release: add .version file

scripts/release.sh

@@ -19,9 +19,12 @@ else
     git tag -s "v$TAG" -m "Release v$TAG"
 fi
 
+echo $TAG > .version
+
 if [[ -d cmake && -x cmake/git-archive-all.sh ]]
 then
     ./cmake/git-archive-all.sh --prefix "${SOFTAG}/" -v "${SOFTAG}.tar"
+    tar rf "${SOFTAG}.tar" --transform "s=.=${SOFTAG}/.="   .version
     gzip "${SOFTAG}.tar"
 else
     git archive --format=tar.gz --prefix="${SOFTAG}/" HEAD > ${SOFTAG}.tar.gz