chore(app-staging-synthesizer): reduce the size of DefaultStagingStack template by 5KB

packages/@aws-cdk/app-staging-synthesizer-alpha/lib/default-staging-stack.ts

@@ -17,11 +17,27 @@ import {
   StackProps,
 } from 'aws-cdk-lib/core';
 import { StringSpecializer } from 'aws-cdk-lib/core/lib/helpers-internal';
+import * as cxapi from 'aws-cdk-lib/cx-api';
+import { Construct } from 'constructs';
 import { BootstrapRole } from './bootstrap-roles';
 import { FileStagingLocation, IStagingResources, IStagingResourcesFactory, ImageStagingLocation } from './staging-stack';
 
 export const DEPLOY_TIME_PREFIX = 'deploy-time/';
 
+/**
+ * This is a dummy construct meant to signify that a stack is utilizing
+ * the AppStagingSynthesizer. It does not do anything, and is not meant
+ * to be created on its own. This construct will be a part of the
+ * construct tree only and not the Cfn template. The construct tree is
+ * then encoded in the AWS::CDK::Metadata resource of the stack and
+ * injested in our metrics like every other construct.
+ */
+export class UsingAppStagingSynthesizer extends Construct {
+  constructor(scope: Construct, id: string) {
+    super(scope, id);
+  }
+}
+
 /**
  * User configurable options to the DefaultStagingStack.
  */
@@ -128,6 +144,12 @@ export class DefaultStagingStack extends Stack implements IStagingResources {
           throw new Error(`Stack ${stack.stackName} must be part of an App`);
         }
 
+        // Because we do not keep metrics in the DefaultStagingStack, we will inject
+        // a dummy construct into the stack using the DefaultStagingStack instead.
+        if (cxapi.ANALYTICS_REPORTING_ENABLED_CONTEXT) {
+          new UsingAppStagingSynthesizer(stack, `UsingAppStagingSynthesizer/${stack.stackName}`);
+        }
+
         const stackId = `StagingStack-${appId}-${context.environmentString}`;
         return new DefaultStagingStack(app, stackId, {
           ...options,
@@ -199,7 +221,10 @@ export class DefaultStagingStack extends Stack implements IStagingResources {
     super(scope, id, {
       ...props,
       synthesizer: new BootstraplessSynthesizer(),
+      analyticsReporting: false, // removing AWS::CDK::Metadata construct saves ~3KB
     });
+    // removing path metadata saves ~2KB
+    this.node.setContext(cxapi.PATH_METADATA_ENABLE_CONTEXT, false);
 
     this.appId = this.validateAppId(props.appId);
     this.dependencyStack = this;

packages/@aws-cdk/app-staging-synthesizer-alpha/test/app-staging-synthesizer.test.ts

@@ -121,6 +121,12 @@ describe(AppStagingSynthesizer, () => {
     expect(depStack.stackName).toEqual(`StagingStack-${APP_ID}`);
   });
 
+  test('stack has dummy construct for metrics', () => {
+    // WHEN
+    const dummyConstruct = stack.node.tryFindChild(`UsingAppStagingSynthesizer/${stack.stackName}`);
+    expect(dummyConstruct).toBeDefined();
+  });
+
   test('add file asset', () => {
     // WHEN
     const location = stack.synthesizer.addFileAsset({

packages/@aws-cdk/app-staging-synthesizer-alpha/test/integ.synth-default-resources.js.snapshot/cdk.out

@@ -1 +1 @@
-{"version":"31.0.0"}
+{"version":"32.0.0"}

packages/@aws-cdk/app-staging-synthesizer-alpha/test/integ.synth-default-resources.js.snapshot/integ.json

@@ -1,5 +1,5 @@
 {
-  "version": "31.0.0",
+  "version": "32.0.0",
   "testCases": {
     "integ-tests/DefaultTest": {
       "stacks": [

packages/@aws-cdk/app-staging-synthesizer-alpha/test/integ.synth-default-resources.js.snapshot/integtestsDefaultTestDeployAssert44C8D370.assets.json

@@ -1,5 +1,5 @@
 {
-  "version": "31.0.0",
+  "version": "32.0.0",
   "files": {
     "21fbb51d7b23f6a6c262b46a9caee79d744a3ac019fd45422d988b96d44b2a22": {
       "source": {

packages/@aws-cdk/app-staging-synthesizer-alpha/test/integ.synth-default-resources.js.snapshot/manifest.json

@@ -1,5 +1,5 @@
 {
-  "version": "31.0.0",
+  "version": "32.0.0",
   "artifacts": {
     "synthesize-default-resources.assets": {
       "type": "cdk:asset-manifest",
@@ -78,6 +78,15 @@
             "type": "aws:cdk:logicalId",
             "data": "lambdaecr2615DAF68"
           }
+        ],
+        "UsingDefaultStagingStacksynthesizedefaultresources": [
+          {
+            "type": "aws:cdk:logicalId",
+            "data": "UsingDefaultStagingStacksynthesizedefaultresources",
+            "trace": [
+              "!!DESTRUCTIVE_CHANGES: WILL_DESTROY"
+            ]
+          }
         ]
       },
       "displayName": "synthesize-default-resources"

packages/@aws-cdk/app-staging-synthesizer-alpha/test/integ.synth-default-resources.js.snapshot/synthesize-default-resources.assets.json

@@ -1,5 +1,5 @@
 {
-  "version": "31.0.0",
+  "version": "32.0.0",
   "files": {
     "68539effc3f7ad46fff9765606c2a01b7f7965833643ab37e62799f19a37f650": {
       "source": {

packages/@aws-cdk/app-staging-synthesizer-alpha/test/integ.synth-default-resources.js.snapshot/tree.json

@@ -8,6 +8,14 @@
         "id": "synthesize-default-resources",
         "path": "synthesize-default-resources",
         "children": {
+          "UsingAppStagingSynthesizer--synthesize-default-resources": {
+            "id": "UsingAppStagingSynthesizer--synthesize-default-resources",
+            "path": "synthesize-default-resources/UsingAppStagingSynthesizer--synthesize-default-resources",
+            "constructInfo": {
+              "fqn": "@aws-cdk/app-staging-synthesizer-alpha.UsingAppStagingSynthesizer",
+              "version": "0.0.0"
+            }
+          },
           "lambda-s3": {
             "id": "lambda-s3",
             "path": "synthesize-default-resources/lambda-s3",
@@ -1150,7 +1158,7 @@
           }
         },
         "constructInfo": {
-          "fqn": "aws-cdk-lib.Stack",
+          "fqn": "@aws-cdk/app-staging-synthesizer-alpha.DefaultStagingStack",
           "version": "0.0.0"
         }
       },
@@ -1167,7 +1175,7 @@
                 "path": "integ-tests/DefaultTest/Default",
                 "constructInfo": {
                   "fqn": "constructs.Construct",
-                  "version": "10.2.26"
+                  "version": "10.2.52"
                 }
               },
               "DeployAssert": {
@@ -1213,7 +1221,7 @@
         "path": "Tree",
         "constructInfo": {
           "fqn": "constructs.Construct",
-          "version": "10.2.26"
+          "version": "10.2.52"
         }
       }
     },