Google Cloud Platform Reset Project IAM Policy

arazzo: 1.0.1
info:
  title: Google Cloud Platform Reset Project IAM Policy
  summary: Read a project IAM policy, then overwrite it with a single owner binding using the etag.
  description: >-
    Resets a project's IAM policy to a known baseline. The workflow reads the
    current policy to capture its etag, overwrites the policy with a single
    owner binding while passing the captured etag for optimistic concurrency,
    and re-reads the policy to confirm the reset. This is useful for reverting a
    project to a controlled access baseline. 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: cloudResourceManagerApi
  url: ../openapi/cloud-resource-manager-openapi.yml
  type: openapi
workflows:
- workflowId: reset-project-iam-policy
  summary: Overwrite a project IAM policy with a single owner binding.
  description: >-
    Reads the current policy etag, sets a baseline owner-only policy, then
    re-reads to confirm.
  inputs:
    type: object
    required:
    - resource
    - ownerMember
    properties:
      resource:
        type: string
        description: The project resource, e.g. projects/12345.
      ownerMember:
        type: string
        description: The sole owner member to retain, e.g. user:[email protected].
  steps:
  - stepId: getPolicy
    description: >-
      Read the current IAM policy to capture its etag before the overwrite.
    operationId: cloudresourcemanager.projects.getIamPolicy
    parameters:
    - name: resource
      in: path
      value: $inputs.resource
    requestBody:
      contentType: application/json
      payload:
        options:
          requestedPolicyVersion: 3
    successCriteria:
    - condition: $statusCode == 200
    outputs:
      etag: $response.body#/etag
      previousBindings: $response.body#/bindings
  - stepId: resetPolicy
    description: >-
      Overwrite the policy with a single owner binding, passing the captured
      etag for optimistic concurrency.
    operationId: cloudresourcemanager.projects.setIamPolicy
    parameters:
    - name: resource
      in: path
      value: $inputs.resource
    requestBody:
      contentType: application/json
      payload:
        policy:
          version: 3
          etag: $steps.getPolicy.outputs.etag
          bindings:
          - role: roles/owner
            members:
            - $inputs.ownerMember
    successCriteria:
    - condition: $statusCode == 200
    outputs:
      newEtag: $response.body#/etag
  - stepId: confirmPolicy
    description: >-
      Re-read the policy to confirm only the owner binding remains.
    operationId: cloudresourcemanager.projects.getIamPolicy
    parameters:
    - name: resource
      in: path
      value: $inputs.resource
    requestBody:
      contentType: application/json
      payload:
        options:
          requestedPolicyVersion: 3
    successCriteria:
    - condition: $statusCode == 200
    outputs:
      bindings: $response.body#/bindings
  outputs:
    previousBindings: $steps.getPolicy.outputs.previousBindings
    newEtag: $steps.resetPolicy.outputs.newEtag
    bindings: $steps.confirmPolicy.outputs.bindings