Freezed: Integration with flutter `builders` in pubspec.yaml

[samandmoore]

Hi there. Thanks for this library. It's great.

I am curious if you know how to get this set up to automatically run the codegen builder in when flutter hot-reloads happen. I tried following this documentation but the files are never being generated.

I have this in my pubspec.yaml:

builders:
  freezed: ^0.10.1

And I have no build.yaml file. It's my understanding that I should only need that builders entry since freezed ships with a build.yaml, correct?

I'm basing this approach on this documentation for functional_widget https://github.com/rrousselGit/functional_widget/blob/30581a3698cb47d65f55a4f96765ed763e6622e2/README.md#install-builder

Thank you for any help you can provide.

[samandmoore]

Note: I have been able to use freezed just fine with build_runner via the CLI, but I'm interested in seeing if I can get the flutter-suggested builders approach working instead.

[samandmoore]

to make this easier to investigate, i created an example app, here https://github.com/samandmoore/freezedgen-example

and here's the error i see when running flutter run

generating build script...                                         29.5s
starting build daemon...                                            1.0s
Launching lib/main.dart on iPhone 11 Pro Max in debug mode...
starting build daemon...

Compiler message:
org-dartlang-app:/main.dart:4:6: Error: Error when reading 'org-dartlang-app:/main.freezed.dart': File not found
part 'main.freezed.dart';
     ^
org-dartlang-app:/main.dart:4:6: Error: Can't use 'org-dartlang-app:/main.freezed.dart' as a part, because it has no 'part of' declaration.
part 'main.freezed.dart';
     ^
org-dartlang-app:/main.dart:7:27: Error: Type '_$Thing' not found.
abstract class Thing with _$Thing {
                          ^^^^^^^
org-dartlang-app:/main.dart:7:16: Error: The type '_$Thing' can't be mixed in.
abstract class Thing with _$Thing {
               ^
org-dartlang-app:/main.dart:8:35: Error: Couldn't find constructor '_Initial'.
  const factory Thing.initial() = _Initial;
                                  ^
org-dartlang-app:/main.dart:8:35: Error: Redirection constructor target not found: '_Initial'
  const factory Thing.initial() = _Initial;
                                  ^
Target kernel_snapshot failed: Exception: Errors during snapshot creation: null
Failed to build bundle.
Error launching application on iPhone 11 Pro Max.

[rrousselGit]

I'm not quite sure what to do here.

From my understanding, it is more the tooling that is unreliable than the generator that have a bug.
The generator configuration is standard

[maks]

@rrousselGit you are correct, there's nothing you need to do as a builder author, its a setting that Flutter users can choose but its known to be currently broken 😞
so I think this issue can be closed.