SHELL = /bin/sh
.SUFFIXES:

# functions for pages, and parts, takes a list of sources as the only argument
getpages = $(patsubst %.md,public_html/%.html,$(1))
getparts = $(patsubst %.md,public_html/%.html.part,$(1))

.PHONY: all
all: public_html/index.html $(call getpages,$(shell pandoc lua pandoc/links.lua --follow index.md))

.SECONDEXPANSION:
public_html/%.html: %.md $$(shell pandoc lua pandoc/links.lua %.md)
	$(eval links := $(filter-out $<,$^))
	$(if $(links),$(MAKE) $(call getparts,$(links)))
	pandoc --data-dir pandoc -d bavbavhaus.net.yaml --template bavbavhaus.net.html5 -M url=$*.html $(patsubst %,-M links=%,$(call getparts,$(links))) -o $@ $<

public_html/%.html.part: %.md
	pandoc --data-dir pandoc -d bavbavhaus.net.yaml --template bavbavhaus.net.inline.html5 -M url=$*.html --id-prefix $* -o $@ $<

.PHONY: clean
clean:
	$(RM) public_html/*.html.part
	$(RM) public_html/*.html