I'm trying to set up an AWS CodeBuild project to run tests to validate PRs and commits on a GitHub repository.
Because of the nature of the repo (a monorepo combining several ML models):
- I need to restrict down to only run tests associated with files changed in the PR/commit to keep time+cost under control, but
- The tests will typically require reference to other un-changed files in the repo: So can't just only pull changed files through to the build container.
How can a running CodeBuild build triggered by a GitHub PR (as per the docs here) 'see' which files are changed by the PR to selectively execute tests?