Walk directory in Go

main.go

package main

import (
	"fmt"
	"github.com/karrick/godirwalk"
	"io/ioutil"
)

func main() {
	godirwalk.Walk("./", &godirwalk.Options{
		Unsorted: true,
		Callback: func(osPathname string, info *godirwalk.Dirent) error {
			if !info.IsDir() {
				content, err := ioutil.ReadFile(osPathname)
				bytesCount := 0

				if err == nil {
					for index := 0; index < len(content); index++ {
						if content[index] == 0 {
							fmt.Println(fmt.Sprintf("./%s bytes=%d binary file", osPathname, bytesCount))
							break
						}

						bytesCount++
					}

					fmt.Println(fmt.Sprintf("./%s bytes=%d", osPathname, bytesCount))
				}
			}

			return nil
		},
		ErrorCallback: func(osPathname string, err error) godirwalk.ErrorAction {
			return godirwalk.SkipNode
		},
	})
}