package replica

import (
	"errors"
	"io/fs"
	"os"
	"path/filepath"
)

func DropEmptyRefs(repo string) error {
	err := filepath.WalkDir(filepath.Join(repo, "refs"), func(p string, d fs.DirEntry, err error) error {
		if err != nil || !d.Type().IsRegular() {
			return err
		}
		fi, err := d.Info()
		if err != nil {
			return err
		}
		if fi.Size() == 0 {
			return os.Remove(p)
		}
		return nil
	})
	if errors.Is(err, fs.ErrNotExist) {
		return nil
	}
	return err
}