Imports github.com/containerd/continuity/sysx github.com/docker/docker/pkg/fileutils github.com/opencontainers/go-digest github.com/pkg/errors github.com/tonistiigi/fsutil/types golang.org/x/sync/errgroup golang.org/x/sys/unix Standard library imports archive/tar bytes context hash io io/ioutil os path path/filepath runtime sort strconv strings sync syscall time