# ----- define these variables
# CACHED_FILES     = $(TOPDIR)/VERSION
# CACHED_VARS      = VERSION
.PHONY: cache clean-cache clean-cache-projects

CACHE_PROJECT_MK            ?= .cache-project.mk
CACHED_VARS_ONLY_PROJECT    ?= \
	PROJECT \
	PREREQ \
	VERSION \
	HEX_VERSION \
	FULL_NAME \
	JW_PKG_LD_LIBRARY_PATH \
	JW_PKG_EXE_PATH \
	JW_PKG_PYTHON_PATH
all: cache
clean: clean-cache
clean-cache:
	rm -f $(CACHE_PROJECT_MK)

cache: $(CACHE_PROJECT_MK)
$(CACHE_PROJECT_MK): $(CACHED_FILES) $(JWBDIR)/make/cache.mk
	@echo $(foreach v,$(CACHED_VARS),$v = $(value $(v))EOL) | \
		$(SED) 's/EOL */\n/g;' | \
		$(SED) 's|$(realpath $(TOPDIR))|$$(TOPDIR)|g' | \
		$(SED) 's|$(realpath $(PROJECTS_DIR))|$$(PROJECTS_DIR)|g' | \
		$(GREP) . | \
		tee $@.tmp
	mv $@.tmp $@