---
# =============================================================================
# Gitea Act Runner - Docker Installation
# =============================================================================
#
# Installs Docker CE following the official Docker documentation:
# https://docs.docker.com/engine/install/ubuntu/
#
# Uses DEB822 format (.sources) as per current Docker documentation.
#
# =============================================================================

# Remove old/conflicting Docker packages that may interfere.
- name: Remove conflicting Docker packages
  ansible.builtin.apt:
    name:
      - docker.io
      - docker-doc
      - docker-compose
      - docker-compose-v2
      - podman-docker
      - containerd
      - runc
    state: absent
  failed_when: false

# Install packages required to add Docker's APT repository.
- name: Install Docker prerequisites
  ansible.builtin.apt:
    name:
      - ca-certificates
      - curl
    state: present

# Create directory for APT keyrings.
- name: Create keyrings directory
  ansible.builtin.file:
    path: /etc/apt/keyrings
    state: directory
    mode: '0755'

# Download Docker's official GPG key.
- name: Download Docker GPG key
  ansible.builtin.get_url:
    url: https://download.docker.com/linux/ubuntu/gpg
    dest: /etc/apt/keyrings/docker.asc
    mode: '0644'

# Get the dpkg architecture for the repository URL.
- name: Get dpkg architecture
  ansible.builtin.command: dpkg --print-architecture
  register: act_runner_dpkg_arch
  changed_when: false

# Add Docker's APT repository using DEB822 format.
# This is the modern format recommended by Docker documentation.
- name: Add Docker APT repository (DEB822 format)
  ansible.builtin.copy:
    dest: /etc/apt/sources.list.d/docker.sources
    mode: '0644'
    content: |
      Types: deb
      URIs: https://download.docker.com/linux/ubuntu
      Suites: {{ ansible_facts['distribution_release'] }}
      Components: stable
      Architectures: {{ act_runner_dpkg_arch.stdout }}
      Signed-By: /etc/apt/keyrings/docker.asc

# Update apt cache after adding repository.
- name: Update apt cache
  ansible.builtin.apt:
    update_cache: true
    cache_valid_time: 0  # Force update since we just added a new repo

# Install Docker CE and related packages.
- name: Install Docker packages
  ansible.builtin.apt:
    name:
      - docker-ce
      - docker-ce-cli
      - containerd.io
      - docker-buildx-plugin
      - docker-compose-plugin
    state: present

# Ensure Docker service is running and enabled on boot.
- name: Ensure Docker service is started and enabled
  ansible.builtin.systemd:
    name: docker
    state: started
    enabled: true