feat: switch to ESM and esbuild (#380)

* feat: switch to ESM and esbuild ESM support is now available on AWS Lambda: https://aws.amazon.com/de/blogs/compute/using-node-js-es-modules-and-top-level-await-in-aws-lambda/ See NordicSemiconductor/asset-tracker-cloud-aws-js#572 Closes #365 BREAKING CHANGE: this requires lambdas to be authored for ESM
NordicSemiconductor · Jan 7, 2022 · 601727a · 601727a
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diff --git a/.prettierrc.js b/.prettierrc.js
diff --git a/README.md b/README.md
@@ -6,8 +6,9 @@
 [![Mergify Status](https://img.shields.io/endpoint.svg?url=https://gh.mergify.io/badges/NordicSemiconductor/cloud-aws-package-layered-lambdas-js)](https://mergify.io)
 [![Commitizen friendly](https://img.shields.io/badge/commitizen-friendly-brightgreen.svg)](http://commitizen.github.io/cz-cli/)
 
-Packages lambdas with intra-project dependencies using Webpack and a base layer
-with the dependencies defined in `package.json`.
+Packages lambdas with intra-project dependencies using
+[esbuild](https://github.com/evanw/esbuild) and a base layer with the
+dependencies defined in `package.json`.
 
 Checksums are created for dependencies per lambda so that rebuild only happens
 when files are changed.

diff --git a/cdk/LambdaSourceCodeStorageApp.ts b/cdk/LambdaSourceCodeStorageApp.ts
@@ -1,5 +1,5 @@
 import { App } from '@aws-cdk/core'
-import { LambdaSourceCodeStorageStack } from './LambdaSourceCodeStorageStack'
+import { LambdaSourceCodeStorageStack } from './LambdaSourceCodeStorageStack.js'
 
 /**
  * In order to deploy lambda functions written in TypeScript we need to publish

diff --git a/cdk/TestApp.ts b/cdk/TestApp.ts
@@ -1,6 +1,6 @@
 import { App } from '@aws-cdk/core'
-import { TestStack, TestStackLambdas } from './TestStack'
-import { LayeredLambdas } from '../src'
+import { LayeredLambdas } from '../src/index.js'
+import { TestStack, TestStackLambdas } from './TestStack.js'
 
 export class TestApp extends App {
 	public constructor(args: {

diff --git a/cdk/TestStack.ts b/cdk/TestStack.ts
@@ -1,9 +1,9 @@
-import * as CloudFormation from '@aws-cdk/core'
-import * as Lambda from '@aws-cdk/aws-lambda'
 import * as IAM from '@aws-cdk/aws-iam'
-import * as S3 from '@aws-cdk/aws-s3'
+import * as Lambda from '@aws-cdk/aws-lambda'
 import * as CloudWatchLogs from '@aws-cdk/aws-logs'
-import { LayeredLambdas } from '../src'
+import * as S3 from '@aws-cdk/aws-s3'
+import * as CloudFormation from '@aws-cdk/core'
+import { LayeredLambdas } from '../src/index.js'
 
 export type TestStackLambdas = {
 	uuid: string

diff --git a/cdk/cloudformation-sourcecode.ts b/cdk/cloudformation-sourcecode.ts
@@ -1,5 +1,5 @@
-import { LambdaSourceCodeStorageApp } from './LambdaSourceCodeStorageApp'
-import { LambdaSourceCodeStorageStack } from './LambdaSourceCodeStorageStack'
+import { LambdaSourceCodeStorageApp } from './LambdaSourceCodeStorageApp.js'
+import { LambdaSourceCodeStorageStack } from './LambdaSourceCodeStorageStack.js'
 
 const stackName = process.env.STACK_NAME
 

diff --git a/cdk/cloudformation.ts b/cdk/cloudformation.ts
@@ -1,5 +1,5 @@
-import { TestApp } from './TestApp'
-import { prepareResources } from './prepareResources'
+import { prepareResources } from './prepareResources.js'
+import { TestApp } from './TestApp.js'
 
 const stackName = process.env.STACK_NAME
 

diff --git a/cdk/getLambdaSourceCodeBucketName.ts b/cdk/getLambdaSourceCodeBucketName.ts
@@ -2,7 +2,7 @@ import {
 	CloudFormationClient,
 	DescribeStacksCommand,
 } from '@aws-sdk/client-cloudformation'
-import { LambdaSourceCodeStorageStack } from './LambdaSourceCodeStorageStack'
+import { LambdaSourceCodeStorageStack } from './LambdaSourceCodeStorageStack.js'
 
 const cf = new CloudFormationClient({})
 

diff --git a/cdk/prepareResources.ts b/cdk/prepareResources.ts
@@ -1,8 +1,12 @@
-import * as path from 'path'
 import { promises as fs } from 'fs'
-import { getLambdaSourceCodeBucketName } from './getLambdaSourceCodeBucketName'
-import { TestStackLambdas } from './TestStack'
-import { packBaseLayer, packLayeredLambdas, LayeredLambdas } from '../src'
+import * as path from 'path'
+import {
+	LayeredLambdas,
+	packBaseLayer,
+	packLayeredLambdas,
+} from '../src/index.js'
+import { getLambdaSourceCodeBucketName } from './getLambdaSourceCodeBucketName.js'
+import { TestStackLambdas } from './TestStack.js'
 
 export const prepareResources = async ({
 	stackName,
@@ -81,7 +85,6 @@ export const prepareResources = async ({
 		lambdas: {
 			uuid: path.resolve(rootDir, 'test', 'uuidLambda.ts'),
 		},
-		tsConfig: path.resolve(rootDir, 'tsconfig.json'),
 	})
 
 	return {

diff --git a/commitlint.config.js → commitlint.config.cjs b/commitlint.config.js → commitlint.config.cjs