composition.yaml

apiVersion: apiextensions.crossplane.io/v1
kind: Composition
metadata:
  name: example
spec:
  compositeTypeRef:
    apiVersion: example.crossplane.io/v1beta1
    kind: XR
  mode: Pipeline
  pipeline:
  - step: create-a-bucket
    functionRef:
      name: function-go-templating
    input:
      apiVersion: gotemplating.fn.crossplane.io/v1beta1
      kind: GoTemplate
      source: Inline
      inline:
        template: |
          apiVersion: s3.aws.upbound.io/v1beta1
          kind: Bucket
          metadata:
            annotations:
              gotemplating.fn.crossplane.io/composition-resource-name: bucket
          spec:
            forProvider:
              region: {{ .observed.composite.resource.spec.region }}
  # If the above Bucket becomes ready, this function will mark the XR as ready.
  # crossplane beta render doesn't support showing whether an XR is ready, so
  # unfortunately you'll have to trust that this is working.
  # See https://github.com/crossplane/crossplane/issues/4810.
  - step: automatically-detect-ready-composed-resources
    functionRef:
      name: function-auto-ready