I have a single Cloud Source Repository with multiple projects. I am able to create a cloudbuild.yaml file in the repo root that builds all projects. However, I don't want to have a build trigger that rebuilds all of the projects since most commits will be for a single project. Ideally I would like to have a cloudbuild.yaml file in each project subdirectory and a build trigger that detects changes in the project subdirectory of the repository. Is something like this possible?
As a possible workaround, I believe I may be able to keep my cloudbuild.yaml in the repository root and create a custom step that will get the commit sha (via the COMMIT_SHA substitution) and then get the list of files committed (via "git show --name-only --pretty=format: $COMMIT_SHA") to determine which project should be built and what image should be created. An alternative may be to have a tagging naming convention that will contain the project name and basing the trigger on that but I don't want to tag each commit.
Note, it seems like build triggers work very well when you have multiple repos but we made the decision to go with a mono repo and I don't want to rehash that debate in this question. I'd like to understand how to best use the Build Triggers in a mono repo.
