Makefile.doc

MMARK:=mmark -man
PLUGINS:=$(wildcard plugin/*/README.md)
READMES:=$(subst plugin/,,$(PLUGINS))
READMES:=$(subst /README.md,,$(READMES))
PLUGINS:=$(subst plugin/,coredns-,$(PLUGINS))
PLUGINS:=$(subst /README.md,(7),$(PLUGINS))

ifeq (, $(shell which mmark))
    $(warning "No mmark in $$PATH, exiting, see github.com/mmarkdown/mmark")
all:
	@echo "noop"
else
all: man/coredns.1 man/corefile.5 plugins
endif

man/coredns.1: coredns.1.md
	@/bin/echo -e '%%%\n title = "coredns 1"\n' \
		'area = "CoreDNS"\n workgroup = "CoreDNS"\n%%%\n\n' > $@.header
	@cat $@.header $< > $@.md && rm $@.header
	@sed -i -e "s/@@PLUGINS@@/$(PLUGINS)/" $@.md
	$(MMARK) $@.md > $@ && rm $@.md

man/corefile.5: corefile.5.md
	@/bin/echo -e '%%%\n title = "corefile 5"\n' \
		'area = "CoreDNS"\n workgroup = "CoreDNS"\n%%%\n\n' > $@.header
	@cat $@.header $< > $@.md && rm $@.header
	$(MMARK) $@.md > $@ && rm $@.md

.PHONY: plugins
plugins:
	for README in $(READMES); do \
	    $(MAKE) -f Makefile.doc man/coredns-$$README.7; \
	done

man/coredns-%.7: plugin/%/README.md
	@/bin/echo -e "%%%\n title = \"`basename $@ | sed s\/\.7\/\/` 7\"\n" \
		'area = "CoreDNS"\n workgroup = "CoreDNS Plugins"\n%%%\n\n' > $@.header
	@cat $@.header $< > $@.md && rm $@.header
	@sed -i '/^# .*/d' $@.md
	$(MMARK) $@.md > $@ && rm $@.md

PHONY: clean
clean:
	rm -f man/*