name: Docker Build and Publish
on:
  workflow_call:
  workflow_dispatch:

env:
  REGISTRY: ghcr.io
  IMAGE_NAME: ${{ github.repository }}

jobs:
  build-and-push:
    runs-on: ubuntu-latest
    permissions:
      contents: read
      packages: write
      attestations: write
      id-token: write

    steps:
      - name: Checkout repository
        uses: actions/checkout@9c091bb21b7c1c1d1991bb908d89e4e9dddfe3e0 # v7.0.0

      - name: Set up Docker Buildx
        uses: docker/setup-buildx-action@bb05f3f5519dd87d3ba754cc423b652a5edd6d2c # v4

      - name: Log in to Container Registry
        if: github.event_name != 'pull_request'
        uses: docker/login-action@af1e73f918a031802d376d3c8bbc3fe56130a9b0 # v4
        with:
          registry: ${{ env.REGISTRY }}
          username: ${{ github.actor }}
          password: ${{ secrets.GITHUB_TOKEN }}

      - name: Extract metadata
        id: meta
        uses: docker/metadata-action@dc802804100637a589fabce1cb79ff13a1411302 # v6
        with:
          images: ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}
          tags: |
            type=ref,event=branch
            type=ref,event=pr
            type=semver,pattern={{version}}
            type=semver,pattern={{major}}.{{minor}}
            type=semver,pattern={{major}}
            type=raw,value=latest,enable={{is_default_branch}}

      - name: Build and push Docker image
        id: build-and-push
        uses: docker/build-push-action@53b7df96c91f9c12dcc8a07bcb9ccacbed38856a # v7
        with:
          context: .
          platforms: linux/amd64,linux/arm64
          push: ${{ github.event_name != 'pull_request' }}
          tags: ${{ steps.meta.outputs.tags }}
          labels: ${{ steps.meta.outputs.labels }}
          # Enable Kubernetes pod/container attribution in the container image.
          # It is dependency-free and runtime-gated (`--kubernetes auto`, the
          # default, is inert outside a pod), so a single image serves both
          # general container use and kubectl-rustnet. Native installs
          # (cargo/brew/deb/rpm) leave the feature off and stay lean.
          build-args: |
            CARGO_FEATURES=kubernetes
          cache-from: type=gha
          cache-to: type=gha,mode=max

      - name: Generate artifact attestation
        if: github.event_name != 'pull_request'
        uses: actions/attest-build-provenance@0f67c3f4856b2e3261c31976d6725780e5e4c373 # v4
        with:
          subject-name: ${{ env.REGISTRY }}/${{ env.IMAGE_NAME}}
          subject-digest: ${{ steps.build-and-push.outputs.digest }}
          push-to-registry: true