#!/bin/bash
if [ -s "$REDHAT/linux-kernel-test.patch" ]; then
	echo "linux-kernel-test.patch is not empty, aborting" >&2;
	exit 1;
fi

# If DERIVATIVE_STREAM is enabled, increment DERIVATIVE_BUILD and exit
# (skip RHEL_RELEASE increment for derivative streams).
if [ "${DERIVATIVE_STREAM}" == "yes" ]; then
	DERIVATIVE_BUILD="$((DERIVATIVE_BUILD + 1))";
	sed -i -e "s/^DERIVATIVE_BUILD\ =.*/DERIVATIVE_BUILD = $DERIVATIVE_BUILD/" "$REDHAT"/../Makefile.rhelver;
	echo "DERIVATIVE_BUILD set to ${DERIVATIVE_BUILD}"
	exit 0
fi

RELEASE=$(sed -n -e 's/^RHEL_RELEASE\ =\ \(.*\)/\1/p' "$REDHAT"/../Makefile.rhelver)

YVER=$(echo "$RELEASE" | cut -d "." -f 1)
YVER=${YVER:="$RELEASE"}
ZMAJ=$(echo "$RELEASE" | cut -s -d "." -f 2)
ZMAJ=${ZMAJ:=0}
ZMIN=$(echo "$RELEASE" | cut -s -d "." -f 3)
ZMIN=${ZMIN:=0}

if [ "$ZSTREAM_FLAG" == "no" ]; then
	if [ "$YSTREAM_FLAG" == "yes" ]; then
		NEW_RELEASE="$((RELEASE + 1))";
	fi
elif [ "$ZSTREAM_FLAG" == "yes" ]; then
	NEW_RELEASE=$YVER.$((ZMAJ+1)).1;
elif [ "$ZSTREAM_FLAG" == "branch" ]; then
	NEW_RELEASE=$YVER.$ZMAJ.$((ZMIN+1));
else
	echo "$(basename "$0") invalid <zstream> value, allowed [no|yes|branch]" >&2;
	exit 1;
fi

sed -i -e "s/RHEL_RELEASE\ =.*/RHEL_RELEASE\ =\ $NEW_RELEASE/" "$REDHAT"/../Makefile.rhelver;