package directory // import "github.com/docker/docker/pkg/directory" import ( "os" "path/filepath" ) // Size walks a directory tree and returns its total size in bytes. func Size(dir string) (size int64, err error) { err = filepath.Walk(dir, func(d string, fileInfo os.FileInfo, err error) error { if err != nil { // if dir does not exist, Size() returns the error. // if dir/x disappeared while walking, Size() ignores dir/x. if os.IsNotExist(err) && d != dir { return nil } return err } // Ignore directory sizes if fileInfo == nil { return nil } s := fileInfo.Size() if fileInfo.IsDir() || s == 0 { return nil } size += s return nil }) return }