Fix grpc build

Author: gnufied

lib/go/Makefile

@@ -69,6 +69,24 @@ $(PROTOC_GEN_GO):
 	go build -o "$@" $(PROTOC_GEN_GO_PKG)
 
 
+########################################################################
+##                          GRPC-GO-PKG                               ##
+########################################################################
+
+# This is the recipe for getting and installing the grpc-go
+GRPC_GO_PKG := github.com/grpc/grpc-go
+GRPC_INSTALL_GO := grpc-go
+$(GRPC_INSTALL_GO): GRPC_PKG := $(dir $(GRPC_GO_PKG))
+$(GRPC_INSTALL_GO): GRPC_VERSION := v1.29.1
+$(GRPC_INSTALL_GO):
+	mkdir -p $(dir $(GOPATH)/src/$(GRPC_PKG))
+	test -d $(GOPATH)/src/$(GRPC_PKG)/.git || git clone https://$(GRPC_GO_PKG) $(GOPATH)/src/$(GRPC_PKG)
+	(cd $(GOPATH)/src/$(GRPC_PKG) && \
+		(test "$$(git describe --tags | head -1)" = "$(GRPC_VERSION)" || \
+			(git fetch && git checkout tags/$(GRPC_VERSION))))
+	(cd $(GOPATH)/src/$(GRPC_PKG) && go get -v -d $$(go list -f '{{ .ImportPath }}' ./...))
+
+
 ########################################################################
 ##                              PATH                                  ##
 ########################################################################
@@ -119,7 +137,7 @@ endif
 #   1. Go get any missing dependencies.
 #   2. Cache the packages.
 #   3. Build the archive file.
-$(CSI_A): $(CSI_GO)
+$(CSI_A): $(CSI_GO) $(GRPC_INSTALL_GO)
 	go get -v -d ./...
 	go install ./$(CSI_PKG_SUB)
 	go build -o "$@" ./$(CSI_PKG_SUB)
@@ -133,4 +151,4 @@ clean:
 clobber: clean
 	rm -fr "$(PROTOC)" "$(PROTOC_GEN_GO)" "$(CSI_PKG_SUB)"
 
-.PHONY: clean clobber
+.PHONY: clean clobber $(GRPC_INSTALL_GO)