name: Manual relay image
run-name: Manual relay image · ${{ inputs.source_ref }}

# Operator-only publishing. This deliberately does not qualify the source via CI.
# Publish manual-* tags only; normal release publishing remains in docker.yml.
on:
  workflow_dispatch:
    inputs:
      source_ref:
        description: block/buzz branch, tag, or full SHA reachable from a repository branch
        required: true
        type: string

permissions: {}

env:
  IMAGE_NAME: ${{ vars.GHCR_IMAGE != '' && vars.GHCR_IMAGE || 'ghcr.io/block/buzz' }}

jobs:
  resolve:
    name: Resolve the selected source
    runs-on: ubuntu-24.04
    timeout-minutes: 5
    permissions:
      contents: read
    outputs:
      sha: ${{ steps.source.outputs.sha }}
      tag: ${{ steps.source.outputs.tag }}
    steps:
      - name: Require block/buzz repository
        env:
          REPOSITORY: ${{ github.repository }}
        shell: bash
        run: |
          set -euo pipefail
          [[ "$REPOSITORY" == block/buzz ]] || {
            echo '::error::Run this workflow in block/buzz; use source_ref to select repository code.'
            exit 1
          }
      - name: Resolve a source reachable from a repository branch
        id: source
        env:
          SOURCE_REF: ${{ inputs.source_ref }}
        shell: bash
        run: |
          set -euo pipefail
          if [[ -z "$SOURCE_REF" || ${#SOURCE_REF} -gt 255 || ! "$SOURCE_REF" =~ ^[A-Za-z0-9._/@-]+$ ]]; then
            echo '::error::Supply a repository branch, tag, or full commit SHA.'
            exit 1
          fi
          case "$SOURCE_REF" in
            -*|*..*|*.lock|refs/pull/*|pull/*|*/pull/*)
              echo '::error::PR refs and malformed refs are not allowed.'
              exit 1
              ;;
          esac
          workdir=$(mktemp -d)
          trap 'rm -rf "$workdir"' EXIT
          git -C "$workdir" init --quiet
          git -C "$workdir" remote add origin https://github.com/block/buzz.git
          # Fetch only canonical branch histories, never refs/pull or arbitrary SHAs.
          # Full history is needed to prove ancestry; blobs are fetched only by build jobs.
          git -C "$workdir" fetch --filter=blob:none --no-tags origin \
            '+refs/heads/*:refs/remotes/origin/*'
          if [[ "$SOURCE_REF" =~ ^[0-9a-fA-F]{40}$ ]]; then
            sha=$(git -C "$workdir" rev-parse --verify "${SOURCE_REF}^{commit}")
          elif [[ "$SOURCE_REF" == refs/heads/* ]]; then
            sha=$(git -C "$workdir" rev-parse --verify "refs/remotes/origin/${SOURCE_REF#refs/heads/}^{commit}")
          else
            tag_ref="$SOURCE_REF"
            if [[ "$SOURCE_REF" != refs/* ]] && \
              sha=$(git -C "$workdir" rev-parse --verify "refs/remotes/origin/${SOURCE_REF}^{commit}" 2>/dev/null); then
              :
            else
              if [[ "$SOURCE_REF" != refs/* ]]; then
                tag_ref="refs/tags/$SOURCE_REF"
              fi
              [[ "$tag_ref" == refs/tags/* ]] || {
                echo '::error::Only repository branches and tags are allowed.'
                exit 1
              }
              git -C "$workdir" fetch --no-tags origin "$tag_ref:refs/tags/manual-source"
              sha=$(git -C "$workdir" rev-parse --verify 'refs/tags/manual-source^{commit}')
            fi
          fi
          [[ "$sha" =~ ^[0-9a-f]{40}$ ]]
          branches=$(git -C "$workdir" for-each-ref --format='%(refname)' --contains="$sha" refs/remotes/origin/)
          [[ -n "$branches" ]] || {
            echo '::error::Selected commit must be reachable from a block/buzz branch; PR-only commits are not allowed.'
            exit 1
          }
          echo "sha=$sha" >> "$GITHUB_OUTPUT"
          echo "tag=manual-${sha:0:12}-${GITHUB_RUN_ID}-${GITHUB_RUN_ATTEMPT}" >> "$GITHUB_OUTPUT"
          echo "Selected source: $sha. CI qualification is skipped."

  build:
    name: Build (${{ matrix.platform }})
    needs: resolve
    runs-on: ${{ matrix.runner }}
    timeout-minutes: 90
    permissions:
      contents: read
      packages: write
    strategy:
      fail-fast: false
      matrix:
        include:
          - platform: linux/amd64
            runner: ubuntu-24.04
            arch: amd64
          - platform: linux/arm64
            runner: ubuntu-24.04-arm
            arch: arm64
    steps:
      - uses: actions/checkout@df4cb1c069e1874edd31b4311f1884172cec0e10 # v6.0.3
        with:
          ref: ${{ needs.resolve.outputs.sha }}
          persist-credentials: false
      - uses: docker/setup-buildx-action@d7f5e7f509e45cec5c76c4d5afdd7de93d0b3df5 # v4.1.0
        with:
          buildkitd-config-inline: |
            [worker.oci]
              max-parallelism = 2
      - uses: docker/login-action@650006c6eb7dba73a995cc03b0b2d7f5ca915bee # v4.2.0
        with:
          registry: ghcr.io
          username: ${{ github.actor }}
          password: ${{ secrets.GITHUB_TOKEN }}
      - name: Build and push the runtime by digest
        id: build
        uses: docker/build-push-action@f9f3042f7e2789586610d6e8b85c8f03e5195baf # v7.2.0
        with:
          context: .
          file: ./Dockerfile
          target: runtime
          platforms: ${{ matrix.platform }}
          build-args: |
            BUZZ_SOURCE_SHA=${{ needs.resolve.outputs.sha }}
            BUZZ_BUILD_ID=manual-actions:${{ github.run_id }}:${{ github.run_attempt }}
            BUZZ_BUILD_URL=https://github.com/${{ github.repository }}/actions/runs/${{ github.run_id }}/attempts/${{ github.run_attempt }}
          labels: |
            org.opencontainers.image.source=https://github.com/${{ github.repository }}
            org.opencontainers.image.revision=${{ needs.resolve.outputs.sha }}
            xyz.buzz.manual-build=true
          outputs: type=image,name=${{ env.IMAGE_NAME }},push-by-digest=true,name-canonical=true,push=true
          cache-from: |
            type=registry,ref=${{ env.IMAGE_NAME }}-buildcache:${{ matrix.arch }}
            type=registry,ref=${{ env.IMAGE_NAME }}-buildcache:manual-${{ matrix.arch }}
          cache-to: type=registry,ref=${{ env.IMAGE_NAME }}-buildcache:manual-${{ matrix.arch }},mode=max,compression=zstd
      - name: Record this architecture's published digest
        env:
          IMAGE_DIGEST: ${{ steps.build.outputs.digest }}
        shell: bash
        run: |
          set -euo pipefail
          [[ "$IMAGE_DIGEST" =~ ^sha256:[0-9a-f]{64}$ ]]
          mkdir -p "$RUNNER_TEMP/manual-digest"
          printf '%s\n' "$IMAGE_DIGEST" > "$RUNNER_TEMP/manual-digest/digest"
      - uses: actions/upload-artifact@043fb46d1a93c77aae656e7c1c64a875d1fc6a0a # v7.0.1
        with:
          name: manual-digest-${{ matrix.arch }}
          path: ${{ runner.temp }}/manual-digest/digest
          if-no-files-found: error
          overwrite: true
          retention-days: 7

  publish:
    name: Publish and verify the combined image
    needs: [resolve, build]
    runs-on: ubuntu-24.04
    timeout-minutes: 10
    permissions:
      contents: read
      packages: write
    steps:
      - uses: docker/setup-buildx-action@d7f5e7f509e45cec5c76c4d5afdd7de93d0b3df5 # v4.1.0
      - uses: docker/login-action@650006c6eb7dba73a995cc03b0b2d7f5ca915bee # v4.2.0
        with:
          registry: ghcr.io
          username: ${{ github.actor }}
          password: ${{ secrets.GITHUB_TOKEN }}
      - uses: actions/download-artifact@3e5f45b2cfb9172054b4087a40e8e0b5a5461e7c # v8.0.1
        with:
          pattern: manual-digest-*
          path: ${{ runner.temp }}/manual-digests
      - name: Assemble and verify the published image
        env:
          SOURCE_SHA: ${{ needs.resolve.outputs.sha }}
          MANUAL_TAG: ${{ needs.resolve.outputs.tag }}
        shell: bash
        run: |
          set -euo pipefail
          digests=()
          for arch in amd64 arm64; do
            digest=$(cat "$RUNNER_TEMP/manual-digests/manual-digest-$arch/digest")
            [[ "$digest" =~ ^sha256:[0-9a-f]{64}$ ]]
            digests+=("$IMAGE_NAME@$digest")
          done
          image="$IMAGE_NAME:$MANUAL_TAG"
          docker buildx imagetools create --tag "$image" \
            --annotation "index:org.opencontainers.image.revision=$SOURCE_SHA" \
            --annotation "index:org.opencontainers.image.source=https://github.com/$GITHUB_REPOSITORY" \
            --annotation "index:xyz.buzz.manual-build=true" "${digests[@]}"
          # Verify the published bytes using this workflow, not scripts from the selected source.
          merged_digest=$(docker buildx imagetools inspect "$image" --format '{{json .Manifest}}' |
            jq -er '.digest | select(test("^sha256:[0-9a-f]{64}$"))')
          pinned="$IMAGE_NAME@$merged_digest"
          source_url="https://github.com/$GITHUB_REPOSITORY"
          docker buildx imagetools inspect "$pinned" --raw > "$RUNNER_TEMP/index.json"
          jq -e '.manifests |
            map(select((.platform.os == "unknown" and .platform.architecture == "unknown") | not)) |
            map(.platform.os + "/" + .platform.architecture) | sort == ["linux/amd64", "linux/arm64"]' \
            "$RUNNER_TEMP/index.json" >/dev/null
          runtime_digests='{}'
          for arch in amd64 arm64; do
            child=$(jq -er --arg arch "$arch" '.manifests[] |
              select(.platform.os == "linux" and .platform.architecture == $arch) |
              .digest | select(test("^sha256:[0-9a-f]{64}$"))' "$RUNNER_TEMP/index.json")
            docker buildx imagetools inspect "$IMAGE_NAME@$child" --format '{{json .Image}}' |
              jq -e --arg arch "$arch" --arg sha "$SOURCE_SHA" --arg source "$source_url" '
                .os == "linux" and .architecture == $arch and
                .config.Labels["org.opencontainers.image.revision"] == $sha and
                .config.Labels["org.opencontainers.image.source"] == $source' >/dev/null
            runtime_digests=$(jq -cn --argjson current "$runtime_digests" \
              --arg platform "linux/$arch" --arg digest "$child" '$current + {($platform): $digest}')
          done
          jq -n --arg image "$pinned" --arg tag "$image" --arg digest "$merged_digest" \
            --arg sha "$SOURCE_SHA" --arg source "$source_url" --argjson platforms "$runtime_digests" \
            '{image:$image, tag:$tag, digest:$digest, source_sha:$sha, source_url:$source,
              platforms:$platforms,
              ci_qualification:"skipped", status:"registry-verified"}' \
            > "$RUNNER_TEMP/manual-image.json"
          {
            echo '## Manual relay image published to GHCR'
            echo
            echo "Source commit: $SOURCE_SHA"
            echo "Registry tag: $image"
            echo "Digest: $(jq -r .digest "$RUNNER_TEMP/manual-image.json")"
            echo 'Platforms: linux/amd64, linux/arm64'
            echo 'CI qualification was skipped. No deployment was started.'
            echo 'Any downstream registry import must be verified separately.'
          } >> "$GITHUB_STEP_SUMMARY"
      - uses: actions/upload-artifact@043fb46d1a93c77aae656e7c1c64a875d1fc6a0a # v7.0.1
        with:
          name: manual-image-${{ github.run_id }}-${{ github.run_attempt }}
          path: ${{ runner.temp }}/manual-image.json
          if-no-files-found: error
          retention-days: 30