VERSION:=$(shell git describe --abbrev=7 --match '[0-9.]*'|sed -e s/_/~/ -e s/-/+/ -e s/-/~/)
# for released versions: 
# VERSION:=$(shell cat version.txt)
ELPA_VERSION:=$(subst ~,_,$(VERSION))

emacs/notmuch-version.el: emacs/notmuch-version.el.tmpl
	sed -e 's/%AG%/Generated file (from $(<F)) -- do not edit!/' \
	    -e 's/%VERSION%/"$(ELPA_VERSION)"/' $< > $@