#!/bin/sh

GVF=FIO-VERSION-FILE
DEF_VER=fio-3.6

LF='
'

# 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` || VN="$DEF_VER"
elif test -d .git -o -f .git &&
	VN=`git describe --match "fio-[0-9]*" --abbrev=4 HEAD 2>/dev/null` &&
	case "$VN" in
	*$LF*) (exit 1) ;;
	fio-[0-9]*)
		git update-index -q --refresh
		test -z "`git diff-index --name-only HEAD --`" ||
		VN="$VN-dirty" ;;
	esac
then
	VN=$VN
else
	VN="$DEF_VER"
fi

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

if test -r $GVF
then
	VC=`sed -e 's/^FIO_VERSION = //' <$GVF`
else
	VC=unset
fi
test "$VN" = "$VC" || {
	echo >&2 "FIO_VERSION = $VN"
	echo "FIO_VERSION = $VN" >$GVF
}