btrfs-progs/version.sh

#!/bin/bash
#
# determine-version -- report a useful version for releases
#
# Copyright 2008, Aron Griffis <agriffis@n01se.net>
# Copyright 2008, Oracle
# Released under the GNU GPLv2

v="v4.12.1"

opt=$1

which git &> /dev/null
if [ $? == 0 -a -d .git ]; then
    if head=`git rev-parse --verify HEAD 2>/dev/null`; then
        if tag=`git describe --tags 2>/dev/null`; then
            v="$tag"
        fi

        # Are there uncommitted changes?
        git update-index --refresh --unmerged > /dev/null
        if git diff-index --name-only HEAD | grep -v "^scripts/package" \
            | read dummy; then
            v="$v"-dirty
        fi
    fi
fi

if [ "$opt" = "--configure" ]; then
	# Omit the trailing newline, so that m4_esyscmd can use the result directly.
	echo -n "$v"
else
	echo "$v"
fi

exit 0