Imports github.com/docker/docker/pkg/symlink github.com/docker/docker/pkg/stringid github.com/docker/docker/pkg/fileutils github.com/docker/docker/pkg/archive github.com/docker/docker/autogen/dockerversion github.com/docker/docker/pkg/urlutil Standard library imports bufio encoding/hex fmt io io/ioutil net/http net/url os os/exec path/filepath runtime strings crypto/sha1