Protoc gen go error inconsistent package import paths

Trying to build Go definitions for github.com/tensorflow/tensorflow (off the r1.15.0 tag, if it matters):

protoc 
       -I./github.com/tensorflow/tensorflow 
       --go_out=plugins=grpc:./ 
       ./github.com/tensorflow/tensorflow/tensorflow/core/framework/*.proto
protoc 
       -I./github.com/tensorflow/tensorflow 
       --go_out=plugins=grpc:./ 
       ./github.com/tensorflow/tensorflow/tensorflow/core/protobuf/{saver,saved_model,struct,trackable_object_graph,saved_object_graph,meta_graph}.proto

gives the error:

2019/11/07 14:43:01 protoc-gen-go: error:inconsistent package import paths: "github.com/tensorflow/tensorflow/tensorflow/go/core/protobuf", "tensorflow/core/protobuf"

If I try using loads of M arguments, the error goes away, but I get files written both to github.com/tensorflow/tensorflow/tensorflow/go/core/protobuf and tensorflow/core/protobuf.

protoc 
       -I./github.com/tensorflow/tensorflow 
       --go_out=plugins=grpc,Mtensorflow/core/protobuf/saved_object_graph.proto=github.com/tensorflow/tensorflow/tensorflow/go/core/protobuf,Mtensorflow/core/protobuf/struct.proto=github.com/tensorflow/tensorflow/tensorflow/go/core/protobuf,Mtensorflow/core/protobuf/trackable_object_graph.proto=github.com/tensorflow/tensorflow/tensorflow/go/core/protobuf:./ 
       ./github.com/tensorflow/tensorflow/tensorflow/core/protobuf/{saver,saved_model,struct,trackable_object_graph,saved_object_graph,meta_graph}.proto

That leads to a Go compilation failure:

src/github.com/tensorflow/tensorflow/tensorflow/go/core/protobuf/meta_graph.pb.go:54:24: undefined: SavedObjectGraph

That type was written to the tensorflow/core/protobuf/saved_object_graph.pb.go file with an import back into github.com/tensorflow/tensorflow/tensorflow/go/core/framework.

If I add a go_package to these three files, everything is emitted into github.com/tensorflow/tensorflow/tensorflow/go/core.

• tensorflow/core/protobuf/saved_object_graph.proto
• tensorflow/core/protobuf/struct.proto
• tensorflow/core/protobuf/trackable_object_graph.proto

option go_package = "github.com/tensorflow/tensorflow/tensorflow/go/core/protobuf";

My question is: What is the recommended way to generate all the Go files into one package hierarchy? Should I need to modify the source? I’m unclear if there is a problem with my protoc command, with proto-gen-go, or with the TensorFlow code.

syntax="proto3";

package main;

message Person {
      string name = 1;
      int32 age = 2; 
}

protoc --go_out=. simple.proto

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

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

3 ответа

Лучший ответ

option go_package = "./";

sudo apt install protobuf-compiler
sudo apt install golang-goprotobuf-dev

protoc -I=src/ --go_out=src/ src/simple.proto

Topic: Errors I encountered when working with gRPC (Part 1)

Introduce

I am a newbie working with gRPC. The experiences are almost zero. This is the series of articles I will write about the errors I encountered when I started learning about gRPC. Hopefully other new friends like me if having the same error can save time.

Content

1. Error writing generate code from .proto file
When I generate the client/server stubs file, use the protoc command as follows:

The last line is the path of the proto file we want to generate code from. Flag “go_out” yourself to “.” The purpose is for the generated code to be in the directory with the proto file. Above, I used more flags –go_opt=paths=source_relative ie when the code is generated, we can import the package of this code in the main.go file according to the path declared above. Here I use source_relative, it will implicitly be the path of the .proto file. After running the above command, I get the following error:
protoc-gen-go: unable to determine Go import path for "ecommerce/product_info.proto" What is the cause? As we have worked with golang, Gopath is extremely important to determine the path of packages. Here we can use go.mod to be able to work in any directory outside of Gopath. The above error means that when we generate code from the product_info.proto file, we need to import some more packages or dependencies of the file to be imported to generate the file. So it needs to determine our Gopath in the local machine.
Fix to add paragraph
option go_package = "Your Gopath";
Go to the .proto file and you’re done.
After generating the code successfully, you may encounter a package could not import error in the newly generated .go file, you will fix it by calling “go get name_package”.

Kết Luận

Ok finished an error today. This is a very basic error but it will take a lot of time if it is a golang and gRPC fuzzy chicken like me. Wish you all good study