title: How to make CICD work for multiple repositories dependent with each other
body: <p>if a system is deployed with code from multiple repositories, and these repositories are dependent. i.e. the system works only if a code is updated to one repository, and the corresponding code is updated to another repository at the same time. Then in this case, How should I make CICD work? </p>
  
  <p>BTW, I have created an AWS Codepipeline for one repository, and I can do the same thing for another repository. But if these two repositories have to sync with each other, I am not sure what else I need to do with Codepipeline. Thanks.</p>