name: Build and Publish

on:
  push:
    branches: [main]
    tags: ["v*"]

env:
  REGISTRY: git.atlashorizon.net
  IMAGE_NAME: ${{ github.repository }}

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

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

      # ACTION_TOKEN is a personal access token with package read/write scope,
      # stored as a runner secret (the automatic GITEA_TOKEN doesn't work for
      # registry auth on this instance).
      - name: Log in to Gitea container registry
        uses: docker/login-action@v3
        with:
          registry: ${{ env.REGISTRY }}
          username: ${{ github.repository_owner }}
          password: ${{ secrets.ACTION_TOKEN }}

      - name: Extract image metadata
        id: meta
        uses: docker/metadata-action@v5
        with:
          images: ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}
          tags: |
            type=raw,value=latest,enable={{is_default_branch}}
            type=semver,pattern={{version}}
            type=sha
          labels: |
            org.opencontainers.image.source=${{ github.server_url }}/${{ github.repository }}

      - name: Build and push image
        uses: docker/build-push-action@v6
        with:
          context: .
          push: true
          tags: ${{ steps.meta.outputs.tags }}
          labels: ${{ steps.meta.outputs.labels }}

      # Links the container package to this repository so it shows up on the
      # repo's Packages tab. Returns an error if it's already linked, which is
      # fine — hence the fallback message instead of failing the job.
      - name: Link package to repository
        run: |
          curl -sf -X POST \
            -H "Authorization: token ${{ secrets.ACTION_TOKEN }}" \
            "${{ github.server_url }}/api/v1/packages/${{ github.repository_owner }}/container/${{ github.event.repository.name }}/-/link/${{ github.event.repository.name }}" \
            && echo "Package linked to repository" \
            || echo "Link skipped (already linked, or token lacks permission)"