Basic support for kubectl plugins

pkg/kubectl/cmd/cmd.go

@@ -347,6 +347,24 @@ func NewKubectlCommand(f cmdutil.Factory, in io.Reader, out, err io.Writer) *cob
 			},
 		},
 	}
+
+	// Loads plugins and create commands for each plugin identified
+	loadedPlugins, loadErr := f.PluginLoader().Load()
+	if loadErr != nil {
+		glog.V(1).Infof("Unable to load plugins: %v", loadErr)
+	}
+	pluginRunner := f.PluginRunner()
+	if len(loadedPlugins) > 0 {
+		pluginCmds := []*cobra.Command{}
+		for _, p := range loadedPlugins {
+			pluginCmds = append(pluginCmds, NewCmdForPlugin(p, pluginRunner, in, out, err))
+		}
+		groups = append(groups, templates.CommandGroup{
+			Message:  "Plugins:",
+			Commands: pluginCmds,
+		})
+	}
+
 	groups.Add(cmds)
 
 	filters := []string{