name: build-image

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

# Builds raw disk images of the two default-tier editions (see
# cook/recipes_manifest.yaml) with build-image.sh, i.e.
# `livemedia-creator --no-virt --make-disk`. Other tiers (guest, experimental)
# are built on demand with `./build-image.sh --tier <tier>`.
#
# The build job runs on the registered `fedora:host` runner (a Fedora VM, jobs
# run as root), not in a container: --make-disk needs real loop devices and a
# live systemd-udevd. The runner needs lorax-lmc-novirt, qemu-img, make,
# python3-pip, pykickstart and xz installed.

jobs:
  validate:
    runs-on: fedora
    defaults:
      run:
        shell: bash
    container:
      image: git.phyllo.me/devops/fedora-runner-image:latest

    steps:
      - uses: https://git.phyllo.me/devops/checkout@v5
        with:
          fetch-depth: 0

      - name: Install Python deps
        run: pip install -r cook/requirements.txt

      - name: Generate, lint, and validate dishes
        run: |
          cd cook
          make all

  build-image:
    needs: validate
    runs-on: fedora
    strategy:
      fail-fast: false
      # One image at a time: each build takes loop devices, RAM and tens of GiB
      max-parallel: 1
      matrix:
        include:
          - edition: phyllomeos
            root_size: 16384
          - edition: phyllomeos-headless
            root_size: 8192
    defaults:
      run:
        shell: bash
    env:
      # /tmp is a small tmpfs on the runner; livemedia-creator writes the whole
      # disk image under $TMPDIR
      TMPDIR: /var/tmp

    steps:
      - uses: https://git.phyllo.me/devops/checkout@v5
        with:
          fetch-depth: 0

      - name: Check runner prerequisites
        run: |
          missing=0
          for tool in livemedia-creator qemu-img make pip xz sudo; do
            command -v "$tool" >/dev/null || { echo "missing on runner: $tool"; missing=1; }
          done
          [ -e /dev/loop-control ] || { echo "missing on runner: /dev/loop-control"; missing=1; }
          [ "$missing" = 0 ] || exit 1

      - name: Install Python deps
        run: pip install -r cook/requirements.txt

      - name: Build raw image
        run: |
          # Editions are named "<edition>_<values...>.cfg"; the trailing "_" keeps
          # "phyllomeos" from matching "phyllomeos-headless".
          (cd cook && make all)
          dish="$(basename "$(ls cook/dishes/${{ matrix.edition }}_*.cfg)" .cfg)"
          echo "DISH=$dish" >> "$GITHUB_ENV"
          ./build-image.sh --dish "$dish" --root-size ${{ matrix.root_size }}
          xz -T0 "build/$dish.img"

      - name: Upload image and kickstart as artifact
        if: github.ref == 'refs/heads/main'
        uses: actions/upload-artifact@v3
        with:
          name: ${{ matrix.edition }}
          path: |
            build/${{ env.DISH }}.img.xz
            cook/dishes/${{ env.DISH }}.cfg
          if-no-files-found: error

      - name: Publish image and kickstart as release
        if: startsWith(github.ref, 'refs/tags/')
        uses: https://git.phyllo.me/devops/action-gh-release@v2
        with:
          files: |
            build/${{ env.DISH }}.img.xz
            cook/dishes/${{ env.DISH }}.cfg
          draft: false
          prerelease: false

      - name: Clean up build products
        if: always()
        run: rm -rf build /var/tmp/lmc-result.*