name: Build and Push Docker Image

on:
  push:
    branches: [main]
    tags: ['v*.*.*']

env:
  REGISTRY: ghcr.io
  IMAGE_NAME: erp-mafia/gnubok

jobs:
  build-and-push:
    runs-on: ubuntu-latest
    permissions:
      contents: read
      packages: write
      # OIDC token used by cosign keyless signing.
      id-token: write
      # SARIF upload to the repo's "Security" tab from the Trivy scan.
      security-events: write

    steps:
      - uses: actions/checkout@v6

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

      - name: Extract metadata
        id: meta
        uses: docker/metadata-action@v5
        with:
          images: ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}
          # On main: push `latest` + commit-sha tags.
          # On v*.*.* tags: push semver tags (1.2.3, 1.2, 1) for production pinning.
          tags: |
            type=raw,value=latest,enable={{is_default_branch}}
            type=sha,prefix=
            type=semver,pattern={{version}}
            type=semver,pattern={{major}}.{{minor}}
            type=semver,pattern={{major}}

      - name: Set up QEMU
        uses: docker/setup-qemu-action@v4

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

      - name: Build and push
        id: build
        uses: docker/build-push-action@v7
        with:
          context: .
          platforms: linux/amd64,linux/arm64
          push: true
          tags: ${{ steps.meta.outputs.tags }}
          labels: ${{ steps.meta.outputs.labels }}
          build-args: |
            EXTENSIONS_PRESET=self-hosted
          # SBOM (software bill of materials) + SLSA provenance are attached as
          # OCI attestations, queryable via `docker buildx imagetools inspect`.
          provenance: mode=max
          sbom: true
          # Per-branch cache scope so a PR branch can't poison main's cache
          # layers. Fall back to main's cache on first build of a new branch.
          cache-from: |
            type=gha,scope=${{ github.ref_name }}
            type=gha,scope=main
          cache-to: type=gha,scope=${{ github.ref_name }},mode=max

      - name: Install cosign
        uses: sigstore/cosign-installer@v3.7.0

      - name: Sign the image (keyless OIDC)
        env:
          DIGEST: ${{ steps.build.outputs.digest }}
        run: |
          cosign sign --yes "${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}@${DIGEST}"

      - name: Scan image with Trivy
        id: trivy
        uses: aquasecurity/trivy-action@0.30.0
        with:
          image-ref: ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}@${{ steps.build.outputs.digest }}
          # HIGH is blocking for an accounting application — Trivy's CRITICAL
          # bucket is narrow (mostly RCE-class), and HIGH covers everything
          # from auth bypass to crypto downgrades. ignore-unfixed keeps the
          # gate actionable: only CVEs we can patch by rebuilding fail the
          # pipeline, not upstream-pending issues we have no remediation for.
          severity: CRITICAL,HIGH
          exit-code: '1'
          ignore-unfixed: true
          format: sarif
          output: trivy-results.sarif

      - name: Upload Trivy results to GitHub Security tab
        # if:always() so a CRITICAL finding still ends up in the Security tab
        # even though the Trivy step above failed the workflow.
        if: always()
        uses: github/codeql-action/upload-sarif@v3
        with:
          sarif_file: trivy-results.sarif
          category: trivy