name: Docker Build
on:
  push:
    tags:
      - 'v[0-9]+.[0-9]+.[0-9]+'
      - 'v[0-9]+.[0-9]+.[0-9]+-beta.rc[0-9]+'
    branches:
      - dev
      - beta
  pull_request:
    branches:
      - dev
      - main
  workflow_dispatch:
concurrency:
  group: docker-${{ github.event.pull_request.number || github.ref }}
  cancel-in-progress: true
jobs:
  build-docker-image:
    name: Build Docker Image
    runs-on: ubuntu-24.04
    env:
      CAN_PUSH: ${{ github.event_name == 'push' || github.event.pull_request.head.repo.full_name == github.repository }}
    steps:
      - name: Checkout
        uses: actions/checkout@v6
      - name: Determine ref name
        id: ref
        run: |
          echo "name=${GITHUB_HEAD_REF:-$GITHUB_REF_NAME}" >> $GITHUB_OUTPUT
      - name: Check external registry push
        id: push-external
        env:
          REF_NAME: ${{ steps.ref.outputs.name }}
        run: |
          # If we cannot push (e.g. fork PR), explicitly disable external push and exit
          if [[ "$CAN_PUSH" != "true" ]]; then
            echo "enable=false" >> $GITHUB_OUTPUT
            exit 0
          fi

          # Only push to Docker Hub / Quay from main repo on specific branches/tags
          if [[ "${{ github.repository_owner }}" == "paperless-ngx" ]]; then
            case "$REF_NAME" in
              dev|beta)
                echo "enable=true" >> $GITHUB_OUTPUT
                exit 0
                ;;
            esac
            case "$GITHUB_REF" in
              refs/tags/v*|*beta.rc*)
                echo "enable=true" >> $GITHUB_OUTPUT
                exit 0
                ;;
            esac
          fi
          echo "enable=false" >> $GITHUB_OUTPUT
      - name: Docker metadata
        id: docker-meta
        uses: docker/metadata-action@v5
        with:
          images: |
            ghcr.io/${{ github.repository }}
            name=paperlessngx/paperless-ngx,enable=${{ steps.push-external.outputs.enable }}
            name=quay.io/paperlessngx/paperless-ngx,enable=${{ steps.push-external.outputs.enable }}
          tags: |
            type=ref,event=branch
            type=raw,value=${{ steps.ref.outputs.name }},enable=${{ github.event_name == 'pull_request' }}
            type=semver,pattern={{version}}
            type=semver,pattern={{major}}.{{minor}}
      - name: Set up Docker Buildx
        uses: docker/setup-buildx-action@v3
      - name: Set up QEMU
        uses: docker/setup-qemu-action@v3
        with:
          platforms: arm64
      - name: Login to GitHub Container Registry
        uses: docker/login-action@v3
        with:
          registry: ghcr.io
          username: ${{ github.actor }}
          password: ${{ secrets.GITHUB_TOKEN }}
      - name: Login to Docker Hub
        if: steps.push-external.outputs.enable == 'true'
        uses: docker/login-action@v3
        with:
          username: ${{ secrets.DOCKERHUB_USERNAME }}
          password: ${{ secrets.DOCKERHUB_TOKEN }}
      - name: Login to Quay.io
        if: steps.push-external.outputs.enable == 'true'
        uses: docker/login-action@v3
        with:
          registry: quay.io
          username: ${{ secrets.QUAY_USERNAME }}
          password: ${{ secrets.QUAY_ROBOT_TOKEN }}
      - name: Build and push
        uses: docker/build-push-action@v6
        with:
          context: .
          file: ./Dockerfile
          platforms: linux/amd64,linux/arm64
          push: ${{ env.CAN_PUSH == 'true' }}
          tags: ${{ steps.docker-meta.outputs.tags }}
          labels: ${{ steps.docker-meta.outputs.labels }}
          build-args: |
            PNGX_TAG_VERSION=${{ steps.docker-meta.outputs.version }}
          cache-from: |
            type=registry,ref=ghcr.io/${{ github.repository }}/cache/app:${{ steps.ref.outputs.name }}
            type=registry,ref=ghcr.io/${{ github.repository }}/cache/app:dev
          cache-to: ${{ env.CAN_PUSH == 'true' && format('type=registry,mode=max,ref=ghcr.io/{0}/cache/app:{1}', github.repository, steps.ref.outputs.name) || '' }}
      - name: Inspect image
        if: env.CAN_PUSH == 'true'
        run: |
          docker buildx imagetools inspect ${{ fromJSON(steps.docker-meta.outputs.json).tags[0] }}