This is a local file simple sync lib.
Please see client.go in the example sub dir.
protoc --go_out=plugins=grpc:. *.proto
=== https://github.com/google/protobuf/releases ./configure;make;make install
go get github.com/golang/protobuf/protoc-gen-go
cd github.com/golang/protobuf/protoc-gen-go
go build
go install or cp -f protoc-gen-go /usr/local/go/bin