apiVersion: apiextensions.crossplane.io/v1
kind: Composition
metadata:
  name: xtests.test.io
spec:
  compositeTypeRef:
    apiVersion: test.io/v1alpha1
    kind: XTest
  mode: Pipeline
  pipeline:
  - step: compose-a-resource-with-python
    functionRef:
      name: function-python
    input:
      apiVersion: python.fn.crossplane.io/v1beta1
      kind: Script
      script: |
        from crossplane.function.proto.v1 import run_function_pb2 as fnv1
        from crossplane.function import resource

        def compose(req: fnv1.RunFunctionRequest, rsp: fnv1.RunFunctionResponse):

          resource.update(
            rsp.desired.resources["test"],
            {"test": "test", "msg": "x"*1024*1024*3}
          )