Golang : Read directory content with filepath.Walk()

Golang's filepath.Walk function allow a program to traverse a directory content and tree with ease. In this tutorial, we will see how to read a directory and display its content name with file size. This example will use the http://golang.org/pkg/path/filepath/#Walk function.

readdirwalk.go

 package main

 import (
 "path/filepath"
 "os"
 "flag"
 "fmt"
 )

 func walkpath(path string, f os.FileInfo, err error) error {
 fmt.Printf("%s with %d bytes\n", path,f.Size())
 return nil
 }


 func main() {
 flag.Parse()
 root := flag.Arg(0) // 1st argument is the directory location
 filepath.Walk(root, walkpath)
 }

execute go run readdirwalk.go ./ and see how it goes. You can change to different directory and test out the output as well. Hope this tutorial is helpful to you.