Typescript type hints fail when importing protobuf

[briggySmalls]

I have tried to switch from using improbable-eng/grpc-web for typescript hints, to this repo. As far as I can see, the type hinting doesn't support protobuf definitions that import other protobuf definitions.

The issue can be reproduced with the following minimal protobuf examples:

// file: a.proto

syntax = "proto3";

package a;

// Import the other protobuf
import "b.proto";

service AService {
    rpc GetInfo (b.BRequest) returns (b.BResponse);
}

// file: b.proto

syntax = "proto3";

package b;

message BRequest {
}

message BResponse {
}

Then running the command:

protoc \
	-I . \
	--js_out=import_style=commonjs:. \
	--grpc-web_out=import_style=commonjs+dts,mode=grpcwebtext:. \
	a.proto b.proto

Results in all the correct files being produced. However the imports in the type information file incorrectly target a.proto for the messages defined in b.proto:

// a_grpc_web_pb.d.ts

...
import {
  BRequest,
  BResponse} from './a_pb';
...

p.s. Thanks for the most awesome tool 🙏