src = $(wildcard *.md)
posts = $(src:.md=.html)
index.html: $(posts) blog_header.html blog_footer.html gen_index
cat blog_header.html >$@
./gen_index >>$@
cat blog_footer.html >>$@
%.html: %.md post_header.html post_footer.html
cat post_header.html | sed "s/@TITLE@/`head -1 $< | sed 's/\//\\\\\//'`/" >$@
markdown $< >>$@
cat post_footer.html >>$@