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docs: salvage zh-CN command translations
Port the current-source-safe command documentation subset from stale PR #1687.\n\nEach copied command page maps to an English source file unchanged since the stale PR base; fastapi-review remains deferred because #1687 did not include a matching zh-CN translation.
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Affaan Mustafa
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docs/zh-CN/commands/flutter-build.md
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166
docs/zh-CN/commands/flutter-build.md
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---
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description: 逐步修复 Dart 分析器错误和 Flutter 构建失败。调用 dart-build-resolver 代理进行最小化的精准修复。
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---
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# Flutter 构建与修复
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此命令调用 **dart-build-resolver** 代理,以最小改动增量修复 Dart/Flutter 构建错误。
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## 命令功能
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1. **运行诊断**:执行 `flutter analyze`、`flutter pub get`
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2. **解析错误**:按文件分组并按严重性排序
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3. **增量修复**:每次修复一个错误
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4. **验证每次修复**:每次更改后重新运行分析
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5. **报告摘要**:显示已修复内容和剩余问题
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## 使用时机
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在以下情况使用 `/flutter-build`:
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* `flutter analyze` 报告错误
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* `flutter build` 在任何平台失败
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* `dart pub get` / `flutter pub get` 因版本冲突失败
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* `build_runner` 代码生成失败
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* 拉取更改后导致构建中断
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## 运行的诊断命令
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```bash
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# Analysis
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flutter analyze 2>&1
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# Dependencies
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flutter pub get 2>&1
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# Code generation (if project uses build_runner)
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dart run build_runner build --delete-conflicting-outputs 2>&1
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# Platform builds
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flutter build apk 2>&1
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flutter build web 2>&1
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```
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## 示例会话
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````text
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用户:/flutter-build
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代理:
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# Flutter 构建问题解决
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## 初始诊断
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```
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$ flutter analyze
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分析项目中...
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error • lib/features/user/data/user_repository_impl.dart:34:16 •
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类型为 'String?' 的值无法赋值给类型为 'String' 的变量。 •
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invalid_assignment
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error • lib/features/cart/presentation/cart_page.dart:58:5 •
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类型 'List<Item>' 未定义方法 'add'。
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请尝试将名称更正为现有方法的名称,或定义名为 'add' 的方法。 •
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undefined_method
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发现 2 个错误。
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```
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## 修复 1:空安全
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文件:lib/features/user/data/user_repository_impl.dart:34
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错误:类型为 'String?' 的值无法赋值给类型 'String'
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修改前:
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```dart
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final id = response.id;
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```
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修改后:
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```dart
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final id = response.id ?? '';
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```
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```
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$ flutter analyze
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发现 1 个错误。
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```
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## 修复 2:不可变列表
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文件:lib/features/cart/presentation/cart_page.dart:58
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错误:类型 'List<Item>' 未定义方法 'add'
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原因:状态持有不可修改的列表;变更通过 Cubit 进行
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修改前:
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```dart
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state.items.add(item);
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```
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修改后:
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```dart
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context.read<CartCubit>().addItem(item);
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// 注意:Cubit 暴露命名方法(addItem, removeItem);
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// .add(event) 是 BLoC 事件 API — 不要混淆使用。
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```
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```
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$ flutter analyze
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未发现问题!
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```
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## 最终验证
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```
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$ flutter test
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所有测试通过。
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```
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## 总结
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| 指标 | 数量 |
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|--------|-------|
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| 分析错误修复 | 2 |
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| 修改的文件 | 2 |
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| 剩余问题 | 0 |
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构建状态:通过 ✓
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````
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## 常见错误修复
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| 错误 | 典型修复 |
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|-------|-------------|
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| `A value of type 'X?' can't be assigned to 'X'` | 添加 `?? default` 或空值保护 |
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| `The name 'X' isn't defined` | 添加导入或修正拼写错误 |
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| `Non-nullable instance field must be initialized` | 添加初始化器或 `late` |
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| `Version solving failed` | 调整 pubspec.yaml 中的版本约束 |
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| `Missing concrete implementation of 'X'` | 实现缺失的接口方法 |
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| `build_runner: Part of X expected` | 删除过时的 `.g.dart` 并重建 |
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## 修复策略
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1. **优先分析错误** — 代码必须无错误
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2. **其次处理警告** — 修复可能导致运行时错误的警告
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3. **第三解决 pub 冲突** — 修复依赖解析问题
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4. **每次修复一个** — 验证每次更改
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5. **最小改动** — 仅修复,不重构
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## 停止条件
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代理将在以下情况停止并报告:
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* 同一错误在 3 次尝试后仍然存在
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* 修复引入了更多错误
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* 需要架构变更
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* 包升级冲突需要用户决策
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## 相关命令
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* `/flutter-test` — 构建成功后运行测试
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* `/flutter-review` — 审查代码质量
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* `verification-loop` 技能 — 完整验证循环
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## 相关信息
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* 代理:`agents/dart-build-resolver.md`
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* 技能:`skills/flutter-dart-code-review/`
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