Need help adding a new parameter to freezed

[Aurangseb]

I am adding a new feature to freezed for generating Firebase converter helper functions. The code generation works fine, but adding a new boolean switch to the annotation is troublesome.

After adding the new parameter to the data class in freezed/lib/src/models.dart:

@freezed
class Data with _$Data {
  @Assert('constructors.isNotEmpty')
  factory Data({
    ...
    required bool generateFirebaseHelpers,
  }) = _Data;
}

Since building the freezed package depends on freezed itself, running the build-runner results in an error:

PS C:\Users\Aurangseb\Documents\projects\freezedWithFbConverter\packages\freezed> fvm flutter pub run build_runner build --delete-conflicting-outputs 
[INFO] Generating build script...
[INFO] Generating build script completed, took 453ms

[INFO] Precompiling build script......
[WARNING] lib/src/models.dart:96:8: Error: The constructor function type '_Data Function({List<String> concretePropertiesName, List<ConstructorDetails> constructors, bool generateCopyWith, bool generateEqual, bool generateFromJson, bool generateToJson, bool generateToString, bool genericArgume
ntFactories, GenericsDefinitionTemplate genericsDefinitionTemplate, GenericsParameterTemplate genericsParameterTemplate, bool makeCollectionsImmutable, MapConfig map, String name, bool shouldUseExtends, String unionKey, WhenConfig when})' isn't a subtype of 'Data Function({List<String> concret
ePropertiesName, List<ConstructorDetails> constructors, bool generateCopyWith, bool generateEqual, bool generateFirebaseHelpers, bool generateFromJson, bool generateToJson, bool generateToString, bool genericArgumentFactories, GenericsDefinitionTemplate genericsDefinitionTemplate, GenericsPara
meterTemplate genericsParameterTemplate, bool makeCollectionsImmutable, MapConfig map, String name, bool shouldUseExtends, String unionKey, WhenConfig when})'.
 - '_Data' is from 'package:freezed/src/models.dart' ('lib/src/models.dart').
 - 'List' is from 'dart:core'.
 - 'ConstructorDetails' is from 'package:freezed/src/models.dart' ('lib/src/models.dart').
 - 'GenericsDefinitionTemplate' is from 'package:freezed/src/templates/parameter_template.dart' ('lib/src/templates/parameter_template.dart').
 - 'GenericsParameterTemplate' is from 'package:freezed/src/templates/parameter_template.dart' ('lib/src/templates/parameter_template.dart').
 - 'MapConfig' is from 'package:freezed/src/models.dart' ('lib/src/models.dart').
 - 'WhenConfig' is from 'package:freezed/src/models.dart' ('lib/src/models.dart').
 - 'Data' is from 'package:freezed/src/models.dart' ('lib/src/models.dart').
  }) = _Data;

How can I generate models.freezed.dart without the build runner failing here?

[rrousselGit]

models.freezed.dart is edited in the _internal folder. Make your edit there, and copy the generated file in Freezed.