package main

import (
	"archive/tar"
	"compress/gzip"
	"io"
	"os"
)

func main() {
	Compress("01.png", "02.tar.gz")
}

func Compress(file string, dest string) error {
	f, err := os.Open(file)
	if err != nil {
		return err
	}
	defer f.Close()
	d, err := os.Create(dest)
	if err != nil {
		return err
	}
	defer d.Close()
	gw := gzip.NewWriter(d)
	defer gw.Close()
	tw := tar.NewWriter(gw)
	defer tw.Close()
	info, err := f.Stat()
	if err != nil {
		return err
	}
	header, err := tar.FileInfoHeader(info, "")
	if err != nil {
		return err
	}
	err = tw.WriteHeader(header)
	if err != nil {
		return err
	}
	_, err = io.Copy(tw, f)
	if err != nil {
		return err
	}
	return nil
}