influxdb/docs/proto.md

download a binary here https://github.com/google/protobuf/releases/tag/v3.1.0

run the following 4 commands listed here https://github.com/gogo/protobuf

go get github.com/gogo/protobuf/proto
go get github.com/gogo/protobuf/jsonpb
go get github.com/gogo/protobuf/protoc-gen-gogo
go get github.com/gogo/protobuf/gogoproto

now, you can regenerate the .proto file: protoc --gogo_out=. internal.proto