---
- name: build Alpine application image
  hosts: localhost
  gather_facts: false
  vars:
    default_alpine_version: 3.11.5
  vars_prompt:
    - name: aws_account
      prompt: Please specify AWS ECR account ID
      private: no
    - name: aws_region
      prompt: Please specify AWS region
      default: "{{ lookup('env', 'AWS_REGION') }}"
      private: no
    - name: alpine_version
      prompt: Please specify Alpine Linux version
      default: "{{ default_alpine_version }}"
      private: no
    - name: package_name
      prompt: Please specify package name
      private: no
    - name: package_version
      prompt: Please specify package version
      private: no
  tasks:
    - name: sanity check
      assert:
        that: package_name | length > 0
        fail_msg: no package name provided

    - name: obtain package version
      block:
        - name: obtain package information
          uri:
           url: "https://pkgs.alpinelinux.org/packages?name={{ package_name }}&branch=v{{ alpine_version.split('.')[0:2] | join('.') }}&arch=x86_64"
           return_content: yes
          register: pkg_query

        - name: extract package version
          set_fact:
            package_version: "{{ package_info.Version }}"
          vars:
            response_lines: "{{ ( pkg_query.content | trim ).split('\n') }}"
            info_titles: "{{ response_lines | select('search', '<th>') | map('regex_replace', '<th>(.*)</th>', '\\1') | map('trim') | list }}"
            info_values: "{{ response_lines | select('search', '<td.*>') | map('regex_replace', '<td(.*)>(.*)</td>', '\\2')| map('trim') | list }}"
            package_info: "{{ dict(info_titles | zip(info_values)) }}"

      when: package_version | length == 0

    - name: configure image version
      replace:
        path: "{{ lookup('env', 'HOME') }}/alpine-{{ package_name }}/Dockerfile"
        regexp: '^FROM alpine:.*$'
        replace: "FROM alpine:{{ alpine_version }}"

    - name: build image
      podman_image:
        name: "{{ ecr_registry }}/{{ package_name }}:alpine-{{ alpine_version }}-{{ package_version }}"
        path: "{{ lookup('env', 'HOME') }}/alpine-{{ package_name }}/"
      vars:
        ecr_registry: "{{ aws_account }}.dkr.ecr.{{ aws_region }}.amazonaws.com"