GNUmakefile

DRAFTS := $(wildcard core/drafts/*.md ecosystem/drafts/*.md)
GFMFILES := $(DRAFTS:.md=.gfm)
MDFILES := $(DRAFTS) README.md $(wildcard core/*.md ecosystem/*.md)
HTMLFILES := $(MDFILES:.md=.html)

all: $(HTMLFILES) $(GFMFILES)
clean:
	rm -f $(HTMLFILES) $(GFMFILES) *~ */*~
.PHONY: all clean

%.html: %.md
	@case $$(pandoc --version | sed -ne '1s/pandoc *//p') in \
		[01].*) echo "Need pandoc version 2 or later" >&2; exit 1 ;; \
	esac
	title=$$(sed -ne '20q; s/^Title: *//p;' $^); \
	pagetitle=$${title:-$(notdir $*)}; \
	pandoc -s -f gfm -t html -V "pagetitle:$$pagetitle" -o $@ \
		-V "title:$$title" \
		-H "$$PWD/github-pandoc.css" $^

# Github doesn't re-wrap lines, so you have to upload with long lines.
# Create gfm files that can be pasted straight into github
%.gfm: %.md
	pandoc --wrap=none -f gfm -t gfm -o $@ $<