Building multiple Gradle projects in Jenkins with AWS CodePipeline
I would start common build, when changes happened on any of 3 repos. With say 5 minutes delay, to have single build, even if changes are introduced to more then one repo.
I can't see good way to deal with deployment in other way than using eb deploy... old way... Please install aws tools at your jenkins machine. Create deployment job triggered on successful build. And put bash script doing deployment there. Please put more details about your deployment, that way I can help with deployment script.