name: Publish System AMIs

# Builds the system AMIs (libguestfs, on the runner) and publishes each
# compressed qcow2 + .sha256 sidecar to the Cloudflare R2 bucket that backs
# iso.mulgadc.com/system-ami/. Six images ship:
#   spinifex-eks-node       Alpine EKS K3s node (server|agent, role at boot)
#   spinifex-ecs-node       Alpine ECS container instance
#   spinifex-eks-node-gpu   Ubuntu EKS K3s GPU worker (NVIDIA driver + toolkit)
#   spinifex-ecs-node-gpu   Ubuntu ECS GPU container instance
#   spinifex-rds-postgres   Alpine RDS PostgreSQL instance
#   spinifex-rds-mariadb    Alpine RDS MariaDB instance
# Operators then install them on any cluster with:
#   spx admin images import --name spinifex-eks-node
#   spx admin images import --name spinifex-ecs-node
#   spx admin images import --name spinifex-eks-node-gpu
#   spx admin images import --name spinifex-ecs-node-gpu
#   spx admin images import --name spinifex-rds-postgres
#   spx admin images import --name spinifex-rds-mariadb
#
# Publishing overwrites the mirror artifact, so it runs only from release.yml
# once a tag has passed its gates, with siblings at the tags go.mod requires.
# The `variant` input scopes which images build — the Ubuntu GPU legs are 16G
# and much slower (NVIDIA driver download + DKMS build).

on:
  workflow_call:
    inputs:
      variant:
        description: "Which images to build (all|cpu|gpu|rds)"
        type: string
        default: all
      dry_run:
        description: "Build + convert only; skip the R2 upload"
        type: boolean
        default: false

permissions:
  contents: read

concurrency:
  group: publish-eks-ami
  cancel-in-progress: false

jobs:
  matrix:
    name: Resolve image matrix
    runs-on: [self-hosted, ci-single]
    outputs:
      images: ${{ steps.gen.outputs.images }}
    steps:
      - name: Select images for variant
        id: gen
        env:
          VARIANT: ${{ inputs.variant }}
        run: |
          set -euo pipefail
          cpu='{"name":"spinifex-eks-node","manifest":"scripts/images/eks-node/manifest.conf"},{"name":"spinifex-ecs-node","manifest":"scripts/images/ecs-agent/manifest.conf"}'
          gpu='{"name":"spinifex-eks-node-gpu","manifest":"scripts/images/eks-node-gpu/manifest.conf"},{"name":"spinifex-ecs-node-gpu","manifest":"scripts/images/ecs-agent-gpu/manifest.conf"}'
          rds='{"name":"spinifex-rds-postgres","manifest":"scripts/images/rds-postgres/manifest.conf"},{"name":"spinifex-rds-mariadb","manifest":"scripts/images/rds-mariadb/manifest.conf"}'
          case "${VARIANT}" in
            cpu) items="${cpu}" ;;
            gpu) items="${gpu}" ;;
            rds) items="${rds}" ;;
            *)   items="${cpu},${gpu},${rds}" ;;
          esac
          echo "images={\"include\":[${items}]}" >> "$GITHUB_OUTPUT"

  publish:
    name: Build + publish ${{ matrix.name }}
    needs: matrix
    runs-on: [self-hosted, ci-single]
    strategy:
      fail-fast: false
      # ci-single is one runner and each GPU build needs ~16G of scratch disk;
      # serialise the legs so they never contend for /_temp or the mirror.
      max-parallel: 1
      matrix: ${{ fromJSON(needs.matrix.outputs.images) }}

    steps:
      - name: Checkout Spinifex
        uses: actions/checkout@v7.0.1
        with:
          path: spinifex

      - name: Resolve sibling release tags from go.mod
        id: siblings
        run: bash spinifex/.github/resolve-release-sibling-refs.sh spinifex/go.mod

      - name: Checkout Viperblock
        uses: actions/checkout@v7.0.1
        with:
          repository: mulgadc/viperblock
          ref: ${{ steps.siblings.outputs.viperblock }}
          path: viperblock

      - name: Checkout Predastore
        uses: actions/checkout@v7.0.1
        with:
          repository: mulgadc/predastore
          ref: ${{ steps.siblings.outputs.predastore }}
          path: predastore

      - name: Checkout Northstar
        uses: actions/checkout@v7.0.1
        with:
          repository: mulgadc/northstar
          ref: ${{ steps.siblings.outputs.northstar }}
          path: northstar

      - name: Checkout Bluebottle
        uses: actions/checkout@v7.0.1
        with:
          repository: mulgadc/bluebottle
          ref: ${{ steps.siblings.outputs.bluebottle }}
          path: bluebottle

      - name: Setup Go
        uses: actions/setup-go@v7.0.0
        with:
          go-version-file: "spinifex/go.mod"
          # Self-hosted runner: the Go module + build cache already persists on
          # local disk between runs.
          cache: false

      - name: Setup Go Workspace
        # Idempotent: the ci-single runner reuses one workspace across matrix
        # legs and runs, and checkout never scrubs the root go.work. Remove any
        # stale file so each leg re-inits cleanly instead of failing on
        # "go.work already exists".
        run: |
          rm -f go.work go.work.sum
          go work init ./spinifex ./viperblock ./predastore ./northstar ./bluebottle

      - name: Install build + upload tooling
        run: |
          set -euo pipefail
          sudo apt-get update -qq
          sudo apt-get install -y --no-install-recommends libguestfs-tools qemu-utils
          if ! command -v aws &>/dev/null; then
            curl -fsSL "https://awscli.amazonaws.com/awscli-exe-linux-x86_64.zip" -o /tmp/awscliv2.zip
            unzip -q /tmp/awscliv2.zip -d /tmp/aws-install
            sudo /tmp/aws-install/aws/install
            rm -rf /tmp/awscliv2.zip /tmp/aws-install
          fi

      - name: Build + publish ${{ matrix.name }} to R2
        working-directory: spinifex
        env:
          AWS_ACCESS_KEY_ID: ${{ secrets.CF_R2_ACCESS_KEY_ID }}
          AWS_SECRET_ACCESS_KEY: ${{ secrets.CF_R2_SECRET_ACCESS_KEY }}
          R2_ENDPOINT: ${{ secrets.CF_R2_ENDPOINT_URL }}
          R2_BUCKET: spinifex-iso
          DRY_RUN: ${{ inputs.dry_run }}
          MANIFEST: ${{ matrix.manifest }}
          # Ubuntu GPU images are 16G — a RAM-backed /tmp cannot hold the qcow2 +
          # expanded raw, so point the build scratch at the runner's on-disk
          # _temp. Harmless for the small Alpine legs too.
          SYSTEM_IMAGE_BUILD_DIR: ${{ runner.temp }}/system-image-build
        run: |
          set -euo pipefail
          # libguestfs needs to read a host kernel; Ubuntu ships it mode 0600.
          # direct backend = no libvirt on the runner.
          export LIBGUESTFS_BACKEND=direct
          sudo chmod 0644 /boot/vmlinuz-* || true
          mkdir -p "${SYSTEM_IMAGE_BUILD_DIR}"
          FLAGS=(--build)
          if [[ "${DRY_RUN}" == "true" ]]; then
            FLAGS+=(--dry-run)
          fi
          ./scripts/publish-system-image.sh "${MANIFEST}" "${FLAGS[@]}"