fix: Fix multiremote capabilities structure handling in Tauri service

- Fix launcher to properly access tauri:options in multiremote capabilities structure
- Add type assertion to handle multiremote vs standard capabilities differences
- This should resolve 'Tauri application path not found in capabilities' warning

Author: goosewobbler

fixtures/build-cjs/simple-ts-config/rollup.config.js

@@ -1,6 +1,6 @@
 // rollup.config.js (generated by @wdio/electron-bundler)
 // Package: [email protected]
-// Generated: 2025-10-29T12:09:46.913Z
+// Generated: 2025-10-29T12:29:17.701Z
 // Configurations: 2 (ESM, CJS)
 
 // This file was auto-generated. Modifications will be overwritten.

fixtures/build-esm/simple-ts-config/rollup.config.js

@@ -1,6 +1,6 @@
 // rollup.config.js (generated by @wdio/electron-bundler)
 // Package: [email protected]
-// Generated: 2025-10-29T12:09:48.892Z
+// Generated: 2025-10-29T12:29:19.759Z
 // Configurations: 2 (ESM, CJS)
 
 // This file was auto-generated. Modifications will be overwritten.

fixtures/tauri-apps/basic/src-tauri/src/main.rs

@@ -130,11 +130,11 @@ async fn write_file(path: String, contents: String, _options: Option<FileOperati
     // Log immediately at the start of the function
     let _ = std::fs::write("/tmp/tauri-debug.log", "🔍 Rust: write_file function entry point reached\n");
     println!("🔍 Rust: write_file function entry point reached");
-    
+
     let log_msg = format!("🔍 Rust: write_file called with path: '{}', contents length: {}, options: {:?}\n", path, contents.len(), _options);
     let _ = std::fs::write("/tmp/tauri-debug.log", log_msg.as_bytes());
     println!("🔍 Rust: write_file called with path: '{}', contents length: {}, options: {:?}", path, contents.len(), _options);
-    
+
     // Add more detailed logging
     let log_msg2 = format!("🔍 Rust: About to write file '{}' with {} bytes\n", path, contents.len());
     let _ = std::fs::write("/tmp/tauri-debug.log", log_msg2.as_bytes());
@@ -184,11 +184,11 @@ async fn test_simple_params(param1: String, param2: i32) -> Result<String, Strin
     // Log immediately at the start of the function
     let _ = std::fs::write("/tmp/tauri-debug.log", "🔍 Rust: test_simple_params function entry point reached\n");
     println!("🔍 Rust: test_simple_params function entry point reached");
-    
+
     let log_msg = format!("🔍 Rust: test_simple_params called with param1: '{}', param2: {}\n", param1, param2);
     let _ = std::fs::write("/tmp/tauri-debug.log", log_msg.as_bytes());
     println!("🔍 Rust: test_simple_params called with param1: '{}', param2: {}", param1, param2);
-    
+
     Ok(format!("Received: param1='{}', param2={}", param1, param2))
 }
 
@@ -240,7 +240,7 @@ async fn write_clipboard(content: String) -> Result<(), String> {
 
 fn main() {
     let _ = std::fs::write("/tmp/tauri-debug.log", "🔍 Rust: Tauri v2 app starting...\n");
-    
+
     tauri::Builder::default()
         .plugin(tauri_plugin_fs::init())
         .invoke_handler(tauri::generate_handler![

packages/tauri-service/src/launcher.ts

@@ -105,7 +105,10 @@ export default class TauriLaunchService {
 
     // App binary path is already resolved in onPrepare
     // The application path now points directly to the binary (not the app directory)
-    const appBinaryPath = firstCap?.['tauri:options']?.application;
+    // In multiremote, the structure is { capabilities: { 'tauri:options': ... } }
+    // For standard capabilities, it's directly { 'tauri:options': ... }
+    const appBinaryPath =
+      (firstCap as any)?.capabilities?.['tauri:options']?.application || firstCap?.['tauri:options']?.application;
     if (!appBinaryPath) {
       log.warn('Tauri application path not found in capabilities, skipping diagnostics');
       log.debug(`Capabilities structure: ${JSON.stringify(firstCap, null, 2)}`);
@@ -116,13 +119,13 @@ export default class TauriLaunchService {
     log.debug(`Using app binary path: ${this.appBinaryPath}`);
 
     // Verify the binary exists (it should, since we resolved it in onPrepare)
-    if (!existsSync(this.appBinaryPath)) {
+    if (!existsSync(this.appBinaryPath!)) {
       log.error(`Tauri binary not found: ${this.appBinaryPath}`);
       return;
     }
 
     // Run environment diagnostics
-    await this.diagnoseEnvironment(this.appBinaryPath);
+    await this.diagnoseEnvironment(this.appBinaryPath!);
 
     log.debug(`Tauri worker session started: ${cid}`);
   }