Is it possible to create a builder that requires files generated by other builder_runners?

[lcdsmao]

Dart SDK Version (dart --version)

Dart SDK version: 2.10.5 (stable) (Tue Jan 19 13:05:37 2021 +0100) on "macos_x64"

What package(s) from this repo you are using, and the version (i.e. build_runner 0.7.12)

• If you are not sure, try checking your pubspec.lock file.

dependencies:
  build: ^1.3.0
  json_annotation: ^3.1.1

dev_dependencies:
  build_runner: ^1.11.0
  json_serializable: ^3.5.1

What builder(s) you are using (or writing yourself). Try to give a short summary of what they do.

Sample repo: https://github.com/lcdsmao/custom-builder-with-build-runner

A builder that import file that needs part generated by json_serializable.

• builder: https://github.com/lcdsmao/custom-builder-with-build-runner/blob/main/lib/build.dart
• import file: https://github.com/lcdsmao/custom-builder-with-build-runner/blob/main/lib/src/example.dart

When executing dart pub run build_runner build, the following error occurs:

[SEVERE] Failed to snapshot build script .dart_tool/build/entrypoint/build.dart.
This is likely caused by a misconfigured builder definition.
[SEVERE] lib/src/example.dart:3:6: Error: Error when reading 'lib/src/example.g.dart': No such file or directorypart 'example.g.dart';     ^lib/src/example.dart:3:6: Error: Can't use 'lib/src/example.g.dart' as a part, because it has no 'part of' declaration.part 'example.g.dart';     ^lib/src/example.dart:11:57: Error: Method not found: '_$PersonFromJson'.  factory Person.fromJson(Map<String, dynamic> json) => _$PersonFromJson(json);                                                        ^^^^^^^^^^^^^^^^lib/src/example.dart:12:36: Error: The method '_$PersonToJson' isn't defined for the class 'Person'. - 'Person' is from 'package:builder_test/src/example.dart' ('lib/src/example.dart').Try correcting the name to the name of an existing method, or defining a method named '_$PersonToJson'.  Map<String, dynamic> toJson() => _$PersonToJson(this);                                   ^^^^^^^^^^^^^^

If I comment out the import import 'src/example.dart';, then example.g.dart can be generated successfully.

[jakemac53]

There is no supported way of doing this today - you can move the generated files to another package which is the easiest way to deal with it.

Closing as we don't have any actionable plan to deal with this - we do face the same problem in our own repos as well fwiw but there just isn't a good solution we have come up with to manage it.