fix: event listener not work on macos

Author: namchuai

engine/config/yaml_config.cc

@@ -18,6 +18,7 @@ void YamlHandler::Reset() {
 void YamlHandler::ReadYamlFile(const std::string& file_path) {
   namespace fs = std::filesystem;
   namespace fmu = file_manager_utils;
+
   try {
     yaml_node_ = YAML::LoadFile(file_path);
     // incase of model.yml file, we don't have files yet, create them
@@ -41,7 +42,6 @@ void YamlHandler::ReadYamlFile(const std::string& file_path) {
       yaml_node_["files"] = v;
     }
   } catch (const YAML::BadFile& e) {
-    std::cerr << "Failed to read file: " << e.what() << std::endl;
     throw;
   }
 }

engine/services/file_watcher_service.h

@@ -13,8 +13,8 @@
 #include <windows.h>
 
 #else  // Linux
-#include <poll.h>
 #include <limits.h>
+#include <poll.h>
 #include <sys/inotify.h>
 #include <unistd.h>
 #endif
@@ -121,38 +121,60 @@ class FileWatcherService {
     auto* watcher = static_cast<FileWatcherService*>(clientCallBackInfo);
 
     for (size_t i = 0; i < numEvents; i++) {
-      if (eventFlags[i] & kFSEventStreamEventFlagItemRemoved) {
+      if (eventFlags[i] & (kFSEventStreamEventFlagItemRemoved |
+                           kFSEventStreamEventFlagItemRenamed |
+                           kFSEventStreamEventFlagItemModified)) {
+        CTL_INF("File removed: " + std::string(paths[i]));
+        CTL_INF("File event detected: " + std::string(paths[i]) +
+                " flags: " + std::to_string(eventFlags[i]));
         watcher->model_service_->ForceIndexingModelList();
       }
     }
   }
 
   void WatcherThread() {
-    // macOS implementation
-    auto mypath = CFStringCreateWithCString(NULL, watch_path_.c_str(),
+    // Create a dedicated run loop for file system events
+    CFRunLoopRef runLoop = CFRunLoopGetCurrent();
+
+    auto mypath = CFStringCreateWithCString(nullptr, watch_path_.c_str(),
                                             kCFStringEncodingUTF8);
-    auto path_to_watch = CFArrayCreate(NULL, (const void**)&mypath, 1, NULL);
+    auto pathsToWatch = CFArrayCreate(nullptr, (const void**)&mypath, 1,
+                                      &kCFTypeArrayCallBacks);
 
-    FSEventStreamContext context = {0, this, NULL, NULL, NULL};
+    FSEventStreamContext context = {0, this, nullptr, nullptr, nullptr};
 
-    event_stream =
-        FSEventStreamCreate(NULL, &FileWatcherService::callback, &context,
-                            path_to_watch, kFSEventStreamEventIdSinceNow,
-                            0.5,  // 500ms latency
-                            kFSEventStreamCreateFlagFileEvents);
+    event_stream = FSEventStreamCreate(
+        nullptr, &FileWatcherService::callback, &context, pathsToWatch,
+        kFSEventStreamEventIdSinceNow, 1,  // each second
+        kFSEventStreamCreateFlagFileEvents | kFSEventStreamCreateFlagNoDefer |
+            kFSEventStreamCreateFlagWatchRoot);
 
-    dispatch_queue_t queue = dispatch_get_main_queue();
-    FSEventStreamSetDispatchQueue(event_stream, queue);
-    FSEventStreamStart(event_stream);
+    if (!event_stream) {
+      CFRelease(pathsToWatch);
+      CFRelease(mypath);
+      throw std::runtime_error("Failed to create FSEvent stream");
+    }
+
+    FSEventStreamScheduleWithRunLoop(event_stream, runLoop,
+                                     kCFRunLoopDefaultMode);
+
+    if (!FSEventStreamStart(event_stream)) {
+      FSEventStreamInvalidate(event_stream);
+      FSEventStreamRelease(event_stream);
+      CFRelease(pathsToWatch);
+      CFRelease(mypath);
+      throw std::runtime_error("Failed to start FSEvent stream");
+    }
 
     while (running_) {
-      CFRunLoopRunInMode(kCFRunLoopDefaultMode, 1.0, false);
+      // Process events for a short time before checking running_ flag
+      CFRunLoopRunInMode(kCFRunLoopDefaultMode, 0.25, true);
     }
 
     FSEventStreamStop(event_stream);
     FSEventStreamInvalidate(event_stream);
     FSEventStreamRelease(event_stream);
-    CFRelease(path_to_watch);
+    CFRelease(pathsToWatch);
     CFRelease(mypath);
   }
 
@@ -221,22 +243,22 @@ class FileWatcherService {
     const int watch_flags = IN_DELETE | IN_DELETE_SELF | IN_CREATE;
     wd = inotify_add_watch(fd, dirPath.c_str(), watch_flags);
     if (wd < 0) {
-      throw std::runtime_error("Failed to add watch on " + dirPath + 
-                             ": " + std::string(strerror(errno)));
+      throw std::runtime_error("Failed to add watch on " + dirPath + ": " +
+                               std::string(strerror(errno)));
     }
     watch_descriptors[wd] = dirPath;
 
     // Add watches for subdirectories
     try {
-      for (const auto& entry : 
+      for (const auto& entry :
            std::filesystem::recursive_directory_iterator(dirPath)) {
         if (std::filesystem::is_directory(entry)) {
           int subwd = inotify_add_watch(fd, entry.path().c_str(), watch_flags);
           if (subwd >= 0) {
             watch_descriptors[subwd] = entry.path().string();
           } else {
-            CTL_ERR("Failed to add watch for subdirectory " + 
-                    entry.path().string() + ": " + 
+            CTL_ERR("Failed to add watch for subdirectory " +
+                    entry.path().string() + ": " +
                     std::string(strerror(errno)));
           }
         }
@@ -274,21 +296,17 @@ class FileWatcherService {
       return;
     }
 
-        const int POLL_TIMEOUT_MS = 1000; // 1 second timeout
+    const int POLL_TIMEOUT_MS = 1000;  // 1 second timeout
     char buffer[4096];
-    struct pollfd pfd = {
-        .fd = fd,
-        .events = POLLIN,
-        .revents = 0
-    };
-    
+    struct pollfd pfd = {.fd = fd, .events = POLLIN, .revents = 0};
+
     while (running_) {
       // Poll will sleep until either:
       // 1. Events are available (POLLIN)
       // 2. POLL_TIMEOUT_MS milliseconds have elapsed
       // 3. An error occurs
       int poll_result = poll(&pfd, 1, POLL_TIMEOUT_MS);
-      
+
       if (poll_result < 0) {
         if (errno == EINTR) {
           // System call was interrupted, just retry
@@ -297,7 +315,7 @@ class FileWatcherService {
         CTL_ERR("Poll failed: " + std::string(strerror(errno)));
         break;
       }
-      
+
       if (poll_result == 0) {  // Timeout - no events
         // No need to sleep - poll() already waited
         continue;
@@ -327,17 +345,18 @@ class FileWatcherService {
         // Process events
         size_t i = 0;
         while (i < static_cast<size_t>(length)) {
-          struct inotify_event* event = 
+          struct inotify_event* event =
               reinterpret_cast<struct inotify_event*>(&buffer[i]);
-          
+
           if (event->mask & (IN_DELETE | IN_DELETE_SELF)) {
             try {
               model_service_->ForceIndexingModelList();
             } catch (const std::exception& e) {
-              CTL_ERR("Error processing delete event: " + std::string(e.what()));
+              CTL_ERR("Error processing delete event: " +
+                      std::string(e.what()));
             }
           }
-          
+
           i += sizeof(struct inotify_event) + event->len;
         }
       }