unzip.go

package main

import (
	"archive/zip"
	"io"
	"os"
	"path/filepath"
)

func Unzip(src, dest string) error {
	r, err := zip.OpenReader(src)
	if err != nil {
		return err
	}

	for _, f := range r.File {
		rc, err := f.Open()
		if err != nil {
			panic(err)
		}

		path := filepath.Join(dest, f.Name)
		if f.FileInfo().IsDir() {
			os.MkdirAll(path, f.Mode())
		} else {
			f, err := os.OpenFile(
				path, os.O_WRONLY|os.O_CREATE|os.O_TRUNC, f.Mode())
			if err != nil {
				panic(err)
			}

			_, err = io.Copy(f, rc)
			if err != nil {
				panic(err)
			}
			f.Close()
		}
		rc.Close()
	}
	r.Close()
	return nil
}