/*
 * Copyright (C) 2019 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

#include "host/commands/assemble_cvd/disk_flags.h"

#include <android-base/logging.h>
#include <android-base/parsebool.h>
#include <android-base/parseint.h>
#include <android-base/strings.h>
#include <fruit/fruit.h>
#include <gflags/gflags.h>
#include <sys/statvfs.h>

#include <fstream>

#include "common/libs/fs/shared_buf.h"
#include "common/libs/utils/files.h"
#include "common/libs/utils/size_utils.h"
#include "common/libs/utils/subprocess.h"
#include "host/commands/assemble_cvd/boot_config.h"
#include "host/commands/assemble_cvd/boot_image_utils.h"
#include "host/commands/assemble_cvd/disk_builder.h"
#include "host/commands/assemble_cvd/flags_defaults.h"
#include "host/commands/assemble_cvd/super_image_mixer.h"
#include "host/commands/assemble_cvd/vendor_dlkm_utils.h"
#include "host/libs/config/bootconfig_args.h"
#include "host/libs/config/cuttlefish_config.h"
#include "host/libs/config/data_image.h"
#include "host/libs/config/inject.h"
#include "host/libs/config/instance_nums.h"
#include "host/libs/vm_manager/gem5_manager.h"


// Taken from external/avb/avbtool.py; this define is not in the headers
#define MAX_AVB_METADATA_SIZE 69632ul

DECLARE_string(system_image_dir);

DEFINE_string(boot_image, CF_DEFAULTS_BOOT_IMAGE,
              "Location of cuttlefish boot image. If empty it is assumed to be "
              "boot.img in the directory specified by -system_image_dir.");
DEFINE_string(
    init_boot_image, CF_DEFAULTS_INIT_BOOT_IMAGE,
    "Location of cuttlefish init boot image. If empty it is assumed to "
    "be init_boot.img in the directory specified by -system_image_dir.");
DEFINE_string(data_image, CF_DEFAULTS_DATA_IMAGE,
              "Location of the data partition image.");
DEFINE_string(super_image, CF_DEFAULTS_SUPER_IMAGE,
              "Location of the super partition image.");
DEFINE_string(misc_image, CF_DEFAULTS_MISC_IMAGE,
              "Location of the misc partition image. If the image does not "
              "exist, a blank new misc partition image is created.");
DEFINE_string(misc_info_txt, "", "Location of the misc_info.txt file.");
DEFINE_string(metadata_image, CF_DEFAULTS_METADATA_IMAGE,
              "Location of the metadata partition image "
              "to be generated.");
DEFINE_string(
    vendor_boot_image, CF_DEFAULTS_VENDOR_BOOT_IMAGE,
    "Location of cuttlefish vendor boot image. If empty it is assumed to "
    "be vendor_boot.img in the directory specified by -system_image_dir.");
DEFINE_string(vbmeta_image, CF_DEFAULTS_VBMETA_IMAGE,
              "Location of cuttlefish vbmeta image. If empty it is assumed to "
              "be vbmeta.img in the directory specified by -system_image_dir.");
DEFINE_string(
    vbmeta_system_image, CF_DEFAULTS_VBMETA_SYSTEM_IMAGE,
    "Location of cuttlefish vbmeta_system image. If empty it is assumed to "
    "be vbmeta_system.img in the directory specified by -system_image_dir.");
DEFINE_string(
    vbmeta_vendor_dlkm_image, CF_DEFAULTS_VBMETA_VENDOR_DLKM_IMAGE,
    "Location of cuttlefish vbmeta_vendor_dlkm image. If empty it is assumed "
    "to "
    "be vbmeta_vendor_dlkm.img in the directory specified by "
    "-system_image_dir.");

DEFINE_string(linux_kernel_path, CF_DEFAULTS_LINUX_KERNEL_PATH,
              "Location of linux kernel for cuttlefish otheros flow.");
DEFINE_string(linux_initramfs_path, CF_DEFAULTS_LINUX_INITRAMFS_PATH,
              "Location of linux initramfs.img for cuttlefish otheros flow.");
DEFINE_string(linux_root_image, CF_DEFAULTS_LINUX_ROOT_IMAGE,
              "Location of linux root filesystem image for cuttlefish otheros flow.");

DEFINE_string(fuchsia_zedboot_path, CF_DEFAULTS_FUCHSIA_ZEDBOOT_PATH,
              "Location of fuchsia zedboot path for cuttlefish otheros flow.");
DEFINE_string(fuchsia_multiboot_bin_path, CF_DEFAULTS_FUCHSIA_MULTIBOOT_BIN_PATH,
              "Location of fuchsia multiboot bin path for cuttlefish otheros flow.");
DEFINE_string(fuchsia_root_image, CF_DEFAULTS_FUCHSIA_ROOT_IMAGE,
              "Location of fuchsia root filesystem image for cuttlefish otheros flow.");

DEFINE_string(custom_partition_path, CF_DEFAULTS_CUSTOM_PARTITION_PATH,
              "Location of custom image that will be passed as a \"custom\" partition"
              "to rootfs and can be used by /dev/block/by-name/custom");

DEFINE_string(blank_metadata_image_mb, CF_DEFAULTS_BLANK_METADATA_IMAGE_MB,
              "The size of the blank metadata image to generate, MB.");
DEFINE_string(
    blank_sdcard_image_mb, CF_DEFAULTS_BLANK_SDCARD_IMAGE_MB,
    "If enabled, the size of the blank sdcard image to generate, MB.");

DECLARE_string(ap_rootfs_image);
DECLARE_string(bootloader);
DECLARE_string(initramfs_path);
DECLARE_string(kernel_path);
DECLARE_bool(resume);
DECLARE_bool(use_overlay);

namespace cuttlefish {

using APBootFlow = CuttlefishConfig::InstanceSpecific::APBootFlow;
using vm_manager::Gem5Manager;

Result<void> ResolveInstanceFiles() {
  CF_EXPECT(!FLAGS_system_image_dir.empty(),
            "--system_image_dir must be specified.");

  std::vector<std::string> system_image_dir =
      android::base::Split(FLAGS_system_image_dir, ",");
  std::string default_boot_image = "";
  std::string default_init_boot_image = "";
  std::string default_data_image = "";
  std::string default_metadata_image = "";
  std::string default_super_image = "";
  std::string default_misc_image = "";
  std::string default_misc_info_txt = "";
  std::string default_vendor_boot_image = "";
  std::string default_vbmeta_image = "";
  std::string default_vbmeta_system_image = "";
  std::string default_vbmeta_vendor_dlkm_image = "";

  std::string cur_system_image_dir;
  std::string comma_str = "";
  auto instance_nums =
      CF_EXPECT(InstanceNumsCalculator().FromGlobalGflags().Calculate());
  for (int instance_index = 0; instance_index < instance_nums.size(); instance_index++) {
    if (instance_index < system_image_dir.size()) {
      cur_system_image_dir = system_image_dir[instance_index];
    } else {
      // legacy variable or out of boundary. Vectorize by copy [0] to all instances
      cur_system_image_dir = system_image_dir[0];
    }
    if (instance_index > 0) {
      comma_str = ",";
    }

    // If user did not specify location of either of these files, expect them to
    // be placed in --system_image_dir location.
    default_boot_image += comma_str + cur_system_image_dir + "/boot.img";
    default_init_boot_image += comma_str + cur_system_image_dir + "/init_boot.img";
    default_data_image += comma_str + cur_system_image_dir + "/userdata.img";
    default_metadata_image += comma_str + cur_system_image_dir + "/metadata.img";
    default_super_image += comma_str + cur_system_image_dir + "/super.img";
    default_misc_image += comma_str + cur_system_image_dir + "/misc.img";
    default_misc_info_txt +=
        comma_str + cur_system_image_dir + "/misc_info.txt";
    default_vendor_boot_image += comma_str + cur_system_image_dir + "/vendor_boot.img";
    default_vbmeta_image += comma_str + cur_system_image_dir + "/vbmeta.img";
    default_vbmeta_system_image += comma_str + cur_system_image_dir + "/vbmeta_system.img";
    default_vbmeta_vendor_dlkm_image +=
        comma_str + cur_system_image_dir + "/vbmeta_vendor_dlkm.img";
  }
  SetCommandLineOptionWithMode("boot_image", default_boot_image.c_str(),
                               google::FlagSettingMode::SET_FLAGS_DEFAULT);
  SetCommandLineOptionWithMode("init_boot_image",
                               default_init_boot_image.c_str(),
                               google::FlagSettingMode::SET_FLAGS_DEFAULT);
  SetCommandLineOptionWithMode("data_image", default_data_image.c_str(),
                               google::FlagSettingMode::SET_FLAGS_DEFAULT);
  SetCommandLineOptionWithMode("metadata_image", default_metadata_image.c_str(),
                               google::FlagSettingMode::SET_FLAGS_DEFAULT);
  SetCommandLineOptionWithMode("super_image", default_super_image.c_str(),
                               google::FlagSettingMode::SET_FLAGS_DEFAULT);
  SetCommandLineOptionWithMode("misc_image", default_misc_image.c_str(),
                               google::FlagSettingMode::SET_FLAGS_DEFAULT);
  SetCommandLineOptionWithMode("misc_info_txt", default_misc_info_txt.c_str(),
                               google::FlagSettingMode::SET_FLAGS_DEFAULT);
  SetCommandLineOptionWithMode("vendor_boot_image",
                               default_vendor_boot_image.c_str(),
                               google::FlagSettingMode::SET_FLAGS_DEFAULT);
  SetCommandLineOptionWithMode("vbmeta_image", default_vbmeta_image.c_str(),
                               google::FlagSettingMode::SET_FLAGS_DEFAULT);
  SetCommandLineOptionWithMode("vbmeta_system_image",
                               default_vbmeta_system_image.c_str(),
                               google::FlagSettingMode::SET_FLAGS_DEFAULT);
  SetCommandLineOptionWithMode("vbmeta_vendor_dlkm_image",
                               default_vbmeta_vendor_dlkm_image.c_str(),
                               google::FlagSettingMode::SET_FLAGS_DEFAULT);

  return {};
}

std::vector<ImagePartition> linux_composite_disk_config(
    const CuttlefishConfig::InstanceSpecific& instance) {
  std::vector<ImagePartition> partitions;

  partitions.push_back(ImagePartition{
      .label = "linux_esp",
      .image_file_path = AbsolutePath(instance.otheros_esp_image_path()),
      .type = kEfiSystemPartition,
      .read_only = FLAGS_use_overlay,
  });
  partitions.push_back(ImagePartition{
      .label = "linux_root",
      .image_file_path = AbsolutePath(instance.linux_root_image()),
      .read_only = FLAGS_use_overlay,
  });

  return partitions;
}

std::vector<ImagePartition> fuchsia_composite_disk_config(
    const CuttlefishConfig::InstanceSpecific& instance) {
  std::vector<ImagePartition> partitions;

  partitions.push_back(ImagePartition{
      .label = "fuchsia_esp",
      .image_file_path = AbsolutePath(instance.otheros_esp_image_path()),
      .type = kEfiSystemPartition,
      .read_only = FLAGS_use_overlay,
  });

  return partitions;
}

std::vector<ImagePartition> android_composite_disk_config(
    const CuttlefishConfig::InstanceSpecific& instance) {
  std::vector<ImagePartition> partitions;

  partitions.push_back(ImagePartition{
      .label = "misc",
      .image_file_path = AbsolutePath(instance.new_misc_image()),
      .read_only = FLAGS_use_overlay,
  });
  partitions.push_back(ImagePartition{
      .label = "boot_a",
      .image_file_path = AbsolutePath(instance.new_boot_image()),
      .read_only = FLAGS_use_overlay,
  });
  partitions.push_back(ImagePartition{
      .label = "boot_b",
      .image_file_path = AbsolutePath(instance.new_boot_image()),
      .read_only = FLAGS_use_overlay,
  });
  const auto init_boot_path = instance.init_boot_image();
  if (FileExists(init_boot_path)) {
    partitions.push_back(ImagePartition{
        .label = "init_boot_a",
        .image_file_path = AbsolutePath(init_boot_path),
        .read_only = FLAGS_use_overlay,
    });
    partitions.push_back(ImagePartition{
        .label = "init_boot_b",
        .image_file_path = AbsolutePath(init_boot_path),
        .read_only = FLAGS_use_overlay,
    });
  }
  partitions.push_back(ImagePartition{
      .label = "vendor_boot_a",
      .image_file_path = AbsolutePath(instance.new_vendor_boot_image()),
      .read_only = FLAGS_use_overlay,
  });
  partitions.push_back(ImagePartition{
      .label = "vendor_boot_b",
      .image_file_path = AbsolutePath(instance.new_vendor_boot_image()),
      .read_only = FLAGS_use_overlay,
  });
  partitions.push_back(ImagePartition{
      .label = "vbmeta_a",
      .image_file_path = AbsolutePath(instance.vbmeta_image()),
      .read_only = FLAGS_use_overlay,
  });
  partitions.push_back(ImagePartition{
      .label = "vbmeta_b",
      .image_file_path = AbsolutePath(instance.vbmeta_image()),
      .read_only = FLAGS_use_overlay,
  });
  partitions.push_back(ImagePartition{
      .label = "vbmeta_system_a",
      .image_file_path = AbsolutePath(instance.vbmeta_system_image()),
      .read_only = FLAGS_use_overlay,
  });
  partitions.push_back(ImagePartition{
      .label = "vbmeta_system_b",
      .image_file_path = AbsolutePath(instance.vbmeta_system_image()),
      .read_only = FLAGS_use_overlay,
  });
  auto vbmeta_vendor_dlkm_img = instance.new_vbmeta_vendor_dlkm_image();
  if (!FileExists(vbmeta_vendor_dlkm_img)) {
    vbmeta_vendor_dlkm_img = instance.vbmeta_vendor_dlkm_image();
  }
  if (FileExists(vbmeta_vendor_dlkm_img)) {
    partitions.push_back(ImagePartition{
        .label = "vbmeta_vendor_dlkm_a",
        .image_file_path = AbsolutePath(vbmeta_vendor_dlkm_img),
        .read_only = FLAGS_use_overlay,
    });
    partitions.push_back(ImagePartition{
        .label = "vbmeta_vendor_dlkm_b",
        .image_file_path = AbsolutePath(vbmeta_vendor_dlkm_img),
        .read_only = FLAGS_use_overlay,
    });
  }
  auto super_image = instance.new_super_image();
  if (!FileExists(super_image)) {
    super_image = instance.super_image();
  }
  partitions.push_back(ImagePartition{
      .label = "super",
      .image_file_path = AbsolutePath(super_image),
      .read_only = FLAGS_use_overlay,
  });
  partitions.push_back(ImagePartition{
      .label = "userdata",
      .image_file_path = AbsolutePath(instance.data_image()),
      .read_only = FLAGS_use_overlay,
  });
  partitions.push_back(ImagePartition{
      .label = "metadata",
      .image_file_path = AbsolutePath(instance.new_metadata_image()),
      .read_only = FLAGS_use_overlay,
  });
  const auto custom_partition_path = instance.custom_partition_path();
  if (!custom_partition_path.empty()) {
    partitions.push_back(ImagePartition{
        .label = "custom",
        .image_file_path = AbsolutePath(custom_partition_path),
        .read_only = FLAGS_use_overlay,
    });
  }

  return partitions;
}

std::vector<ImagePartition> GetApCompositeDiskConfig(const CuttlefishConfig& config,
    const CuttlefishConfig::InstanceSpecific& instance) {
  std::vector<ImagePartition> partitions;

  if (instance.ap_boot_flow() == APBootFlow::Grub) {
    partitions.push_back(ImagePartition{
        .label = "ap_esp",
        .image_file_path = AbsolutePath(instance.ap_esp_image_path()),
        .read_only = FLAGS_use_overlay,
    });
  }

  partitions.push_back(ImagePartition{
      .label = "ap_rootfs",
      .image_file_path = AbsolutePath(config.ap_rootfs_image()),
      .read_only = FLAGS_use_overlay,
  });

  return partitions;
}

std::vector<ImagePartition> GetOsCompositeDiskConfig(
    const CuttlefishConfig::InstanceSpecific& instance) {

  switch (instance.boot_flow()) {
    case CuttlefishConfig::InstanceSpecific::BootFlow::Android:
      return android_composite_disk_config(instance);
      break;
    case CuttlefishConfig::InstanceSpecific::BootFlow::Linux:
      return linux_composite_disk_config(instance);
      break;
    case CuttlefishConfig::InstanceSpecific::BootFlow::Fuchsia:
      return fuchsia_composite_disk_config(instance);
      break;
  }
}

DiskBuilder OsCompositeDiskBuilder(const CuttlefishConfig& config,
    const CuttlefishConfig::InstanceSpecific& instance) {
  return DiskBuilder()
      .Partitions(GetOsCompositeDiskConfig(instance))
      .VmManager(config.vm_manager())
      .CrosvmPath(instance.crosvm_binary())
      .ConfigPath(instance.PerInstancePath("os_composite_disk_config.txt"))
      .HeaderPath(instance.PerInstancePath("os_composite_gpt_header.img"))
      .FooterPath(instance.PerInstancePath("os_composite_gpt_footer.img"))
      .CompositeDiskPath(instance.os_composite_disk_path())
      .ResumeIfPossible(FLAGS_resume);
}

DiskBuilder ApCompositeDiskBuilder(const CuttlefishConfig& config,
    const CuttlefishConfig::InstanceSpecific& instance) {
  return DiskBuilder()
      .Partitions(GetApCompositeDiskConfig(config, instance))
      .VmManager(config.vm_manager())
      .CrosvmPath(instance.crosvm_binary())
      .ConfigPath(instance.PerInstancePath("ap_composite_disk_config.txt"))
      .HeaderPath(instance.PerInstancePath("ap_composite_gpt_header.img"))
      .FooterPath(instance.PerInstancePath("ap_composite_gpt_footer.img"))
      .CompositeDiskPath(instance.ap_composite_disk_path())
      .ResumeIfPossible(FLAGS_resume);
}

std::vector<ImagePartition> persistent_composite_disk_config(
    const CuttlefishConfig::InstanceSpecific& instance) {
  std::vector<ImagePartition> partitions;

  // Note that if the position of uboot_env changes, the environment for
  // u-boot must be updated as well (see boot_config.cc and
  // cuttlefish.fragment in external/u-boot).
  partitions.push_back(ImagePartition{
      .label = "uboot_env",
      .image_file_path = AbsolutePath(instance.uboot_env_image_path()),
  });
  partitions.push_back(ImagePartition{
      .label = "vbmeta",
      .image_file_path = AbsolutePath(instance.vbmeta_path()),
  });
  if (!instance.protected_vm()) {
    partitions.push_back(ImagePartition{
        .label = "frp",
        .image_file_path =
            AbsolutePath(instance.factory_reset_protected_path()),
    });
  }
  if (instance.bootconfig_supported()) {
    partitions.push_back(ImagePartition{
        .label = "bootconfig",
        .image_file_path = AbsolutePath(instance.persistent_bootconfig_path()),
    });
  }
  return partitions;
}

std::vector<ImagePartition> persistent_ap_composite_disk_config(
    const CuttlefishConfig::InstanceSpecific& instance) {
  std::vector<ImagePartition> partitions;

  // Note that if the position of uboot_env changes, the environment for
  // u-boot must be updated as well (see boot_config.cc and
  // cuttlefish.fragment in external/u-boot).
  partitions.push_back(ImagePartition{
      .label = "uboot_env",
      .image_file_path = AbsolutePath(instance.ap_uboot_env_image_path()),
  });
  partitions.push_back(ImagePartition{
      .label = "vbmeta",
      .image_file_path = AbsolutePath(instance.ap_vbmeta_path()),
  });

  return partitions;
}

static uint64_t AvailableSpaceAtPath(const std::string& path) {
  struct statvfs vfs {};
  if (statvfs(path.c_str(), &vfs) != 0) {
    int error_num = errno;
    LOG(ERROR) << "Could not find space available at " << path << ", error was "
               << strerror(error_num);
    return 0;
  }
  // f_frsize (block size) * f_bavail (free blocks) for unprivileged users.
  return static_cast<uint64_t>(vfs.f_frsize) * vfs.f_bavail;
}

class KernelRamdiskRepacker : public SetupFeature {
 public:
  INJECT(
      KernelRamdiskRepacker(const CuttlefishConfig& config,
                            const CuttlefishConfig::InstanceSpecific& instance))
      : config_(config), instance_(instance) {}

  // SetupFeature
  std::string Name() const override { return "KernelRamdiskRepacker"; }
  std::unordered_set<SetupFeature*> Dependencies() const override { return {}; }
  bool Enabled() const override {
    // If we are booting a protected VM, for now, assume that image repacking
    // isn't trusted. Repacking requires resigning the image and keys from an
    // android host aren't trusted.
    return !instance_.protected_vm();
  }

 protected:
  bool RepackVendorDLKM(const std::string& superimg_build_dir,
                        const std::string& vendor_dlkm_build_dir,
                        const std::string& ramdisk_path) {
    const auto new_vendor_dlkm_img =
        superimg_build_dir + "/vendor_dlkm_repacked.img";
    const auto tmp_vendor_dlkm_img = new_vendor_dlkm_img + ".tmp";
    if (!EnsureDirectoryExists(vendor_dlkm_build_dir).ok()) {
      LOG(ERROR) << "Failed to create directory " << vendor_dlkm_build_dir;
      return false;
    }
    const auto ramdisk_stage_dir = instance_.instance_dir() + "/ramdisk_staged";
    if (!SplitRamdiskModules(ramdisk_path, ramdisk_stage_dir,
                             vendor_dlkm_build_dir)) {
      LOG(ERROR) << "Failed to move ramdisk modules to vendor_dlkm";
      return false;
    }
    // TODO(b/149866755) For now, we assume that vendor_dlkm is ext4. Add
    // logic to handle EROFS once the feature stablizes.
    if (!BuildVendorDLKM(vendor_dlkm_build_dir, false, tmp_vendor_dlkm_img)) {
      LOG(ERROR) << "Failed to build vendor_dlkm image from "
                 << vendor_dlkm_build_dir;
      return false;
    }
    if (ReadFile(tmp_vendor_dlkm_img) == ReadFile(new_vendor_dlkm_img)) {
      LOG(INFO) << "vendor_dlkm unchanged, skip super image rebuilding.";
      return true;
    }
    if (!RenameFile(tmp_vendor_dlkm_img, new_vendor_dlkm_img).ok()) {
      return false;
    }
    const auto new_super_img = instance_.new_super_image();
    if (!Copy(instance_.super_image(), new_super_img)) {
      PLOG(ERROR) << "Failed to copy super image " << instance_.super_image()
                  << " to " << new_super_img;
      return false;
    }
    if (!RepackSuperWithVendorDLKM(new_super_img, new_vendor_dlkm_img)) {
      LOG(ERROR) << "Failed to repack super image with new vendor dlkm image.";
      return false;
    }
    if (!RebuildVbmetaVendor(new_vendor_dlkm_img,
                             instance_.new_vbmeta_vendor_dlkm_image())) {
      LOG(ERROR) << "Failed to rebuild vbmeta vendor.";
      return false;
    }
    SetCommandLineOptionWithMode("super_image", new_super_img.c_str(),
                                 google::FlagSettingMode::SET_FLAGS_DEFAULT);
    SetCommandLineOptionWithMode(
        "vbmeta_vendor_dlkm_image",
        instance_.new_vbmeta_vendor_dlkm_image().c_str(),
        google::FlagSettingMode::SET_FLAGS_DEFAULT);
    return true;
  }
  bool Setup() override {
    if (!FileHasContent(instance_.boot_image())) {
      LOG(ERROR) << "File not found: " << instance_.boot_image();
      return false;
    }
    // The init_boot partition is be optional for testing boot.img
    // with the ramdisk inside.
    if (!FileHasContent(instance_.init_boot_image())) {
      LOG(WARNING) << "File not found: " << instance_.init_boot_image();
    }

    if (!FileHasContent(instance_.vendor_boot_image())) {
      LOG(ERROR) << "File not found: " << instance_.vendor_boot_image();
      return false;
    }

    // Repacking a boot.img doesn't work with Gem5 because the user must always
    // specify a vmlinux instead of an arm64 Image, and that file can be too
    // large to be repacked. Skip repack of boot.img on Gem5, as we need to be
    // able to extract the ramdisk.img in a later stage and so this step must
    // not fail (..and the repacked kernel wouldn't be used anyway).
    if (instance_.kernel_path().size() &&
        config_.vm_manager() != Gem5Manager::name()) {
      const std::string new_boot_image_path = instance_.new_boot_image();
      bool success =
          RepackBootImage(instance_.kernel_path(), instance_.boot_image(),
                          new_boot_image_path, instance_.instance_dir());
      if (!success) {
        LOG(ERROR) << "Failed to regenerate the boot image with the new kernel";
        return false;
      }
      SetCommandLineOptionWithMode("boot_image", new_boot_image_path.c_str(),
                                   google::FlagSettingMode::SET_FLAGS_DEFAULT);
    }

    if (instance_.kernel_path().size() || instance_.initramfs_path().size()) {
      const std::string new_vendor_boot_image_path =
          instance_.new_vendor_boot_image();
      // Repack the vendor boot images if kernels and/or ramdisks are passed in.
      if (instance_.initramfs_path().size()) {
        const auto superimg_build_dir = instance_.instance_dir() + "/superimg";
        const auto ramdisk_repacked =
            instance_.instance_dir() + "/ramdisk_repacked";
        if (!Copy(instance_.initramfs_path(), ramdisk_repacked)) {
          LOG(ERROR) << "Failed to copy " << instance_.initramfs_path()
                     << " to " << ramdisk_repacked;
          return false;
        }
        const auto vendor_dlkm_build_dir = superimg_build_dir + "/vendor_dlkm";
        if (!RepackVendorDLKM(superimg_build_dir, vendor_dlkm_build_dir,
                              ramdisk_repacked)) {
          return false;
        }
        bool success = RepackVendorBootImage(
            ramdisk_repacked, instance_.vendor_boot_image(),
            new_vendor_boot_image_path, config_.assembly_dir(),
            instance_.bootconfig_supported());
        if (!success) {
          LOG(ERROR) << "Failed to regenerate the vendor boot image with the "
                        "new ramdisk";
        } else {
          // This control flow implies a kernel with all configs built in.
          // If it's just the kernel, repack the vendor boot image without a
          // ramdisk.
          bool success = RepackVendorBootImageWithEmptyRamdisk(
              instance_.vendor_boot_image(), new_vendor_boot_image_path,
              config_.assembly_dir(), instance_.bootconfig_supported());
          if (!success) {
            LOG(ERROR) << "Failed to regenerate the vendor boot image without "
                          "a ramdisk";
            return false;
          }
        }
        SetCommandLineOptionWithMode(
            "vendor_boot_image", new_vendor_boot_image_path.c_str(),
            google::FlagSettingMode::SET_FLAGS_DEFAULT);
      }
    }
    return true;
  }

 private:
  const CuttlefishConfig& config_;
  const CuttlefishConfig::InstanceSpecific& instance_;
};

class Gem5ImageUnpacker : public SetupFeature {
 public:
  INJECT(Gem5ImageUnpacker(const CuttlefishConfig& config,
                           KernelRamdiskRepacker& bir))
      : config_(config), bir_(bir) {}

  // SetupFeature
  std::string Name() const override { return "Gem5ImageUnpacker"; }

  std::unordered_set<SetupFeature*> Dependencies() const override {
    return {
        static_cast<SetupFeature*>(&bir_),
    };
  }

  bool Enabled() const override {
    // Everything has a bootloader except gem5, so only run this for gem5
    return config_.vm_manager() == Gem5Manager::name();
  }

 protected:
  Result<void> ResultSetup() override {
    const CuttlefishConfig::InstanceSpecific& instance_ =
        config_.ForDefaultInstance();

    /* Unpack the original or repacked boot and vendor boot ramdisks, so that
     * we have access to the baked bootconfig and raw compressed ramdisks.
     * This allows us to emulate what a bootloader would normally do, which
     * Gem5 can't support itself. This code also copies the kernel again
     * (because Gem5 only supports raw vmlinux) and handles the bootloader
     * binaries specially. This code is just part of the solution; it only
     * does the parts which are instance agnostic.
     */

    CF_EXPECT(FileHasContent(instance_.boot_image()), instance_.boot_image());

    const std::string unpack_dir = config_.assembly_dir();
    // The init_boot partition is be optional for testing boot.img
    // with the ramdisk inside.
    if (!FileHasContent(instance_.init_boot_image())) {
      LOG(WARNING) << "File not found: " << instance_.init_boot_image();
    } else {
      CF_EXPECT(UnpackBootImage(instance_.init_boot_image(), unpack_dir),
                "Failed to extract the init boot image");
    }

    CF_EXPECT(FileHasContent(instance_.vendor_boot_image()),
              instance_.vendor_boot_image());

    CF_EXPECT(UnpackVendorBootImageIfNotUnpacked(instance_.vendor_boot_image(),
                                                 unpack_dir),
              "Failed to extract the vendor boot image");

    // Assume the user specified a kernel manually which is a vmlinux
    CF_EXPECT(cuttlefish::Copy(instance_.kernel_path(), unpack_dir + "/kernel"));

    // Gem5 needs the bootloader binary to be a specific directory structure
    // to find it. Create a 'binaries' directory and copy it into there
    const std::string binaries_dir = unpack_dir + "/binaries";
    CF_EXPECT(mkdir(binaries_dir.c_str(),
                    S_IRWXU | S_IRWXG | S_IROTH | S_IXOTH) == 0 ||
                  errno == EEXIST,
              "\"" << binaries_dir << "\": " << strerror(errno));
    CF_EXPECT(cuttlefish::Copy(instance_.bootloader(),
        binaries_dir + "/" + cpp_basename(instance_.bootloader())));

    // Gem5 also needs the ARM version of the bootloader, even though it
    // doesn't use it. It'll even open it to check it's a valid ELF file.
    // Work around this by copying such a named file from the same directory
    CF_EXPECT(cuttlefish::Copy(
        cpp_dirname(instance_.bootloader()) + "/boot.arm",
        binaries_dir + "/boot.arm"));

    return {};
  }

 private:
  const CuttlefishConfig& config_;
  KernelRamdiskRepacker& bir_;
};

class GeneratePersistentBootconfig : public SetupFeature {
 public:
  INJECT(GeneratePersistentBootconfig(
      const CuttlefishConfig& config,
      const CuttlefishConfig::InstanceSpecific& instance))
      : config_(config), instance_(instance) {}

  // SetupFeature
  std::string Name() const override {
    return "GeneratePersistentBootconfig";
  }
  bool Enabled() const override {
    return (!instance_.protected_vm());
  }

 private:
  std::unordered_set<SetupFeature*> Dependencies() const override { return {}; }
  Result<void> ResultSetup() override {
    //  Cuttlefish for the time being won't be able to support OTA from a
    //  non-bootconfig kernel to a bootconfig-kernel (or vice versa) IF the
    //  device is stopped (via stop_cvd). This is rarely an issue since OTA
    //  testing run on cuttlefish is done within one launch cycle of the device.
    //  If this ever becomes an issue, this code will have to be rewritten.
    if(!instance_.bootconfig_supported()) {
      return {};
    }
    const auto bootconfig_path = instance_.persistent_bootconfig_path();
    if (!FileExists(bootconfig_path)) {
      CF_EXPECT(CreateBlankImage(bootconfig_path, 1 /* mb */, "none"),
                "Failed to create image at " << bootconfig_path);
    }

    auto bootconfig_fd = SharedFD::Open(bootconfig_path, O_RDWR);
    CF_EXPECT(bootconfig_fd->IsOpen(),
              "Unable to open bootconfig file: " << bootconfig_fd->StrError());

    const auto bootconfig_args =
        CF_EXPECT(BootconfigArgsFromConfig(config_, instance_));
    const auto bootconfig =
        CF_EXPECT(BootconfigArgsString(bootconfig_args, "\n")) + "\n";

    LOG(DEBUG) << "bootconfig size is " << bootconfig.size();
    ssize_t bytesWritten = WriteAll(bootconfig_fd, bootconfig);
    CF_EXPECT(WriteAll(bootconfig_fd, bootconfig) == bootconfig.size(),
              "Failed to write bootconfig to \"" << bootconfig_path << "\"");
    LOG(DEBUG) << "Bootconfig parameters from vendor boot image and config are "
               << ReadFile(bootconfig_path);

    CF_EXPECT(bootconfig_fd->Truncate(bootconfig.size()) == 0,
              "`truncate --size=" << bootconfig.size() << " bytes "
                                  << bootconfig_path
                                  << "` failed:" << bootconfig_fd->StrError());

    if (config_.vm_manager() == Gem5Manager::name()) {
      const off_t bootconfig_size_bytes_gem5 =
          AlignToPowerOf2(bytesWritten, PARTITION_SIZE_SHIFT);
      CF_EXPECT(bootconfig_fd->Truncate(bootconfig_size_bytes_gem5) == 0);
      bootconfig_fd->Close();
    } else {
      bootconfig_fd->Close();
      const off_t bootconfig_size_bytes = AlignToPowerOf2(
          MAX_AVB_METADATA_SIZE + bootconfig.size(), PARTITION_SIZE_SHIFT);

      auto avbtool_path = HostBinaryPath("avbtool");
      Command bootconfig_hash_footer_cmd(avbtool_path);
      bootconfig_hash_footer_cmd.AddParameter("add_hash_footer");
      bootconfig_hash_footer_cmd.AddParameter("--image");
      bootconfig_hash_footer_cmd.AddParameter(bootconfig_path);
      bootconfig_hash_footer_cmd.AddParameter("--partition_size");
      bootconfig_hash_footer_cmd.AddParameter(bootconfig_size_bytes);
      bootconfig_hash_footer_cmd.AddParameter("--partition_name");
      bootconfig_hash_footer_cmd.AddParameter("bootconfig");
      bootconfig_hash_footer_cmd.AddParameter("--key");
      bootconfig_hash_footer_cmd.AddParameter(
          DefaultHostArtifactsPath("etc/cvd_avb_testkey.pem"));
      bootconfig_hash_footer_cmd.AddParameter("--algorithm");
      bootconfig_hash_footer_cmd.AddParameter("SHA256_RSA4096");
      int success = bootconfig_hash_footer_cmd.Start().Wait();
      CF_EXPECT(
          success == 0,
          "Unable to run append hash footer. Exited with status " << success);
    }
    return {};
  }

  const CuttlefishConfig& config_;
  const CuttlefishConfig::InstanceSpecific& instance_;
};

class GeneratePersistentVbmeta : public SetupFeature {
 public:
  INJECT(GeneratePersistentVbmeta(
      const CuttlefishConfig::InstanceSpecific& instance,
      InitBootloaderEnvPartition& bootloader_env,
      GeneratePersistentBootconfig& bootconfig))
      : instance_(instance),
        bootloader_env_(bootloader_env),
        bootconfig_(bootconfig) {}

  // SetupFeature
  std::string Name() const override {
    return "GeneratePersistentVbmeta";
  }
  bool Enabled() const override {
    return true;
  }

 private:
  std::unordered_set<SetupFeature*> Dependencies() const override {
    return {
        static_cast<SetupFeature*>(&bootloader_env_),
        static_cast<SetupFeature*>(&bootconfig_),
    };
  }

  bool Setup() override {
    if (!instance_.protected_vm()) {
      if (!PrepareVBMetaImage(instance_.vbmeta_path(), instance_.bootconfig_supported())) {
        return false;
      }
    }

    if (instance_.ap_boot_flow() == APBootFlow::Grub) {
      if (!PrepareVBMetaImage(instance_.ap_vbmeta_path(), false)) {
        return false;
      }
    }

    return true;
  }

  bool PrepareVBMetaImage(const std::string& path, bool has_boot_config) {
    auto avbtool_path = HostBinaryPath("avbtool");
    Command vbmeta_cmd(avbtool_path);
    vbmeta_cmd.AddParameter("make_vbmeta_image");
    vbmeta_cmd.AddParameter("--output");
    vbmeta_cmd.AddParameter(path);
    vbmeta_cmd.AddParameter("--algorithm");
    vbmeta_cmd.AddParameter("SHA256_RSA4096");
    vbmeta_cmd.AddParameter("--key");
    vbmeta_cmd.AddParameter(
        DefaultHostArtifactsPath("etc/cvd_avb_testkey.pem"));

    vbmeta_cmd.AddParameter("--chain_partition");
    vbmeta_cmd.AddParameter("uboot_env:1:" +
                            DefaultHostArtifactsPath("etc/cvd.avbpubkey"));

    if (has_boot_config) {
        vbmeta_cmd.AddParameter("--chain_partition");
        vbmeta_cmd.AddParameter("bootconfig:2:" +
                                DefaultHostArtifactsPath("etc/cvd.avbpubkey"));
    }

    bool success = vbmeta_cmd.Start().Wait();
    if (success != 0) {
      LOG(ERROR) << "Unable to create persistent vbmeta. Exited with status "
                 << success;
      return false;
    }

    const auto vbmeta_size = FileSize(path);
    if (vbmeta_size > VBMETA_MAX_SIZE) {
      LOG(ERROR) << "Generated vbmeta - " << path
                 << " is larger than the expected " << VBMETA_MAX_SIZE
                 << ". Stopping.";
      return false;
    }
    if (vbmeta_size != VBMETA_MAX_SIZE) {
      auto fd = SharedFD::Open(path, O_RDWR);
      if (!fd->IsOpen() || fd->Truncate(VBMETA_MAX_SIZE) != 0) {
        LOG(ERROR) << "`truncate --size=" << VBMETA_MAX_SIZE << " "
                   << path << "` failed: " << fd->StrError();
        return false;
      }
    }
    return true;
  }

  const CuttlefishConfig::InstanceSpecific& instance_;
  InitBootloaderEnvPartition& bootloader_env_;
  GeneratePersistentBootconfig& bootconfig_;
};

class InitializeMetadataImage : public SetupFeature {
 public:
  INJECT(InitializeMetadataImage(
      const CuttlefishConfig::InstanceSpecific& instance))
      : instance_(instance) {}

  // SetupFeature
  std::string Name() const override { return "InitializeMetadataImage"; }
  bool Enabled() const override { return true; }

 private:
  std::unordered_set<SetupFeature*> Dependencies() const override { return {}; }
  Result<void> ResultSetup() override {
    if (FileExists(instance_.metadata_image()) &&
        FileSize(instance_.metadata_image()) == instance_.blank_metadata_image_mb() << 20) {
      return {};
    }

    CF_EXPECT(CreateBlankImage(instance_.new_metadata_image(),
                               instance_.blank_metadata_image_mb(), "none"),
              "Failed to create \"" << instance_.new_metadata_image()
                                    << "\" with size "
                                    << instance_.blank_metadata_image_mb());
    return {};
  }
  const CuttlefishConfig::InstanceSpecific& instance_;
};

class InitializeAccessKregistryImage : public SetupFeature {
 public:
  INJECT(InitializeAccessKregistryImage(
      const CuttlefishConfig::InstanceSpecific& instance))
      : instance_(instance) {}

  // SetupFeature
  std::string Name() const override { return "InitializeAccessKregistryImage"; }
  bool Enabled() const override { return !instance_.protected_vm(); }

 private:
  std::unordered_set<SetupFeature*> Dependencies() const override { return {}; }
  Result<void> ResultSetup() override {
    auto access_kregistry = instance_.access_kregistry_path();
    if (FileExists(access_kregistry)) {
      return {};
    }
    CF_EXPECT(CreateBlankImage(access_kregistry, 2 /* mb */, "none"),
              "Failed to create \"" << access_kregistry << "\"");
    return {};
  }

  const CuttlefishConfig::InstanceSpecific& instance_;
};

class InitializeHwcomposerPmemImage : public SetupFeature {
 public:
  INJECT(InitializeHwcomposerPmemImage(
      const CuttlefishConfig::InstanceSpecific& instance))
      : instance_(instance) {}

  // SetupFeature
  std::string Name() const override { return "InitializeHwcomposerPmemImage"; }
  bool Enabled() const override {
    return instance_.hwcomposer() != kHwComposerNone &&
           !instance_.protected_vm();
  }

 private:
  std::unordered_set<SetupFeature*> Dependencies() const override { return {}; }
  Result<void> ResultSetup() override {
    if (FileExists(instance_.hwcomposer_pmem_path())) {
      return {};
    }
    CF_EXPECT(
        CreateBlankImage(instance_.hwcomposer_pmem_path(), 2 /* mb */, "none"),
        "Failed creating \"" << instance_.hwcomposer_pmem_path() << "\"");
    return {};
  }

  const CuttlefishConfig::InstanceSpecific& instance_;
};

class InitializePstore : public SetupFeature {
 public:
  INJECT(InitializePstore(const CuttlefishConfig::InstanceSpecific& instance))
      : instance_(instance) {}

  // SetupFeature
  std::string Name() const override { return "InitializePstore"; }
  bool Enabled() const override { return !instance_.protected_vm(); }

 private:
  std::unordered_set<SetupFeature*> Dependencies() const override { return {}; }
  Result<void> ResultSetup() override {
    if (FileExists(instance_.pstore_path())) {
      return {};
    }

    CF_EXPECT(CreateBlankImage(instance_.pstore_path(), 2 /* mb */, "none"),
              "Failed to create \"" << instance_.pstore_path() << "\"");
    return {};
  }

  const CuttlefishConfig::InstanceSpecific& instance_;
};

class InitializeSdCard : public SetupFeature {
 public:
  INJECT(InitializeSdCard(const CuttlefishConfig::InstanceSpecific& instance))
      : instance_(instance) {}

  // SetupFeature
  std::string Name() const override { return "InitializeSdCard"; }
  bool Enabled() const override {
    return instance_.use_sdcard() && !instance_.protected_vm();
  }

 private:
  std::unordered_set<SetupFeature*> Dependencies() const override { return {}; }
  Result<void> ResultSetup() override {
    if (FileExists(instance_.sdcard_path())) {
      return {};
    }
    CF_EXPECT(CreateBlankImage(instance_.sdcard_path(),
                               instance_.blank_sdcard_image_mb(), "sdcard"),
              "Failed to create \"" << instance_.sdcard_path() << "\"");
    return {};
  }

  const CuttlefishConfig::InstanceSpecific& instance_;
};

class InitializeFactoryResetProtected : public SetupFeature {
 public:
  INJECT(InitializeFactoryResetProtected(
      const CuttlefishConfig::InstanceSpecific& instance))
      : instance_(instance) {}

  // SetupFeature
  std::string Name() const override { return "InitializeSdCard"; }
  bool Enabled() const override { return !instance_.protected_vm(); }

 private:
  std::unordered_set<SetupFeature*> Dependencies() const override { return {}; }
  Result<void> ResultSetup() override {
    auto frp = instance_.factory_reset_protected_path();
    if (FileExists(frp)) {
      return {};
    }
    CF_EXPECT(CreateBlankImage(frp, 1 /* mb */, "none"),
              "Failed to create \"" << frp << "\"");
    return {};
  }

  const CuttlefishConfig::InstanceSpecific& instance_;
};

class InitializeInstanceCompositeDisk : public SetupFeature {
 public:
  INJECT(InitializeInstanceCompositeDisk(
      const CuttlefishConfig& config,
      const CuttlefishConfig::InstanceSpecific& instance,
      InitializeFactoryResetProtected& frp,
      GeneratePersistentVbmeta& vbmeta))
      : config_(config),
        instance_(instance),
        frp_(frp),
        vbmeta_(vbmeta) {}

  std::string Name() const override {
    return "InitializeInstanceCompositeDisk";
  }
  bool Enabled() const override { return true; }

 private:
  std::unordered_set<SetupFeature*> Dependencies() const override {
    return {
        static_cast<SetupFeature*>(&frp_),
        static_cast<SetupFeature*>(&vbmeta_),
    };
  }
  Result<void> ResultSetup() override {
    const auto ipath = [this](const std::string& path) -> std::string {
      return instance_.PerInstancePath(path.c_str());
    };
    auto persistent_disk_builder =
        DiskBuilder()
            .Partitions(persistent_composite_disk_config(instance_))
            .VmManager(config_.vm_manager())
            .CrosvmPath(instance_.crosvm_binary())
            .ConfigPath(ipath("persistent_composite_disk_config.txt"))
            .HeaderPath(ipath("persistent_composite_gpt_header.img"))
            .FooterPath(ipath("persistent_composite_gpt_footer.img"))
            .CompositeDiskPath(instance_.persistent_composite_disk_path())
            .ResumeIfPossible(FLAGS_resume);
    CF_EXPECT(persistent_disk_builder.BuildCompositeDiskIfNecessary());

    if (instance_.ap_boot_flow() == APBootFlow::Grub) {
      auto persistent_ap_disk_builder =
        DiskBuilder()
            .Partitions(persistent_ap_composite_disk_config(instance_))
            .VmManager(config_.vm_manager())
            .CrosvmPath(instance_.crosvm_binary())
            .ConfigPath(ipath("ap_persistent_composite_disk_config.txt"))
            .HeaderPath(ipath("ap_persistent_composite_gpt_header.img"))
            .FooterPath(ipath("ap_persistent_composite_gpt_footer.img"))
            .CompositeDiskPath(instance_.persistent_ap_composite_disk_path())
            .ResumeIfPossible(FLAGS_resume);
      CF_EXPECT(persistent_ap_disk_builder.BuildCompositeDiskIfNecessary());
    }

    return {};
  }

  const CuttlefishConfig& config_;
  const CuttlefishConfig::InstanceSpecific& instance_;
  InitializeFactoryResetProtected& frp_;
  GeneratePersistentVbmeta& vbmeta_;
};

class VbmetaEnforceMinimumSize : public SetupFeature {
 public:
  INJECT(VbmetaEnforceMinimumSize(
      const CuttlefishConfig::InstanceSpecific& instance))
      : instance_(instance) {}

  std::string Name() const override { return "VbmetaEnforceMinimumSize"; }
  bool Enabled() const override { return true; }

 private:
  std::unordered_set<SetupFeature*> Dependencies() const override { return {}; }
  Result<void> ResultSetup() override {
    // libavb expects to be able to read the maximum vbmeta size, so we must
    // provide a partition which matches this or the read will fail
    for (const auto& vbmeta_image :
         {instance_.vbmeta_image(), instance_.vbmeta_system_image(),
          instance_.vbmeta_vendor_dlkm_image()}) {
      // In some configurations of cuttlefish, the vendor dlkm vbmeta image does
      // not exist
      if (FileExists(vbmeta_image) && FileSize(vbmeta_image) != VBMETA_MAX_SIZE) {
        auto fd = SharedFD::Open(vbmeta_image, O_RDWR);
        CF_EXPECT(fd->IsOpen(), "Could not open \"" << vbmeta_image << "\": "
                                                    << fd->StrError());
        CF_EXPECT(fd->Truncate(VBMETA_MAX_SIZE) == 0,
                  "`truncate --size=" << VBMETA_MAX_SIZE << " " << vbmeta_image
                                      << "` failed: " << fd->StrError());
      }
    }
    return {};
  }

  const CuttlefishConfig::InstanceSpecific& instance_;
};

class BootloaderPresentCheck : public SetupFeature {
 public:
  INJECT(BootloaderPresentCheck(
      const CuttlefishConfig::InstanceSpecific& instance))
      : instance_(instance) {}

  std::string Name() const override { return "BootloaderPresentCheck"; }
  bool Enabled() const override { return true; }

 private:
  std::unordered_set<SetupFeature*> Dependencies() const override { return {}; }
  Result<void> ResultSetup() override {
    CF_EXPECT(FileHasContent(instance_.bootloader()),
              "File not found: " << instance_.bootloader());
    return {};
  }

  const CuttlefishConfig::InstanceSpecific& instance_;
};

static fruit::Component<> DiskChangesComponent(
    const FetcherConfig* fetcher, const CuttlefishConfig* config,
    const CuttlefishConfig::InstanceSpecific* instance) {
  return fruit::createComponent()
      .bindInstance(*fetcher)
      .bindInstance(*config)
      .bindInstance(*instance)
      .addMultibinding<SetupFeature, InitializeMetadataImage>()
      .addMultibinding<SetupFeature, KernelRamdiskRepacker>()
      .addMultibinding<SetupFeature, VbmetaEnforceMinimumSize>()
      .addMultibinding<SetupFeature, BootloaderPresentCheck>()
      .addMultibinding<SetupFeature, Gem5ImageUnpacker>()
      .install(InitializeMiscImageComponent)
      // Create esp if necessary
      .install(InitializeEspImageComponent)
      .install(SuperImageRebuilderComponent);
}

static fruit::Component<> DiskChangesPerInstanceComponent(
    const FetcherConfig* fetcher, const CuttlefishConfig* config,
    const CuttlefishConfig::InstanceSpecific* instance) {
  return fruit::createComponent()
      .bindInstance(*fetcher)
      .bindInstance(*config)
      .bindInstance(*instance)
      .addMultibinding<SetupFeature, InitializeAccessKregistryImage>()
      .addMultibinding<SetupFeature, InitializeHwcomposerPmemImage>()
      .addMultibinding<SetupFeature, InitializePstore>()
      .addMultibinding<SetupFeature, InitializeSdCard>()
      .addMultibinding<SetupFeature, InitializeFactoryResetProtected>()
      .addMultibinding<SetupFeature, GeneratePersistentBootconfig>()
      .addMultibinding<SetupFeature, GeneratePersistentVbmeta>()
      .addMultibinding<SetupFeature, InitializeInstanceCompositeDisk>()
      .install(InitializeDataImageComponent)
      .install(InitBootloaderEnvPartitionComponent);
}

Result<void> DiskImageFlagsVectorization(CuttlefishConfig& config, const FetcherConfig& fetcher_config) {
  std::vector<std::string> boot_image =
      android::base::Split(FLAGS_boot_image, ",");
  std::vector<std::string> init_boot_image =
      android::base::Split(FLAGS_init_boot_image, ",");
  std::vector<std::string> data_image =
      android::base::Split(FLAGS_data_image, ",");
  std::vector<std::string> super_image =
      android::base::Split(FLAGS_super_image, ",");
  std::vector<std::string> misc_image =
      android::base::Split(FLAGS_misc_image, ",");
  std::vector<std::string> misc_info =
      android::base::Split(FLAGS_misc_info_txt, ",");
  std::vector<std::string> metadata_image =
      android::base::Split(FLAGS_metadata_image, ",");
  std::vector<std::string> vendor_boot_image =
      android::base::Split(FLAGS_vendor_boot_image, ",");
  std::vector<std::string> vbmeta_image =
      android::base::Split(FLAGS_vbmeta_image, ",");
  std::vector<std::string> vbmeta_system_image =
      android::base::Split(FLAGS_vbmeta_system_image, ",");
  auto vbmeta_vendor_dlkm_image =
      android::base::Split(FLAGS_vbmeta_vendor_dlkm_image, ",");

  std::vector<std::string> linux_kernel_path =
      android::base::Split(FLAGS_linux_kernel_path, ",");
  std::vector<std::string> linux_initramfs_path =
      android::base::Split(FLAGS_linux_initramfs_path, ",");
  std::vector<std::string> linux_root_image =
      android::base::Split(FLAGS_linux_root_image, ",");

  std::vector<std::string> fuchsia_zedboot_path =
      android::base::Split(FLAGS_fuchsia_zedboot_path, ",");
  std::vector<std::string> fuchsia_multiboot_bin_path =
      android::base::Split(FLAGS_fuchsia_multiboot_bin_path, ",");
  std::vector<std::string> fuchsia_root_image =
      android::base::Split(FLAGS_fuchsia_root_image, ",");

  std::vector<std::string> custom_partition_path =
      android::base::Split(FLAGS_custom_partition_path, ",");

  std::vector<std::string> bootloader =
      android::base::Split(FLAGS_bootloader, ",");
  std::vector<std::string> initramfs_path =
      android::base::Split(FLAGS_initramfs_path, ",");
  std::vector<std::string> kernel_path =
      android::base::Split(FLAGS_kernel_path, ",");

  std::vector<std::string> blank_metadata_image_mb =
      android::base::Split(FLAGS_blank_metadata_image_mb, ",");
  std::vector<std::string> blank_sdcard_image_mb =
      android::base::Split(FLAGS_blank_sdcard_image_mb, ",");

  std::string cur_kernel_path;
  std::string cur_initramfs_path;
  std::string cur_boot_image;
  std::string cur_vendor_boot_image;
  std::string cur_super_image;
  std::string cur_metadata_image;
  std::string cur_misc_image;
  int cur_blank_metadata_image_mb{};
  int value{};
  int instance_index = 0;
  auto instance_nums =
      CF_EXPECT(InstanceNumsCalculator().FromGlobalGflags().Calculate());
  for (const auto& num : instance_nums) {
    auto instance = config.ForInstance(num);
    if (instance_index >= misc_image.size()) {
      // legacy variable. Vectorize by copy [0] to all instances
      cur_misc_image = misc_image[0];
    } else {
      cur_misc_image = misc_image[instance_index];
    }
    instance.set_misc_image(cur_misc_image);
    if (instance_index >= misc_info.size()) {
      instance.set_misc_info_txt(misc_info[0]);
    } else {
      instance.set_misc_info_txt(misc_info[instance_index]);
    }
    if (instance_index >= boot_image.size()) {
      cur_boot_image = boot_image[0];
    } else {
      cur_boot_image = boot_image[instance_index];
    }
    instance.set_boot_image(cur_boot_image);
    instance.set_new_boot_image(cur_boot_image);

    if (instance_index >= init_boot_image.size()) {
      instance.set_init_boot_image(init_boot_image[0]);
    } else {
      instance.set_init_boot_image(init_boot_image[instance_index]);
    }
    if (instance_index >= vendor_boot_image.size()) {
      cur_vendor_boot_image = vendor_boot_image[0];
    } else {
      cur_vendor_boot_image = vendor_boot_image[instance_index];
    }
    instance.set_vendor_boot_image(cur_vendor_boot_image);
    instance.set_new_vendor_boot_image(cur_vendor_boot_image);

    if (instance_index >= vbmeta_image.size()) {
      instance.set_vbmeta_image(vbmeta_image[0]);
    } else {
      instance.set_vbmeta_image(vbmeta_image[instance_index]);
    }
    if (instance_index >= vbmeta_system_image.size()) {
      instance.set_vbmeta_system_image(vbmeta_system_image[0]);
    } else {
      instance.set_vbmeta_system_image(vbmeta_system_image[instance_index]);
    }
    if (instance_index >= vbmeta_system_image.size()) {
      instance.set_vbmeta_vendor_dlkm_image(vbmeta_vendor_dlkm_image[0]);
    } else {
      instance.set_vbmeta_vendor_dlkm_image(
          vbmeta_vendor_dlkm_image[instance_index]);
    }
    if (instance_index >= super_image.size()) {
      cur_super_image = super_image[0];
    } else {
      cur_super_image = super_image[instance_index];
    }
    instance.set_super_image(cur_super_image);
    if (instance_index >= data_image.size()) {
      instance.set_data_image(data_image[0]);
    } else {
      instance.set_data_image(data_image[instance_index]);
    }
    if (instance_index >= metadata_image.size()) {
      cur_metadata_image = metadata_image[0];
    } else {
      cur_metadata_image = metadata_image[instance_index];
    }
    instance.set_metadata_image(cur_metadata_image);
    if (instance_index >= linux_kernel_path.size()) {
      instance.set_linux_kernel_path(linux_kernel_path[0]);
    } else {
      instance.set_linux_kernel_path(linux_kernel_path[instance_index]);
    }
    if (instance_index >= linux_initramfs_path.size()) {
      instance.set_linux_initramfs_path(linux_initramfs_path[0]);
    } else {
      instance.set_linux_initramfs_path(linux_initramfs_path[instance_index]);
    }
    if (instance_index >= linux_root_image.size()) {
      instance.set_linux_root_image(linux_root_image[0]);
    } else {
      instance.set_linux_root_image(linux_root_image[instance_index]);
    }
    if (instance_index >= fuchsia_zedboot_path.size()) {
      instance.set_fuchsia_zedboot_path(fuchsia_zedboot_path[0]);
    } else {
      instance.set_fuchsia_zedboot_path(fuchsia_zedboot_path[instance_index]);
    }
    if (instance_index >= fuchsia_multiboot_bin_path.size()) {
      instance.set_fuchsia_multiboot_bin_path(fuchsia_multiboot_bin_path[0]);
    } else {
      instance.set_fuchsia_multiboot_bin_path(fuchsia_multiboot_bin_path[instance_index]);
    }
    if (instance_index >= fuchsia_root_image.size()) {
      instance.set_fuchsia_root_image(fuchsia_root_image[0]);
    } else {
      instance.set_fuchsia_root_image(fuchsia_root_image[instance_index]);
    }
    if (instance_index >= custom_partition_path.size()) {
      instance.set_custom_partition_path(custom_partition_path[0]);
    } else {
      instance.set_custom_partition_path(custom_partition_path[instance_index]);
    }
    if (instance_index >= bootloader.size()) {
      instance.set_bootloader(bootloader[0]);
    } else {
      instance.set_bootloader(bootloader[instance_index]);
    }
    if (instance_index >= kernel_path.size()) {
      cur_kernel_path = kernel_path[0];
    } else {
      cur_kernel_path = kernel_path[instance_index];
    }
    instance.set_kernel_path(cur_kernel_path);
    if (instance_index >= initramfs_path.size()) {
      cur_initramfs_path = initramfs_path[0];
    } else {
      cur_initramfs_path = initramfs_path[instance_index];
    }
    instance.set_initramfs_path(cur_initramfs_path);

    if (instance_index >= blank_metadata_image_mb.size()) {
      CHECK(android::base::ParseInt(blank_metadata_image_mb[0],
                                    &value))
          << "Invalid 'blank_metadata_image_mb' "
          << blank_metadata_image_mb[0];
    } else {
      CHECK(android::base::ParseInt(blank_metadata_image_mb[instance_index],
                                    &value))
          << "Invalid 'blank_metadata_image_mb' "
          << blank_metadata_image_mb[instance_index];
    }
    instance.set_blank_metadata_image_mb(value);
    cur_blank_metadata_image_mb = value;

    if (instance_index >= blank_sdcard_image_mb.size()) {
      CHECK(android::base::ParseInt(blank_sdcard_image_mb[0],
                                    &value))
          << "Invalid 'blank_sdcard_image_mb' "
          << blank_sdcard_image_mb[0];
    } else {
      CHECK(android::base::ParseInt(blank_sdcard_image_mb[instance_index],
                                    &value))
          << "Invalid 'blank_sdcard_image_mb' "
          << blank_sdcard_image_mb[instance_index];
    }
    instance.set_blank_sdcard_image_mb(value);

    // Repacking a boot.img changes boot_image and vendor_boot_image paths
    const CuttlefishConfig& const_config = const_cast<const CuttlefishConfig&>(config);
    const CuttlefishConfig::InstanceSpecific const_instance = const_config.ForInstance(num);
    if (cur_kernel_path.size() &&
        config.vm_manager() != Gem5Manager::name()) {
      const std::string new_boot_image_path =
          const_instance.PerInstancePath("boot_repacked.img");
      // change the new flag value to corresponding instance
      instance.set_new_boot_image(new_boot_image_path.c_str());
    }

    if (cur_kernel_path.size() || cur_initramfs_path.size()) {
      const std::string new_vendor_boot_image_path =
          const_instance.PerInstancePath("vendor_boot_repacked.img");
      // Repack the vendor boot images if kernels and/or ramdisks are passed in.
      if (cur_initramfs_path.size()) {
        // change the new flag value to corresponding instance
        instance.set_new_vendor_boot_image(new_vendor_boot_image_path.c_str());
      }
    }

    // We will need to rebuild vendor_dlkm if custom ramdisk is specified, as a
    // result super image would need to be rebuilt as well.
    if (SuperImageNeedsRebuilding(fetcher_config) ||
        cur_initramfs_path.size()) {
      const std::string new_super_image_path =
          const_instance.PerInstancePath("super.img");
      instance.set_new_super_image(new_super_image_path);
    }

    if (FileExists(cur_metadata_image) &&
        FileSize(cur_metadata_image) == cur_blank_metadata_image_mb << 20) {
      instance.set_new_metadata_image(cur_metadata_image);
    } else {
      const std::string new_metadata_image_path =
          const_instance.PerInstancePath("metadata.img");
      instance.set_new_metadata_image(new_metadata_image_path);
    }
    instance.set_new_vbmeta_vendor_dlkm_image(
        const_instance.PerInstancePath("vbmeta_vendor_dlkm_repacked.img"));

    if (FileHasContent(cur_misc_image)) {
      instance.set_new_misc_image(cur_misc_image);
    } else {
      const std::string new_misc_image_path =
          const_instance.PerInstancePath("misc.img");
      instance.set_new_misc_image(new_misc_image_path);
    }
    instance_index++;
  }
  return {};
}

Result<void> CreateDynamicDiskFiles(const FetcherConfig& fetcher_config,
                                    const CuttlefishConfig& config) {
  for (const auto& instance : config.Instances()) {
    // TODO(schuffelen): Unify this with the other injector created in
    // assemble_cvd.cpp
    fruit::Injector<> injector(DiskChangesComponent, &fetcher_config, &config,
                               &instance);
    for (auto& late_injected : injector.getMultibindings<LateInjected>()) {
      CF_EXPECT(late_injected->LateInject(injector));
    }

    const auto& features = injector.getMultibindings<SetupFeature>();
    CF_EXPECT(SetupFeature::RunSetup(features));
    fruit::Injector<> instance_injector(DiskChangesPerInstanceComponent,
                                        &fetcher_config, &config, &instance);
    for (auto& late_injected :
         instance_injector.getMultibindings<LateInjected>()) {
      CF_EXPECT(late_injected->LateInject(instance_injector));
    }

    const auto& instance_features =
        instance_injector.getMultibindings<SetupFeature>();
    CF_EXPECT(SetupFeature::RunSetup(instance_features),
              "instance = \"" << instance.instance_name() << "\"");

    // Check if filling in the sparse image would run out of disk space.
    auto existing_sizes = SparseFileSizes(instance.data_image());
    CF_EXPECT(existing_sizes.sparse_size > 0 || existing_sizes.disk_size > 0,
              "Unable to determine size of \"" << instance.data_image()
                                               << "\". Does this file exist?");
    auto available_space = AvailableSpaceAtPath(instance.data_image());
    if (available_space <
        existing_sizes.sparse_size - existing_sizes.disk_size) {
      // TODO(schuffelen): Duplicate this check in run_cvd when it can run on a
      // separate machine
      return CF_ERR("Not enough space remaining in fs containing \""
                    << instance.data_image() << "\", wanted "
                    << (existing_sizes.sparse_size - existing_sizes.disk_size)
                    << ", got " << available_space);
    } else {
      LOG(DEBUG) << "Available space: " << available_space;
      LOG(DEBUG) << "Sparse size of \"" << instance.data_image()
                 << "\": " << existing_sizes.sparse_size;
      LOG(DEBUG) << "Disk size of \"" << instance.data_image()
                 << "\": " << existing_sizes.disk_size;
    }

    auto os_disk_builder = OsCompositeDiskBuilder(config, instance);
    const auto os_built_composite = CF_EXPECT(os_disk_builder.BuildCompositeDiskIfNecessary());

    auto ap_disk_builder = ApCompositeDiskBuilder(config, instance);
    if (instance.ap_boot_flow() != APBootFlow::None) {
      CF_EXPECT(ap_disk_builder.BuildCompositeDiskIfNecessary());
    }

    if (os_built_composite) {
      if (FileExists(instance.access_kregistry_path())) {
        CF_EXPECT(CreateBlankImage(instance.access_kregistry_path(), 2 /* mb */,
                                   "none"),
                  "Failed for \"" << instance.access_kregistry_path() << "\"");
      }
      if (FileExists(instance.hwcomposer_pmem_path())) {
        CF_EXPECT(CreateBlankImage(instance.hwcomposer_pmem_path(), 2 /* mb */,
                                   "none"),
                  "Failed for \"" << instance.hwcomposer_pmem_path() << "\"");
      }
      if (FileExists(instance.pstore_path())) {
        CF_EXPECT(CreateBlankImage(instance.pstore_path(), 2 /* mb */, "none"),
                  "Failed for\"" << instance.pstore_path() << "\"");
      }
    }

    if (!instance.protected_vm()) {
      os_disk_builder.OverlayPath(instance.PerInstancePath("overlay.img"));
      CF_EXPECT(os_disk_builder.BuildOverlayIfNecessary());
      if (instance.ap_boot_flow() != APBootFlow::None) {
        ap_disk_builder.OverlayPath(instance.PerInstancePath("ap_overlay.img"));
        CF_EXPECT(ap_disk_builder.BuildOverlayIfNecessary());
      }
    }
  }

  for (auto instance : config.Instances()) {
    // Check that the files exist
    for (const auto& file : instance.virtual_disk_paths()) {
      if (!file.empty()) {
        CF_EXPECT(FileHasContent(file), "File not found: \"" << file << "\"");
      }
    }
    // Gem5 Simulate per-instance what the bootloader would usually do
    // Since on other devices this runs every time, just do it here every time
    if (config.vm_manager() == Gem5Manager::name()) {
      RepackGem5BootImage(instance.PerInstancePath("initrd.img"),
                          instance.persistent_bootconfig_path(),
                          config.assembly_dir(), instance.initramfs_path());
    }
  }

  return {};
}

} // namespace cuttlefish