Check whether a string is found through grep

grep.yaml

---

- name: Check if a string is found through grep
  hosts: all
  vars:
    filename: /tmp/rc.txt
    dst_folder: /tmp/hosts
  tasks:

    - name: delete the centralized file
      file:
        path: "{{ filename }}" 
        state: absent
      delegate_to: localhost
      run_once: true

    - name: ensure directory exists
      file:
        path: "{{ dst_folder }}"
        state: directory
      delegate_to: localhost
      run_once: true

    - name: grep the string
      shell: grep -ir stringToFind /the/path
      register: result
      failed_when: false # "result.rc not in [ 0, 1 ]"

    - name: print output to screen
      debug:
        msg: "{{ result.rc }}"

    - name: print output to file per host
      copy:
        content: "{{ result.rc }}"
        dest: "{{ dst_folder }}/{{ ansible_hostname }}.txt"
      delegate_to: localhost

    - name: print output to a centralized file
      lineinfile:
        path: "{{ filename }}"
        line: "{{ ansible_hostname }} {{ result.rc }}"
        create: true
      delegate_to: localhost
    

...