ci.yml

name: CI

on:
  push:
    branches: [main]
  pull_request:
    branches: [main]
  workflow_dispatch:

permissions:
  contents: read

concurrency:
  group: ci-${{ github.ref }}
  cancel-in-progress: true

jobs:
  verify:
    name: Repository and cumulative kernel verification
    runs-on: ubuntu-latest
    timeout-minutes: 30

    steps:
      - name: Check out repository
        uses: actions/checkout@v4
        with:
          fetch-depth: 0

      - name: Install xv6 toolchain and QEMU
        run: |
          sudo apt-get update
          sudo apt-get install --yes --no-install-recommends \
            build-essential gcc-multilib make perl python3 qemu-system-x86

      - name: Check dependencies
        run: make setup

      - name: Check repository structure and source invariants
        run: make lint

      - name: Run fast regression tests
        run: make test

      - name: Rebuild cumulative source, dist, and counter modes
        run: make verify-build

      - name: Run cumulative guest smoke test
        run: make smoke CPUS=2