name: Build Kernel - ChromeOS ARCVM
on:
  push:
    branches: ["main"]
    paths:
      - ".github/workflows/build-kernel-arcvm.yml"
      - "kernel/**"
  pull_request:
    branches: ["main"]
    paths:
      - ".github/workflows/build-kernel-arcvm.yml"
      - "kernel/**"
  workflow_call:
  workflow_dispatch:

jobs:
  build:
    strategy:
      matrix:
        arch: [x86_64]
        version: ["5.10.178"]
        include:
          - arch: x86_64
            git_tag: chromeos-5.10-arcvm
            file_name: "bzImage"

    name: Build ChromeOS ARCVM kernel
    runs-on: ubuntu-20.04
    env:
      LTO: thin
      ROOT_DIR: /
      KERNEL_DIR: ${{ github.workspace }}/kernel

    steps:
      - name: Install Build Tools
        run: |
          sudo apt-get update
          sudo apt-get install -y --no-install-recommends bc \
              bison build-essential ca-certificates flex git gnupg \
              libelf-dev libssl-dev lsb-release software-properties-common wget \
              libncurses-dev binutils-aarch64-linux-gnu gcc-aarch64-linux-gnu nuget gzip \
              rsync python3 device-tree-compiler

          sudo ln -s --force python3 /usr/bin/python

          export LLVM_VERSION=12
          wget https://apt.llvm.org/llvm.sh
          chmod +x llvm.sh
          sudo ./llvm.sh $LLVM_VERSION
          rm ./llvm.sh
          sudo ln -s --force /usr/bin/clang-$LLVM_VERSION /usr/bin/clang
          sudo ln -s --force /usr/bin/ld.lld-$LLVM_VERSION /usr/bin/ld.lld
          sudo ln -s --force /usr/bin/llvm-objdump-$LLVM_VERSION /usr/bin/llvm-objdump
          sudo ln -s --force /usr/bin/llvm-ar-$LLVM_VERSION /usr/bin/llvm-ar
          sudo ln -s --force /usr/bin/llvm-nm-$LLVM_VERSION /usr/bin/llvm-nm
          sudo ln -s --force /usr/bin/llvm-strip-$LLVM_VERSION /usr/bin/llvm-strip
          sudo ln -s --force /usr/bin/llvm-objcopy-$LLVM_VERSION /usr/bin/llvm-objcopy
          sudo ln -s --force /usr/bin/llvm-readelf-$LLVM_VERSION /usr/bin/llvm-readelf
          sudo ln -s --force /usr/bin/clang++-$LLVM_VERSION /usr/bin/clang++

      - name: Checkout KernelSU
        uses: actions/checkout@v3
        with:
          path: KernelSU
          ref: main
          fetch-depth: 0

      - name: Setup kernel source
        run: git clone https://chromium.googlesource.com/chromiumos/third_party/kernel.git -b ${{ matrix.git_tag }} --depth=1

      - name: Setup KernelSU
        working-directory: kernel
        run: |
          echo "[+] KernelSU setup"
          KERNEL_ROOT=$GITHUB_WORKSPACE/kernel
          echo "[+] KERNEL_ROOT: $KERNEL_ROOT"
          echo "[+] Copy KernelSU driver to $KERNEL_ROOT/drivers"
          ln -sf $GITHUB_WORKSPACE/KernelSU/kernel $KERNEL_ROOT/drivers/kernelsu

          echo "[+] Add KernelSU driver to Makefile"
          DRIVER_MAKEFILE=$KERNEL_ROOT/drivers/Makefile
          grep -q "kernelsu" $DRIVER_MAKEFILE || echo "obj-y += kernelsu/" >> $DRIVER_MAKEFILE

          echo "[+] Apply KernelSU patches"
          cd $KERNEL_ROOT && git apply $GITHUB_WORKSPACE/KernelSU/.github/patches/5.10/*.patch

          echo "[+] Patch script/setlocalversion"
          sed -i 's/-dirty//g' $KERNEL_ROOT/scripts/setlocalversion

          echo "[+] KernelSU setup done."
          cd $GITHUB_WORKSPACE/KernelSU
          VERSION=$(($(git rev-list --count HEAD) + 10200))
          echo "VERSION: $VERSION"
          echo "kernelsu_version=$VERSION" >> $GITHUB_ENV

      - name: Build Kernel
        working-directory: kernel
        run: |
          set -a && . build.config.gki.x86_64; set +a
          export DEFCONFIG=x86_64_arcvm_defconfig

          make LLVM=1 LLVM_IAS=1 DEPMOD=depmod DTC=dtc O=${PWD} mrproper
          make LLVM=1 LLVM_IAS=1 DEPMOD=depmod DTC=dtc O=${PWD} ${DEFCONFIG} < /dev/null
          scripts/config --file .config -e LTO_CLANG -d LTO_NONE -e LTO_CLANG_THIN -d LTO_CLANG_FULL -e THINLTO
          make LLVM=1 LLVM_IAS=1 DEPMOD=depmod DTC=dtc O=${PWD} -j$(nproc) bzImage modules prepare-objtool

          echo "file_path=${PWD}/arch/x86/boot/bzImage" >> $GITHUB_ENV

      - name: Upload kernel-ARCVM-${{ matrix.arch }}-${{ matrix.version }}
        uses: actions/upload-artifact@v3
        with:
          name: kernel-ARCVM-${{ matrix.arch }}-${{ matrix.version }}
          path: "${{ env.file_path }}"

      - name: Post to Telegram
        if: ${{ ( github.event_name == 'push' && github.ref == 'refs/heads/main' ) || github.ref_type == 'tag' }}
        env:
          CHAT_ID: ${{ secrets.CHAT_ID }}
          CACHE_CHAT_ID: ${{ secrets.CACHE_CHAT_ID }}
          BOT_TOKEN: ${{ secrets.BOT_TOKEN }}
          MESSAGE_THREAD_ID: ${{ secrets.MESSAGE_THREAD_ID }}
          COMMIT_MESSAGE: ${{ github.event.head_commit.message }}
          COMMIT_URL: ${{ github.event.head_commit.url }}
          RUN_URL: ${{ github.server_url }}/${{ github.repository }}/actions/runs/${{ github.run_id }}
        run: |
          TITLE=kernel-ARCVM-${{ matrix.arch }}-${{ matrix.version }}
          echo "[+] title: $TITLE"
          export TITLE
          export VERSION="${{ env.kernelsu_version }}"
          echo "[+] Compress images"
          gzip -n -f -9 "${{ env.file_path }}"
          echo "[+] Image to upload"
          ls -l "${{ env.file_path }}.gz"
          if [ -n "${{ secrets.BOT_TOKEN }}" ]; then
            pip3 install python-telegram-bot
            python3 "$GITHUB_WORKSPACE/KernelSU/scripts/ksubot.py" "${{ env.file_path }}.gz"
          fi