#!/bin/sh

GVF=NVME-VERSION-FILE

DEF_VER=v1.12

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 --tags --match "v[0-9]*" --abbrev=4 HEAD 2>/dev/null) &&

	case "$VN" in

	*$LF*) (exit 1) ;;

	v[0-9]*)

		git update-index -q --refresh

		test -z "$(git diff-index --name-only HEAD --)" ||

		VN="$VN-dirty" ;;

	esac

then

	VN=$(echo "$VN" | sed -e 's/-/./g');

else

	VN="$DEF_VER"

fi

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

if test -r $GVF

then

	VC=$(sed -e 's/^NVME_VERSION = //' <$GVF)

else

	VC=unset

fi

test "$VN" = "$VC" || {

	echo >&2 "NVME_VERSION = $VN"

	echo "NVME_VERSION = $VN" >$GVF

}