ansible.azure.automation/roles/azure_disk/tasks/main.yml

---
- name: list disk
  include: list.yml
  vars:
    disk: "{{ item }}"
  when:
    - action is defined 
    - action == 'list'
    - (disks | default([], true) | length) > 0
  with_items: "{{ disks }}"

- name: In disk state
  include: "{{ item.state | default('present', true) }}.yml"
  vars:
    disk: "{{ item }}"
  when:
    - action is undefined 
    - (disks | default([], true) | length) > 0
  with_items: "{{ disks }}"

- name: Update/create disk
  include: present.yml
  vars:
    disk: "{{ item }}"
  when:
    - action is defined 
    - action == 'present'
    - (disks | default([], true) | length) > 0
  with_items: "{{ disks }}"

- name: Delete disk
  include: absent.yml
  vars:
    disk: "{{ item }}"
  when:
    - action is defined 
    - action == 'absent'
    - (disks | default([], true) | length) > 0
  with_items: "{{ disks }}"
...