name: Build Docker image

on:
  workflow_dispatch:
  push:
    branches:
      - '**'
    tags:
      - 'v*'
  # pull_request:

env:
  DOCKER_IMAGE: archivebox-ci

jobs:
  buildx:
    runs-on: ubuntu-latest
    steps:
      - name: Checkout
        uses: actions/checkout@v4
        with:
          submodules: true
          fetch-depth: 1

      - name: Set up QEMU
        uses: docker/setup-qemu-action@v3

      - name: Set up Docker Buildx
        id: buildx
        uses: docker/setup-buildx-action@v3
        with:
          version: latest
          install: true
          platforms: linux/amd64,linux/arm64

      - name: Builder instance name
        run: echo ${{ steps.buildx.outputs.name }}

      - name: Available platforms
        run: echo ${{ steps.buildx.outputs.platforms }}

      - name: Cache Docker layers
        uses: actions/cache@v3
        with:
          path: /tmp/.buildx-cache
          key: ${{ runner.os }}-buildx-${{ github.sha }}
          restore-keys: |
            ${{ runner.os }}-buildx-

      - name: Docker Login
        uses: docker/login-action@v3
        if: github.event_name != 'pull_request'
        with:
          username: ${{ secrets.DOCKER_USERNAME }}
          password: ${{ secrets.DOCKER_PASSWORD }}

      - name: Collect Docker tags
        # https://github.com/docker/metadata-action
        id: docker_meta
        uses: docker/metadata-action@v5
        with:
          images: archivebox/archivebox,nikisweeting/archivebox
          tags: |
              # :stable
              type=ref,event=branch
              # :0.7.3
              type=semver,pattern={{version}}
              # :0.7
              type=semver,pattern={{major}}.{{minor}}
              # :sha-463ea54
              type=sha
              # :latest
              type=raw,value=latest,enable=${{ github.ref == format('refs/heads/{0}', 'stable') }}

      - name: Build and push
        id: docker_build
        uses: docker/build-push-action@v5
        with:
          context: ./
          file: ./Dockerfile
          builder: ${{ steps.buildx.outputs.name }}
          push: ${{ github.event_name != 'pull_request' }}
          tags: ${{ steps.docker_meta.outputs.tags }}
          cache-from: type=local,src=/tmp/.buildx-cache
          cache-to: type=local,dest=/tmp/.buildx-cache-new
          platforms: linux/amd64,linux/arm64

      - name: Image digest
        run: echo ${{ steps.docker_build.outputs.digest }}

      - name: Update README
        uses: peter-evans/dockerhub-description@v4
        with:
          username: ${{ secrets.DOCKER_USERNAME }}
          password: ${{ secrets.DOCKER_PASSWORD }}
          repository: archivebox/archivebox

      # This ugly bit is necessary if you don't want your cache to grow forever
      # until it hits GitHub's limit of 5GB.
      # Temp fix
      # https://github.com/docker/build-push-action/issues/252
      # https://github.com/moby/buildkit/issues/1896
      - name: Move cache
        run: |
          rm -rf /tmp/.buildx-cache
          mv /tmp/.buildx-cache-new /tmp/.buildx-cache