build-kernel.yml

name: Build Kernel

on:
  workflow_dispatch: # Allows manual triggering of the workflow

jobs:
  build_kernel:
    runs-on: ubuntu-latest

    steps:
      # Step 0: Maximize build space
      - name: Maximize build space
        uses: easimon/maximize-build-space@master
        with:
          root-reserve-mb: 8192
          temp-reserve-mb: 2048
          remove-dotnet: 'true'
          remove-android: 'true'
          remove-haskell: 'true'
          remove-codeql: 'true'

      # Step 1: Download prebuilt toolchain
      - name: Download prebuilt toolchain
        run: |
          AOSP_MIRROR=https://android.googlesource.com
          BRANCH=main-kernel-build-2024
          
          # Clone necessary prebuilt tools
          git clone $AOSP_MIRROR/platform/prebuilts/build-tools -b $BRANCH --depth 1 build-tools
          git clone $AOSP_MIRROR/kernel/prebuilts/build-tools -b $BRANCH --depth 1 kernel-build-tools
          git clone $AOSP_MIRROR/platform/system/tools/mkbootimg -b $BRANCH --depth 1 mkbootimg
          
          # Add tools to PATH
          echo "$GITHUB_WORKSPACE/kernel-build-tools/linux-x86/bin" >> $GITHUB_PATH
          echo "$GITHUB_WORKSPACE/build-tools/path/linux-x86" >> $GITHUB_PATH
          echo "$GITHUB_WORKSPACE/mkbootimg" >> $GITHUB_PATH

      # Step 2: Set boot sign key (store key in the environment and write to a file in new directory)
      - name: Set boot sign key
        env:
          BOOT_SIGN_KEY: ${{ secrets.BOOT_SIGN_KEY }}  # Environment variable for the key
        run: |
          if [ ! -z "$BOOT_SIGN_KEY" ]; then
            # Create a new directory in GITHUB_WORKSPACE to avoid permission issues
            mkdir -p $GITHUB_WORKSPACE/avb_keys
            echo "$BOOT_SIGN_KEY" > $GITHUB_WORKSPACE/avb_keys/testkey_rsa2048.pem
            # Ensure it's readable by everyone
            chmod 644 $GITHUB_WORKSPACE/avb_keys/testkey_rsa2048.pem
            # Optionally, add the directory to the PATH
            echo "$GITHUB_WORKSPACE/avb_keys" >> $GITHUB_PATH
          fi

      # Step 3: Install 'repo' tool
      - name: Install 'repo' tool
        run: |
          curl https://storage.googleapis.com/git-repo-downloads/repo > $GITHUB_WORKSPACE/repo
          chmod a+rx $GITHUB_WORKSPACE/repo
          echo "$GITHUB_WORKSPACE" >> $GITHUB_PATH

      # Step 4: Clone kernel build scripts
      - name: Clone kernel build scripts
        run: |
          git clone https://github.com/TheWildJames/kernel_build_scripts.git

      # Step 5: Run kernel build script
      - name: Run kernel build script
        run: |
          chmod +x kernel_build_scripts/GKI/aio_gki_build_kernel_release.sh
          kernel_build_scripts/GKI/aio_gki_build_kernel_release.sh