How should the developer accomplish this?
When the Lambda function starts, use the Git CLI to clone the repository. Check the new file into the cloned repository and push the change.
After the new file is created in Lambda, use cURL to invoke the CodeCommit API. Send the file to the repository.
Use an AWS SDK to instantiate a CodeCommit client. Invoke the putjile method to add the file to the repository.
Upload the new file to an Amazon S3 bucket. Create an AWS Step Function to accept S3 events. In the Step Function, add the new file to the repository.
Explanations:
Cloning a repository with the Git CLI and managing Git operations within a Lambda function is not optimal. Lambda is ephemeral, and running the Git CLI inside the function adds unnecessary complexity and overhead. It also requires the Lambda function to manage state, which isn’t ideal for short-lived functions like Lambda.
Using cURL to invoke the CodeCommit API is not ideal because it involves manual HTTP requests and handling the raw API, which can be cumbersome and error-prone. Using an AWS SDK provides a higher-level interface to interact with CodeCommit.
Using the AWS SDK to interact with CodeCommit is the best approach. The AWS SDK has built-in methods, such asputFile, to add files directly to a CodeCommit repository. This is simple, secure, and optimal for Lambda functions.
Using S3 and Step Functions introduces unnecessary complexity. S3 is not needed in this scenario since the goal is to check the file directly into CodeCommit from Lambda. Step Functions would add complexity by introducing another service when the Lambda function can handle the task on its own.
I map out that the answer is:
Use an AWS SDK to instantiate a CodeCommit client. Invoke the putjile method to add the file to the repository.