diff --git a/commands.go b/commands.go index 95ddca1f1d..60641bb796 100644 --- a/commands.go +++ b/commands.go @@ -448,6 +448,15 @@ func (cli *DockerCli) CmdVersion(args ...string) error { if out.GoVersion != "" { fmt.Fprintf(cli.out, "Go version: %s\n", out.GoVersion) } + + release := utils.GetReleaseVersion() + if release != "" { + fmt.Fprintf(cli.out, "Last stable version: %s", release) + if strings.Trim(VERSION, "-dev") != release || strings.Trim(out.Version, "-dev") != release { + fmt.Fprintf(cli.out, ", please update docker") + } + fmt.Fprintf(cli.out, "\n") + } return nil } diff --git a/utils/utils.go b/utils/utils.go index c70e80b72e..def5ae5a50 100644 --- a/utils/utils.go +++ b/utils/utils.go @@ -730,6 +730,22 @@ func ParseHost(host string, port int, addr string) string { return fmt.Sprintf("tcp://%s:%d", host, port) } +func GetReleaseVersion() string { + resp, err := http.Get("http://get.docker.io/latest") + if err != nil { + return "" + } + defer resp.Body.Close() + if resp.ContentLength > 24 || resp.StatusCode != 200 { + return "" + } + body, err := ioutil.ReadAll(resp.Body) + if err != nil { + return "" + } + return strings.TrimSpace(string(body)) +} + // Get a repos name and returns the right reposName + tag // The tag can be confusing because of a port in a repository name. // Ex: localhost.localdomain:5000/samalba/hipache:latest