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: verify.go
    path of file: ./repos/v2ray-core/infra/control
    
    the code of the file until where you have to start completion: package control

import (
	"flag"
	"github.com/xiaokangwang/VSign/signerVerify"
	"os"
	"v2ray.com/core/common"
)

type VerifyCommand struct{}

func (c *VerifyCommand) Name() string {
	return "verify"
}

func (c *VerifyCommand) Description() Description {
	return Description{
		Short: "Verify if a binary is officially signed.",
		Usage: []string{
			"v2ctl verify --sig=<sig-file> file...",
			"Verify the file officially signed by V2Ray.",
		},
	}
}

func (c *VerifyCommand) Execute(args []string) error {
	fs := flag.NewFlagSet(c.Name(), flag.ContinueOnError)

	sigFile := fs.String("sig", "", "Path to the signature file"
    
func (c *VerifyCommand) Execute(args []string) error {
	fs := flag.NewFlagSet(c.Name(), flag.ContinueOnError)

	sigFile := fs.String("sig", "", "Path to the signature file")

	if err := fs.Parse(args); err != nil {
		return err
	}

	target := fs.Arg(0)
	if target == "" {
		return newError("empty file path.")
	}

	if *sigFile == "" {
		return newError("empty signature path.")
	}

	sigReader, err := os.Open(os.ExpandEnv(*sigFile))
	if err != nil {
		return newError("failed to open file ", *sigFile).Base(err)
	}

	files := fs.Args()

	err = signerVerify.OutputAndJudge(signerVerify.CheckSignaturesV2Fly(sigReader, files))

	if err == nil {
		return nil
	}

	return newError("file is not officially signed by V2Ray").Base(err)
}