For Ruby
install ruby gems
gem install grpc
gem install grpc-tools
For Elixir
brew install protobuf
mix escript.install hex protobuf
then see the results and add protoc-gen-elixir
to your PATH
generate the ruby files
grpc_tools_ruby_protoc -I ./protos --ruby_out=./ruby/proto/lib/proto --grpc_out=./ruby/proto/lib/proto ./protos/*/*.proto
generate the elixir files
protoc -I ./protos --elixir_out=./elixir/lib/elixir ./protos/*/*.proto