protoc-gen-go: unable to determine Go import path for "xxx.proto"

問題

$ protoc --go_out=. *.proto
protoc-gen-go: unable to determine Go import path for "xxx.proto"

Please specify either:
        • a "go_package" option in the .proto source file, or
        • a "M" argument on the command line.

See https://developers.google.com/protocol-buffers/docs/reference/go-generated#package for more information.

--go_out: protoc-gen-go: Plugin failed with status code 1.

解決方法

提示以上錯誤可以通過將protoc-gen-go版本降至v1.3.2及以下解決：

go get -u github.com/golang/protobuf/protoc-gen-go@v1.3.2