chore(custom-resource-handlers): refactor minify and bundling step (#26287)

Make `minify-and-bundle-sources.ts` more clear by putting the bundled files into its own `dist` folder, and copying that `dist` folder into `aws-cdk-lib`.

----

*By submitting this pull request, I confirm that my contribution is made under the terms of the Apache-2.0 license*

Author: kaizencc

packages/@aws-cdk/custom-resource-handlers/package.json

@@ -4,7 +4,7 @@
   "private": true,
   "version": "0.0.0",
   "scripts": {
-    "build": "tsc -b && node scripts/minify-sources.js",
+    "build": "tsc -b && node scripts/minify-and-bundle-sources.js",
     "integ": "integ-runner",
     "lint": "cdk-lint",
     "package": "cdk-package",

packages/@aws-cdk/custom-resource-handlers/scripts/minify-sources.ts renamed to packages/@aws-cdk/custom-resource-handlers/scripts/minify-and-bundle-sources.ts

@@ -10,7 +10,11 @@ function recFolderStructure(fileOrDir: string) {
       recFolderStructure(path.join(fileOrDir, i));
     }
   } else {
-    if (path.extname(fileOrDir) === '.ts' && !fileOrDir.includes('.d.ts') && !fileOrDir.includes('nodejs-entrypoint')) {
+    // Only minify + bundle 'index.ts' files.
+    // The reason why they are called 'index.ts' is that aws-cdk-lib expects that
+    // as the file name and it is more intuitive to keep the same name rather than
+    // rename as we copy it out.
+    if (fileOrDir.includes('index.ts')) {
       entryPoints.push(fileOrDir);
     }
   }
@@ -23,7 +27,7 @@ recFolderStructure(bindingsDir);
 for (const ep of entryPoints) {
   void esbuild.build({
     entryPoints: [ep],
-    outfile: `${ep.slice(0, ep.lastIndexOf('.'))}.js`,
+    outfile: calculateOutfile(ep),
     external: ['@aws-sdk/*'],
     format: 'cjs',
     platform: 'node',
@@ -36,3 +40,14 @@ for (const ep of entryPoints) {
     tsconfig: 'tsconfig.json',
   });
 }
+
+function calculateOutfile(file: string) {
+  // turn ts extension into js extension
+  file = path.join(path.dirname(file), path.basename(file, path.extname(file)) + '.js');
+
+  // replace /lib with /dist
+  const fileContents = file.split(path.sep);
+  fileContents[fileContents.lastIndexOf('lib')] = 'dist';
+
+  return fileContents.join(path.sep);
+}

packages/aws-cdk-lib/aws-ecr/lib/repository.ts

@@ -860,7 +860,7 @@ export class Repository extends RepositoryBase {
   private enableAutoDeleteImages() {
     const firstTime = Stack.of(this).node.tryFindChild(`${AUTO_DELETE_IMAGES_RESOURCE_TYPE}CustomResourceProvider`) === undefined;
     const provider = CustomResourceProvider.getOrCreateProvider(this, AUTO_DELETE_IMAGES_RESOURCE_TYPE, {
-      codeDirectory: path.join(__dirname, '..', '..', 'custom-resource-handlers', 'lib', 'aws-ecr', 'auto-delete-images-handler'),
+      codeDirectory: path.join(__dirname, '..', '..', 'custom-resource-handlers', 'dist', 'aws-ecr', 'auto-delete-images-handler'),
       useCfnResponseWrapper: false,
       runtime: CustomResourceProviderRuntime.NODEJS_18_X,
       description: `Lambda function for auto-deleting images in ${this.repositoryName} repository.`,

packages/aws-cdk-lib/aws-s3/lib/bucket.ts

@@ -2427,7 +2427,7 @@ export class Bucket extends BucketBase {
 
   private enableAutoDeleteObjects() {
     const provider = CustomResourceProvider.getOrCreateProvider(this, AUTO_DELETE_OBJECTS_RESOURCE_TYPE, {
-      codeDirectory: path.join(__dirname, '..', '..', 'custom-resource-handlers', 'lib', 'aws-s3', 'auto-delete-objects-handler'),
+      codeDirectory: path.join(__dirname, '..', '..', 'custom-resource-handlers', 'dist', 'aws-s3', 'auto-delete-objects-handler'),
       useCfnResponseWrapper: false,
       runtime: CustomResourceProviderRuntime.NODEJS_18_X,
       description: `Lambda function for auto-deleting objects in ${this.bucketName} S3 bucket.`,

packages/aws-cdk-lib/scripts/airlift-custom-resource-handlers.sh

@@ -5,7 +5,7 @@ customresourcedir=$(node -p "path.dirname(require.resolve('@aws-cdk/custom-resou
 awscdklibdir=${scriptdir}/..
 
 list_custom_resources() {
-  for file in $customresourcedir/lib/*/*/index.js; do
+  for file in $customresourcedir/dist/*/*/index.js; do
     echo $file | rev | cut -d "/" -f 2-4 | rev
   done
 }