VERSION-GEN

#!/bin/sh
########################################################################
#
# Copyright 2016 Keith Busch
#
# This program is free software; you can redistribute it and/or
# modify it under the terms of the GNU General Public License
# as published by the Free Software Foundation; either version 2
# of the License, or (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
#
# Forked off of nvme-cli:
#   https://github.com/linux-nvme/nvme-cli/
#
########################################################################

GVF=build/version.h
MVF=build/version.mk
DEF_VER=v0.1

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; then
    VN=$(git describe --always --tags --match "v[0-9]*" HEAD 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*'\(.*\)')
MVN=$(expr "$VN" : v*'\([0-9.]*\)')

if test -r $GVF
then
	VC=$(sed -e 's/^#define VERSION //' <$GVF)
	VC="${VC%\"}"
	VC="${VC#\"}"
else
	VC=unset
fi

test "$VN" = "$VC" || {
	echo "  VER    $VN"
	echo "#define VERSION \"$VN\"" >$GVF
	echo "VERSION=$MVN" >$MVF
	echo "FULL_VERSION=$VN" >>$MVF
}