roles/ensure-nodejs-fork/tasks/main.yaml

- name: Ensure we know what version of node to install
  assert:
    that: node_version is defined

- name: Check installed Node version
  command: node --version
  register: node_installed_version
  failed_when: false

- name: Install NodeJS when it is not installed with the required version
  include_tasks: install-nodejs.yaml
  when:
    - node_installed_version.rc != 0 or
          (node_version | string | trim) !=
          (node_installed_version.stdout
          | regex_replace('^v(?P<majorVersion>[^.]+).*$', '\\g<majorVersion>')
          | trim)