List all files (recursively) in a directory

Directory listing

Use the ioutil.ReadDir function in package io/ioutil. It returns a sorted slice containing elements of type os.FileInfo.

The code in this example prints a sorted list of all file names in the current directory.

files, err := ioutil.ReadDir(".") if err != nil {	log.Fatal(err) } for _, f := range files {	fmt.Println(f.Name()) }

Example output:

dev etc tmp usr 

Visit all files and folders in a directory tree

Use the filepath.Walk function in package path/filepath.

• It walks a file tree calling a function of type filepath.WalkFunc for each file or directory in the tree, including the root.
• The files are walked in lexical order.
• Symbolic links are not followed.

The code in this example lists the paths and sizes of all files and directories in the file tree rooted at the current directory.

err := filepath.Walk(".",	func(path string, info os.FileInfo, err error) error {	if err != nil {	return err	}	fmt.Println(path, info.Size())	return nil }) if err != nil {	log.Println(err) }

Example output:

. 1644 dev 1644 dev/null 0 dev/random 0 dev/urandom 0 dev/zero 0 etc 1644 etc/group 116 etc/hosts 20 etc/passwd 0 etc/resolv.conf 0 tmp 548 usr 822 usr/local 822 usr/local/go 822 usr/local/go/lib 822 usr/local/go/lib/time 822 usr/local/go/lib/time/zoneinfo.zip 366776