add watch mode

modules/http/http.go

@@ -308,3 +308,22 @@ func RegisterStaticHandler(urlPrefix, rootPath string) {
 
 	staticHandlers[urlPrefix] = fs
 }
+
+func StopAllServers() {
+	globalMu.Lock()
+	defer globalMu.Unlock()
+
+	if globalWorkerPool != nil {
+		globalWorkerPool.Close()
+		globalWorkerPool = nil
+	}
+
+	if globalServer != nil {
+		ctx, cancel := context.WithTimeout(context.Background(), 5*time.Second)
+		defer cancel()
+		globalServer.ShutdownWithContext(ctx)
+		globalServer = nil
+	}
+
+	serverRunning = false
+}

moonshark.go

@@ -1,25 +1,43 @@
 package main
 
 import (
+	"flag"
 	"fmt"
+	"log"
 	"os"
 	"os/signal"
 	"path/filepath"
 	"syscall"
+	"time"
 
 	"Moonshark/modules/http"
 	"Moonshark/state"
 )
 
+var (
+	watchFlag = flag.Bool("watch", false, "Watch script files for changes and restart")
+	wFlag     = flag.Bool("w", false, "Watch script files for changes and restart (short)")
+)
+
 func main() {
-	if len(os.Args) < 2 {
-		fmt.Fprintf(os.Stderr, "Usage: %s <script.lua>\n", filepath.Base(os.Args[0]))
+	flag.Parse()
+
+	if flag.NArg() < 1 {
+		fmt.Fprintf(os.Stderr, "Usage: %s [--watch|-w] <script.lua>\n", filepath.Base(os.Args[0]))
 		os.Exit(1)
 	}
 
-	scriptPath := os.Args[1]
+	scriptPath := flag.Arg(0)
+	watchMode := *watchFlag || *wFlag
 
-	// Create state configured for the script
+	if watchMode {
+		runWithWatcher(scriptPath)
+	} else {
+		runOnce(scriptPath)
+	}
+}
+
+func runOnce(scriptPath string) {
 	luaState, err := state.NewFromScript(scriptPath)
 	if err != nil {
 		fmt.Fprintf(os.Stderr, "Error: %v\n", err)
@@ -27,28 +45,96 @@ func main() {
 	}
 	defer luaState.Close()
 
-	// Execute the script
 	if err := luaState.ExecuteFile(scriptPath); err != nil {
 		fmt.Fprintf(os.Stderr, "Error: %v\n", err)
 		os.Exit(1)
 	}
 
-	// Check if HTTP servers are running
 	if http.HasActiveServers() {
-		// Set up signal handling for graceful shutdown
 		sigChan := make(chan os.Signal, 1)
 		signal.Notify(sigChan, syscall.SIGINT, syscall.SIGTERM)
 
 		fmt.Println("HTTP servers running. Press Ctrl+C to exit.")
 
-		// Wait for either signal or servers to close
 		go func() {
 			<-sigChan
 			fmt.Println("\nShutting down...")
 			os.Exit(0)
 		}()
 
-		// Wait for all servers to finish
 		http.WaitForServers()
 	}
 }
+
+func runWithWatcher(scriptPath string) {
+	watcher, err := NewFileWatcher(500) // 500ms debounce
+	if err != nil {
+		fmt.Fprintf(os.Stderr, "Failed to create file watcher: %v\n", err)
+		os.Exit(1)
+	}
+	defer watcher.Close()
+
+	if err := watcher.DiscoverRequiredFiles(scriptPath); err != nil {
+		fmt.Fprintf(os.Stderr, "Failed to watch files: %v\n", err)
+		os.Exit(1)
+	}
+
+	restartCh := watcher.Start()
+	sigChan := make(chan os.Signal, 1)
+	signal.Notify(sigChan, syscall.SIGINT, syscall.SIGTERM)
+
+	fmt.Printf("Starting %s in watch mode...\n", scriptPath)
+
+	for {
+		// Clear cache before each run
+		state.ClearCache()
+
+		// Create and run state
+		luaState, err := state.NewFromScript(scriptPath)
+		if err != nil {
+			log.Printf("Error creating state: %v", err)
+			time.Sleep(1 * time.Second)
+			continue
+		}
+
+		if err := luaState.ExecuteFile(scriptPath); err != nil {
+			log.Printf("Execution error: %v", err)
+			luaState.Close()
+			time.Sleep(1 * time.Second)
+			continue
+		}
+
+		// If not a long-running process, wait for changes and restart
+		if !http.HasActiveServers() {
+			fmt.Println("Script completed. Waiting for changes...")
+			luaState.Close()
+
+			select {
+			case <-restartCh:
+				fmt.Println("Files changed, restarting...")
+				continue
+			case <-sigChan:
+				fmt.Println("\nExiting...")
+				return
+			}
+		}
+
+		// Long-running process - wait for restart signal or exit signal
+		fmt.Println("HTTP servers running. Watching for file changes...")
+
+		select {
+		case <-restartCh:
+			fmt.Println("Files changed, restarting...")
+			http.StopAllServers()
+			luaState.Close()
+			time.Sleep(100 * time.Millisecond) // Brief pause for cleanup
+			continue
+
+		case <-sigChan:
+			fmt.Println("\nShutting down...")
+			http.StopAllServers()
+			luaState.Close()
+			return
+		}
+	}
+}

watcher.go

@@ -0,0 +1,136 @@
+package main
+
+import (
+	"fmt"
+	"log"
+	"os"
+	"path/filepath"
+	"strings"
+	"sync"
+	"time"
+)
+
+type FileWatcher struct {
+	files      map[string]time.Time
+	mu         sync.RWMutex
+	restartCh  chan bool
+	stopCh     chan bool
+	debounceMs int
+	lastEvent  time.Time
+	pollMs     int
+}
+
+func NewFileWatcher(debounceMs int) (*FileWatcher, error) {
+	return &FileWatcher{
+		files:      make(map[string]time.Time),
+		restartCh:  make(chan bool, 1),
+		stopCh:     make(chan bool, 1),
+		debounceMs: debounceMs,
+		pollMs:     250, // Poll every 250ms
+	}, nil
+}
+
+func (fw *FileWatcher) AddFile(path string) error {
+	absPath, err := filepath.Abs(path)
+	if err != nil {
+		return err
+	}
+
+	info, err := os.Stat(absPath)
+	if err != nil {
+		return err
+	}
+
+	fw.mu.Lock()
+	fw.files[absPath] = info.ModTime()
+	fw.mu.Unlock()
+
+	fmt.Printf("Watching: %s\n", absPath)
+	return nil
+}
+
+func (fw *FileWatcher) AddDirectory(dir string) error {
+	return filepath.Walk(dir, func(path string, info os.FileInfo, err error) error {
+		if err != nil {
+			return err
+		}
+
+		if !info.IsDir() && strings.HasSuffix(path, ".lua") {
+			return fw.AddFile(path)
+		}
+		return nil
+	})
+}
+
+func (fw *FileWatcher) Start() <-chan bool {
+	go fw.pollLoop()
+	return fw.restartCh
+}
+
+func (fw *FileWatcher) pollLoop() {
+	ticker := time.NewTicker(time.Duration(fw.pollMs) * time.Millisecond)
+	defer ticker.Stop()
+
+	for {
+		select {
+		case <-fw.stopCh:
+			return
+		case <-ticker.C:
+			fw.checkFiles()
+		}
+	}
+}
+
+func (fw *FileWatcher) checkFiles() {
+	fw.mu.RLock()
+	files := make(map[string]time.Time, len(fw.files))
+	for path, modTime := range fw.files {
+		files[path] = modTime
+	}
+	fw.mu.RUnlock()
+
+	changed := false
+	for path, lastMod := range files {
+		info, err := os.Stat(path)
+		if err != nil {
+			continue
+		}
+
+		if info.ModTime().After(lastMod) {
+			fw.mu.Lock()
+			fw.files[path] = info.ModTime()
+			fw.mu.Unlock()
+
+			now := time.Now()
+			if now.Sub(fw.lastEvent) > time.Duration(fw.debounceMs)*time.Millisecond {
+				fw.lastEvent = now
+				log.Printf("File changed: %s", path)
+				changed = true
+			}
+		}
+	}
+
+	if changed {
+		select {
+		case fw.restartCh <- true:
+		default:
+		}
+	}
+}
+
+func (fw *FileWatcher) Close() error {
+	select {
+	case fw.stopCh <- true:
+	default:
+	}
+	return nil
+}
+
+func (fw *FileWatcher) DiscoverRequiredFiles(scriptPath string) error {
+	if err := fw.AddFile(scriptPath); err != nil {
+		return err
+	}
+
+	scriptDir := filepath.Dir(scriptPath)
+	return fw.AddDirectory(scriptDir)
+}