Fix RunApplication

README.md

@@ -1,4 +1,6 @@
 # nasin
 
+[![Go Reference](https://pkg.go.dev/badge/git.tebibyte.media/tomo/nasin.svg)](https://pkg.go.dev/git.tebibyte.media/tomo/nasin)
+
 Nasin provides an easy way to write applications with Tomo. Parts of Tomo that
 aren't the GUI toolkit may be found here.

application.go

@@ -1,7 +1,9 @@
 package nasin
 
+import "log"
 import "image"
 import "git.tebibyte.media/tomo/tomo"
+import "git.tebibyte.media/tomo/nasin/internal/registry"
 
 // Application represents an application object.
 type Application interface {
@@ -9,7 +11,7 @@ type Application interface {
 	Describe () ApplicationDescription
 
 	// Init performs the initial setup of the application.
-	Init ()
+	Init () error
 }
 
 // ApplicationDescription describes the name and type of an application.
@@ -74,9 +76,16 @@ type ApplicationRole string; const (
 	RoleChecklist         ApplicationRole = "Checklist"
 )
 
-// RunApplication is like Run, but runs an application.
-func RunApplication (application Application) error {
-	return tomo.Run(application.Init)
+// RunApplication is like tomo.Run, but runs an application. If something fails
+// to initialize, an error is written to the standard logger.
+func RunApplication (application Application) {
+	err := registry.Init()
+	if err != nil { log.Fatal("nasin: could not init registry:", err) }
+	err = tomo.Run(func () {
+		err := application.Init()
+		if err != nil { log.Fatal("nasin: could not run application:", err) }
+	})
+	if err != nil { log.Fatal("nasin: could not run application:", err) }
 }
 
 // NewApplicationWindow creates a window for an application. It will

internal/registry/doc.go

@@ -0,0 +1,2 @@
+// Package registry provides platform-dependent components at compile time.
+package registry

internal/registry/registry_unix.go

@@ -1,8 +1,10 @@
-package nasin
+//go:build unix && (!darwin)
+package registry
 
 import "git.tebibyte.media/tomo/x"
 import "git.tebibyte.media/tomo/tomo"
 
-func init () {
+func Init () error {
 	tomo.Register(1, x.NewBackend)
+	return nil
 }