ansible-collection-prometheus/roles/influxdb_exporter/tasks/preflight.yml

---
- name: Common preflight
  ansible.builtin.include_role:
    name: prometheus.prometheus._common
    tasks_from: preflight.yml

- name: Assert usage of systemd as an init system
  ansible.builtin.assert:
    that: ansible_service_mgr == 'systemd'
    msg: "This role only works with systemd"

- name: Naive assertion of proper listen address
  ansible.builtin.assert:
    that:
      - >-
        [influxdb_exporter_web_listen_address] |
          flatten |
          reject('match', '.+:\\d+$') |
          list |
          length == 0

- name: Check if influxdb_exporter is installed
  ansible.builtin.stat:
    path: "{{ influxdb_exporter_binary_install_dir }}/influxdb_exporter"
  register: __influxdb_exporter_is_installed
  check_mode: false
  tags:
    - influxdb_exporter_install

- name: Discover latest version
  ansible.builtin.set_fact:
    influxdb_exporter_version: "{{ (lookup('url', 'https://api.github.com/repos/{{ _influxdb_exporter_repo }}/releases/latest', headers=_influxdb_exporter_github_api_headers,
                            split_lines=False) | from_json).get('tag_name') | replace('v', '') }}"
  run_once: true
  until: influxdb_exporter_version is version('0.0.0', '>=')
  retries: 10
  when:
    - influxdb_exporter_version == "latest"
    - influxdb_exporter_binary_local_dir | length == 0
    - not influxdb_exporter_skip_install

- name: Get influxdb_exporter binary checksum
  when:
    - influxdb_exporter_binary_local_dir | length == 0
    - not influxdb_exporter_skip_install
  block:
    - name: Get checksum list from github
      ansible.builtin.set_fact:
        __influxdb_exporter_checksums: "{{ lookup('url', influxdb_exporter_checksums_url, headers=_influxdb_exporter_github_api_headers, wantlist=True) | list }}"
      run_once: true
      until: __influxdb_exporter_checksums is search('linux-' + go_arch + '.tar.gz')
      retries: 10

    - name: "Get checksum for {{ go_arch }}"
      ansible.builtin.set_fact:
        __influxdb_exporter_checksum: "{{ item.split(' ')[0] }}"
      with_items: "{{ __influxdb_exporter_checksums }}"
      when:
        - "('linux-' + go_arch + '.tar.gz') in item"