how to generate multiple uuid and md5 files in golang

Hi I've generated Md5 and uuid in golang but now I want generate it for multiple files using command line arguments, so what exactly I've to do. This is how I've generated my md5 and uuid:

package main
import (
"crypto/rand"
"crypto/md5"
"fmt"
"io"
"os"
"log"
"text/template"
)
type Data struct {
Uuid string
Md5  string
}
func main() {
uuid, err := newUUID()
if err != nil {
fmt.Printf("error: %v\n", err)
}
fmt.Printf("UUID:	%s\n", uuid)
md5 := Getmd5(uuid)
fmt.Printf("Checksum:	%s\n",md5)
fillData := Data{uuid, md5}
file, err := os.Create("text.txt")
if err != nil {
return
}
defer file.Close()
templ, err := template.ParseFiles("template.html")
if err !=nil{
log.Fatalln(err)
}
err = templ.Execute(file,fillData)
if err != nil{
log.Fatalln(err)
}
}
// newUUID generates a random UUID according to RFC 4122
func newUUID() (string, error) {
uuid := make([]byte, 16)
n, err := io.ReadFull(rand.Reader, uuid)
if n != len(uuid) || err != nil {
return "", err
}
// variant bits
uuid[8] = uuid[8]&^0xc0 | 0x80
// version 4 (pseudo-random)
uuid[6] = uuid[6]&^0xf0 | 0x40
return fmt.Sprintf("%x-%x-%x-%x-%x", uuid[0:4], uuid[4:6], uuid[6:8], uuid[8:10], uuid[10:]), nil
}
func Getmd5(uuid string) (string) {
data := []byte(uuid)
//md5_buffer := fmt.Sprintf("%x", md5.Sum(data))
md5_buffer := md5.Sum(data)
return fmt.Sprintf("{0x%x,0x%x,0x%x,0x%x,0x%x,0x%x,0x%x,0x%x,0x%x,0x%x,0x%x,0x%x,0x%x,0x%x,0x%x,0x%x};\n",md5_buffer[0:1],
md5_buffer[1:2],md5_buffer[2:3],md5_buffer[3:4],md5_buffer[4:5],md5_buffer[5:6],md5_buffer[6:7],md5_buffer[7:8],
md5_buffer[8:9],md5_buffer[9:10],md5_buffer[10:11],md5_buffer[11:12],md5_buffer[12:13],md5_buffer[13:14],md5_buffer[14:15],
md5_buffer[15:16])
}

Can anyone help me out?

You can use os.Args to accept command line arguements

os.Args provides access to raw command-line arguments. Note that the first value in this slice is the path to the program, and os.Args[1:] holds the arguments to the program.

Your program will look like this, have a look at createFile and getNumberOfFiles functions and the main

package main
import (
"crypto/md5"
"crypto/rand"
"errors"
"fmt"
"io"
"log"
"os"
"strconv"
"text/template"
)
type Data struct {
Uuid string
Md5  string
}
func createFile(uuid string) {
md5 := Getmd5(uuid)
fmt.Printf("Checksum:   %s\n", md5)
fillData := Data{uuid, md5}
file, err := os.Create(uuid + ".txt")
if err != nil {
return
}
defer file.Close()
templ, err := template.ParseFiles("template.html")
if err != nil {
log.Fatalln(err)
}
err = templ.Execute(file, fillData)
if err != nil {
log.Fatalln(err)
}
}
func getNumberOfFiles() (num int, err error) {
if len(os.Args) == 1 {
return 0, errors.New("Not enough arguements")
}
if num, err = strconv.Atoi(os.Args[1]); err != nil {
return
}
return num, nil
}
func main() {
numberOfFiles, err := getNumberOfFiles()
if err != nil {
fmt.Println(err.Error())
}
fmt.Printf("Creating %d files", numberOfFiles)
for i := 0; i < numberOfFiles; i++ {
uuid, err := newUUID()
if err != nil {
fmt.Printf("error: %v\n", err)
}
createFile(uuid)
}
}
// newUUID generates a random UUID according to RFC 4122
func newUUID() (string, error) {
uuid := make([]byte, 16)
n, err := io.ReadFull(rand.Reader, uuid)
if n != len(uuid) || err != nil {
return "", err
}
// variant bits
uuid[8] = uuid[8]&^0xc0 | 0x80
// version 4 (pseudo-random)
uuid[6] = uuid[6]&^0xf0 | 0x40
return fmt.Sprintf("%x-%x-%x-%x-%x", uuid[0:4], uuid[4:6], uuid[6:8], uuid[8:10], uuid[10:]), nil
}
func Getmd5(uuid string) string {
data := []byte(uuid)
//md5_buffer := fmt.Sprintf("%x", md5.Sum(data))
md5_buffer := md5.Sum(data)
return fmt.Sprintf("{0x%x,0x%x,0x%x,0x%x,0x%x,0x%x,0x%x,0x%x,0x%x,0x%x,0x%x,0x%x,0x%x,0x%x,0x%x,0x%x};\n", md5_buffer[0:1],
md5_buffer[1:2], md5_buffer[2:3], md5_buffer[3:4], md5_buffer[4:5], md5_buffer[5:6], md5_buffer[6:7], md5_buffer[7:8],
md5_buffer[8:9], md5_buffer[9:10], md5_buffer[10:11], md5_buffer[11:12], md5_buffer[12:13], md5_buffer[13:14], md5_buffer[14:15],
md5_buffer[15:16])
}