GKI_KernelSU_SUSFS/.github/actions/build-boot-images/action.yml

name: 'Build Boot Images'
description: 'Creates boot artifacts (boot.img, boot-gz.img, boot-lz4.img) and stores them in boot-artifacts/'

runs:
  using: composite
  steps:
    - shell: bash
      working-directory: ${{ github.workspace }}
      run: |
        set -euo pipefail

        mkdir -p bootimgs
        mkdir -p boot-artifacts

        if [ -f "$GITHUB_WORKSPACE/kernel/out/$ANDROID_VERSION-$KERNEL_VERSION/dist/Image" ]; then
          cp "$GITHUB_WORKSPACE/kernel/out/$ANDROID_VERSION-$KERNEL_VERSION/dist/Image" "$GITHUB_WORKSPACE/bootimgs/Image"
          cp "$GITHUB_WORKSPACE/kernel/out/$ANDROID_VERSION-$KERNEL_VERSION/dist/Image.lz4" "$GITHUB_WORKSPACE/bootimgs/Image.lz4"
        else
          cp "$GITHUB_WORKSPACE/kernel/bazel-bin/common/kernel_aarch64/Image" "$GITHUB_WORKSPACE/bootimgs/Image"
          cp "$GITHUB_WORKSPACE/kernel/bazel-bin/common/kernel_aarch64/Image.lz4" "$GITHUB_WORKSPACE/bootimgs/Image.lz4"
        fi

        gzip -n -k -f -9 "$GITHUB_WORKSPACE/bootimgs/Image" > "$GITHUB_WORKSPACE/bootimgs/Image.gz"

        cd "$GITHUB_WORKSPACE/bootimgs"

        case "$ANDROID_VERSION" in
          android12)
            GKI_URL="https://dl.google.com/android/gki/gki-certified-boot-android12-5.10-${OS_PATCH_LEVEL}_r1.zip"
            FALLBACK_URL="https://dl.google.com/android/gki/gki-certified-boot-android12-5.10-2023-01_r1.zip"

            status="$(curl -sL -w "%{http_code}" "$GKI_URL" -o /dev/null || true)"
            if [ "$status" = "200" ]; then
              curl -L -o gki-kernel.zip "$GKI_URL"
            else
              curl -L -o gki-kernel.zip "$FALLBACK_URL"
            fi

            unzip -q gki-kernel.zip
            rm -f gki-kernel.zip

            if [ -f "./boot-5.10.img" ]; then
              BOOT_IMG="./boot-5.10.img"
            else
              BOOT_IMG="$(ls -1 ./boot-*.img 2>/dev/null | head -n 1 || true)"
            fi

            if [ -z "${BOOT_IMG:-}" ]; then
              exit 1
            fi

            "$UNPACK_BOOTIMG" --boot_img="$PWD/$BOOT_IMG"
            ;;
        esac

        for kernel_image in Image Image.gz Image.lz4; do
          case "$kernel_image" in
            Image) output_image="boot.img" ;;
            Image.gz) output_image="boot-gz.img" ;;
            Image.lz4) output_image="boot-lz4.img" ;;
          esac

          if [ "$ANDROID_VERSION" = "android12" ]; then
            "$MKBOOTIMG" --header_version 4 --kernel "$kernel_image" --output "$output_image" --ramdisk out/ramdisk --os_version 12.0.0 --os_patch_level "$OS_PATCH_LEVEL"
          else
            "$MKBOOTIMG" --header_version 4 --kernel "$kernel_image" --output "$output_image"
          fi

          "$AVBTOOL" add_hash_footer --partition_name boot --partition_size $((64 * 1024 * 1024)) --image "$output_image" --algorithm SHA256_RSA2048 --key "$BOOT_SIGN_KEY_PATH"
          cp "$output_image" "$GITHUB_WORKSPACE/boot-artifacts/${FILE_NAME}-${output_image}"
        done