Generate files in submodules, not only in root package

In our team we have a multi-package application using Objectbox. For a while we had Objectbox and all classes using it in a root package. Now we want to decouple all of that for root package and move to one of our dependencies.

As you know, Objectbox uses generated files to work. In our case we run build_runner in root_package with the following build.yaml file content:

targets:
  $default:
    sources:
      - modules/**
      - lib/**
      - test/**
      # Note that it is important to include these in the default target.
      - pubspec.*
      - $package$

This allows us to run build_runner only once and have files generated in all our modules (sub-packages). objectbox_generator:resolver handles this nicely as *.objectbox.info files are being generated for our files. objectbox_generator:generator doesn't generate outputs though.

As I see in the generator's source code, It handles files only present in lib of current package, though files of submodules are accessible from buildStep.

Is this behaviour intentional or this can be changed in the future to use files from packages too?

Start with the objectbox_generator:generator source and compare its handling of files under lib with the resolver's *.objectbox.info outputs. Use the supplied build.yaml and buildStep context to investigate submodule inputs. Done means generated ObjectBox files are produced for eligible files in dependency packages while existing root-package generation remains functional.