name: CI Build Multiarch + Trivy

on:
  push:
    # tags:
    #   - "v*"
    branches:
      - "main"
    paths:
        - "Dockerfile"
        - .github/workflows/multi-build.yaml
  workflow_dispatch:
    inputs:
      manual-tag:
        description: 'Manual Tag'
        required: false
        default: 'main'
        type: string
      ghost_version:
        description: 'Ghost version'
        required: false
        default: '5.81.1'
        type: string

permissions: write-all

env:
  GHCR_IMAGE: ghcr.io/${{ github.repository }}
  DOCKER_IMAGE: docker.io/${{ vars.DOCKER_USER }}/${{ github.event.repository.name }}


jobs:
  build:
    runs-on: ubuntu-22.04
    strategy:
      fail-fast: true
      matrix:
        platform:
          - linux/arm64
          - linux/amd64
    steps:
      - name: Harden Runner
        uses: step-security/harden-runner@a4aa98b93cab29d9b1101a6143fb8bce00e2eac4 # v2.7.1
        with:
          egress-policy: audit

      -
        name: Prepare
        run: |
          platform=${{ matrix.platform }}
          echo "PLATFORM_PAIR=${platform//\//-}" >> $GITHUB_ENV
      -
        name: Checkout
        uses: actions/checkout@0ad4b8fadaa221de15dcec353f45205ec38ea70b # v4.1.4
      -
        name: Set up GHOST_VERSION and MANUAL_TAG values, depending on event type (push or workflow_dispatch)
        id: versions
        env:
          GITHUB_EVENT_NAME: ${{ github.event_name }}
        run: |
          if [ ${{ env.GITHUB_EVENT_NAME }} == workflow_dispatch ]; then
            echo "GHOST_VERSION=${{ github.event.inputs.ghost_version }}" >> $GITHUB_OUTPUT
            echo "MANUAL_TAG=${{ github.event.inputs.manual-tag }}" >> $GITHUB_OUTPUT
            echo "GHOST_VERSION=${{ github.event.inputs.ghost_version }}" >> $GITHUB_ENV
            echo "MANUAL_TAG=${{ github.event.inputs.manual-tag }}" >> $GITHUB_ENV
          else
            echo "GHOST_VERSION=$(curl -s https://api.github.com/repos/tryghost/ghost/releases/latest | jq '.name' | sed 's/\"//g')" >> $GITHUB_OUTPUT
          fi

      -
        name: Show Ghost version
        run: |
              echo "GHOST_VERSION=${{ steps.versions.outputs.GHOST_VERSION }}"
              echo "MANUAL_TAG=${{ steps.versions.outputs.MANUAL_TAG }}" 

      - name: Docker meta default
        id: meta
        uses: docker/metadata-action@8e5442c4ef9f78752691e2d8f8d19755c6f78e81 # v5.5.1
        continue-on-error: true
        with:
          images: ${{ env.GHCR_IMAGE }}
          labels: | # Add description label for opencontainers specs to the $DOCKER_METADATA_OUTPUT_JSON variable.
            org.opencontainers.image.description: "${{ github.event.repository.description }}"

          # tags: |
          #   type=raw,value=latest,enable=${{ github.event_name == 'push' || github.ref == 'refs/heads/main' || github.event.ref == 'tags/v*' }}
          #   type=raw,value=main,enable=${{ github.event_name == 'push' || github.ref == 'refs/heads/main' || github.event.ref == 'tags/v*' }}
          #   type=raw,value=${{ steps.versions.outputs.MANUAL_TAG }},enable=${{ github.event_name == 'workflow_dispatch' }}
          #   type=raw,value=v${{ steps.versions.outputs.GHOST_VERSION }},enable=${{ github.event_name == 'workflow_dispatch' }}

      -
        name: Set up QEMU
        uses: docker/setup-qemu-action@68827325e0b33c7199eb31dd4e31fbe9023e06e3 # v3.0.0
        with:
          platforms: amd64,arm64
      
      -
        name: Set up Docker Buildx
        uses: docker/setup-buildx-action@d70bba72b1f3fd22344832f00baa16ece964efeb # v3.3.0
        with:
          driver-opts: |
            network=host

      -
        name: Login to GitHub Container Registry
        uses: docker/login-action@e92390c5fb421da1463c202d546fed0ec5c39f20 # v3.1.0
        with:
          registry: ghcr.io
          username: ${{ github.actor }}
          password: ${{ secrets.GITHUB_TOKEN }}
      -
        name: Build and push by digest
        id: build
        uses: docker/build-push-action@2cdde995de11925a030ce8070c3d77a52ffcf1c0 # v5.3.0
        with:
          context: .
          platforms: ${{ matrix.platform }}
          labels: ${{ steps.meta.outputs.labels }}
          build-args: GHOST_VERSION=${{ steps.versions.outputs.GHOST_VERSION }} 
          outputs: type=image,name=${{ env.GHCR_IMAGE }},push-by-digest=true,name-canonical=true,push=true
          provenance: false
          cache-from: type=gha
          cache-to: type=gha,mode=max
      -
        name: Export digest
        run: |
          mkdir -p /tmp/digests
          digest="${{ steps.build.outputs.digest }}"
          touch "/tmp/digests/${digest#sha256:}"
      -
        name: Upload digest
        uses: actions/upload-artifact@65462800fd760344b1a7b4382951275a0abb4808 # v4.3.3
        with:
          name: digests-${{ env.PLATFORM_PAIR }}
          path: /tmp/digests/*
          if-no-files-found: error
          retention-days: 1

  merge:
    runs-on: ubuntu-22.04
    needs:
      - build
    steps:
      - name: Harden Runner
        uses: step-security/harden-runner@a4aa98b93cab29d9b1101a6143fb8bce00e2eac4 # v2.7.1
        with:
          egress-policy: audit

      -
        name: Download digests
        uses: actions/download-artifact@65a9edc5881444af0b9093a5e628f2fe47ea3b2e # v4.1.7
        with:
          path: /tmp/digests
          pattern: digests-*
          merge-multiple: true
      -
        name: Set up Docker Buildx
        uses: docker/setup-buildx-action@d70bba72b1f3fd22344832f00baa16ece964efeb # v3.3.0
        with:
          driver-opts: |
            network=host
      -
        name: Docker meta
        id: meta
        uses: docker/metadata-action@8e5442c4ef9f78752691e2d8f8d19755c6f78e81 # v5.5.1
        with:
          images: ${{ env.GHCR_IMAGE }}
          tags: |
            type=raw,value=latest,enable=${{ github.event_name == 'push' || github.ref == 'refs/heads/main' || github.event.ref == 'tags/v*' }}
            type=raw,value=main,enable=${{ github.event_name == 'push' || github.ref == 'refs/heads/main' || github.event.ref == 'tags/v*' }}
            type=raw,value=${{ github.env.MANUAL_TAG }},enable=${{ github.event_name == 'workflow_dispatch' }}
            type=raw,value=v${{ github.env.GHOST_VERSION }},enable=${{ github.event_name == 'workflow_dispatch' }}
      -
        name: Login to GitHub Container Registry
        uses: docker/login-action@e92390c5fb421da1463c202d546fed0ec5c39f20 # v3.1.0
        with:
          registry: ghcr.io
          username: ${{ github.actor }}
          password: ${{ secrets.GITHUB_TOKEN }}
      -
        name: Create manifest list and pushs
        working-directory: /tmp/digests
        id: manifest
        run: |
          docker buildx imagetools create $(jq -cr '.tags | map("-t " + .) | join(" ")' <<< "$DOCKER_METADATA_OUTPUT_JSON") \
            $(printf '${{ env.GHCR_IMAGE }}@sha256:%s ' *)
      -
        name: Inspect image
        id: inspect
        run: |
          docker buildx imagetools inspect ${{ env.GHCR_IMAGE }}:${{ steps.meta.outputs.version }}


      - name: Run Trivy vulnerability scanner
        uses: aquasecurity/trivy-action@7088d18dcb87884bc7b5a4000d5517d758e9aa13 # master
        continue-on-error: true
        with:
          image-ref: '${{ env.GHCR_IMAGE }}:${{ steps.meta.outputs.version }}'
          format: 'sarif'
          output: 'trivy-results.sarif'
          scan-type: 'image'
          github-pat: '${{ github.token }}'
          ignore-unfixed: true
          severity: 'CRITICAL,HIGH'


      - name: Upload Trivy scan results to GitHub Security tab
        uses: github/codeql-action/upload-sarif@41857bab356c91c1decab862427445155c08ca39 # main
        continue-on-error: true
        with:
          sarif_file: 'trivy-results.sarif'
          

      -
        name: Login to Docker Hub
        uses: docker/login-action@e92390c5fb421da1463c202d546fed0ec5c39f20 # v3.1.0
        continue-on-error: true
        with:
          username: ${{ secrets.DOCKER_USER }}
          password: ${{ secrets.DOCKER_PASS }}

      -
        name: Push to Docker Hub
        continue-on-error: true
        run: |
          docker buildx imagetools create \
            --tag ${{ env.DOCKER_IMAGE }}:${{ steps.meta.outputs.version }} \
            ${{ env.GHCR_IMAGE }}:${{ steps.meta.outputs.version }}