feat(tunasync): add tunasynctl reload subcommand

cmd/tunasynctl/tunasynctl.go

@@ -225,6 +225,39 @@ func cmdJob(cmd tunasync.CmdVerb) cli.ActionFunc {
 	}
 }
 
+func cmdWorker(cmd tunasync.CmdVerb) cli.ActionFunc {
+	return func(c *cli.Context) error {
+		cmd := tunasync.ClientCmd{
+			Cmd:      cmd,
+			WorkerID: c.String("worker"),
+		}
+		resp, err := tunasync.PostJSON(baseURL+cmdPath, cmd, client)
+		if err != nil {
+			return cli.NewExitError(
+				fmt.Sprintf("Failed to correctly send command: %s",
+					err.Error()),
+				1)
+		}
+		defer resp.Body.Close()
+
+		if resp.StatusCode != http.StatusOK {
+			body, err := ioutil.ReadAll(resp.Body)
+			if err != nil {
+				return cli.NewExitError(
+					fmt.Sprintf("Failed to parse response: %s", err.Error()),
+					1)
+			}
+
+			return cli.NewExitError(fmt.Sprintf("Failed to correctly send"+
+				" command: HTTP status code is not 200: %s", body),
+				1)
+		}
+		logger.Info("Succesfully send command")
+
+		return nil
+	}
+}
+
 func main() {
 	app := cli.NewApp()
 	app.EnableBashCompletion = true
@@ -304,6 +337,12 @@ func main() {
 			Flags:  append(commonFlags, cmdFlags...),
 			Action: initializeWrapper(cmdJob(tunasync.CmdRestart)),
 		},
+		{
+			Name:   "reload",
+			Usage:  "Tell worker to reload configurations",
+			Flags:  append(commonFlags, cmdFlags...),
+			Action: initializeWrapper(cmdWorker(tunasync.CmdReload)),
+		},
 		{
 			Name:   "ping",
 			Flags:  append(commonFlags, cmdFlags...),