Ansible: Higher Order Notification Handlers

highernotify.yml

---
# Store the notification in a variable.  We'll check it later.
# First, set the variable.  We're using "blah".
- hosts: all
  gather_facts: false
  tasks:
   - set_fact: blah=false
   
# Now do some other stuff.  Use notify to get the same behavior as a normal handler.
# Alternatively, just use set_fact with when.  They're equivalent.
- hosts: all
  tasks:
   - shell: "true"
     notify: meta_notify
  handlers:
   - name: meta_notify
     set_fact: blah=true
- hosts: all
  tasks:
   - shell: "true"
     notify: meta_notify
  handlers:
   - name: meta_notify
     set_fact: blah=true
     
# This needs to come after all the plays that can notify the handler.
# This can be wrapped in a role, too.
# The meta_notify handlers can also be wrapped in a dependent role in the meta/main.yml for roles that need it.
- hosts: all
  tasks:
   - debug: msg=hello
     when: blah