GitHub Cloud Build Integration with multiple cloudbuild.yamls in monorepo

Question

GitHub\'s Google Cloud Build integration does not detect a cloudbuild.yaml or Dockerfile if it is not in the root of the repository.

When

Answer 1

You can do this by adding a cloudbuild.yaml in the root of your repository with a single gcr.io/cloud-builders/gcloud step. This step should:

1. Traverse each subdirectory or use find to locate additional cloudbuild.yaml files.
2. For each found cloudbuild.yaml, fork and submit a build by running gcloud builds submit.
3. Wait for all the forked gcloud commands to complete.

There's a good example of one way to do this in the root cloudbuild.yaml within the GoogleCloudPlatform/cloud-builders-community repo.

If we strip out the non-essential parts, basically you have something like this:

steps:
- name: 'gcr.io/cloud-builders/gcloud'
  entrypoint: 'bash'
  args:
  - '-c'
  - |
    for d in */; do
      config="${d}cloudbuild.yaml"
      if [[ ! -f "${config}" ]]; then
        continue
      fi

      echo "Building $d ... "
      (
        gcloud builds submit $d --config=${config}
      ) &
    done
    wait