Centos-kernel-stream-9/redhat/scripts/create-tarball.sh

#!/bin/sh

GITID=$1
TARBALL=$2
DIR=$3

XZ_THREADS=`rpm --eval %{_smp_mflags} | sed -e 's!^-j!--threads !'`

ARCH=`arch`
XZ_OPTIONS=""

if [ "$ARCH" != "x86_64" ]
then
        XZ_OPTIONS="-M 3G"
fi

if [ -f ${TARBALL} ]; then
	TARID=`( xzcat -qq ${TARBALL} | git get-tar-commit-id ) 2>/dev/null`
	GITID_NORMALIZE=`git log --max-count=1 --pretty=format:%H ${GITID}`
	if [ "${GITID_NORMALIZE}" = "${TARID}" ]; then
		echo "`basename ${TARBALL}` unchanged..."
		exit 0
	fi
	rm -f ${TARBALL}
fi

echo "Creating `basename ${TARBALL}`..."
trap 'rm -vf ${TARBALL}' INT
cd ../ &&
  git archive --prefix=${DIR}/ --format=tar ${GITID} | xz ${XZ_OPTIONS} ${XZ_THREADS} > ${TARBALL};