cdk-examples | AWS CDK Examples Repository | AWS library

TL;DR: What is the purpose and function of prepare(): void method of AWS CDK's Construct class? How and when am I supposed to use/avoid it?

The documentation on prepare() says:

...

What is the purpose of the app.synth() line in AWS CDK applications? For example it can be seen here on line 29: https://github.com/aws-samples/aws-cdk-examples/blob/master/typescript/ecs/fargate-application-load-balanced-service/index.ts

I have looked at the CDK docs but I cannot find what the actual purpose of that function is. As I understand it, the app is automatically synthesized upon cdk deploy or cdk synth. I also took the example shown in repo linked above, commented out the app.synth() line, deployed it, and it seemed to work as expected. Therefore I'm wondering if I'm missing something when it comes to the purpose of app.synth()

I've been experimenting with using the new AWS CDK pipelines construct (https://docs.aws.amazon.com/cdk/api/latest/docs/pipelines-readme.html), and have successfully setup a couple of projects, including following the blog post announcement here: https://aws.amazon.com/blogs/developer/cdk-pipelines-continuous-delivery-for-aws-cdk-applications/.

However, as soon as I try to add a dependency to my lambdas the build fails with a

lib/lambda/handler.ts(2,24): error TS2307: Cannot find module 'stripe' or its corresponding type declarations.

I have installed a package.json file and the node_modules in the directory with the lambdas, tried zipping the lambdas and node_modules, tried uploading the zip file with the console, and tried getting the 'buildCommand' during the 'synthAction' step to install the dependencies. Nothing works.

The asset appears to get created in the cdk.out directory, and code changes are being uploaded, but node_modules themselves never get packaged along with the lambda functions.

I am using the 'SimpleSynthAction.standardNpmSynth' action, along with an 'npm run build' command in the 'buildCommand' step.

I've looked at Lambda can't find modules from outer folders when deployed with CDK, How to install dependencies of lambda functions upon cdk build with AWS CDK and https://github.com/aws-samples/aws-cdk-examples/issues/110#issuecomment-550506116 without luck.

What am I missing?

I am trying to deploy an API Gateway with a custom domain. (no functions, just a common API Gateway that other stacks can then import and use)

bin/api-app.ts:

Working on AWS CDK TYPESCRIPT to deploy the Beanstalk app.i was able to setup a beanstalk app using AWS CDK Typescript but could not find a way to set up it in existing VPC with high availability. this is my ebstack.ts

I'm migrating a static website hosted on Amazon S3 to use CDK for deployment, following the example. I want to redirect from www.mydomain.com to mydomain.com so I have S3 buckets for both, and the www one redirects to the apex domain. They're both fronted by CloudFront. I had all this working before using CDK, but after migrating I'm getting an AccessDenied error when accessing the www URL. The code to deploy the buckets looks like this: