package path

import (
	"os"

	"github.com/pkg/errors"
)

func GetSubDirs(root string) ([]string, error) {
	fd, err := os.Open(root)
	if err != nil {
		return nil, errors.Wrapf(err, "open root directory: %s", root)
	}
	defer fd.Close()

	entries, err := fd.Readdir(-1)
	if err != nil {
		return nil, errors.Wrapf(err, "read root directory: %s", root)
	}

	var paths []string
	for _, entry := range entries {
		if entry.IsDir() {
			paths = append(paths, entry.Name())
		}
	}

	return paths, nil
}