Github monorepo as source for AWS CodePipeline

Question

We use the monorepo approach for storing our source in github.

Is it currently possible to have CodePipeline trigger only on a commit to a particular subfolder.

This is something that is currently possible with TeamCity by setting a filter on the Source Repository but I've seen no example of this with CodePipeline.

Answer 1

We worked on exactly that issue. In short: It's possible with a little work around. You can set up a GitHub Webhook as source for a single AWS CodeBuild project. The project allows you to configure filters (file paths) on events pushed to that Webhook. Additionally, you add an S3 bucket and push the code referenced by the filtered event to that bucket. The bucket can be included as source stage for your CodePipeline.

We have documented our solution in a blog post: https://blog.codecentric.de/en/2019/05/codebuild-trigger-pipeline/

Answer 2

Looks like you answered your own question ;). The answer is not yet, but as a workaround, you can parse the list of changed files and derive the list of changed subfolders from that: https://forums.aws.amazon.com/thread.jspa?messageID=811027&#811027/.