feat(commons): add esmodule support

examples/cdk/functions/common/powertools.ts

@@ -1,7 +1,7 @@
 import { Logger } from '@aws-lambda-powertools/logger';
 import { Metrics } from '@aws-lambda-powertools/metrics';
 import { Tracer } from '@aws-lambda-powertools/tracer';
-import { PT_VERSION } from '@aws-lambda-powertools/commons/lib/version';
+import { PT_VERSION } from '@aws-lambda-powertools/commons';
 
 const defaultValues = {
   region: process.env.AWS_REGION || 'N/A',

examples/cdk/functions/get-all-items.ts

@@ -1,4 +1,4 @@
-import { injectLambdaContext } from '@aws-lambda-powertools/logger';
+import { injectLambdaContext } from '@aws-lambda-powertools/logger/middleware';
 import { logMetrics } from '@aws-lambda-powertools/metrics';
 import { captureLambdaHandler } from '@aws-lambda-powertools/tracer';
 import { ScanCommand } from '@aws-sdk/lib-dynamodb';

examples/cdk/functions/get-by-id.ts

@@ -1,4 +1,4 @@
-import { LambdaInterface } from '@aws-lambda-powertools/commons';
+import type { LambdaInterface } from '@aws-lambda-powertools/commons/types';
 import { GetCommand } from '@aws-sdk/lib-dynamodb';
 import {
   APIGatewayProxyEvent,

examples/cdk/functions/uuid.ts

@@ -1,6 +1,6 @@
 import { randomUUID } from 'node:crypto';
 
-exports.handler = async (_event) => {
+exports.handler = async () => {
   return {
     statusCode: 200,
     body: JSON.stringify(randomUUID()),

examples/sam/src/common/powertools.ts

@@ -1,7 +1,7 @@
 import { Logger } from '@aws-lambda-powertools/logger';
 import { Metrics } from '@aws-lambda-powertools/metrics';
 import { Tracer } from '@aws-lambda-powertools/tracer';
-import { PT_VERSION } from '@aws-lambda-powertools/commons/lib/version';
+import { PT_VERSION } from '@aws-lambda-powertools/commons';
 
 const defaultValues = {
   region: process.env.AWS_REGION || 'N/A',

examples/sam/src/get-all-items.ts

@@ -7,7 +7,7 @@ import middy from '@middy/core';
 import { tableName } from './common/constants';
 import { logger, tracer, metrics } from './common/powertools';
 import { logMetrics } from '@aws-lambda-powertools/metrics';
-import { injectLambdaContext } from '@aws-lambda-powertools/logger';
+import { injectLambdaContext } from '@aws-lambda-powertools/logger/middleware';
 import { captureLambdaHandler } from '@aws-lambda-powertools/tracer';
 import { docClient } from './common/dynamodb-client';
 import { ScanCommand } from '@aws-sdk/lib-dynamodb';

examples/sam/src/get-by-id.ts

@@ -1,4 +1,4 @@
-import { LambdaInterface } from '@aws-lambda-powertools/commons';
+import type { LambdaInterface } from '@aws-lambda-powertools/commons/types';
 import { GetCommand } from '@aws-sdk/lib-dynamodb';
 import {
   APIGatewayProxyEvent,

examples/sam/src/get-uuid.ts

@@ -1,6 +1,6 @@
 import { randomUUID } from 'node:crypto';
 
-exports.handler = async (_event) => {
+exports.handler = async () => {
   return {
     statusCode: 200,
     body: JSON.stringify(randomUUID()),

packages/batch/tests/unit/BatchProcessor.test.ts

@@ -4,7 +4,7 @@
  * @group unit/batch/class/asyncBatchProcessor
  */
 import type { Context } from 'aws-lambda';
-import { helloworldContext as dummyContext } from '@aws-lambda-powertools/commons/lib/samples/resources/contexts';
+import { ContextExamples as dummyContext } from '@aws-lambda-powertools/commons';
 import { BatchProcessor } from '../../src/BatchProcessor';
 import { EventType } from '../../src/constants';
 import { BatchProcessingError, FullBatchFailureError } from '../../src/errors';
@@ -23,7 +23,9 @@ import {
 
 describe('Class: AsyncBatchProcessor', () => {
   const ENVIRONMENT_VARIABLES = process.env;
-  const options: BatchProcessingOptions = { context: dummyContext };
+  const options: BatchProcessingOptions = {
+    context: dummyContext.helloworldContext,
+  };
 
   beforeEach(() => {
     jest.clearAllMocks();

packages/batch/tests/unit/BatchProcessorSync.test.ts

@@ -4,7 +4,7 @@
  * @group unit/batch/class/batchprocessor
  */
 import type { Context } from 'aws-lambda';
-import { helloworldContext as dummyContext } from '@aws-lambda-powertools/commons/lib/samples/resources/contexts';
+import { ContextExamples as dummyContext } from '@aws-lambda-powertools/commons';
 import { BatchProcessorSync } from '../../src/BatchProcessorSync';
 import { EventType } from '../../src/constants';
 import { BatchProcessingError, FullBatchFailureError } from '../../src/errors';
@@ -23,7 +23,9 @@ import {
 
 describe('Class: BatchProcessor', () => {
   const ENVIRONMENT_VARIABLES = process.env;
-  const options: BatchProcessingOptions = { context: dummyContext };
+  const options: BatchProcessingOptions = {
+    context: dummyContext.helloworldContext,
+  };
 
   beforeEach(() => {
     jest.clearAllMocks();

packages/batch/tests/unit/processPartialResponse.test.ts

@@ -9,8 +9,10 @@ import type {
   KinesisStreamEvent,
   SQSEvent,
 } from 'aws-lambda';
-import { helloworldContext as dummyContext } from '@aws-lambda-powertools/commons/lib/samples/resources/contexts';
-import { Custom as dummyEvent } from '@aws-lambda-powertools/commons/lib/samples/resources/events';
+import {
+  ContextExamples as dummyContext,
+  Events as dummyEvent,
+} from '@aws-lambda-powertools/commons';
 import { BatchProcessor } from '../../src/BatchProcessor';
 import { processPartialResponse } from '../../src/processPartialResponse';
 import { EventType } from '../../src/constants';
@@ -33,7 +35,9 @@ import {
 describe('Function: processPartialResponse()', () => {
   const ENVIRONMENT_VARIABLES = process.env;
   const context = dummyContext;
-  const options: BatchProcessingOptions = { context: dummyContext };
+  const options: BatchProcessingOptions = {
+    context: dummyContext.helloworldContext,
+  };
 
   beforeEach(() => {
     jest.clearAllMocks();
@@ -106,7 +110,7 @@ describe('Function: processPartialResponse()', () => {
       };
 
       // Act
-      const result = await handler(event, context);
+      const result = await handler(event, context.helloworldContext);
 
       // Assess
       expect(result).toStrictEqual({ batchItemFailures: [] });
@@ -133,7 +137,7 @@ describe('Function: processPartialResponse()', () => {
       };
 
       // Act
-      const result = await handler(event, context);
+      const result = await handler(event, context.helloworldContext);
 
       // Assess
       expect(result).toStrictEqual({ batchItemFailures: [] });
@@ -160,7 +164,7 @@ describe('Function: processPartialResponse()', () => {
       };
 
       // Act
-      const result = await handler(event, context);
+      const result = await handler(event, context.helloworldContext);
 
       // Assess
       expect(result).toStrictEqual({ batchItemFailures: [] });
@@ -169,7 +173,7 @@ describe('Function: processPartialResponse()', () => {
     test('Process partial response through handler for SQS records with incorrect event type', async () => {
       // Prepare
       const processor = new BatchProcessor(EventType.SQS);
-      const event = dummyEvent;
+      const event = dummyEvent.Custom;
 
       const handler = async (
         event: SQSEvent,
@@ -184,7 +188,7 @@ describe('Function: processPartialResponse()', () => {
 
       // Act & Assess
       await expect(() =>
-        handler(event as unknown as SQSEvent, context)
+        handler(event as unknown as SQSEvent, context.helloworldContext)
       ).rejects.toThrowError(
         `Unexpected batch type. Possible values are: ${Object.keys(
           EventType
@@ -216,7 +220,7 @@ describe('Function: processPartialResponse()', () => {
       };
 
       // Act
-      const result = await handler(event, context);
+      const result = await handler(event, context.helloworldContext);
 
       // Assess
       expect(result).toStrictEqual({ batchItemFailures: [] });

packages/batch/tests/unit/processPartialResponseSync.test.ts

@@ -9,8 +9,10 @@ import type {
   KinesisStreamEvent,
   SQSEvent,
 } from 'aws-lambda';
-import { helloworldContext as dummyContext } from '@aws-lambda-powertools/commons/lib/samples/resources/contexts';
-import { Custom as dummyEvent } from '@aws-lambda-powertools/commons/lib/samples/resources/events';
+import {
+  ContextExamples as dummyContext,
+  Events as dummyEvent,
+} from '@aws-lambda-powertools/commons';
 import { BatchProcessorSync } from '../../src/BatchProcessorSync';
 import { processPartialResponseSync } from '../../src/processPartialResponseSync';
 import { EventType } from '../../src/constants';
@@ -33,7 +35,9 @@ import {
 describe('Function: processPartialResponse()', () => {
   const ENVIRONMENT_VARIABLES = process.env;
   const context = dummyContext;
-  const options: BatchProcessingOptions = { context: dummyContext };
+  const options: BatchProcessingOptions = {
+    context: dummyContext.helloworldContext,
+  };
 
   beforeEach(() => {
     jest.clearAllMocks();
@@ -106,7 +110,7 @@ describe('Function: processPartialResponse()', () => {
       };
 
       // Act
-      const result = handler(event, context);
+      const result = handler(event, context.helloworldContext);
 
       // Assess
       expect(result).toStrictEqual({ batchItemFailures: [] });
@@ -133,7 +137,7 @@ describe('Function: processPartialResponse()', () => {
       };
 
       // Act
-      const result = handler(event, context);
+      const result = handler(event, context.helloworldContext);
 
       // Assess
       expect(result).toStrictEqual({ batchItemFailures: [] });
@@ -160,7 +164,7 @@ describe('Function: processPartialResponse()', () => {
       };
 
       // Act
-      const result = handler(event, context);
+      const result = handler(event, context.helloworldContext);
 
       // Assess
       expect(result).toStrictEqual({ batchItemFailures: [] });
@@ -169,7 +173,7 @@ describe('Function: processPartialResponse()', () => {
     test('Process partial response through handler for SQS records with incorrect event type', () => {
       // Prepare
       const processor = new BatchProcessorSync(EventType.SQS);
-      const event = dummyEvent;
+      const event = dummyEvent.Custom;
 
       const handler = (
         event: SQSEvent,
@@ -179,7 +183,9 @@ describe('Function: processPartialResponse()', () => {
       };
 
       // Act & Assess
-      expect(() => handler(event as unknown as SQSEvent, context)).toThrowError(
+      expect(() =>
+        handler(event as unknown as SQSEvent, context.helloworldContext)
+      ).toThrowError(
         `Unexpected batch type. Possible values are: ${Object.keys(
           EventType
         ).join(', ')}`
@@ -210,7 +216,7 @@ describe('Function: processPartialResponse()', () => {
       };
 
       // Act
-      const result = handler(event, context);
+      const result = handler(event, context.helloworldContext);
 
       // Assess
       expect(result).toStrictEqual({ batchItemFailures: [] });

packages/commons/jest.config.js → packages/commons/jest.config.cjs

@@ -4,6 +4,9 @@ module.exports = {
     color: 'red',
   },
   preset: 'ts-jest',
+  moduleNameMapper: {
+    '^(\\.{1,2}/.*)\\.js$': '$1',
+  },
   transform: {
     '^.+\\.ts?$': 'ts-jest',
   },
@@ -13,7 +16,7 @@ module.exports = {
   roots: ['<rootDir>/src', '<rootDir>/tests'],
   testPathIgnorePatterns: ['/node_modules/'],
   testEnvironment: 'node',
-  coveragePathIgnorePatterns: ['/node_modules/'],
+  coveragePathIgnorePatterns: ['/node_modules/', 'src/types/index.ts'],
   coverageThreshold: {
     global: {
       statements: 100,

packages/commons/package.json

@@ -15,19 +15,45 @@
     "test:e2e": "echo 'Not Applicable'",
     "watch": "jest --watch",
     "generateVersionFile": "echo \"// this file is auto generated, do not modify\nexport const PT_VERSION = '$(jq -r '.version' package.json)';\" > src/version.ts",
-    "build": "tsc --build --force",
+    "build:cjs": "tsc --build --force && echo '{ \"type\": \"commonjs\" }' > lib/cjs/package.json",
+    "build:esm": "tsc --project tsconfig.esm.json && echo '{ \"type\": \"module\" }' > lib/esm/package.json",
+    "build": "npm run build:esm & npm run build:cjs",
     "lint": "eslint --ext .ts,.js --no-error-on-unmatched-pattern .",
     "lint-fix": "eslint --fix --ext .ts,.js --no-error-on-unmatched-pattern .",
-    "prebuild": "rimraf ./lib",
-    "prepack": "node ../../.github/scripts/release_patch_package_json.js ."
+    "prepack": "rimraf ./lib/*.tsbuildinfo && node ../../.github/scripts/release_patch_package_json.js ."
   },
   "lint-staged": {
     "*.{js,ts}": "npm run lint-fix"
   },
   "homepage": "https://github.com/aws-powertools/powertools-lambda-typescript/tree/main/packages/metrics#readme",
   "license": "MIT-0",
-  "main": "./lib/index.js",
-  "types": "./lib/index.d.ts",
+  "type": "module",
+  "exports": {
+    ".": {
+      "require": {
+        "types": "./lib/cjs/index.d.ts",
+        "default": "./lib/cjs/index.js"
+      },
+      "import": {
+        "types": "./lib/esm/index.d.ts",
+        "default": "./lib/esm/index.js"
+      }
+    },
+    "./types": {
+      "import": "./lib/esm/types/index.js",
+      "require": "./lib/cjs/types/index.js"
+    }
+  },
+  "typesVersions": {
+    "*": {
+      "types": [
+        "lib/cjs/types/index.d.ts",
+        "lib/esm/types/index.d.ts"
+      ]
+    }
+  },
+  "types": "./lib/cjs/index.d.ts",
+  "main": "./lib/cjs/index.js",
   "files": [
     "lib"
   ],