Fastly Clone, Update Backend, and Activate

arazzo: 1.0.1
info:
  title: Fastly Clone, Update Backend, and Activate
  summary: Clone the current version, change a backend on the clone, then activate the new version.
  description: >-
    Fastly configuration is immutable once a version is active, so safe changes
    are made by cloning the live version into a fresh draft, editing the clone,
    and activating it. This workflow clones a service version, updates the
    address of an existing backend on the clone, and activates the resulting
    version. Every step spells out its request inline so the flow can be read
    and executed without opening the underlying OpenAPI description.
  version: 1.0.0
sourceDescriptions:
- name: backendApi
  url: ../openapi/fastly-backend-api-openapi.yml
  type: openapi
- name: serviceVersionApi
  url: ../openapi/fastly-service-version-api-openapi.yml
  type: openapi
workflows:
- workflowId: clone-update-backend-activate
  summary: Clone a version, repoint a backend, and activate the clone.
  description: >-
    Clones the supplied service version into a new draft, updates an existing
    backend's address on the cloned version, and activates the clone.
  inputs:
    type: object
    required:
    - apiToken
    - serviceId
    - versionId
    - backendName
    - backendAddress
    properties:
      apiToken:
        type: string
        description: The Fastly API token used to authenticate requests.
      serviceId:
        type: string
        description: The alphanumeric identifier of the service.
      versionId:
        type: integer
        description: The version number to clone.
      backendName:
        type: string
        description: The name of the existing backend to update.
      backendAddress:
        type: string
        description: The new hostname or IP address for the backend.
  steps:
  - stepId: cloneVersion
    description: Clone the supplied version into a new editable draft version.
    operationId: cloneServiceVersion
    parameters:
    - name: Fastly-Key
      in: header
      value: $inputs.apiToken
    - name: service_id
      in: path
      value: $inputs.serviceId
    - name: version_id
      in: path
      value: $inputs.versionId
    successCriteria:
    - condition: $statusCode == 200
    outputs:
      clonedVersion: $response.body#/number
  - stepId: updateBackend
    description: Repoint the named backend on the cloned version to the new address.
    operationId: updateBackend
    parameters:
    - name: Fastly-Key
      in: header
      value: $inputs.apiToken
    - name: service_id
      in: path
      value: $inputs.serviceId
    - name: version_id
      in: path
      value: $steps.cloneVersion.outputs.clonedVersion
    - name: backend_name
      in: path
      value: $inputs.backendName
    requestBody:
      contentType: application/x-www-form-urlencoded
      payload:
        address: $inputs.backendAddress
    successCriteria:
    - condition: $statusCode == 200
    outputs:
      updatedAddress: $response.body#/address
  - stepId: activateVersion
    description: Activate the cloned version so the new backend address goes live.
    operationId: activateServiceVersion
    parameters:
    - name: Fastly-Key
      in: header
      value: $inputs.apiToken
    - name: service_id
      in: path
      value: $inputs.serviceId
    - name: version_id
      in: path
      value: $steps.cloneVersion.outputs.clonedVersion
    successCriteria:
    - condition: $statusCode == 200
    outputs:
      active: $response.body#/active
  outputs:
    clonedVersion: $steps.cloneVersion.outputs.clonedVersion
    updatedAddress: $steps.updateBackend.outputs.updatedAddress
    active: $steps.activateVersion.outputs.active