---
- name: install required packages
  become: true
  ansible.builtin.apt:
    update_cache: true
    force_apt_get: true
    cache_valid_time: 3600
    pkg:
      - curl
      - jq

- name: find if binary is already installed
  ansible.builtin.file:
    path: '{{ kubectl_binary_path }}'
  register: kubectl_stat
  changed_when: false
  failed_when: false

- name: find current installed version
  when: kubectl_stat.state != "absent"
  ansible.builtin.shell: "{{ kubectl_binary_path }} version --client=true --output=json | jq --raw-output '.clientVersion.gitVersion'"
  changed_when: false
  register: kubectl_local_version_exec

- name: find latest available version
  connection: local
  ansible.builtin.command: curl -L -s https://dl.k8s.io/release/stable.txt
  register: latest_kubectl_version_exec
  when: kubectl_install_version is falsy or kubectl_install_version == "latest"
  changed_when: false

- name: set kubectl facts
  ansible.builtin.set_fact:
    kubectl_latest_version_available: '{{ latest_kubectl_version_exec.get("stdout", "") if latest_kubectl_version_exec is defined }}'
    kubectl_local_version: '{{ kubectl_local_version_exec.get("stdout", "") if kubectl_local_version_exec is defined }}'
    kubectl_target_install_version: '{{ kubectl_install_version if kubectl_install_version != "latest" else latest_kubectl_version_exec.get("stdout", "") }}'

- name: install binary
  become: true
  when: kubectl_stat.state == "absent" or (kubectl_local_version != kubectl_target_install_version and kubectl_install_version is not falsy)
  ansible.builtin.get_url:
    url: "https://dl.k8s.io/release/{{ kubectl_target_install_version }}/bin/linux/amd64/kubectl"
    dest: /usr/local/bin/kubectl
    owner: root
    group: root
    mode: '0755'
    force: true