FINGERPRINT_FILE=cache.fingerprint

.DEFAULT_GOAL := fixtures

# requirement 1: 'fixtures' goal to generate any and all test fixtures
fixtures:
	@echo "nothing to do"

# requirement 2: 'fingerprint' goal to determine if the fixture input that indicates any existing cache should be busted
fingerprint: $(FINGERPRINT_FILE)

# requirement 3: we always need to recalculate the fingerprint based on source regardless of any existing fingerprint
.PHONY: $(FINGERPRINT_FILE)
$(FINGERPRINT_FILE):
	@find image-* -type f -exec sha256sum {} \; | sort -k2 > $(FINGERPRINT_FILE)
	@#cat $(FINGERPRINT_FILE) | sha256sum | awk '{print $$1}'

# requirement 4: 'clean' goal to remove all generated test fixtures
.PHONY: clean
clean:
	rm -f $(FINGERPRINT_FILE)