multistep

Example multistep pipeline

Example Functions Pipeline with the 3 steps:

1. function-patch-and-transform
2. function-go-templating
3. function-patch-and-transform again

The more details mechanics of each step described below

1. function-patch-and-transform creates bucket
2. function-go-templating creates bucketACL and uses the data from the previous pipelines step to compose the resource spec

                region: {{ .desired.resources.bucket.resource.spec.forProvider.region }}

3. function-patch-and-transform is used again to patch the bucketACL with the data from XR spec. Notice that base is omitted and resource name is matching the one that is set by the function-go-templating with {{ setResourceNameAnnotation "bucketACL" }}

To render make render target is available:

crossplane beta render xr.yaml composition.yaml functions.yaml -r
---
apiVersion: example.crossplane.io/v1
kind: XR
metadata:
  name: example-xr
status:
  conditions:
  - lastTransitionTime: "2024-01-01T00:00:00Z"
    message: 'Unready resources: bucket, bucketACL'
    reason: Creating
    status: "False"
    type: Ready
---
apiVersion: s3.aws.upbound.io/v1beta1
kind: Bucket
metadata:
  annotations:
    crossplane.io/composition-resource-name: bucket
  generateName: example-xr-
  labels:
    crossplane.io/composite: example-xr
  ownerReferences:
  - apiVersion: example.crossplane.io/v1
    blockOwnerDeletion: true
    controller: true
    kind: XR
    name: example-xr
    uid: ""
spec:
  forProvider:
    region: eu-north-1
---
apiVersion: s3.aws.upbound.io/v1beta1
kind: BucketACL
metadata:
  annotations:
    crossplane.io/composition-resource-name: bucketACL
  generateName: example-xr-
  labels:
    crossplane.io/composite: example-xr
  ownerReferences:
  - apiVersion: example.crossplane.io/v1
    blockOwnerDeletion: true
    controller: true
    kind: XR
    name: example-xr
    uid: ""
spec:
  forProvider:
    acl: private
    bucketSelector:
      matchControllerRef: true
    region: eu-north-1

Notice that BucketACL is patched as expected

spec:
  forProvider:
    acl: private # acl value that is set on 3rd pipeline step is in place
    bucketSelector:
      matchControllerRef: true
    region: eu-north-1 # region value that is set on 2nd pipeline step is in place