name: Publish Docker image

on:
  push:
    branches: [main, master]
    tags: ['v*']

permissions:
  contents: read
  packages: write

jobs:
  build-and-push:
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v4

      - uses: docker/setup-buildx-action@v3

      - name: Compute lowercase image name
        run: echo "IMAGE_NAME=$(echo '${{ github.repository }}' | tr '[:upper:]' '[:lower:]')" >> "$GITHUB_ENV"

      - name: Log in to Gitea container registry
        uses: docker/login-action@v3
        with:
          registry: ${{ vars.REGISTRY_HOST }}
          username: ${{ github.actor }}
          password: ${{ secrets.REGISTRY_TOKEN }}

      - name: Log in to GHCR
        uses: docker/login-action@v3
        with:
          registry: ghcr.io
          username: ${{ github.actor }}
          password: ${{ secrets.GHCR_TOKEN }}

      - name: Build and push
        uses: docker/build-push-action@v6
        with:
          context: .
          push: true
          tags: |
            ${{ vars.REGISTRY_HOST }}/${{ env.IMAGE_NAME }}:latest
            ${{ vars.REGISTRY_HOST }}/${{ env.IMAGE_NAME }}:${{ github.sha }}
            ghcr.io/${{ env.IMAGE_NAME }}:latest
            ghcr.io/${{ env.IMAGE_NAME }}:${{ github.sha }}