Added more doc

- Added auto reload for doc engine
- Added helloworld example

docs/plugins/main.go

@@ -5,6 +5,9 @@ import (
 	"fmt"
 	"log"
 	"net/http"
+	"time"
+
+	"github.com/fsnotify/fsnotify"
 )
 
 type FileInfo struct {
@@ -17,6 +20,8 @@ type FileInfo struct {
 var (
 	mode     = flag.String("m", "web", "Mode to run the application: 'web' or 'build'")
 	root_url = flag.String("root", "/html/", "Root URL for the web server")
+
+	webserver_stop_chan = make(chan bool, 1)
 )
 
 func main() {
@@ -27,12 +32,67 @@ func main() {
 	case "build":
 		build()
 	default:
+		go watchDocsChange()
+		fmt.Println("Running in web mode")
+		startWebServerInBackground()
+		select {}
+	}
+}
+
+func startWebServerInBackground() {
+	go func() {
+		server := &http.Server{Addr: ":8080", Handler: http.DefaultServeMux}
+		http.DefaultServeMux = http.NewServeMux()
 		http.HandleFunc("/", func(w http.ResponseWriter, r *http.Request) {
 			http.FileServer(http.Dir("./")).ServeHTTP(w, r)
 		})
+
+		go func() {
+			<-webserver_stop_chan
+			fmt.Println("Stopping server at :8080")
+			if err := server.Close(); err != nil {
+				log.Println("Error stopping server:", err)
+			}
+		}()
+
 		fmt.Println("Starting server at :8080")
-		if err := http.ListenAndServe(":8080", nil); err != nil {
+		if err := server.ListenAndServe(); err != nil && err != http.ErrServerClosed {
 			log.Fatal(err)
 		}
+	}()
+}
+
+func watchDocsChange() {
+	watcher, err := fsnotify.NewWatcher()
+	if err != nil {
+		log.Fatal(err)
+	}
+	defer watcher.Close()
+
+	err = watcher.Add("./docs")
+	if err != nil {
+		log.Fatal(err)
+	}
+
+	for {
+		select {
+		case event, ok := <-watcher.Events:
+			if !ok {
+				return
+			}
+			if event.Op&(fsnotify.Write|fsnotify.Create|fsnotify.Remove|fsnotify.Rename) != 0 {
+				log.Println("Change detected in docs folder:", event)
+				webserver_stop_chan <- true
+				time.Sleep(1 * time.Second) // Allow server to stop gracefully
+				build()
+				startWebServerInBackground()
+				log.Println("Static html files regenerated")
+			}
+		case err, ok := <-watcher.Errors:
+			if !ok {
+				return
+			}
+			log.Println("Watcher error:", err)
+		}
 	}
 }