Flutter 如何按扩展筛选生成运行程序输入？

我正在尝试使用Dart的自定义生成器

builder.dart

中的buildExtensions是

.dart

  functionUnwrap:
    import: 'package:my_generators/my_generators.dart'
    builder_factories: ['functionUnwrapBuild']
    auto_apply: dependents
    build_extensions: {".source.dart": [".unwrapped.dart"]}
    build_to: source
    applies_builders: ["source_gen"]

它为任何dart文件生成

buildExtensions={.dart'：[generatedExtension]…addAll（additionalOutputExtensions）}，

因此，即使在build.yaml中，我也将构建输入设置为

.source.dart

  functionUnwrap:
    import: 'package:my_generators/my_generators.dart'
    builder_factories: ['functionUnwrapBuild']
    auto_apply: dependents
    build_extensions: {".source.dart": [".unwrapped.dart"]}
    build_to: source
    applies_builders: ["source_gen"]

它忽略

“.source.dart”

，并且仍然在任何dart文件上运行