_deps
LEAN_FILES = $(wildcard *.lean)
OLEAN_FILES = $(LEAN_FILES:.lean=.olean)
DEPS = make.deps

all: $(OLEAN_FILES) $(DEPS)

%.olean: %.lean
	$(LEAN) $< -o $@

%.olean: %.lua
	$(LEAN) $< -o $@

.PHONY: all clean

clean:
	-rm -f *.olean $(DEPS)

$(DEPS): $(LEAN_FILES)
	LEAN=$(LEAN) $(EXTRACT_DEPS) $(LEAN_FILES) > make.deps

ifneq ($(MAKECMDGOALS),clean)
-include $(DEPS)
endif