You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: helpers.go
    path of file: ./repos/octant/vendor/github.com/Microsoft/hcsshim/computestorage
    
    the code of the file until where you have to start completion: package computestorage

import (
	"context"
	"os"
	"path/filepath"
	"syscall"

	"github.com/Microsoft/go-winio/pkg/security"
	"github.com/Microsoft/go-winio/vhd"
	"github.com/pkg/errors"
	"golang.org/x/sys/windows"
)

const defaultVHDXBlockSizeInMB = 1

// SetupContainerBaseLayer is a helper to setup a containers scratch. It
// will create and format the vhdx's inside and the size is configurable with the sizeInGB
// parameter.
//
// `layerPath` is the path to the base container layer on disk.
//
// `baseVhdPath` is the path to where the base vhdx for the base layer should be created.
//
// `diffVhdPath` is the path where the differencing disk for the base layer should be created.
//
// `sizeInGB` is the size in gigabytes to make the base vhdx.
func SetupContainerBaseLayer(ctx context.Context, layerPath, baseVhdPath, diffVhdPath string, sizeInGB uint64) (err error) {
	var (
		hivesPath  = filepath.Join(layerPath, "Hives")
		layoutPath = filepath.Join(layerPath, "Layout")
	)

	// We need to remove the hives directory and layout file as `SetupBaseOSLayer` fails if these files
	// already exist. `SetupBaseOSLayer` will create these files internally. We also remove the base and
	// differencing disks if they exist in case we're asking for a different size.
	if _, err := os.Stat(hivesPath); err == nil {
		if err := os.RemoveAll(hivesPath); err != nil {
			return errors.Wrap(err, "failed to remove prexisting hives directory")
		}
	}
	if _, err := os.Stat(layoutPath); err == nil {
		if err := os.RemoveAll(layoutPath); err != nil {
			return errors.Wrap(err, "failed to remove prexisting layout file")
		}
	}

	if _, err := os.Stat(baseVhdPath); err == nil {
		if err := os.RemoveAll(baseVhdPath); err != nil {
			return errors.Wrap(err, "failed to
    
func SetupContainerBaseLayer(ctx context.Context, layerPath, baseVhdPath, diffVhdPath string, sizeInGB uint64) (err error) {
	var (
		hivesPath  = filepath.Join(layerPath, "Hives")
		layoutPath = filepath.Join(layerPath, "Layout")
	)

	// We need to remove the hives directory and layout file as `SetupBaseOSLayer` fails if these files
	// already exist. `SetupBaseOSLayer` will create these files internally. We also remove the base and
	// differencing disks if they exist in case we're asking for a different size.
	if _, err := os.Stat(hivesPath); err == nil {
		if err := os.RemoveAll(hivesPath); err != nil {
			return errors.Wrap(err, "failed to remove prexisting hives directory")
		}
	}
	if _, err := os.Stat(layoutPath); err == nil {
		if err := os.RemoveAll(layoutPath); err != nil {
			return errors.Wrap(err, "failed to remove prexisting layout file")
		}
	}

	if _, err := os.Stat(baseVhdPath); err == nil {
		if err := os.RemoveAll(baseVhdPath); err != nil {
			return errors.Wrap(err, "failed to remove base vhdx path")
		}
	}
	if _, err := os.Stat(diffVhdPath); err == nil {
		if err := os.RemoveAll(diffVhdPath); err != nil {
			return errors.Wrap(err, "failed to remove differencing vhdx")
		}
	}

	createParams := &vhd.CreateVirtualDiskParameters{
		Version: 2,
		Version2: vhd.CreateVersion2{
			MaximumSize:      sizeInGB * 1024 * 1024 * 1024,
			BlockSizeInBytes: defaultVHDXBlockSizeInMB * 1024 * 1024,
		},
	}
	handle, err := vhd.CreateVirtualDisk(baseVhdPath, vhd.VirtualDiskAccessNone, vhd.CreateVirtualDiskFlagNone, createParams)
	if err != nil {
		return errors.Wrap(err, "failed to create vhdx")
	}

	defer func() {
		if err != nil {
			_ = syscall.CloseHandle(handle)
			os.RemoveAll(baseVhdPath)
			os.RemoveAll(diffVhdPath)
		}
	}()

	if err = FormatWritableLayerVhd(ctx, windows.Handle(handle)); err != nil {
		return err
	}
	// Base vhd handle must be closed before calling SetupBaseLayer in case of Container layer
	if err = syscall.CloseHandle(handle); err != nil {
		return errors.Wrap(err, "failed to close vhdx handle")
	}

	options := OsLayerOptions{
		Type: OsLayerTypeContainer,
	}

	// SetupBaseOSLayer expects an empty vhd handle for a container layer and will
	// error out otherwise.
	if err = SetupBaseOSLayer(ctx, layerPath, 0, options); err != nil {
		return err
	}
	// Create the differencing disk that will be what's copied for the final rw layer
	// for a container.
	if err = vhd.CreateDiffVhd(diffVhdPath, baseVhdPath, defaultVHDXBlockSizeInMB); err != nil {
		return errors.Wrap(err, "failed to create differencing disk")
	}

	if err = security.GrantVmGroupAccess(baseVhdPath); err != nil {
		return errors.Wrapf(err, "failed to grant vm group access to %s", baseVhdPath)
	}
	if err = security.GrantVmGroupAccess(diffVhdPath); err != nil {
		return errors.Wrapf(err, "failed to grant vm group access to %s", diffVhdPath)
	}
	return nil
}