Sync Debian version (#4840)

* Sync Debian version

* Drop temporary logging

.travis/linux.debian-sid.script.sh

@@ -31,6 +31,40 @@ else
 	sudo pbuilder --update --basetgz "$BASETGZ"
 fi
 
+sync_version() {
+	local VERSION
+	local MMR
+	local STAGE
+	local EXTRA
+
+	VERSION=$(git describe --tags --match v[0-9].[0-9].[0-9]*)
+	VERSION=${VERSION#v}
+	MMR=${VERSION%%-*}
+	case $VERSION in
+	*-*-*-*)
+		VERSION=${VERSION%-*}
+		STAGE=${VERSION#*-}
+		STAGE=${STAGE%-*}
+		EXTRA=${VERSION##*-}
+		VERSION=$MMR~$STAGE.$EXTRA
+		;;
+	*-*-*)
+		VERSION=${VERSION%-*}
+		EXTRA=${VERSION##*-}
+		VERSION=$MMR.$EXTRA
+		;;
+	*-*)
+		STAGE=${VERSION#*-}
+		VERSION=$MMR~$STAGE
+		;;
+	esac
+
+	sed "1 s/@VERSION@/$VERSION/" -i debian/changelog
+	echo Set Debian version to $VERSION
+}
+
+sync_version
+
 DIR="$PWD"
 cd ..
 dpkg-source -b "$DIR"