#!/bin/sh

GVF=$1
APP=$2
DEF_VER=UNKNOWN

# First see if there is a version file (included in release tarballs),
# then try git-describe, then default.
if test -f version
then
	VN=$(cat version)
elif test -d .git
then
	VN=$(git describe 2>/dev/null) &&
	git update-index -q --refresh
#	test -z "$(git diff-index --name-only HEAD --)" ||
#	VN="$VN-dirty"
else
	VN="$DEF_VER"
fi

#VN=$(expr "$VN" : v*'\(.*\)')

echo "$VN"

if test -r $GVF
then
	VC=$(grep SYSTEM_VERSION $GVF | sed -e 's/^#define SYSTEM_VERSION //')
	VM=$(grep SYSTEM_APP $GVF | sed -e 's/^#define SYSTEM_APP //')
else
	VC=unset
fi
test "\"$VN\"" = "$VC" -a "\"-$APP\"" = "$VM" || {
	echo "#define SYSTEM_VERSION \"$VN\"" >$GVF
	echo "#define SYSTEM_APP \"-$APP\"" >>$GVF

}



