Imports github.com/blang/semver github.com/urfave/cli github.com/miekg/dns github.com/satori/go.uuid github.com/tsuru/config github.com/kardianos/osext github.com/briandowns/spinner Standard library imports os/user compress/gzip os/signal net archive/tar bufio bytes encoding/base64 encoding/json fmt io io/ioutil net/http net/url os os/exec path path/filepath regexp sort strconv strings syscall time