clean empty folder

/*
clear all empty folder or only contain .DS_Store Thunmbs.db
TODO:CHECK PARENT FOLDER
*/
package main

import (
	"fmt"
	"io/ioutil"
	"log"
	"os"
	"path/filepath"
	"strings"
)

var cur_path string
var all_empty_dir_list []string
var need_del_dir_list []string

func main() {
	var err error
	cur_path, err = filepath.Abs(filepath.Dir(os.Args[0]))
	if err != nil {
		log.Fatal(err)
	}
	fmt.Println("base dir path:" + cur_path)

	del_cache_files()
	find_empty_folder()
	check_remove_folder()
}

func del_cache_files() {
	filepath.Walk(cur_path, func(path string, fi os.FileInfo, err error) error {
		if fi == nil {
			return err
		}
		if fi.IsDir() {
			return nil
		}
		if fi.Name() == ".DS_Store" || fi.Name() == "Thumbs.db" {
			err := os.Remove(path)
			if err != nil {
				log.Fatal(err)
			}
		}
		return nil
	})
}

func find_empty_folder() {
	all_empty_dir_list = make([]string, 0)
	filepath.Walk(cur_path, func(path string, fi os.FileInfo, err error) error {
		if fi == nil {
			return err
		}
		if fi.IsDir() && !strings.Contains(path, ".git") {

			list, err := ioutil.ReadDir(path)
			if err != nil {
				log.Fatal(err)
			}
			if len(list) <= 0 {
				all_empty_dir_list = append(all_empty_dir_list, path)
			}

		}
		return nil
	})
}

func check_remove_folder() {
	fmt.Println("==========================")
	need_del_dir_list = make([]string, 0)
	for _, tmp_dir := range all_empty_dir_list {
		fmt.Println("remove:" + tmp_dir)
		err := os.Remove(tmp_dir)
		if err != nil {
			log.Fatal(err)
		}
	}
}