chore: remove sdkv2 from cloudformation-diff (#29730)

### Issue # (if applicable)

Closes #<issue number here>.

### Reason for this change



### Description of changes



### Description of how you validated changes



### Checklist
- [ ] My code adheres to the [CONTRIBUTING GUIDE](https://github.com/aws/aws-cdk/blob/main/CONTRIBUTING.md) and [DESIGN GUIDELINES](https://github.com/aws/aws-cdk/blob/main/docs/DESIGN_GUIDELINES.md)

----

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

Author: TheRealAmazonKendra

packages/@aws-cdk/cloudformation-diff/lib/diff-template.ts

@@ -1,12 +1,14 @@
 // The SDK is only used to reference `DescribeChangeSetOutput`, so the SDK is added as a devDependency.
 // The SDK should not make network calls here
-import type { CloudFormation } from 'aws-sdk';
+import type { DescribeChangeSetOutput as DescribeChangeSet } from '@aws-sdk/client-cloudformation';
 import * as impl from './diff';
 import * as types from './diff/types';
 import { deepEqual, diffKeyedEntities, unionOf } from './diff/util';
 
 export * from './diff/types';
 
+export type DescribeChangeSetOutput = DescribeChangeSet;
+
 type DiffHandler = (diff: types.ITemplateDiff, oldValue: any, newValue: any) => void;
 type HandlerRegistry = { [section: string]: DiffHandler };
 
@@ -45,7 +47,7 @@ const DIFF_HANDLERS: HandlerRegistry = {
 export function fullDiff(
   currentTemplate: { [key: string]: any },
   newTemplate: { [key: string]: any },
-  changeSet?: CloudFormation.DescribeChangeSetOutput,
+  changeSet?: DescribeChangeSetOutput,
   isImport?: boolean,
 ): types.TemplateDiff {
 
@@ -212,7 +214,7 @@ function deepCopy(x: any): any {
   return x;
 }
 
-function addImportInformation(diff: types.TemplateDiff, changeSet: CloudFormation.DescribeChangeSetOutput) {
+function addImportInformation(diff: types.TemplateDiff, changeSet: DescribeChangeSetOutput) {
   const imports = findResourceImports(changeSet);
   diff.resources.forEachDifference((logicalId: string, change: types.ResourceDifference) => {
     if (imports.includes(logicalId)) {
@@ -227,7 +229,7 @@ function makeAllResourceChangesImports(diff: types.TemplateDiff) {
   });
 }
 
-function filterFalsePositives(diff: types.TemplateDiff, changeSet: CloudFormation.DescribeChangeSetOutput) {
+function filterFalsePositives(diff: types.TemplateDiff, changeSet: DescribeChangeSetOutput) {
   const replacements = findResourceReplacements(changeSet);
   diff.resources.forEachDifference((logicalId: string, change: types.ResourceDifference) => {
     if (change.resourceType.includes('AWS::Serverless')) {
@@ -268,7 +270,7 @@ function filterFalsePositives(diff: types.TemplateDiff, changeSet: CloudFormatio
   });
 }
 
-function findResourceImports(changeSet: CloudFormation.DescribeChangeSetOutput): string[] {
+function findResourceImports(changeSet: DescribeChangeSetOutput): string[] {
   const importedResourceLogicalIds = [];
   for (const resourceChange of changeSet.Changes ?? []) {
     if (resourceChange.ResourceChange?.Action === 'Import') {
@@ -279,7 +281,7 @@ function findResourceImports(changeSet: CloudFormation.DescribeChangeSetOutput):
   return importedResourceLogicalIds;
 }
 
-function findResourceReplacements(changeSet: CloudFormation.DescribeChangeSetOutput): types.ResourceReplacements {
+function findResourceReplacements(changeSet: DescribeChangeSetOutput): types.ResourceReplacements {
   const replacements: types.ResourceReplacements = {};
   for (const resourceChange of changeSet.Changes ?? []) {
     const propertiesReplaced: { [propName: string]: types.ChangeSetReplacement } = {};

packages/@aws-cdk/cloudformation-diff/package.json

@@ -25,7 +25,6 @@
   "dependencies": {
     "@aws-cdk/aws-service-spec": "^0.0.61",
     "@aws-cdk/service-spec-types": "^0.0.61",
-    "aws-sdk": "2.1586.0",
     "chalk": "^4",
     "diff": "^5.2.0",
     "fast-deep-equal": "^3.1.3",
@@ -35,6 +34,7 @@
   "devDependencies": {
     "@aws-cdk/cdk-build-tools": "0.0.0",
     "@aws-cdk/pkglint": "0.0.0",
+    "@aws-sdk/client-cloudformation": "^3.529.1",
     "@types/jest": "^29.5.12",
     "@types/string-width": "^4.0.1",
     "fast-check": "^3.17.0",
@@ -64,4 +64,4 @@
       "dependencies/cdk-point-dependencies"
     ]
   }
-}
+}

packages/@aws-cdk/cloudformation-diff/test/diff-template.test.ts

@@ -1104,7 +1104,7 @@ describe('changeset', () => {
             ResourceType: 'AWS::S3::Bucket',
             Replacement: 'True',
             Details: [{
-              Evaluation: 'Direct',
+              Evaluation: 'Static',
               Target: {
                 Attribute: 'Properties',
                 Name: 'BucketName',
@@ -1153,7 +1153,7 @@ describe('changeset', () => {
             ResourceType: 'AWS::Lambda::Function', // The SAM transform is applied before the changeset is created, so the changeset has a Lambda resource here!
             Replacement: 'False',
             Details: [{
-              Evaluation: 'Direct',
+              Evaluation: 'Static',
               Target: {
                 Attribute: 'Properties',
                 Name: 'Code',

packages/aws-cdk/lib/api/util/cloudformation.ts

@@ -1,3 +1,5 @@
+// Temporarily pull this in to avoid creating conflicts with the sdks in this package
+import { DescribeChangeSetOutput } from '@aws-cdk/cloudformation-diff';
 import { SSMPARAM_NO_INVALIDATE } from '@aws-cdk/cx-api';
 import * as cxapi from '@aws-cdk/cx-api';
 import { CloudFormation } from 'aws-sdk';
@@ -311,7 +313,7 @@ export type CreateChangeSetOptions = {
 /**
  * Create a changeset for a diff operation
  */
-export async function createDiffChangeSet(options: PrepareChangeSetOptions): Promise<CloudFormation.DescribeChangeSetOutput | undefined> {
+export async function createDiffChangeSet(options: PrepareChangeSetOptions): Promise<DescribeChangeSetOutput | undefined> {
   // `options.stack` has been modified to include any nested stack templates directly inline with its own template, under a special `NestedTemplate` property.
   // Thus the parent template's Resources section contains the nested template's CDK metadata check, which uses Fn::Equals.
   // This causes CreateChangeSet to fail with `Template Error: Fn::Equals cannot be partially collapsed`.
@@ -327,7 +329,7 @@ export async function createDiffChangeSet(options: PrepareChangeSetOptions): Pro
   return uploadBodyParameterAndCreateChangeSet(options);
 }
 
-async function uploadBodyParameterAndCreateChangeSet(options: PrepareChangeSetOptions): Promise<CloudFormation.DescribeChangeSetOutput | undefined> {
+async function uploadBodyParameterAndCreateChangeSet(options: PrepareChangeSetOptions): Promise<DescribeChangeSetOutput | undefined> {
   try {
     const preparedSdk = (await options.deployments.prepareSdkWithDeployRole(options.stack));
     const bodyParameter = await makeBodyParameterAndUpload(
@@ -363,7 +365,7 @@ async function uploadBodyParameterAndCreateChangeSet(options: PrepareChangeSetOp
   }
 }
 
-async function createChangeSet(options: CreateChangeSetOptions): Promise<CloudFormation.DescribeChangeSetOutput> {
+async function createChangeSet(options: CreateChangeSetOptions): Promise<DescribeChangeSetOutput> {
   await cleanupOldChangeset(options.changeSetName, options.stack.stackName, options.cfn);
 
   debug(`Attempting to create ChangeSet with name ${options.changeSetName} for stack ${options.stack.stackName}`);
@@ -390,7 +392,8 @@ async function createChangeSet(options: CreateChangeSetOptions): Promise<CloudFo
   const createdChangeSet = await waitForChangeSet(options.cfn, options.stack.stackName, options.changeSetName, { fetchAll: options.willExecute });
   await cleanupOldChangeset(options.changeSetName, options.stack.stackName, options.cfn);
 
-  return createdChangeSet;
+  // TODO: Update this once we remove sdkv2 from the rest of this package
+  return createdChangeSet as DescribeChangeSetOutput;
 }
 
 export async function cleanupOldChangeset(changeSetName: string, stackName: string, cfn: CloudFormation) {

packages/aws-cdk/lib/diff.ts

@@ -1,8 +1,15 @@
 import { format } from 'util';
 import * as cxschema from '@aws-cdk/cloud-assembly-schema';
-import * as cfnDiff from '@aws-cdk/cloudformation-diff';
+import {
+  type DescribeChangeSetOutput,
+  type FormatStream,
+  type TemplateDiff,
+  formatDifferences,
+  formatSecurityChanges,
+  fullDiff,
+  mangleLikeCloudFormation,
+} from '@aws-cdk/cloudformation-diff';
 import * as cxapi from '@aws-cdk/cx-api';
-import { CloudFormation } from 'aws-sdk';
 import * as chalk from 'chalk';
 import { NestedStackTemplates } from './api/nested-stack-helpers';
 import { print, warning } from './logging';
@@ -24,18 +31,18 @@ export function printStackDiff(
   strict: boolean,
   context: number,
   quiet: boolean,
-  changeSet?: CloudFormation.DescribeChangeSetOutput,
+  changeSet?: DescribeChangeSetOutput,
   isImport?: boolean,
-  stream: cfnDiff.FormatStream = process.stderr,
+  stream: FormatStream = process.stderr,
   nestedStackTemplates?: { [nestedStackLogicalId: string]: NestedStackTemplates }): number {
 
-  let diff = cfnDiff.fullDiff(oldTemplate, newTemplate.template, changeSet, isImport);
+  let diff = fullDiff(oldTemplate, newTemplate.template, changeSet, isImport);
 
   // detect and filter out mangled characters from the diff
   let filteredChangesCount = 0;
   if (diff.differenceCount && !strict) {
-    const mangledNewTemplate = JSON.parse(cfnDiff.mangleLikeCloudFormation(JSON.stringify(newTemplate.template)));
-    const mangledDiff = cfnDiff.fullDiff(oldTemplate, mangledNewTemplate, changeSet);
+    const mangledNewTemplate = JSON.parse(mangleLikeCloudFormation(JSON.stringify(newTemplate.template)));
+    const mangledDiff = fullDiff(oldTemplate, mangledNewTemplate, changeSet);
     filteredChangesCount = Math.max(0, diff.differenceCount - mangledDiff.differenceCount);
     if (filteredChangesCount > 0) {
       diff = mangledDiff;
@@ -55,7 +62,7 @@ export function printStackDiff(
   let stackDiffCount = 0;
   if (!diff.isEmpty) {
     stackDiffCount++;
-    cfnDiff.formatDifferences(stream, diff, {
+    formatDifferences(stream, diff, {
       ...logicalIdMapFromTemplate(oldTemplate),
       ...buildLogicalToPathMap(newTemplate),
     }, context);
@@ -109,16 +116,16 @@ export function printSecurityDiff(
   oldTemplate: any,
   newTemplate: cxapi.CloudFormationStackArtifact,
   requireApproval: RequireApproval,
-  changeSet?: CloudFormation.DescribeChangeSetOutput,
+  changeSet?: DescribeChangeSetOutput,
 ): boolean {
-  const diff = cfnDiff.fullDiff(oldTemplate, newTemplate.template, changeSet);
+  const diff = fullDiff(oldTemplate, newTemplate.template, changeSet);
 
   if (difRequiresApproval(diff, requireApproval)) {
     // eslint-disable-next-line max-len
     warning(`This deployment will make potentially sensitive changes according to your current security approval level (--require-approval ${requireApproval}).`);
     warning('Please confirm you intend to make the following modifications:\n');
 
-    cfnDiff.formatSecurityChanges(process.stdout, diff, buildLogicalToPathMap(newTemplate));
+    formatSecurityChanges(process.stdout, diff, buildLogicalToPathMap(newTemplate));
     return true;
   }
   return false;
@@ -130,7 +137,7 @@ export function printSecurityDiff(
  * TODO: Filter the security impact determination based off of an enum that allows
  * us to pick minimum "severities" to alert on.
  */
-function difRequiresApproval(diff: cfnDiff.TemplateDiff, requireApproval: RequireApproval) {
+function difRequiresApproval(diff: TemplateDiff, requireApproval: RequireApproval) {
   switch (requireApproval) {
     case RequireApproval.Never: return false;
     case RequireApproval.AnyChange: return diff.permissionsAnyChanges;

packages/aws-cdk/test/diff.test.ts

@@ -405,7 +405,7 @@ describe('stack exists checks', () => {
         Changes: [
           {
             ResourceChange: {
-              Action: 'Dummy',
+              Action: 'Add',
               LogicalResourceId: 'Object',
             },
           },