on: [pull_request, push]

jobs:
  ci:
    runs-on: ubuntu-20.04
    timeout-minutes: 15

    strategy:
      matrix:
        mode: [debug, release]
        module: [builtin, loadable]

    steps:
      # Setup
      - uses: actions/checkout@v2
      - run: sudo apt install libelf-dev qemu-system-x86 busybox-static
      - run: rustup default nightly-2020-08-27
      - run: rustup component add rust-src

      # Build
      - run: cp .github/workflows/kernel-${{ matrix.mode }}.config .config
      - if: matrix.module == 'loadable'
        run: sed -i -E 's/^(CONFIG_RUST_EXAMPLE=)(y)$/\1m/g' .config
      - run: make CC=clang-10 LLVM_CONFIG_PATH=llvm-config-10 -j3

      # Run
      - if: matrix.module == 'builtin'
        run: sed -i '/rust_example/d' .github/workflows/qemu-initramfs.desc
      - run: usr/gen_init_cpio .github/workflows/qemu-initramfs.desc > qemu-initramfs.img
      - run: qemu-system-x86_64 -kernel arch/x86/boot/bzImage -initrd qemu-initramfs.img -cpu Cascadelake-Server -smp 2 -append "console=ttyS0 ${{ matrix.module == 'builtin' && 'rust_example.my_i32=123321' || '' }}" -nographic -no-reboot | tee qemu-stdout.log

      # Check
      - run: grep -F 'Rust Example (init)' qemu-stdout.log
      - run: "grep 'my_i32: \\+123321' qemu-stdout.log"
      - if: matrix.module == 'loadable'
        run: grep -F 'Rust Example (exit)' qemu-stdout.log