+
+IS_GIT:=$(if $(wildcard ${srcdir}/.git),yes,no)
+
+ifeq ($(IS_GIT),yes)
+DATE:=$(shell git --git-dir=${srcdir}/.git log --date=short -1 --pretty=format:%cd)
+else
+DATE:=$(shell date +%F)
+endif
+
+VERSION:=$(shell cat ${srcdir}/version)
+ELPA_VERSION:=$(subst ~,_,$(VERSION))
+ifeq ($(filter release release-message pre-release update-versions,$(MAKECMDGOALS)),)
+ifeq ($(IS_GIT),yes)
+VERSION:=$(shell git --git-dir=${srcdir}/.git describe --abbrev=7 --match '[0-9.]*'|sed -e s/_/~/ -e s/-/+/ -e s/-/~/)
+# drop the ~g$sha1 part
+ELPA_VERSION:=$(word 1,$(subst ~, ,$(VERSION)))
+# Write the file 'version.stamp' in case its contents differ from $(VERSION)
+FILE_VERSION:=$(shell test -f version.stamp && read vs < version.stamp || vs=; echo $$vs)
+ifneq ($(FILE_VERSION),$(VERSION))
+ $(shell echo "$(VERSION)" > version.stamp)
+endif
+endif
+endif
+
+UPSTREAM_TAG=$(subst ~,_,$(VERSION))
+DEB_TAG=debian/$(UPSTREAM_TAG)-1