package cluster

import (
	"io/fs"
	"path/filepath"

	"github.com/hack-pad/hackpadfs/os"
)

// DirFS returns a file system (an [fs.FS]) for the tree
// of files rooted at the directory dir.
func DirFS(dir string) (fs.FS, error) {
	dir = filepath.Clean(dir)
	fullPath, err := filepath.Abs(dir)
	if err != nil {
		return nil, err
	}

	sub, err := os.NewFS().Sub(fullPath[1:])
	if err != nil {
		return nil, err
	}

	return sub, nil
}