CDK app example impl. (set RemovalPolicy = "DELETE" if performing deployment to 'dev' stage)

app.ts

#!/usr/bin/env node
import 'source-map-support/register';
import * as cdk from 'aws-cdk-lib';
import { IConstruct } from 'constructs';
import { MyStack } from '../lib/my-stack';

const app = new cdk.App();

const availableStages = ['dev', 'stg', 'prod'] as const;
type Stage = typeof availableStages[number];

function isValidStage(stage: string): stage is Stage {
  return availableStages.includes(stage as Stage);
}

const stage = app.node.tryGetContext('stage');

if (!isValidStage(stage)) {
  throw new Error(`Invalid stage: ${stage}`);
}

new MyStack(app, 'MyStack', {});

// Add tags to all resources
cdk.Tags.of(app).add('Project', 'MyProject');

// Apply removal policy to all resources in given node
class EnforceDeletionPolicy implements cdk.IAspect {
  public visit(node: IConstruct): void {
    if (node instanceof cdk.CfnResource) {
      node.applyRemovalPolicy(cdk.RemovalPolicy.DESTROY);
    }
  }
}

// Apply a policy to all resources in the 'dev' stage
if (stage === 'dev') {
  cdk.Aspects.of(app).add(new EnforceDeletionPolicy());
}

Blog post:

AWS CDK の慣用句的テクニックの紹介 - 特定のデプロイステージにのみ適用する設定を Aspects で実装する

https://blog.serverworks.co.jp/2024/09/17/160000