nagios-plugins/NP-VERSION-GEN

#!/bin/sh
#
# This is from the Git repository (GIT-VERSION-GEN with modifications)
#

SRC_ROOT=`dirname $0`

NPVF=NP-VERSION-FILE
DEF_VER=1.4.13.git

LF='
'

# First see if there is a version file (included in release tarballs),
# then try git-describe, then default.
if test -f $SRC_ROOT/version
then
	VN=`cat $SRC_ROOT/version` || VN="$DEF_VER"
elif test -d $SRC_ROOT/.git -o -f $SRC_ROOT/.git &&
	VN=`cd $SRC_ROOT; git describe --abbrev=4 HEAD 2>/dev/null` &&
	case "$VN" in
	*$LF*) (exit 1) ;;
	release-[0-9]*)
		git update-index -q --refresh
		test -z "`git diff-index --name-only HEAD --`" ||
		VN="$VN-dirty" ;;
	esac
then
	VN=`echo "$VN" | sed -e 's/^release-//' | sed -e 's/-/./g'`;
else
	VN="$DEF_VER"
fi

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

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