Imports github.com/pkg/errors github.com/containerd/containerd/sys github.com/containerd/containerd/filters github.com/opencontainers/go-digest github.com/containerd/containerd/content github.com/containerd/containerd/log github.com/containerd/containerd/errdefs Standard library imports context fmt io io/ioutil math/rand os path/filepath runtime strconv strings sync syscall time