AWS Technical Essentials Practice

The most appropriate choice for automating the merging of multiple code changes is AWS CodeCommit. This service acts as a fully managed source control service that makes it easy for teams to host secure and scalable Git repositories. CodeCommit enables collaborative development, allowing multiple developers to work on code simultaneously while handling the complexity of merging changes efficiently.

With CodeCommit, you can create branches for different features or versions, and when changes are made in those branches, they can be merged into the main codebase through pull requests. This process includes automated potential merge conflict detection and resolution strategies. It streamlines this part of the development workflow, greatly enhancing productivity and ensuring that teams can focus more on writing code rather than managing changes.

AWS CodePipeline primarily focuses on automating the entire software release process, including building, testing, and deploying applications, but it does not specifically automate code merging. AWS CodeBuild is a service designed to compile source code, run tests, and produce software packages that can be deployed, but again, it does not handle merging code. AWS CodeDeploy is used for deploying applications to various compute services but does not encompass the merging of code changes either.