Support external lambda modules

[djgrant]

Currently, it is only possible to create lambdas using ES modules. This supports creating lambdas directly, referencing a module or zip path.

Changes

File buffer is stored in state again. Ideally this will be removed in the future, but for now this change decouples the lambda and zip resources (allowing a file resource to be a lambda dependency), and simplifies things.

The @notation/aws.iac lambda resource has a breaking change.

Example

import { lambda } from "@notation/aws/lambda";

export const externalJsLambda = lambda({
  id: "external-js",
  handler: "handler",
  code: {
    type: "file",
    path: "external/lambda.mjs",
  },
});

export const externalZipLambda = lambda({
  id: "external-zip",
  handler: "handler",
  code: {
    type: "zip",
    path: "external/lambda.zip",
  },
});

The lambdas can also be attached to other resource groups:

import { api, router } from "@notation/aws/api-gateway";
import { externalJsLambda, externalZipLambda } from "./lambda";

const helloApi = api({ name: "hello-api" });
const helloRouter = router(helloApi);

helloRouter.get("/hello1", externalJsLambda);
helloRouter.get("/hello2", externalZipLambda);