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Golangでディレクトリ内のファイル一覧を入手する

Last updated at Posted at 2016-08-28

指定したディレクトリ配下にあるファイル一覧をスライスで返す。
サブディレクトリがあれば再帰で掘っていく。

main.go
package main

import (
	"fmt"
	"io/ioutil"
	"path/filepath"
)

func main() {
	fmt.Println(dirwalk("./test"))
}

func dirwalk(dir string) []string {
	files, err := ioutil.ReadDir(dir)
	if err != nil {
		panic(err)
	}

	var paths []string
	for _, file := range files {
		if file.IsDir() {
			paths = append(paths, dirwalk(filepath.Join(dir, file.Name()))...)
			continue
		}
		paths = append(paths, filepath.Join(dir, file.Name()))
	}

	return paths
}
$ ls
main.go	test

$ tree test
test
├── file
├── test1
│   ├── file1-1
│   └── file1-2
└── test2
    ├── file2-1
    └── file2-2

2 directories, 5 files

$ go run main.go
[test/file test/test1/file1-1 test/test1/file1-2 test/test2/file2-1 test/test2/file2-2]
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