name: Dockage CI

on:
  push:
    branches: [ "master" ]
  pull_request:
    branches: [ "*" ]

jobs:
  docker:
    runs-on: ubuntu-latest
    strategy:
      matrix:
        alpine: [ "3.13" ]
        variant: [ "", "openrc" ]
        latest: [ false ]
        include:
          - alpine: 3.16
            variant: ""
            latest: true
    steps:
      - name: Checkout
        uses: actions/checkout@v2

      - name: Docker metadata
        id: meta
        uses: docker/metadata-action@v4
        with:
          images: |
            dockage/alpine
          tags: |
            type=raw,value=${{ matrix.alpine }},enable=${{ matrix.variant == '' }}
            type=raw,value=${{ matrix.alpine }}-${{ matrix.variant }},enable=${{ matrix.variant != '' }}
            type=raw,value=latest,enable=${{ matrix.latest }}

      - name: Set up Docker Buildx
        uses: docker/setup-buildx-action@v2

      - name: Login to DockerHub
        if: ${{ github.event_name != 'pull_request' }}
        uses: docker/login-action@v2
        with:
          username: ${{ secrets.DOCKERHUB_USERNAME }}
          password: ${{ secrets.DOCKERHUB_PASSWORD }}

      - name: Build images
        uses: docker/bake-action@v2
        with:
          push: ${{ github.ref == 'refs/heads/master' }}
          targets: ${{ matrix.variant }}
          files: |
            ${{ steps.meta.outputs.bake-file }}
            ./docker-bake.hcl
        env:
          ALPINE_VERSION: ${{ matrix.alpine }}

      - name: Docker Hub Description
        uses: peter-evans/dockerhub-description@v3
        if: ${{ github.event_name == 'push' && github.ref == 'refs/heads/master' }}
        with:
          username: ${{ secrets.DOCKERHUB_USERNAME }}
          password: ${{ secrets.DOCKERHUB_PASSWORD }}
          short-description: ${{ github.event.repository.description }}