Documentation: update tutorial's discussion of origin

diff --git a/GIT-VERSION-GEN b/GIT-VERSION-GEN
index 73aaff0a2979de8bcfd72f8a10793a07f17c18ad..21ff949ea2be33aa3a51becff87f4d97d871459c 100755 (executable)
--- a/GIT-VERSION-GEN
+++ b/GIT-VERSION-GEN
@@ -1,17 +1,30 @@
 #!/bin/sh
 
 GVF=GIT-VERSION-FILE
-DEF_VER=v1.1.GIT
+DEF_VER=v1.4.5-rc0.GIT
+
+LF='
+'
 
 # First try git-describe, then see if there is a version file
 # (included in release tarballs), then default
-VN=$(git-describe --abbrev=4 HEAD 2>/dev/null) ||
-VN=$(cat version) ||
-VN="$DEF_VER"
+if VN=$(git describe --abbrev=4 HEAD 2>/dev/null) &&
+   case "$VN" in
+   *$LF*) (exit 1) ;;
+   v[0-9]*) : happy ;;
+   esac
+then
+       VN=$(echo "$VN" | sed -e 's/-/./g');
+elif test -f version
+then
+       VN=$(cat version) || VN="$DEF_VER"
+else
+       VN="$DEF_VER"
+fi
 
 VN=$(expr "$VN" : v*'\(.*\)')
 
-dirty=$(sh -c 'git-diff-index --name-only HEAD' 2>/dev/null) || dirty=
+dirty=$(sh -c 'git diff-index --name-only HEAD' 2>/dev/null) || dirty=
 case "$dirty" in
 '')
        ;;