执行build_runner命令报错：ClassDeclaration无macroKeyword getter

错误详情 #

执行build_runner命令时出现以下构建错误：

Failed to build build_runner:build_runner:
../../.pub-cache/hosted/pub.dev/dart_style-2.3.5/lib/src/front_end/ast_node_visitor.dart:251:16: Error: The getter 'macroKeyword' isn't defined for the class 'ClassDeclaration'.
  - 'ClassDeclaration' is from 'package:analyzer/src/dart/ast/ast.dart' ('../../.pub-cache/hosted/pub.dev/analyzer-6.2.0/lib/src/dart/ast/ast.dart').
Try correcting the name to the name of an existing getter, or defining a getter or field named 'macroKeyword'.
          node.macroKeyword,
                ^^^^^^^^^^^^
../../.pub-cache/hosted/pub.dev/dart_style-2.3.5/lib/src/source_visitor.dart:595:19: Error: The getter 'macroKeyword' isn't defined for the class 'ClassDeclaration'.
  - 'ClassDeclaration' is from 'package:analyzer/src/dart/ast/ast.dart' ('../../.pub-cache/hosted/pub.dev/analyzer-6.2.0/lib/src/dart/ast/ast.dart').
Try correcting the name to the name of an existing getter, or defining a getter or field named 'macroKeyword'.
    modifier(node.macroKeyword);
                  ^^^^^^^^^^^^

问题原因 #

dart_style 2.3.5版本与analyzer 6.2.0版本不兼容：dart_style代码中引用了ClassDeclaration类的macroKeyword属性，但analyzer 6.x版本已经移除了该属性，导致构建时找不到对应 getter。

解决步骤 #

• 更新dart_style到兼容版本：在项目的pubspec.yaml中指定dart_style的版本至少为2.3.6（该版本修复了与analyzer 6.x的兼容问题），示例：

  dev_dependencies:
    dart_style: ^2.3.6
  

• 清理缓存并重新拉取依赖：

  dart pub cache clean
  dart pub get
  

• 重新运行build_runner：

  dart run build_runner build
  

内容的提问来源于stack exchange，提问作者Code Hunter