feat(aws-cdk-lib): reduce load time of JavaScript library (#27217)

This change halves the load time of `require('aws-cdk-lib')`, from ~600ms to ~300ms on my machine. It also shaves ~8min off running all integ tests (again, on my machine).

It does this by making all loading of JavaScript modules lazy, so they are only loaded just before any symbols from them are actually accessed (instead of loading all modules at startup). This new automatic module replaces the previous manual effort to do something similar, in `lazy-index.ts`.

Note that this transformation (unfortunately) does not affect TypeScript compilation times: the TypeScript compiler is still going to read all `.d.ts` files. To improve interactive TypeScript performance, use `swc` or `ts-node` with type checking disabled. Fully type checking your application using `tsc` will take the amount of time it takes.

## What's the big idea?

Turning this:

```js
const x = require("x");
module.exports.banana = function() {
  return x.hello();
}
```

Into this:

```js
var x = () => { var tmp = require("x"); x = () => tmp; return tmp; };
module.exports.banana = function () {
    return x().hello();
};
```

----

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

Author: rix0rrr

lerna.json

@@ -20,6 +20,7 @@
     "tools/@aws-cdk/prlint",
     "tools/@aws-cdk/spec2cdk",
     "tools/@aws-cdk/yarn-cling",
+    "tools/@aws-cdk/lazify",
     "scripts/@aws-cdk/script-tests"
   ],
   "rejectCycles": true,

package.json

@@ -88,6 +88,7 @@
       "tools/@aws-cdk/prlint",
       "tools/@aws-cdk/spec2cdk",
       "tools/@aws-cdk/yarn-cling",
+      "tools/@aws-cdk/lazify",
       "scripts/@aws-cdk/script-tests"
     ],
     "nohoist": [

packages/@aws-cdk-testing/cli-integ/tests/init-javascript/init-javascript.integtest.ts

@@ -1,3 +1,5 @@
+import * as path from 'path';
+import * as fs from 'fs-extra';
 import { integTest, withTemporaryDirectory, ShellHelper, withPackages } from '../../lib';
 
 ['app', 'sample-app'].forEach(template => {
@@ -13,3 +15,43 @@ import { integTest, withTemporaryDirectory, ShellHelper, withPackages } from '..
     await shell.shell(['cdk', 'synth']);
   })));
 });
+
+integTest('Test importing CDK from ESM', withTemporaryDirectory(withPackages(async (context) => {
+  // Use 'cdk init -l=javascript' to get set up, but use a different file
+  const shell = ShellHelper.fromContext(context);
+  await context.packages.makeCliAvailable();
+
+  await shell.shell(['cdk', 'init', '-l', 'javascript', 'app']);
+
+  // Rewrite some files
+  await fs.writeFile(path.join(context.integTestDir, 'new-entrypoint.mjs'), `
+// Test two styles of imports
+import { Stack, aws_sns as sns, aws_sns_subscriptions as subs, aws_sqs as sqs } from 'aws-cdk-lib';
+import * as cdk from 'aws-cdk-lib';
+
+class TestjsStack extends Stack {
+  constructor(scope, id, props) {
+    super(scope, id, props);
+
+    const queue = new sqs.Queue(this, 'TestjsQueue', {
+      visibilityTimeout: cdk.Duration.seconds(300)
+    });
+
+    const topic = new sns.Topic(this, 'TestjsTopic');
+
+    topic.addSubscription(new subs.SqsSubscription(queue));
+  }
+}
+
+const app = new cdk.App();
+new TestjsStack(app, 'TestjsStack');
+`, { encoding: 'utf-8' });
+
+  // Rewrite 'cdk.json' to use new entrypoint
+  const cdkJson = await fs.readJson(path.join(context.integTestDir, 'cdk.json'));
+  cdkJson.app = 'node new-entrypoing.mjs';
+  await fs.writeJson(path.join(context.integTestDir, 'cdk.json'), cdkJson);
+
+  await shell.shell(['cdk', 'synth']);
+
+})));

packages/aws-cdk-lib/aws-ec2/lib/restrict-default-security-group-handler/.is_custom_resource

@@ -440,7 +440,7 @@ describe('code', () => {
       // then
       Template.fromStack(stack).hasResource('AWS::Lambda::Function', {
         Metadata: {
-          [cxapi.ASSET_RESOURCE_METADATA_PATH_KEY]: 'asset.7bbf7edf9881819a1b91e5b02acae3e3973f96fa93325c676a1285351ddacc62',
+          [cxapi.ASSET_RESOURCE_METADATA_PATH_KEY]: Match.stringLikeRegexp('asset\\.[0-9a-f]+'),
           [cxapi.ASSET_RESOURCE_METADATA_IS_BUNDLED_KEY]: false,
           [cxapi.ASSET_RESOURCE_METADATA_PROPERTY_KEY]: 'Code',
         },