feat(maintenance): drop support for Node.js 16.x (#2717)

Author: dreamorosi

.github/ISSUE_TEMPLATE/bug_report.yml

@@ -69,7 +69,6 @@ body:
       options:
         - 20.x
         - 18.x
-        - 16.x
     validations:
       required: true
   - type: dropdown

.github/actions/cached-node-modules/action.yml

@@ -14,10 +14,6 @@ outputs:
 runs:
   using: "composite"
   steps:
-    - name: Install npm
-      # We need to keep this npm version until we drop Node.js 16 support because Node.js 16 doesn't support npm 10
-      run: npm i -g npm@next-9
-      shell: bash
     - name: Cache node modules
       id: cache-node-modules
       uses: actions/cache@13aacd865c20de90d75de3b17ebe84f7a17d57d2 # v4.0.0

.github/workflows/reusable-run-linting-check-and-unit-tests.yml

@@ -13,7 +13,7 @@ jobs:
       NODE_ENV: dev
     strategy:
       matrix:
-        version: [16, 18, 20]
+        version: [18, 20]
       fail-fast: false
     steps:
       - name: Checkout code

.github/workflows/run-e2e-tests.yml

@@ -32,7 +32,7 @@ jobs:
             packages/parameters,
             packages/idempotency,
           ]
-        version: [16, 18, 20]
+        version: [18, 20]
         arch: [x86_64, arm64]
       fail-fast: false
     steps:

docs/index.md

@@ -250,7 +250,7 @@ You can use Powertools for AWS Lambda (TypeScript) by installing it with your fa
 
 [Lambda Layer](https://docs.aws.amazon.com/lambda/latest/dg/configuration-layers.html){target="_blank"} is a `.zip` file archive that can contain additional code, pre-packaged dependencies, data, or configuration files. We compile and optimize [all dependencies](#install) to achieve an optimal build.
 
-You can use the Lambda Layer both with CommonJS and ESM (ECMAScript modules) for Node.js 18.x and newer runtimes. **If you are using the managed Node.js 16.x runtime and cannot upgrade, you should use the CommonJS version only**.
+You can use the Lambda Layer both with CommonJS and ESM (ECMAScript modules) for Node.js 18.x and newer runtimes.
 
 ??? note "Click to expand and copy any regional Lambda Layer ARN"
     | Region           | Layer ARN                                                                                                     |

docs/overrides/main.html

@@ -8,6 +8,8 @@
 {% endblock %}
 
 {% block announce %}
-Starting from July 1, 2024 we will end support for Node.js 16. Learn more <a
-  href="https://github.com/aws-powertools/powertools-lambda-typescript/issues/2223" target="_blank">here</a>.
+On September 1st, 2024 v1 of Powertools for AWS Lambda (TypeScript) <a
+  href="https://github.com/aws-powertools/powertools-lambda-typescript/issues/2224" target="_blank">will reach
+  End-of-Life</a>. We recommend you to <a href="https://docs.powertools.aws.dev/lambda/typescript/latest/upgrade/"
+  target="_blank">upgrade to v2</a>.
 {% endblock %}

docs/upgrade.md

@@ -31,7 +31,7 @@ V2 is focused on official support for ESM (ECMAScript modules). We've made other
 
 Before you start, we suggest making a copy of your current working project or create a new git branch.
 
-1. Upgrade Node.js to v16 or higher, Node.js v20 is recommended.
+1. Upgrade Node.js to v18 or higher, Node.js v20 is recommended.
 2. Ensure that you have the latest Powertools for AWS Lambda (TypeScript) version via [Lambda Layer](./index.md#lambda-layer) or npm.
 3. Review the following sections to confirm whether they apply to your codebase.
 

layers/src/canary-stack.ts

@@ -41,7 +41,7 @@ export class CanaryStack extends Stack {
         '../tests/e2e/layerPublisher.class.test.functionCode.ts'
       ),
       handler: 'handler',
-      runtime: Runtime.NODEJS_16_X,
+      runtime: Runtime.NODEJS_18_X,
       functionName: `canary-${suffix}`,
       timeout: Duration.seconds(30),
       bundling: {

layers/src/layer-publisher-stack.ts

@@ -36,11 +36,7 @@ export class LayerPublisherStack extends Stack {
     this.lambdaLayerVersion = new LayerVersion(this, 'LambdaPowertoolsLayer', {
       layerVersionName: props?.layerName,
       description: `Powertools for AWS Lambda (TypeScript) version ${powertoolsPackageVersion}`,
-      compatibleRuntimes: [
-        Runtime.NODEJS_16_X,
-        Runtime.NODEJS_18_X,
-        Runtime.NODEJS_20_X,
-      ],
+      compatibleRuntimes: [Runtime.NODEJS_18_X, Runtime.NODEJS_20_X],
       license: 'MIT-0',
       // This is needed because the following regions do not support the compatibleArchitectures property #1400
       // ...(![ 'eu-south-2', 'eu-central-2', 'ap-southeast-4' ].includes(Stack.of(this).region) ? { compatibleArchitectures: [Architecture.X86_64] } : {}),
@@ -105,7 +101,7 @@ export class LayerPublisherStack extends Stack {
                 'node_modules/@aws-sdk/**/README.md ',
               ];
               const buildCommands: string[] = [];
-              // We need these modules because they are not included in the nodejs16x runtimes
+              // We install these to get the latest version of the packages
               const modulesToInstall: string[] = [
                 '@aws-sdk/client-dynamodb',
                 '@aws-sdk/util-dynamodb',

layers/tests/e2e/layerPublisher.test.ts

@@ -11,7 +11,6 @@ import {
   TestInvocationLogs,
   invokeFunctionOnce,
   generateTestUniqueName,
-  getRuntimeKey,
 } from '@aws-lambda-powertools/testing-utils';
 import { TestNodejsFunction } from '@aws-lambda-powertools/testing-utils/resources/lambda';
 import {
@@ -48,13 +47,7 @@ describe(`Layers E2E tests`, () => {
     },
   });
 
-  /**
-   * Node.js 16.x does not support importing ESM modules from Lambda Layers reliably.
-   *
-   * The feature is available in Node.js 18.x and later.
-   * @see https://aws.amazon.com/blogs/compute/node-js-18-x-runtime-now-available-in-aws-lambda/
-   */
-  const cases = getRuntimeKey() === 'nodejs16x' ? ['CJS'] : ['CJS', 'ESM'];
+  const cases = ['CJS', 'ESM'];
   const invocationLogsMap: Map<(typeof cases)[number], TestInvocationLogs> =
     new Map();