Update release scripts for release-3.4

Signed-off-by: Benjamin Wang <wachao@vmware.com>

scripts/build-binary.sh

@@ -0,0 +1,97 @@
+#!/usr/bin/env bash
+
+set -e
+
+VER=$1
+PROJ="etcd"
+
+if [ -z "$1" ]; then
+	echo "Usage: ${0} VERSION" >> /dev/stderr
+	exit 255
+fi
+
+set -u
+
+function setup_env {
+	local proj=${1}
+	local ver=${2}
+
+	if [ ! -d "${proj}" ]; then
+		git clone https://github.com/etcd-io/"${proj}"
+	fi
+
+	pushd "${proj}" >/dev/null
+		git checkout main
+		git fetch --all
+		git reset --hard origin/main
+		git checkout "${ver}"
+	popd >/dev/null
+}
+
+
+function package {
+	local target=${1}
+	local srcdir="${2}/bin"
+
+	local ccdir="${srcdir}/${GOOS}_${GOARCH}"
+	if [ -d "${ccdir}" ]; then
+		srcdir="${ccdir}"
+	fi
+	local ext=""
+	if [ "${GOOS}" == "windows" ]; then
+		ext=".exe"
+	fi
+	for bin in etcd etcdctl; do
+		cp "${srcdir}/${bin}" "${target}/${bin}${ext}"
+	done
+
+	cp etcd/README.md "${target}"/README.md
+	cp etcd/etcdctl/README.md "${target}"/README-etcdctl.md
+	cp etcd/etcdctl/READMEv2.md "${target}"/READMEv2-etcdctl.md
+
+	cp -R etcd/Documentation "${target}"/Documentation
+}
+
+function main {
+	mkdir release
+	cd release
+	setup_env "${PROJ}" "${VER}"
+
+	tarcmd=tar
+	if [[ $(go env GOOS) == "darwin" ]]; then
+		echo "Please use linux machine for release builds."
+		exit 1
+	fi
+
+	for os in darwin windows linux; do
+		export GOOS=${os}
+		TARGET_ARCHS=("amd64")
+
+		if [ ${GOOS} == "linux" ]; then
+			TARGET_ARCHS+=("arm64")
+			TARGET_ARCHS+=("ppc64le")
+		fi
+
+		for TARGET_ARCH in "${TARGET_ARCHS[@]}"; do
+			export GOARCH=${TARGET_ARCH}
+
+			pushd etcd >/dev/null
+			GO_LDFLAGS="-s" ./build
+			popd >/dev/null
+
+			TARGET="etcd-${VER}-${GOOS}-${GOARCH}"
+			mkdir "${TARGET}"
+			package "${TARGET}" "${PROJ}"
+
+			if [ ${GOOS} == "linux" ]; then
+				${tarcmd} cfz "${TARGET}.tar.gz" "${TARGET}"
+				echo "Wrote release/${TARGET}.tar.gz"
+			else
+				zip -qr "${TARGET}.zip" "${TARGET}"
+				echo "Wrote release/${TARGET}.zip"
+			fi
+		done
+	done
+}
+
+main