easytier-gui: prevent multiple instances (#265)

* easytier-gui: prevent multiple instances
* ignore single instance for Android and iOS

easytier-gui/src-tauri/Cargo.toml

@@ -49,3 +49,6 @@ tauri-plugin-autostart = "2.0.0-rc"
 [features]
 # This feature is used for production builds or when a dev server is not specified, DO NOT REMOVE!!
 custom-protocol = ["tauri/custom-protocol"]
+
+[target.'cfg(not(any(target_os = "android", target_os = "ios")))'.dependencies]
+tauri-plugin-single-instance = "2.0.0-rc.0"

easytier-gui/src-tauri/src/lib.rs

@@ -298,6 +298,19 @@ pub fn run() {
         ));
     }
 
+    #[cfg(not(any(target_os = "android", target_os = "ios")))]
+    {
+        builder = builder
+            .plugin(tauri_plugin_single_instance::init(|app, args, cwd| {
+                app.webview_windows()
+                    .values()
+                    .next()
+                    .expect("Sorry, no window found")
+                    .set_focus()
+                    .expect("Can't Bring Window to Focus");
+            }));
+    }
+
     builder
         .plugin(tauri_plugin_os::init())
         .plugin(tauri_plugin_clipboard_manager::init())