Ubuntu Idempotent Ansible Install Check

check_ansible.sh

#!/usr/bin/env bash
set -euo pipefail

output="$(apt-cache policy ansible)"
installed="$(echo "$output" | sed -n -r 's/^(.*)(Installed: )(.*)$/\3/p')"
candidate="$(echo "$output" | sed -n -r 's/^(.*)(Candidate: )(.*)$/\3/p')"

if [[ $installed != "$candidate" ]]; then
  echo Install Ansible
  curl https://packages.microsoft.com/keys/microsoft.asc | sudo apt-key add -
  sudo apt update
  sudo apt install --yes software-properties-common
  sudo apt-add-repository --yes --update ppa:ansible/ansible
  sudo apt install --yes ansible
else
  echo Ansible up to date
fi