all: mwrap.pdf

DEB_DATE := $(shell dpkg-parsechangelog -S date)
PDF_DATE := $(shell date -ud '$(DEB_DATE)' +D:%Y%m%d%H%M%SZ)
mwrap.pdf: mwrap.tex
	pdflatex mwrap.tex
	sed -i "s|^/CreationDate (D:[-'0-9]\+)|/CreationDate ($(PDF_DATE))|" mwrap.pdf
	sed -i "s|^/ModDate (D:[-'0-9]\+)|/ModDate ($(PDF_DATE))|" mwrap.pdf
	MD5=`(echo $(DEB_DATE) && du -b $@) | md5sum | cut -c -32` && \
	sed -i "s|^/ID \\[\\(<[0-9A-F]\\{32\\}>\\) \\1]$$|/ID [<$$MD5> <$$MD5>]|" mwrap.pdf

clean:
	rm -f mwrap.aux mwrap.log mwrap.pdf