我可以从Lambda图层导入打字稿类型吗? [英] Can I import typescript types from a Lambda Layer?

问题描述

我在构建Lambda函数时尝试使用TypeScript，但是在使用也是用TypeScript编写的Lambda Layer时遇到问题.

I am attempting to use TypeScript when building Lambda functions but hitting an issue when using a Lambda Layer which is also written in TypeScript.

TypeScript无法识别我的Layer的/opt/nodejs/...导入(因为它将在SAM或AWS中运行)，因此我无法将在Layer中定义的类型导入到Lambda函数中.

TypeScript does not recognise the /opt/nodejs/... import for my Layer (as it would running in SAM or AWS) and therefore I am unable to import types which I have defined in the Layer to my Lambda function.

我试图查看我是否能够以某种方式npm链接图层，但似乎无法正常工作，因为导入是本地路径"/opt/nodejs ..."，而不仅仅是一个模块名称.

I have tried looking to see if I am able to somehow npm link the layer but I can't seem to get that working because the import is a local path '/opt/nodejs...' and not a just a module name.

层:

export interface SomeType {
  someField: string
}

Lambda:

import { SomeType } from '/opt/nodejs/myLayer' // this does not work

我只是得到错误:Cannot find module '/opt/nodejs/myLayer'.ts(2307)，我发现自己必须用// @ts-ignore can be ignored as this is a Lambda layer抑制此错误，但这意味着我无法使用该图层中的TypeScript类型.

I am just getting the error: Cannot find module '/opt/nodejs/myLayer'.ts(2307) and I find myself having to suppress this with // @ts-ignore can be ignored as this is a Lambda layer but that means I am unable to use the TypeScript types from the layer.

推荐答案

我想我可能已经解决了这个问题，我在tsconfig.json中添加了/opt/nodejs ...路径作为路径映射:

I think I may have solved this one, I added the /opt/nodejs... path as a path mapping in tsconfig.json:

{
    "paths": {
      "/opt/nodejs/myLayer": ["../../layers/myLayer/src/some-layer-module"]
    }
}

我现在可以从图层中导入TypeScript类型，并且由于导入路径没有更改，它仍然可以在AWS/SAM中使用

I can now import TypeScript types from the Layer and as the import path isn't changed, it will still work in AWS/SAM

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