test.yml

---
- name: Check if hoge in fuga
  shell: |
    grep -F 'hoge' roles/test/files/path/to/fuga
  register: res
  always_run: yes
  failed_when: no
  changed_when: res.rc == 0
  notify:
    - Ping only if hoge in fuga
- name: flush
  meta: flush_handlers

- name: unko
  shell: |
    uname -a