Is AWS CDK generating nested cdk.out directories during synthesis?

Whilst working on my AWS CDK project for educational purposes, I found myself immersed in learning TypeScript, node.js, npm, and all related concepts simultaneously. Despite the mishap that occurred, requiring me to restart from the Github repository rather than my local copy, everything seemed to be going smoothly.

After cloning the Github repository onto my computer, I proceeded to run npm install to install dependencies followed by cdk synth, which had been functioning perfectly just moments before the need to clone the repo.

To my surprise, the command now took an eternity to execute. Upon investigation, I discovered that it was generating recursive cdk.out directories like this:

https://i.sstatic.net/WOCyp.png

If anyone could shed some light on what might be causing this issue, I would greatly appreciate it :)

typescriptamazon-web-servicesnpmaws-cdk

Answer №1

Success! It took a good 2 hours of digging, but I finally uncovered the culprit.

It turns out that the issue lies within the Lambda stack included in my application. The problematic line causing all the trouble is as follows:

code: lambda.Code.fromAsset(process.env.CODEBUILD_SRC_DIR_BuildLambda || "")

The problem arises because the environment variable is not defined on my local machine (yet it exists in the CodeBuild environment used for deploying my app). This causes it to default to an empty string "", which then triggers the lambda to include the entire CDK application itself and consequently leads to a recursive build.

Now, the challenge is to find a solution to this issue and figure out why it was working initially (possibly due to setting the CODEBUILD_SRC_DIR_BuildLambda variable locally).

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