#!/bin/bash

DIST="anX"
KVER="5.16.10"
BASE=$1
RELEASE_TAG=$2
AUTHOR_MAIL="Shile Zhang <shile.zhang@linux.alibaba.com>"
CHANGELOG="$(pwd)/changelog"
CK_DIR="../ck/"

BRANCH="linux-next"

function update_spec() {
	### update kernel release
	KREL=${RELEASE_TAG##*-}
	sed -i "s/!KREL:.*}/!KREL:${KREL}}/g" kernel.spec

	### update changelog
	echo "* $(date +"%a %b %d %Y") ${AUTHOR_MAIL} [${RELEASE_TAG}.${DIST}]" > ${CHANGELOG}
	pushd ${CK_DIR} >/dev/null 2>&1
	git checkout ${BRANCH} || { echo "Failed to switch target branch"; exit; }
	git log --pretty=format:"- %s (%an)" "${BASE}..${RELEASE_TAG}" >> ${CHANGELOG}
	popd >/dev/null 2>&1
	echo "" >> ${CHANGELOG}
	echo "" >> ${CHANGELOG}
	sed -i "/%changelog/r ${CHANGELOG}" kernel.spec
	rm -rf ${CHANGELOG}
	echo
	echo "kernel.spec has been update"
	##echo "---"
	##git diff kernel.spec
	##echo "---"
}

function archive_kernel() {
	pushd ${CK_DIR} >/dev/null 2>&1
	git archive --format=tar --prefix="linux-${RELEASE_TAG}.${DIST}/" HEAD |xz -T$(nproc) > linux-${RELEASE_TAG}.${DIST}.tar.xz
	mv linux-${RELEASE_TAG}.${DIST}.tar.xz ../anck-build/
	popd >/dev/null 2>&1
}

if [ $# -lt 2 ]; then
	echo "Invalid args!"
	echo "Usage: $(basename -- $0) 25_rc2 25"
	exit
fi

echo "Update the kernel.spec..."
update_spec
echo "Create the kernel source tar ball..."
archive_kernel
echo "Done."