name: Docker image CI/CD

concurrency:
  group: ${{ github.workflow }}-${{ github.ref }}
  cancel-in-progress: true

env:
  DOCKER_IMAGE_NAME: woodchen/firefox
  PLATFORMS: linux/amd64,linux/386,linux/arm/v7,linux/arm64/v8

on:
  push:
    branches: '*'
  pull_request:

jobs:
  build:
    name: Build image
    runs-on: ubuntu-latest

    steps:
      - name: Free disk space
        uses: jlumbroso/free-disk-space@main
        with:
          tool-cache: true
          android: true
          dotnet: true
          haskell: true
          large-packages: true
          docker-images: true
          swap-storage: false

      - name: Prepare
        id: prep
        run: |
          # Set Docker container tag to latest
          TAGS="${{ env.DOCKER_IMAGE_NAME }}:latest"
          
          # Print results.
          echo "::group::Results"
          echo "Github reference: $GITHUB_REF"
          echo "Docker container tag(s): $TAGS"
          echo "::endgroup::"
          
          # Export outputs.
          echo "tags=${TAGS}" >> $GITHUB_OUTPUT

      - name: Checkout
        uses: actions/checkout@v4

      - name: Setup QEMU
        uses: docker/setup-qemu-action@v3
        with:
          platforms: arm,arm64,ppc64le,mips64,s390x

      - name: Setup Docker Buildx
        uses: docker/setup-buildx-action@v3

      - name: Login to DockerHub
        uses: docker/login-action@v3
        with:
          username: ${{ secrets.DOCKERHUB_USERNAME }}
          password: ${{ secrets.DOCKERHUB_PASSWORD }}

      - name: Build and push
        uses: docker/build-push-action@v6
        with:
          context: .
          push: true
          platforms: ${{ env.PLATFORMS }}
          tags: ${{ steps.prep.outputs.tags }}
          cache-from: type=gha,scope=${{ env.DOCKER_IMAGE_NAME }}
          cache-to: type=gha,mode=max,scope=${{ env.DOCKER_IMAGE_NAME }}