ISSUES != find issues -type d
DEST_PDF_FILES := $(ISSUES:issues/%=issue-%.pdf)

PANDOC != command -v pandoc 2> /dev/null

all: $(DEST_PDF_FILES)

issue-%.pdf: issues/%
	$(PANDOC) \
		--file-scope \
		--from markdown \
		--to latex \
		--pdf-engine xelatex \
		--table-of-contents \
		--variable title:"tildeverse zine $@" \
		--standalone \
		--output $@ \
		$</*.md