name: CI Build & Kernel Verification

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

jobs:
  build:
    name: Build & Verify SUB-OS
    runs-on: ubuntu-latest

    steps:
      - name: Checkout Code
        uses: actions/checkout@v4

      - name: Install Build Dependencies
        run: |
          sudo apt-get update
          sudo apt-get install -y nasm gcc-x86-64-linux-gnu binutils-x86-64-linux-gnu make qemu-system-x86

      - name: Compile SUB-OS Kernel & Bootloader
        run: |
          make clean
          make CROSS_COMPILE=x86_64-linux-gnu-

      - name: Verify Image Generation
        run: |
          test -f SUB-OS.img
          test -f build/kernel.elf
          test -f build/kernel.bin
          ls -lh SUB-OS.img build/kernel.elf build/kernel.bin