name: Build ISO image

on:
  push:
    tags: ["v*"]
  workflow_dispatch:
    inputs:
      arch:
        description: "Architecture"
        type: choice
        options: [amd64, arm64, both]
        default: amd64

permissions:
  contents: read

jobs:
  iso:
    name: ISO ${{ matrix.arch }}
    runs-on: ubuntu-24.04
    strategy:
      fail-fast: false
      matrix:
        arch: ${{ fromJSON(github.event_name == 'workflow_dispatch' && (inputs.arch == 'both' && '["amd64","arm64"]' || format('["{0}"]', inputs.arch)) || '["amd64","arm64"]') }}
    steps:
      - uses: actions/checkout@v4
        with:
          fetch-depth: 0
      - run: sudo apt-get update && sudo apt-get install -y xorriso
      - uses: actions/cache@v4
        with:
          path: .cache/iso
          key: ubuntu-iso-${{ matrix.arch }}-${{ hashFiles('image/build-iso.sh') }}
          restore-keys: ubuntu-iso-${{ matrix.arch }}-
      - run: make iso ARCH=${{ matrix.arch }}
      # Ubuntu server ISOs are larger than the 2 GB GitHub release asset limit,
      # so images are published as workflow artifacts.
      - uses: actions/upload-artifact@v4
        with:
          name: virtuality-iso-${{ matrix.arch }}
          path: |
            dist/*.iso
            dist/*.sha256
          compression-level: 0
          retention-days: 30