WML_FILES=$(filter-out ./template.wml, $(shell find -name \*.wml))
MAKEFILE_DIRS=$(dir $(filter-out ./Makefile, $(shell find -name Makefile)))
HTML_GENERATED=$(WML_FILES:.wml=.html)
OLD_GENERATED=$(WML_FILES:.wml=.wml.old)

.SUFFIXES: .wml .html

all: makesub 
	$(MAKE) makewml
	
makewml: $(HTML_GENERATED)

makesub:
	for s in $(MAKEFILE_DIRS); do $(MAKE) -C $$s; done 	

.wml.html:
	@( diff -q $<.old $< 2> /dev/null > /dev/null && \
	test -e $(basename $<).html ) || \
	(echo Running WML on $<; cp $< $<.old ; \
	cd $(dir $<); \
	wml -o $(basename $(notdir $<)).html -DSRCFILE=$(notdir $<) $(notdir $<)) 

clean:
	rm -rf $(HTML_GENERATED) $(OLD_GENERATED)
	for s in $(MAKEFILE_DIRS); do $(MAKE) -C $$s clean; done 

sterile: clean
	for s in $(MAKEFILE_DIRS); do $(MAKE) -C $$s sterile; done