protocol-buffersgrpc-goprotobuf-go

protobuf validator command generates file in wrong path

I am trying to include request validation for grpc. I modified the protobuf command like this. pkg/test/test.proto contains my schema.

If i run the below command :

protoc --go_out=. \
--proto_path=${GOPATH}/src \
--proto_path=${GOPATH}/src/github.com/gogo/protobuf/gogoproto/ \
--proto_path=${GOPATH}/src/github.com/mwitkow/go-proto-validators/ \
--proto_path=. \ --go_opt=paths=source_relative --go-grpc_out=. --go-grpc_opt=paths=source_relative pkg/test/test.proto --govalidators_out=.

The validator.go file generated file is not generated inside pkg/test instead it is getting generated inside a new folder created {source relative pkg}/pkg/test/test.proto/validator.go.

How to generate validator.go file without the folder structure in pkg/test?

Solution

  • Analysis

    It looks like the *.validator.pb.go files are generated in the wrong directory.

    Using the pkg/test/test.proto file with the following content:

    syntax = "proto3";

option go_package = "github.com/example-user/example-repository";

service Greeter {
  rpc SayHello (HelloRequest) returns (HelloReply) {}
}

message HelloRequest {
  string name = 1;
}

message HelloReply {
  string message = 1;
}

    Produced the file system contents:

    $ find .
.
./github.com
./github.com/example-user
./github.com/example-user/example-repository
./github.com/example-user/example-repository/test.validator.pb.go
./pkg
./pkg/test
./pkg/test/test_grpc.pb.go
./pkg/test/test.proto
./pkg/test/test.pb.go

    Solution

    Add the --govalidators_opt=paths=source_relative command line argument.

    Please, note the parameter name:

    --govalidators_opt

    The complete command line:

    protoc --go_out=. \
    --proto_path=. \
    --go_opt=paths=source_relative \
    --go-grpc_out=. \
    --go-grpc_opt=paths=source_relative \
    --govalidators_out=. \
    --govalidators_opt=paths=source_relative \
    pkg/test/test.proto

    Produced the file system contents:

    $ find .
.
./pkg
./pkg/test
./pkg/test/test_grpc.pb.go
./pkg/test/test.proto
./pkg/test/test.pb.go
./pkg/test/test.validator.pb.go

    Additional references