roles/ensure-bazelisk/tasks/main.yaml

- name: Check if bazelisk is installed
  command: bash -c "type -p {{ bazelisk_executable }}"
  failed_when: false
  register: bazelisk_installed

- name: Ensure target directory exists
  file:
    state: directory
    path: "{{ bazelisk_target | dirname }}"
  when: bazelisk_installed.rc != 0

- name: Download bazelisk
  get_url:
    url: "{{ bazelisk_url }}"
    dest: "{{ bazelisk_target }}"
    mode: '0755'
  when: bazelisk_installed.rc != 0
  register: bazelisk_downloaded

# This will apply to further plays and playbooks
- name: Set bazelisk_executable fact
  set_fact:
    bazelisk_executable: "{{ bazelisk_target }}"
    cacheable: true
  when: bazelisk_downloaded is changed