DTDS = glsa.dtd metadata.dtd mirrors.dtd projects.dtd \
       repositories.dtd userinfo.dtd

RNCS = $(patsubst %.dtd,%.rnc,$(DTDS)) devbook.rnc

ifneq ($(PV),)
P=nxml-gentoo-schemas-$(PV)
else
P=nxml-gentoo-schemas-$(shell TZ=UTC date '+%Y%m%d')
endif

.PHONY: all dist clean
.PRECIOUS: $(RNCS)

all: $(RNCS)

dist: Makefile LICENCE schemas.xml $(RNCS)
	tar -cJf $(P).tar.xz --transform='s%^%$(P)/%' $^

clean:
	rm -f *.dtd *.stamp *.tar.xz

%.rnc: %.dtd
	trang -I dtd -O rnc $< $@

$(DTDS):
	wget -N --no-verbose https://www.gentoo.org/dtd/$@

devbook.rnc: devbook.stamp

devbook.stamp:
	wget -N --no-verbose \
	  https://gitweb.gentoo.org/proj/devmanual.git/plain/devbook.rnc
	touch -r devbook.rnc $@