Add global-chat shout command

Add command to broadcast a message to all instances from clusterctl.

plugins/global_chat/control.js

@@ -0,0 +1,28 @@
+"use strict";
+const plugin = require("lib/plugin");
+const info = require("./info");
+const command = require("lib/command");
+
+
+const globalChatCommands = new command.CommandTree({ name: "global-chat", description: "Global Chat plugin commands" });
+globalChatCommands.add(new command.Command({
+	definition: ["shout <message>", "Send message to all instances", (yargs) => {
+		yargs.positional("message", { describe: "message to send", type: "string" });
+	}],
+	handler: async function(args, control) {
+		await info.messages.chat.send(control, {
+			instance_name: "Console",
+			content: args.message,
+		});
+	},
+}));
+
+class ControlPlugin extends plugin.BaseControlPlugin {
+	async addCommands(rootCommand) {
+		rootCommand.add(globalChatCommands);
+	}
+}
+
+module.exports = {
+	ControlPlugin,
+};

plugins/global_chat/info.js

@@ -8,11 +8,12 @@ module.exports = {
 	description: "Forwards chat between instances.",
 	version: "2.0.0-alpha",
 	instanceEntrypoint: "instance",
+	controlEntrypoint: "control",
 
 	messages: {
 		chat: new link.Event({
 			type: "global_chat:chat",
-			links: ["instance-slave", "slave-master", "master-slave", "slave-instance"],
+			links: ["instance-slave", "slave-master", "master-slave", "slave-instance", "control-master"],
 			forwardTo: "master",
 			broadcastTo: "instance",
 			eventProperties: {