name: Build the boxes

"on":
  workflow_dispatch:
  release:
    types:
      - published
      - prereleased
  pull_request:

env:
  PACKER_PLUGIN_PATH: "~/.config/packer/plugins"

jobs:
  collect:
    name: Discover distros
    runs-on: ubuntu-latest
    outputs:
      distros: ${{ steps.distros.outputs.distros }}
      build: ${{ steps.time.outputs.time }}
    steps:
      - name: Checkout code
        uses: actions/checkout@v3

      - name: Install python
        uses: actions/setup-python@v4
        with:
          python-version: 3
          cache: pip
          cache-dependency-path: .github/workflows/build.yml

      - name: Discover boxes
        id: distros
        run: |-
          set -exo pipefail
          pip install xonsh PyYAML
          echo "distros=$(xonsh build.xsh -a --list)" >> "$GITHUB_OUTPUT"

      - name: Find timestamp for versioning
        id: time
        uses: nanzm/get-time-action@v2.0
        with:
          format: 'YYYY.MM.DD.HH'

  build:
    name: Build box
    runs-on: ${{ matrix.runner }}
    needs:
      - collect
    strategy:
      fail-fast: false
      matrix: ${{ fromJson( needs.collect.outputs.distros ) }}
    steps:
      - name: Checkout project
        uses: actions/checkout@v3

      - name: Install Packer and related tools
        uses: ./.github/actions/install_packer

      - name: Clear disk space
        uses: greg-hellings/make-space@main

      - name: Output tool versions
        shell: bash
        run: |
          set -x
          packer -version
          if $(type qemu-system-x86_64); then
            qemu-system-x86_64 -version
          fi
          if $(type VBoxManage); then
            VBoxManage --version;
          fi

      - name: Run generator, if necessary
        shell: bash
        run: |
          if [ -f "${{ matrix.distro }}.sh" ]; then
            "./${{ matrix.distro }}.sh"
          fi

      - name: Restore Packer plugin cache
        uses: actions/cache/restore@v3
        id: cache-restore
        with:
          path: ~/.config/packer/plugins
          key: ${{ runner.os }}-${{ hashFiles('sources/build.pkr.hcl') }}

      - name: Install Packer plugins
        shell: bash
        run: packer init sources

      - name: Cache Packer plugins
        uses: actions/cache/save@v3
        if: always()
        with:
          path: ~/.config/packer/plugins
          key: ${{ steps.cache-restore.outputs.cache-primary-key }}

      - name: Build
        shell: bash
        run: |
          set -e
          # Add a retry in case something bogus like a network failure happens
          packer build -only="${{ matrix.builder }}" \
                       -var-file="${{ matrix.distro }}" \
                       -var "qemu_accelerator=tcg" \
                       -var "build=${{ needs.collect.outputs.build }}" \
                       -var "cpu_model=Skylake-Client" \
                       -var "cpus=2" \
                       -var "memory=4096" \
                       ${{ github.event_name != 'release' && '-except=upload' || '' }} \
                       sources
        env:
          VAGRANT_CLOUD_TOKEN: ${{ secrets.VAGRANT_CLOUD_TOKEN }}
          PACKER_LOG: 1 #${{ contains(matrix.needs_timeout, matrix.distro) && '0' || '0' }}

      - name: Upload artifact
        if: ${{ failure() }}
        uses: actions/upload-artifact@v3
        with:
          name: serial-output
          path: serial-output*