GIT-VERSION-GEN

#!/bin/sh
# based on GIT-VERSION-GEN from linux kernel

DEF_VER=v0.2.0.GIT
LF='
'

if [ -f version ]; then
    VN=$(<version)
elif test -d ${GIT_DIR:-.git} -o -f .git &&
    VN=$(git describe --match "v[0-9]*" --abbrev=7 HEAD 2>/dev/null) &&
        case "$VN" in
            *$LF*) (exit 1) ;;
            v[0-9]*)
                git update-index -q --refresh
                [ -z "$(git diff-index --name-only HEAD --)" ] || \
                    VN="$VN-dirty" ;;
        esac
then
    VN=$(echo "$VN" | sed -e"s/-/./g");
else
    VN="$DEF_VER"
fi

echo $VN