---
- name: Install Git build dependency
  ansible.builtin.apt:
    name: git
    state: present
    update_cache: true
    cache_valid_time: 3600
  when: seriatim_manage_build_dependencies

- name: Install Go build dependency
  community.general.snap:
    name: go
    state: present
    classic: true
    channel: "{{ seriatim_go_snap_channel }}"
  when: seriatim_manage_build_dependencies

- name: Resolve Git executable
  ansible.builtin.command:
    argv:
      - /usr/bin/which
      - git
  register: seriatim_git_path_result
  changed_when: false
  failed_when: seriatim_git_path_result.rc != 0

- name: Verify configured Go executable exists
  ansible.builtin.stat:
    path: "{{ seriatim_go_binary }}"
    follow: true
  register: seriatim_go_binary_stat

- name: Require configured Go executable
  ansible.builtin.assert:
    that:
      - seriatim_go_binary_stat.stat.exists
      - seriatim_go_binary_stat.stat.isreg
      - seriatim_go_binary_stat.stat.executable
    fail_msg: "Configured Go executable is unavailable: {{ seriatim_go_binary }}"

- name: Read Go compiler version
  ansible.builtin.command:
    argv:
      - "{{ seriatim_go_binary }}"
      - version
  register: seriatim_go_version_result
  changed_when: false

- name: Extract Go compiler version components
  ansible.builtin.set_fact:
    seriatim_go_version_parts: >-
      {{ seriatim_go_version_result.stdout
         | regex_findall('go([0-9]+)\.([0-9]+)')
         | first
         | default([]) }}

- name: Require supported Go compiler version
  ansible.builtin.assert:
    that:
      - seriatim_go_version_result.stdout is regex('^go version go[0-9]+\.[0-9]+(?:\.[0-9]+)? ')
      - seriatim_go_version_parts | length == 2
      - (seriatim_go_version_parts[0] | int > 1) or
        (seriatim_go_version_parts[0] | int == 1 and seriatim_go_version_parts[1] | int >= 25)
    fail_msg: >-
      Seriatim requires Go 1.25 or newer; detected
      {{ seriatim_go_version_result.stdout | default('no usable version output') }}.