---
- hosts: vFWDT
  gather_facts: no
  remote_user: ubuntu
  tasks:
  - debug: var="new_software_version"
    failed_when: new_software_version is not defined
  - debug: var="existing_software_version"
    failed_when: existing_software_version is not defined
  - name: Check if version is known
    stat:
      path: /opt/config/version.txt
    register: version_file
  - name: Default version
    shell: echo '{{existing_software_version}}' >> /opt/config/version.txt
    when: version_file.stat.exists == false
    become: true
  - name: Read OLD Software Version
    shell: cat /opt/config/version.txt
    register: old_version
    become: true
  - name: Check existing version
    debug:
      msg: "{{old_version.stdout}} == {{existing_software_version}}"
    failed_when: old_version.stdout != existing_software_version
  - name: Check if upgrade is needed
    debug:
      msg: "{{old_version.stdout}} -> {{new_software_version}}"
    failed_when: old_version.stdout == new_software_version