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AWS SAM CLI 新增对 AWS CloudFormation 语言扩展的支持,助力加速本地无服务器开发
Amazon Web Services · 2026-05-19 · via Recent Announcements

AWS SAM CLI 现在支持 AWS CloudFormation 语言扩展,使您能够减少基础设施即代码(IaC)模板中的重复内容,同时保留完整的本地开发工作流程。借助这一支持,您仅需定义一次资源,即可在本地进行迭代,而无需等待云部署,这将加速无服务器开发。

开发人员经常需要根据单个模板定义来定义多个相似的资源,例如 Lambda 函数、DynamoDB 表或 SNS 主题。但是,以前使用 SAM CLI 构建、测试和部署无服务器应用程序的开发人员,无法处理使用 CloudFormation 语言扩展的模板。这使得开发人员不得不二选一:要么减少模板的重复内容,要么在本地开发中使用 SAM CLI。现在,SAM CLI 在内存中处理语言扩展以进行本地操作,同时保留原始模板以进行 CloudFormation 部署。您可以定义一次资源,然后在本地使用所有 SAM CLI 命令对这些资源进行测试,从而在部署前发现语法错误或依赖项缺失等问题。这可以缩短迭代周期,并减少在云中调试失败的部署所花费的时间。

要开始使用,请下载或更新 SAM CLI 至最新版本。将 AWS::LanguageExtensions 转换添加到您的 SAM 模板中,并使用 Fn::ForEach 根据单个定义生成多个资源。SAM CLI 命令(包括 sam build、sam local invoke、sam sync、sam local start-api 和 sam validate)会自动展开循环,并处理生成的每个资源。您可以按名称调用扩展函数,例如 sam local invoke AlphaFunction。SAM CLI 还支持 Fn::Length、Fn::ToJsonString、Fn::FindInMap with DefaultValue 以及条件 DeletionPolicy 和 UpdateReplacePolicy 属性。

要了解更多信息,请参阅 SAM CLI 开发人员指南发布博客文章