rework service.OnStartup to close applicatoin on error

CHANGELOG.md

fix index out of bounds potential

mkdocs-website/docs/en/changelog.md

@@ -32,6 +32,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
   in [#3888](https://github.com/wailsapp/wails/pull/3888)
 
 ### Changed
+- `service.OnStartup` now shutdowns the application on error and runs `service.OnShutdown`for any prior services that started by @atterpac in [#3920](https://github.com/wailsapp/wails/pull/3920)
 - Refactored systray click messaging to better align with user interactions by @atterpac in [#3907](https://github.com/wailsapp/wails/pull/3907)
 - Asset embed to include `all:frontend/dist` to support frameworks that generate subfolders by @atterpac in [#3887](https://github.com/wailsapp/wails/pull/3887)
 - Taskfile refactor by [leaanthony](https://github.com/leaanthony) in [#3748](https://github.com/wailsapp/wails/pull/3748)

v3/pkg/application/application.go

@@ -136,16 +136,26 @@ func New(appOptions Options) *App {
 		result.handleFatalError(fmt.Errorf("Fatal error in application initialisation: " + err.Error()))
 	}
 
-	for _, service := range appOptions.Services {
+	for i, service := range appOptions.Services {
 		if thisService, ok := service.instance.(ServiceStartup); ok {
 			err := thisService.OnStartup(result.ctx, service.options)
 			if err != nil {
 				name := service.options.Name
 				if name == "" {
 					name = getServiceName(service.instance)
 				}
-				globalApplication.Logger.Error("OnStartup() failed:", "service", name, "error", err.Error())
-				continue
+				globalApplication.Logger.Error("OnStartup() failed shutting down application:", "service", name, "error", err.Error())
+				// Run shutdown on all services that have already started
+				for _, service := range appOptions.Services[:i] {
+					if thisService, ok := service.instance.(ServiceShutdown); ok {
+						err := thisService.OnShutdown()
+						if err != nil {
+							globalApplication.Logger.Error("Error shutting down service: " + err.Error())
+						}
+					}
+				}
+				// Shutdown the application
+				os.Exit(1)
 			}
 		}
 	}