uncompress tar.gz in go

main.go

package main

import (
	"archive/tar"
	"compress/gzip"
	"fmt"
	"io"
	"os"
	"path/filepath"
)

func main() {
	err := ungzip("node-v0.6.9.tar.gz", "test")
	if err != nil {
		fmt.Println(err)
	}
}

func ungzip(src, dest string) error {
	reader, err := os.Open(src)
	if err != nil {
		return err
	}
	defer reader.Close()

	archive, err := gzip.NewReader(reader)
	if err != nil {
		return err
	}
	defer archive.Close()

	tarReader := tar.NewReader(archive)

	for {
		header, err := tarReader.Next()
		if err == io.EOF {
			break
		} else if err != nil {
			return err
		}
		path := filepath.Join(dest, header.Name)
		info := header.FileInfo()
		if info.IsDir() {
			if err = os.MkdirAll(path, info.Mode()); err != nil {
				return err
			}
			continue
		}

		file, err := os.OpenFile(path, os.O_CREATE|os.O_TRUNC|os.O_WRONLY, info.Mode())
		if err != nil {
			return err
		}
		_, err = io.Copy(file, tarReader)
		if err != nil {
			file.Close()
			return err
		}
		file.Close()
	}
	return nil
}