Recursive glob in Go

recursiveGlob.go

func RecursiveGlob(dirPath string, pattern string) ([]string, error) {
	old, err := os.Getwd()
	if err != nil {
		return nil, err
	}
	defer os.Chdir(old)
	err = os.Chdir(dirPath)
	if err != nil {
		return nil, err
	}
	paths, err := filepath.Glob(pattern)
	if err != nil {
		return nil, err
	}
	for i := range paths {
		paths[i] = filepath.Join(dirPath, paths[i])
	}
	dir, err := os.Open(dirPath)
	if err != nil {
		return nil, err
	}
	fis, err := dir.Readdir(0)
	if err != nil {
		return nil, err
	}
	for _, f := range fis {
		if f.IsDir() {
			glob, err := RecursiveGlob(filepath.Join(dirPath, f.Name()), pattern)
			if err != nil {
				return nil, err
			}
			paths = append(paths, glob...)
		}
	}
	return paths, nil
}