使用时可以省略"protobuf package“吗？

Question

我有以下的protobuf文件，我想使用“protobuf-gen”将它们编译成C#。我发现"chassis.proto“可以成功，但"perception_lane.proto”不能。我猜原因是"common.Header"，应该是"apollo.common.Header"：

我用C++编译了bazel，他们没有这个问题。可以使用protoc将Aslo编译成python。问题是protobuf本身是否支持这种用法？或者“protobuf-net”不能识别这样的用法？

header.proto

syntax = "proto2";

package apollo.common;

import "modules/common/proto/error_code.proto";

message Header {

  optional double timestamp_sec = 1;
  ...
}

chassis.proto

syntax = "proto2";

package apollo.canbus;

import "modules/common/proto/header.proto";

message Chassis {
  optional apollo.common.Header header = 19;
}

perception_lane.proto

syntax = "proto2";

package apollo.perception;

import "modules/common/proto/header.proto";


message PerceptionLanes {
    optional common.Header header = 1;
}

我得到的错误信息如下：

C:\01code\protobuf-net-2.3.16\src\protogen\bin\Release\net462>protogen.exe --proto_path=../net462 --csharp_out=gen +names=original +langver=3 modules/perception/proto/perception_lane.proto
modules/perception/proto/perception_lane.proto(9,14,9,27): error: type not found: 'common.Header'
modules/perception/proto/perception_lane.proto(11,14,11,36): error: type not found: 'camera.CameraErrorCode'
modules/perception/proto/perception_lane.proto(12,14,12,37): error: type not found: 'camera.CameraCalibrator'
modules/perception/proto/perception_lane.proto(13,14,13,35): error: type not found: 'camera.CameraLaneLine'
modules/perception/proto/perception_camera.proto(50,14,50,28): error: type not found: 'common.Point2D'
modules/perception/proto/perception_camera.proto(51,14,51,28): error: type not found: 'common.Point2D'
modules/perception/proto/perception_camera.proto(62,14,62,28): error: type not found: 'common.Point3D'
modules/perception/proto/perception_camera.proto(64,14,64,28): error: type not found: 'common.Point2D'
modules/perception/proto/perception_camera.proto(96,14,96,28): error: type not found: 'common.Point2D'
modules/perception/proto/perception_camera.proto(97,14,97,28): error: type not found: 'common.Point2D'
modules/perception/proto/perception_camera.proto(98,14,98,28): error: type not found: 'common.Point2D'
modules/perception/proto/perception_camera.proto(104,14,104,27): error: type not found: 'common.Header'
modules/perception/proto/perception_obstacle.proto(30,12,30,26): error: type not found: 'common.Point3D'
modules/perception/proto/perception_obstacle.proto(36,12,36,26): error: type not found: 'common.Point3D'
modules/perception/proto/perception_obstacle.proto(48,12,48,26): error: type not found: 'common.Point3D'
modules/perception/proto/perception_obstacle.proto(51,12,51,26): error: type not found: 'common.Point3D'
modules/perception/proto/perception_obstacle.proto(58,12,58,26): error: type not found: 'common.Point3D'
modules/perception/proto/perception_obstacle.proto(86,12,86,26): error: type not found: 'common.Point3D'
modules/perception/proto/perception_obstacle.proto(89,12,89,26): error: type not found: 'common.Point3D'
modules/perception/proto/perception_obstacle.proto(93,12,93,26): error: type not found: 'common.Point3D'
modules/perception/proto/perception_obstacle.proto(157,12,157,25): error: type not found: 'common.Header'
modules/perception/proto/perception_obstacle.proto(158,12,158,28): error: type not found: 'common.ErrorCode'
modules/perception/proto/perception_lane.proto(5,8,5,41): warning: import not used: 'modules/common/proto/header.proto'
modules/perception/proto/perception_lane.proto(6,8,6,56): warning: import not used: 'modules/perception/proto/perception_camera.proto'

Answer 1

这听起来很像protobuf-net.Reflect中名称解析的错误；最好登录GitHub并提供足够的信息来重现它(理想情况下是最小的！)。或者更好:您可以使用fork、fix和PR :)

作为一种变通办法，您可以尝试在模式中使用完全限定名称(从.开始)。例如，Empty是.google.protobuf.Empty IIRC。