protoc生成go文件命令错误

写完rpc service后  用 protoc -I=. --go_out=plugins=grpc,paths=source_relative:gen/go trip.proto  生成过文件报错了--go_out: protoc-gen-go: plugins are not supported; use 'protoc --go-grpc_out=...' to generate gRPC

按照提示 我把命令换成了  protoc  --go-grpc_out=gen/go --go-grpc_opt=paths=source_relative trip.proto   但是这个命令生成的go文件 里边有service 没有message

trip_grpc.pb.go：

// Code generated by protoc-gen-go-grpc. DO NOT EDIT.

package trippb

import (
context "context"
   grpc "google.golang.org/grpc"
   codes "google.golang.org/grpc/codes"
   status "google.golang.org/grpc/status"
)

// This is a compile-time assertion to ensure that this generated file
// is compatible with the grpc package it is being compiled against.
// Requires gRPC-Go v1.32.0 or later.
const _ = grpc.SupportPackageIsVersion7

// TripServiceClient is the client API for TripService service.
//
// For semantics around ctx use and closing/ending streaming RPCs, please refer to https://pkg.go.dev/google.golang.org/grpc/?tab=doc#ClientConn.NewStream.
type TripServiceClient interface {
GetTrip(ctx context.Context, in *GetTripRequest, opts ...grpc.CallOption) (*GetTripResponse, error)
}

type tripServiceClient struct {
   cc grpc.ClientConnInterface
}

func NewTripServiceClient(cc grpc.ClientConnInterface) TripServiceClient {
return &tripServiceClient{cc}
}

func (c *tripServiceClient) GetTrip(ctx context.Context, in *GetTripRequest, opts ...grpc.CallOption) (*GetTripResponse, error) {
   out := new(GetTripResponse)
   err := c.cc.Invoke(ctx, "/coolcar.TripService/GetTrip", in, out, opts...)
if err != nil {
return nil, err
   }
return out, nil
}

// TripServiceServer is the server API for TripService service.
// All implementations must embed UnimplementedTripServiceServer
// for forward compatibility
type TripServiceServer interface {
GetTrip(context.Context, *GetTripRequest) (*GetTripResponse, error)
mustEmbedUnimplementedTripServiceServer()
}

// UnimplementedTripServiceServer must be embedded to have forward compatible implementations.
type UnimplementedTripServiceServer struct {
}

func (UnimplementedTripServiceServer) GetTrip(context.Context, *GetTripRequest) (*GetTripResponse, error) {
return nil, status.Errorf(codes.Unimplemented, "method GetTrip not implemented")
}
func (UnimplementedTripServiceServer) mustEmbedUnimplementedTripServiceServer() {}

// UnsafeTripServiceServer may be embedded to opt out of forward compatibility for this service.
// Use of this interface is not recommended, as added methods to TripServiceServer will
// result in compilation errors.
type UnsafeTripServiceServer interface {
mustEmbedUnimplementedTripServiceServer()
}

func RegisterTripServiceServer(s grpc.ServiceRegistrar, srv TripServiceServer) {
   s.RegisterService(&TripService_ServiceDesc, srv)
}

func _TripService_GetTrip_Handler(srv interface{}, ctx context.Context, dec func(interface{}) error, interceptor grpc.UnaryServerInterceptor) (interface{}, error) {
   in := new(GetTripRequest)
if err := dec(in); err != nil {
return nil, err
   }
if interceptor == nil {
return srv.(TripServiceServer).GetTrip(ctx, in)
   }
   info := &grpc.UnaryServerInfo{
      Server:     srv,
      FullMethod: "/coolcar.TripService/GetTrip",
   }
   handler := func(ctx context.Context, req interface{}) (interface{}, error) {
return srv.(TripServiceServer).GetTrip(ctx, req.(*GetTripRequest))
   }
return interceptor(ctx, in, info, handler)
}

// TripService_ServiceDesc is the grpc.ServiceDesc for TripService service.
// It's only intended for direct use with grpc.RegisterService,
// and not to be introspected or modified (even as a copy)
var TripService_ServiceDesc = grpc.ServiceDesc{
   ServiceName: "coolcar.TripService",
   HandlerType: (*TripServiceServer)(nil),
   Methods: []grpc.MethodDesc{
      {
         MethodName: "GetTrip",
         Handler:    _TripService_GetTrip_Handler,
      },
   },
   Streams:  []grpc.StreamDesc{},
   Metadata: "trip.proto",
}