Add site stop chat command (fix #22)

matrix.go

@@ -150,6 +150,25 @@ func initMatrix() {
 		return text + "\n🟢 Successfully restarted site."
 	})
 
+	registerChatCommand("stop", "Stop a site.", func(ctx context.Context, evt *event.Event, args []string) string {
+		if len(args) < 2 {
+			return "🔴 Invalid site."
+		}
+		site, found, err := getSite(args[1])
+		if err != nil {
+			return "🔴 Failed to get site " + args[2] + "!"
+		} else if !found {
+			return "🔴 Invalid site."
+		}
+		text := "⚪️ Stopping server..."
+		if derr := site.Stop(); derr.code != 0 {
+			derr.SendOverMatrix()
+			return text + "\n🔴 Failed to stop site!"
+		}
+		return text + "\n🟢 Successfully stopped site."
+
+	})
+
 	go func() {
 		for range time.Tick(time.Second * 6) {
 			log.Printf("Scanning for queued messages...")

site.go

@@ -134,6 +134,25 @@ func (site *Site) Start() DeployError {
 	return DeployError{}
 }
 
+// Stop attempts to stop a Lapis server in the given repository.
+func (site *Site) Stop() DeployError {
+	log.Printf("Stopping Lapis server %s...", site.getName())
+
+	old_cwd, _ := os.Getwd()
+	defer syscall.Chdir(old_cwd)
+	syscall.Chdir(configuration.sites_dir + "/" + site.name)
+
+	cmd := exec.Command("lapis", "term")
+	if err := cmd.Start(); err != nil {
+		return newDeployError(1, "stopSite",
+			fmt.Sprintf("Failed to stop Lapis server in '%s'", site.getName()), "")
+	}
+	go func() {
+		cmd.Wait()
+	}()
+	return DeployError{}
+}
+
 // Restart attempts to restart the Lapis server in the given repository.
 func (site *Site) Restart() DeployError {
 	log.Printf("Restarting Lapis server in %s...", site.getName())