Encode ulids as protobuf directly.

Usage

1. Import the proto file in your proto code

   mymessage.proto:

   syntax = "proto3";
   
   package mypackage;
   
   import "ulid.proto";
   
   option go_package = "example.org/mypackage";
   
   message MyMessage {
     ulid.ULID id = 1;
   }
   

2. Add this library to your code:

   $ go get github.com/exaring/ulid-protobuf@latest
   

3. Then compile your proto files with protoc, e.g.:

   $ protoc --proto_path=$(go list -m -f '{{.Dir}}' github.com/exaring/ulid-protobuf) \
            --go_out=paths=source_relative:. \
            --proto_path=. ./mymessage.proto
   

   Note the trick with --proto_path: it allows protoc to find the ulid.proto file inside the go module's source.

4. Use ULIDs in you code:

   // send ULIDs as protobuf
   msg := &MyMessage{
     Id: ulidpb.FromULID(ulid.Make()),
   }
   
   // receive ULIDs from protobuf
   u := msg.Id.AsULID()