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: export.go
    path of file: ./repos/ko/vendor/github.com/google/go-containerregistry/cmd/crane/cmd
    
    the code of the file until where you have to start completion: // Copyright 2018 Google LLC All Rights Reserved.
//
// 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.

package cmd

import (
	"fmt"
	"io"
	"log"
	"o
    
func NewCmdExport(options *[]crane.Option) *cobra.Command {
	return &cobra.Command{
		Use:   "export IMAGE|- TARBALL|-",
		Short: "Export filesystem of a container image as a tarball",
		Example: `  # Write tarball to stdout
  crane export ubuntu -

  # Write tarball to file
  crane export ubuntu ubuntu.tar

  # Read image from stdin
  crane export - ubuntu.tar`,
		Args: cobra.RangeArgs(1, 2),
		RunE: func(_ *cobra.Command, args []string) error {
			src, dst := args[0], "-"
			if len(args) > 1 {
				dst = args[1]
			}

			f, err := openFile(dst)
			if err != nil {
				return fmt.Errorf("failed to open %s: %w", dst, err)
			}
			defer f.Close()

			var img v1.Image
			if src == "-" {
				tmpfile, err := os.CreateTemp("", "crane")
				if err != nil {
					log.Fatal(err)
				}
				defer os.Remove(tmpfile.Name())

				if _, err := io.Copy(tmpfile, os.Stdin); err != nil {
					log.Fatal(err)
				}
				tmpfile.Close()

				img, err = tarball.ImageFromPath(tmpfile.Name(), nil)
				if err != nil {
					return fmt.Errorf("reading tarball from stdin: %w", err)
				}
			} else {
				desc, err := crane.Get(src, *options...)
				if err != nil {
					return fmt.Errorf("pulling %s: %w", src, err)
				}
				if desc.MediaType.IsSchema1() {
					img, err = desc.Schema1()
					if err != nil {
						return fmt.Errorf("pulling schema 1 image %s: %w", src, err)
					}
				} else {
					img, err = desc.Image()
					if err != nil {
						return fmt.Errorf("pulling Image %s: %w", src, err)
					}
				}
			}

			return crane.Export(img, f)
		},
	}
}