add rpm target in Makefile

shim/Makefile

@@ -4,6 +4,11 @@ ROOTDIR=$(dir $(abspath $(lastword $(MAKEFILE_LIST))))
 # Base path used to install.
 DESTDIR ?= /usr/local
 
+# Variables for building rpm
+VERSION ?= 0.2.0
+RELEASE_TARBALL_URL ?= https://github.com/alibaba/inclavare-containers/archive/v$(VERSION).tar.gz
+RPMBUILD_DIR ?= /tmp/inclavare-containers/shim/rpmbuild
+
 ifneq "$(strip $(shell command -v go 2>/dev/null))" ""
 	GOOS ?= $(shell go env GOOS)
 	GOARCH ?= $(shell go env GOARCH)
@@ -39,7 +44,7 @@ SHIM_CGO_ENABLED ?= 0
 
 BINARIES=$(addprefix bin/,$(COMMANDS))
 
-.PHONY: clean all build binaries help install uninstall
+.PHONY: clean all binaries help install uninstall rpm
 .DEFAULT: default
 
 all: binaries
@@ -49,11 +54,19 @@ bin/containerd-shim-rune-v2:
 	@echo "bin/containerd-shim-rune-v2"
 	@CGO_ENABLED=${SHIM_CGO_ENABLED} GOOS=${GOOS} go build ${GO_BUILD_FLAGS} -o bin/containerd-shim-rune-v2 ./cmd/containerd-shim-rune-v2
 
-binaries: $(BINARIES) ## build binaries
+binaries: clean $(BINARIES) ## build binaries
 
 clean: ## clean up binaries
 	@echo "$@"
 	@rm -f $(BINARIES)
+	@rm -fr ${RPMBUILD_DIR}
+
+rpm:
+	@mkdir -p $(RPMBUILD_DIR)
+	@echo "%_topdir $(RPMBUILD_DIR)" >> ~/.rpmmacros
+	@mkdir -p $(RPMBUILD_DIR)/{BUILD,RPMS,SOURCES,SPECS,SRPMS}
+	@wget -P $(RPMBUILD_DIR)/SOURCES $(RELEASE_TARBALL_URL)
+	$(MAKE) -C dist/centos rpm RPMBUILD_DIR=$(RPMBUILD_DIR)
 
 install: ## install binaries
 	@echo "$@ $(BINARIES)"