name: Create and publish Docker images with specific build args

on:
  workflow_dispatch:
  push:
    branches:
      - main
      - dev
    tags:
      - v*

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

env:
  REGISTRY: ghcr.io

jobs:
  build:
    runs-on: ${{ matrix.platform.runner }}
    permissions:
      contents: read
      packages: write
    strategy:
      fail-fast: false
      matrix:
        platform:
          - arch: linux/amd64
            runner: ubuntu-latest
          - arch: linux/arm64
            runner: ubuntu-24.04-arm
        variant:
          - name: main
            suffix: ""
            build_args: ""
            free_disk: false
          - name: cuda
            suffix: "-cuda"
            build_args: "USE_CUDA=true"
            free_disk: true
          - name: cuda126
            suffix: "-cuda126"
            build_args: |
              USE_CUDA=true
              USE_CUDA_VER=cu126
            free_disk: true
          - name: ollama
            suffix: "-ollama"
            build_args: "USE_OLLAMA=true"
            free_disk: false
          - name: slim
            suffix: "-slim"
            build_args: "USE_SLIM=true"
            free_disk: false

    steps:
      - name: Prepare environment
        run: |
          echo "IMAGE_NAME=${GITHUB_REPOSITORY,,}" >> ${GITHUB_ENV}
          echo "FULL_IMAGE_NAME=${REGISTRY}/${GITHUB_REPOSITORY,,}" >> ${GITHUB_ENV}
          platform=${{ matrix.platform.arch }}
          echo "PLATFORM_PAIR=${platform//\//-}" >> ${GITHUB_ENV}

      - name: Free disk space
        if: matrix.variant.free_disk
        run: rm -rf /opt/hostedtoolcache

      - name: Checkout repository
        uses: actions/checkout@v5

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

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

      - name: Log in to the Container registry
        uses: docker/login-action@v3
        with:
          registry: ${{ env.REGISTRY }}
          username: ${{ github.actor }}
          password: ${{ secrets.GITHUB_TOKEN }}

      - name: Extract metadata for Docker images
        id: meta
        uses: docker/metadata-action@v5
        with:
          images: ${{ env.FULL_IMAGE_NAME }}
          tags: |
            type=ref,event=branch
            type=ref,event=tag
            type=sha,prefix=git-
            type=semver,pattern={{version}}
            type=semver,pattern={{major}}.{{minor}}
            ${{ matrix.variant.suffix != '' && format('type=raw,enable={0},prefix=,suffix=,value={1}', github.ref == 'refs/heads/main', matrix.variant.name) || '' }}
          flavor: |
            latest=${{ github.ref == 'refs/heads/main' }}
            ${{ matrix.variant.suffix != '' && format('suffix={0},onlatest=true', matrix.variant.suffix) || '' }}

      - name: Extract metadata for Docker cache
        id: cache-meta
        uses: docker/metadata-action@v5
        with:
          images: ${{ env.FULL_IMAGE_NAME }}
          tags: |
            type=ref,event=branch
            ${{ github.ref_type == 'tag' && 'type=raw,value=main' || '' }}
          flavor: |
            prefix=cache-${{ matrix.variant.name }}-${{ matrix.platform.arch }}-
            latest=false

      - name: Build Docker image
        uses: docker/build-push-action@v5
        id: build
        with:
          context: .
          push: true
          platforms: ${{ matrix.platform.arch }}
          labels: ${{ steps.meta.outputs.labels }}
          outputs: type=image,name=${{ env.FULL_IMAGE_NAME }},push-by-digest=true,name-canonical=true,push=true
          cache-from: type=registry,ref=${{ steps.cache-meta.outputs.tags }}
          cache-to: type=registry,ref=${{ steps.cache-meta.outputs.tags }},mode=max
          sbom: true
          build-args: |
            BUILD_HASH=${{ github.sha }}
            ${{ matrix.variant.build_args }}

      - name: Export digest
        run: |
          mkdir -p /tmp/digests
          digest="${{ steps.build.outputs.digest }}"
          touch "/tmp/digests/${digest#sha256:}"

      - name: Upload digest
        uses: actions/upload-artifact@v4
        with:
          name: digests-${{ matrix.variant.name }}-${{ env.PLATFORM_PAIR }}
          path: /tmp/digests/*
          if-no-files-found: error
          retention-days: 1

  merge:
    runs-on: ubuntu-latest
    needs: [build]
    permissions:
      contents: read
      packages: write
    strategy:
      fail-fast: false
      matrix:
        variant:
          - name: main
            suffix: ""
          - name: cuda
            suffix: "-cuda"
          - name: cuda126
            suffix: "-cuda126"
          - name: ollama
            suffix: "-ollama"
          - name: slim
            suffix: "-slim"

    steps:
      - name: Prepare environment
        run: |
          echo "IMAGE_NAME=${GITHUB_REPOSITORY,,}" >> ${GITHUB_ENV}
          echo "FULL_IMAGE_NAME=${REGISTRY}/${GITHUB_REPOSITORY,,}" >> ${GITHUB_ENV}

      - name: Download digests
        uses: actions/download-artifact@v5
        with:
          pattern: digests-${{ matrix.variant.name }}-*
          path: /tmp/digests
          merge-multiple: true

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

      - name: Log in to the Container registry
        uses: docker/login-action@v3
        with:
          registry: ${{ env.REGISTRY }}
          username: ${{ github.actor }}
          password: ${{ secrets.GITHUB_TOKEN }}

      - name: Extract metadata for Docker images
        id: meta
        uses: docker/metadata-action@v5
        with:
          images: ${{ env.FULL_IMAGE_NAME }}
          tags: |
            type=ref,event=branch
            type=ref,event=tag
            type=sha,prefix=git-
            type=semver,pattern={{version}}
            type=semver,pattern={{major}}.{{minor}}
            ${{ matrix.variant.suffix != '' && format('type=raw,enable={0},prefix=,suffix=,value={1}', github.ref == 'refs/heads/main', matrix.variant.name) || '' }}
          flavor: |
            latest=${{ github.ref == 'refs/heads/main' }}
            ${{ matrix.variant.suffix != '' && format('suffix={0},onlatest=true', matrix.variant.suffix) || '' }}

      - name: Create manifest list and push
        working-directory: /tmp/digests
        run: |
          docker buildx imagetools create \
            $(jq -cr '.tags | map("-t " + .) | join(" ")' <<< "$DOCKER_METADATA_OUTPUT_JSON") \
            $(printf '${{ env.FULL_IMAGE_NAME }}@sha256:%s ' *)

      - name: Inspect image
        run: |
          docker buildx imagetools inspect ${{ env.FULL_IMAGE_NAME }}:${{ steps.meta.outputs.version }}

  copy-to-dockerhub:
    runs-on: ubuntu-latest
    if: github.ref == 'refs/heads/main' || startsWith(github.ref, 'refs/tags/v')
    needs: [merge]
    continue-on-error: true
    strategy:
      fail-fast: false
      matrix:
        include:
          - variant: main
            suffix: ""
          - variant: cuda
            suffix: "-cuda"
          - variant: cuda126
            suffix: "-cuda126"
          - variant: ollama
            suffix: "-ollama"
          - variant: slim
            suffix: "-slim"

    steps:
      - name: Prepare environment
        run: |
          echo "IMAGE_NAME=${GITHUB_REPOSITORY,,}" >> ${GITHUB_ENV}
          echo "FULL_IMAGE_NAME=${REGISTRY}/${GITHUB_REPOSITORY,,}" >> ${GITHUB_ENV}

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

      - name: Log in to the Container registry
        uses: docker/login-action@v3
        with:
          registry: ${{ env.REGISTRY }}
          username: ${{ github.actor }}
          password: ${{ secrets.GITHUB_TOKEN }}

      - name: Log in to Docker Hub
        uses: docker/login-action@v3
        with:
          username: ${{ secrets.DOCKERHUB_USERNAME }}
          password: ${{ secrets.DOCKERHUB_TOKEN }}

      - name: Determine source and destination tags
        id: tags
        run: |
          DOCKERHUB_IMAGE="openwebui/open-webui"
          SUFFIX="${{ matrix.suffix }}"

          if [[ "${{ github.ref }}" == refs/tags/v* ]]; then
            VERSION="${{ github.ref_name }}"
            VERSION="${VERSION#v}"
            MAJOR_MINOR="${VERSION%.*}"

            echo "tags<<EOF" >> $GITHUB_OUTPUT
            echo "${VERSION}${SUFFIX}" >> $GITHUB_OUTPUT
            echo "${MAJOR_MINOR}${SUFFIX}" >> $GITHUB_OUTPUT
            echo "EOF" >> $GITHUB_OUTPUT
          else
            if [ -z "$SUFFIX" ]; then
              echo "tags=latest" >> $GITHUB_OUTPUT
            else
              VARIANT_NAME="${SUFFIX#-}"
              echo "tags<<EOF" >> $GITHUB_OUTPUT
              echo "latest${SUFFIX}" >> $GITHUB_OUTPUT
              echo "${VARIANT_NAME}" >> $GITHUB_OUTPUT
              echo "EOF" >> $GITHUB_OUTPUT
            fi
          fi

          echo "dockerhub_image=${DOCKERHUB_IMAGE}" >> $GITHUB_OUTPUT

      - name: Copy images from GHCR to Docker Hub
        run: |
          DOCKERHUB_IMAGE="${{ steps.tags.outputs.dockerhub_image }}"
          SUFFIX="${{ matrix.suffix }}"

          if [[ "${{ github.ref }}" == refs/tags/v* ]]; then
            VERSION="${{ github.ref_name }}"
            VERSION="${VERSION#v}"
            SOURCE_TAG="${VERSION}${SUFFIX}"
          else
            if [ -z "$SUFFIX" ]; then
              SOURCE_TAG="latest"
            else
              SOURCE_TAG="latest${SUFFIX}"
            fi
          fi

          SOURCE="${{ env.FULL_IMAGE_NAME }}:${SOURCE_TAG}"

          echo "Copying from ${SOURCE} to Docker Hub..."

          while IFS= read -r TAG; do
            [ -z "$TAG" ] && continue
            DEST="${DOCKERHUB_IMAGE}:${TAG}"
            echo "  -> ${DEST}"
            docker buildx imagetools create -t "${DEST}" "${SOURCE}"
          done <<< "${{ steps.tags.outputs.tags }}"