publish-ghcr.yml

name: Publish Docker image to GHCR

on:
  push:
    branches: ["main"]
    tags:
      - 'v*'
  workflow_dispatch: {}

permissions:
  contents: read
  packages: write

jobs:
  build-and-push:
    name: Build and publish image
    runs-on: ubuntu-latest

    steps:
      - name: Checkout
        uses: actions/checkout@v4

      - name: Set up QEMU
        uses: docker/setup-qemu-action@v2

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

      - name: Login to GHCR
        uses: docker/login-action@v2
        with:
          registry: ghcr.io
          username: ${{ github.actor }}
          password: ${{ secrets.GITHUB_TOKEN }}

      - name: Determine image name and tags
        id: meta
        run: |
          IMAGE_OWNER=$(echo "${{ github.repository_owner }}" | tr '[:upper:]' '[:lower:]')
          IMAGE="ghcr.io/${IMAGE_OWNER}/filmaffinity-scores"
          # build-push-action requires newline-separated tags
          TAGS="${IMAGE}:latest
          ${IMAGE}:${{ github.sha }}"
          if [[ "${GITHUB_REF}" == refs/tags/* ]]; then
            TAG_NAME=${GITHUB_REF#refs/tags/}
            TAGS="${TAGS}
          ${IMAGE}:${TAG_NAME}"
          fi
          echo "image=${IMAGE}" >> "$GITHUB_OUTPUT"
          {
            echo "tags<<EOF"
            echo "${TAGS}"
            echo "EOF"
          } >> "$GITHUB_OUTPUT"

      - name: Build and push
        uses: docker/build-push-action@v4
        with:
          context: .
          push: true
          platforms: linux/amd64,linux/arm64
          tags: ${{ steps.meta.outputs.tags }}