chore(maintenance): migrate layers package to biome

layers/bin/layers.ts

@@ -1,8 +1,8 @@
 #!/usr/bin/env node
 import 'source-map-support/register';
 import { App } from 'aws-cdk-lib';
-import { LayerPublisherStack } from '../src/layer-publisher-stack';
 import { CanaryStack } from 'layers/src/canary-stack';
+import { LayerPublisherStack } from '../src/layer-publisher-stack';
 
 const SSM_PARAM_LAYER_ARN = '/layers/powertools-layer-arn';
 

layers/cdk.json

@@ -1,9 +1,7 @@
 {
   "app": "npx ts-node --prefer-ts-exts bin/layers.ts",
   "watch": {
-    "include": [
-      "**"
-    ],
+    "include": ["**"],
     "exclude": [
       "README.md",
       "cdk*.json",
@@ -24,9 +22,6 @@
     "@aws-cdk/aws-cloudfront:defaultSecurityPolicyTLSv1.2_2021": true,
     "@aws-cdk-containers/ecs-service-extensions:enableDefaultLogDriver": true,
     "@aws-cdk/aws-ec2:uniqueImdsv2TemplateName": true,
-    "@aws-cdk/core:target-partitions": [
-      "aws",
-      "aws-cn"
-    ]
+    "@aws-cdk/core:target-partitions": ["aws", "aws-cn"]
   }
 }

layers/package.json

@@ -12,8 +12,8 @@
     "jest": "jest --detectOpenHandles",
     "cdk": "cdk",
     "package": "echo 'Not applicable'",
-    "lint": "eslint --ext .ts,.js --no-error-on-unmatched-pattern .",
-    "lint-fix": "eslint --fix --ext .ts,.js --fix --no-error-on-unmatched-pattern .",
+    "lint": "biome lint .",
+    "lint:fix": "biome check --write .",
     "test:unit": "jest --group=unit",
     "test:e2e": "jest --group=e2e",
     "createLayerFolder": "cdk synth --context BuildFromLocal=true"

layers/src/canary-stack.ts

@@ -1,13 +1,13 @@
-import { CustomResource, Duration, Stack, StackProps } from 'aws-cdk-lib';
-import { Construct } from 'constructs';
-import { LayerVersion, Runtime, Tracing } from 'aws-cdk-lib/aws-lambda';
-import { RetentionDays } from 'aws-cdk-lib/aws-logs';
 import { randomUUID } from 'node:crypto';
-import { Effect, PolicyStatement } from 'aws-cdk-lib/aws-iam';
-import { Provider } from 'aws-cdk-lib/custom-resources';
-import { StringParameter } from 'aws-cdk-lib/aws-ssm';
 import path from 'node:path';
+import { CustomResource, Duration, Stack, type StackProps } from 'aws-cdk-lib';
+import { Effect, PolicyStatement } from 'aws-cdk-lib/aws-iam';
+import { LayerVersion, Runtime, Tracing } from 'aws-cdk-lib/aws-lambda';
 import { NodejsFunction } from 'aws-cdk-lib/aws-lambda-nodejs';
+import { RetentionDays } from 'aws-cdk-lib/aws-logs';
+import { StringParameter } from 'aws-cdk-lib/aws-ssm';
+import { Provider } from 'aws-cdk-lib/custom-resources';
+import type { Construct } from 'constructs';
 
 export interface CanaryStackProps extends StackProps {
   readonly layerName: string;

layers/src/layer-publisher-stack.ts

@@ -1,15 +1,15 @@
-import { CfnOutput, RemovalPolicy, Stack, StackProps } from 'aws-cdk-lib';
+import { execSync } from 'node:child_process';
+import { randomUUID } from 'node:crypto';
+import { join, resolve, sep } from 'node:path';
+import { CfnOutput, RemovalPolicy, Stack, type StackProps } from 'aws-cdk-lib';
 import {
   CfnLayerVersionPermission,
   Code,
   LayerVersion,
   Runtime,
 } from 'aws-cdk-lib/aws-lambda';
 import { StringParameter } from 'aws-cdk-lib/aws-ssm';
-import { Construct } from 'constructs';
-import { execSync } from 'node:child_process';
-import { randomUUID } from 'node:crypto';
-import { join, resolve, sep } from 'node:path';
+import type { Construct } from 'constructs';
 
 export interface LayerPublisherStackProps extends StackProps {
   readonly layerName?: string;
@@ -217,7 +217,7 @@ export class LayerPublisherStack extends Stack {
 
     new CfnOutput(this, 'LatestLayerArn', {
       value: this.lambdaLayerVersion.layerVersionArn,
-      exportName: props?.layerName ?? `LambdaPowerToolsForTypeScriptLayerARN`,
+      exportName: props?.layerName ?? 'LambdaPowerToolsForTypeScriptLayerARN',
     });
   }
 }

layers/tests/e2e/layerPublisher.class.test.functionCode.ts

@@ -1,18 +1,18 @@
-import { join } from 'node:path';
 import { readFile } from 'node:fs/promises';
+import { join } from 'node:path';
+import { BatchProcessor, EventType } from '@aws-lambda-powertools/batch';
+import { DynamoDBPersistenceLayer } from '@aws-lambda-powertools/idempotency/dynamodb';
 import { Logger } from '@aws-lambda-powertools/logger';
 import { Metrics } from '@aws-lambda-powertools/metrics';
-import { Tracer } from '@aws-lambda-powertools/tracer';
-import { DynamoDBPersistenceLayer } from '@aws-lambda-powertools/idempotency/dynamodb';
-import { DynamoDBClient } from '@aws-sdk/client-dynamodb';
-import { BatchProcessor, EventType } from '@aws-lambda-powertools/batch';
-import { SSMProvider } from '@aws-lambda-powertools/parameters/ssm';
-import { SecretsProvider } from '@aws-lambda-powertools/parameters/secrets';
 import { AppConfigProvider } from '@aws-lambda-powertools/parameters/appconfig';
 import { DynamoDBProvider } from '@aws-lambda-powertools/parameters/dynamodb';
-import { SSMClient } from '@aws-sdk/client-ssm';
-import { SecretsManagerClient } from '@aws-sdk/client-secrets-manager';
+import { SecretsProvider } from '@aws-lambda-powertools/parameters/secrets';
+import { SSMProvider } from '@aws-lambda-powertools/parameters/ssm';
+import { Tracer } from '@aws-lambda-powertools/tracer';
 import { AppConfigDataClient } from '@aws-sdk/client-appconfigdata';
+import { DynamoDBClient } from '@aws-sdk/client-dynamodb';
+import { SecretsManagerClient } from '@aws-sdk/client-secrets-manager';
+import { SSMClient } from '@aws-sdk/client-ssm';
 
 const logger = new Logger({
   logLevel: 'DEBUG',
@@ -91,7 +91,7 @@ export const handler = async (): Promise<void> => {
     'batch',
   ]) {
     const moduleVersion = await getVersionFromModule(moduleName);
-    if (moduleVersion != expectedVersion) {
+    if (moduleVersion !== expectedVersion) {
       throw new Error(
         `Package version mismatch (${moduleName}): ${moduleVersion} != ${expectedVersion}`
       );

layers/tests/e2e/layerPublisher.test.ts

@@ -3,23 +3,23 @@
  *
  * @group e2e/layers/all
  */
-import { App } from 'aws-cdk-lib';
-import { LayerVersion } from 'aws-cdk-lib/aws-lambda';
-import { LayerPublisherStack } from '../../src/layer-publisher-stack';
+import { join } from 'node:path';
 import {
-  TestStack,
   TestInvocationLogs,
-  invokeFunctionOnce,
+  TestStack,
   generateTestUniqueName,
+  invokeFunctionOnce,
 } from '@aws-lambda-powertools/testing-utils';
 import { TestNodejsFunction } from '@aws-lambda-powertools/testing-utils/resources/lambda';
+import { App } from 'aws-cdk-lib';
+import { LayerVersion } from 'aws-cdk-lib/aws-lambda';
+import packageJson from '../../package.json';
+import { LayerPublisherStack } from '../../src/layer-publisher-stack';
 import {
   RESOURCE_NAME_PREFIX,
   SETUP_TIMEOUT,
   TEARDOWN_TIMEOUT,
 } from './constants';
-import { join } from 'node:path';
-import packageJson from '../../package.json';
 
 jest.spyOn(console, 'log').mockImplementation();
 
@@ -39,7 +39,7 @@ function assertLogs(
  *
  * The lambda function is invoked once and the logs are collected. The goal of the test is to verify that the layer creation and usage works as expected.
  */
-describe(`Layers E2E tests`, () => {
+describe('Layers E2E tests', () => {
   const testStack = new TestStack({
     stackNameProps: {
       stackNamePrefix: RESOURCE_NAME_PREFIX,
@@ -96,7 +96,7 @@ describe(`Layers E2E tests`, () => {
     );
 
     // Add a lambda function for each output format to the test stack
-    cases.forEach((outputFormat) => {
+    for (const outputFormat of cases) {
       new TestNodejsFunction(
         testStack,
         {
@@ -120,7 +120,7 @@ describe(`Layers E2E tests`, () => {
           ...(outputFormat === 'ESM' && { outputFormat: 'ESM' }),
         }
       );
-    });
+    }
 
     // Deploy the test stack
     await testStack.deploy();
@@ -141,28 +141,31 @@ describe(`Layers E2E tests`, () => {
   describe.each(cases)(
     'utilities tests for %s output format',
     (outputFormat) => {
-      let invocationLogs: TestInvocationLogs;
-      beforeAll(() => {
+      it('should have no errors in the logs, which indicates the pacakges version matches the expected one', () => {
         const maybeInvocationLogs = invocationLogsMap.get(outputFormat);
         assertLogs(maybeInvocationLogs);
-        invocationLogs = maybeInvocationLogs;
-      });
-
-      it('should have no errors in the logs, which indicates the pacakges version matches the expected one', () => {
+        const invocationLogs = maybeInvocationLogs;
         const logs = invocationLogs.getFunctionLogs('ERROR');
 
         expect(logs.length).toBe(0);
       });
 
       it('should have one warning related to missing Metrics namespace', () => {
+        const maybeInvocationLogs = invocationLogsMap.get(outputFormat);
+        assertLogs(maybeInvocationLogs);
+        const invocationLogs = maybeInvocationLogs;
         const logs = invocationLogs.getFunctionLogs('WARN');
 
         expect(logs.length).toBe(1);
         expect(logs[0]).toContain('Namespace should be defined, default used');
       });
 
       it('should have one info log related to coldstart metric', () => {
+        const maybeInvocationLogs = invocationLogsMap.get(outputFormat);
+        assertLogs(maybeInvocationLogs);
+        const invocationLogs = maybeInvocationLogs;
         const logs = invocationLogs.getFunctionLogs();
+
         const emfLogEntry = logs.find((log) =>
           log.match(
             /{"_aws":{"Timestamp":\d+,"CloudWatchMetrics":\[\{"Namespace":"\S+","Dimensions":\[\["service"\]\],"Metrics":\[\{"Name":"ColdStart","Unit":"Count"\}\]\}\]},"service":"\S+","ColdStart":1}/
@@ -173,6 +176,9 @@ describe(`Layers E2E tests`, () => {
       });
 
       it('should have one debug log with tracer subsegment info', () => {
+        const maybeInvocationLogs = invocationLogsMap.get(outputFormat);
+        assertLogs(maybeInvocationLogs);
+        const invocationLogs = maybeInvocationLogs;
         const logs = invocationLogs.getFunctionLogs('DEBUG');
 
         expect(logs.length).toBe(1);

layers/tests/tsconfig.json

@@ -1,12 +1,8 @@
 {
-    "extends": "../tsconfig.json",
-    "compilerOptions": {
-        "rootDir": "../",
-        "noEmit": true
-    },
-    "include": [
-        "../src/**/*",
-        "../package.json",
-        "./**/*",
-    ]
-}
+  "extends": "../tsconfig.json",
+  "compilerOptions": {
+    "rootDir": "../",
+    "noEmit": true
+  },
+  "include": ["../src/**/*", "../package.json", "./**/*"]
+}

layers/tsconfig.json

@@ -1,12 +1,9 @@
 {
-    "extends": "../tsconfig.json",
-    "compilerOptions": {
-        "outDir": "./lib",
-        "rootDir": "./",
-        "resolveJsonModule": true
-    },
-    "include": [
-        "./src/**/*",
-        "./bin/**/*"
-    ],
-}
+  "extends": "../tsconfig.json",
+  "compilerOptions": {
+    "outDir": "./lib",
+    "rootDir": "./",
+    "resolveJsonModule": true
+  },
+  "include": ["./src/**/*", "./bin/**/*"]
+}