Workaround hang on ChromeOS.

Ebitengine-side bug: hajimehoshi/ebiten#3091

Workaround is simply enabling --runnable_when_unfocused when on
ChromeOS.

Fixes issue #394.

internal/aaaaxy/init.go

@@ -52,7 +52,10 @@ var (
 	runnableWhenUnfocused = flag.Bool("runnable_when_unfocused", flag.SystemDefault(map[string]bool{
 		// Focus didn't quite work well on JS. TODO: try testing again later.
 		"js/*": true,
-		"*/*":  false,
+		// Focus doesn't work well with ChromeOS's sommelier either.
+		"chromeos/*": true,
+		// Otherwise default to pausing when focus is gone.
+		"*/*": false,
 	}), "keep running the game even when not focused")
 	dumpLoadingFractions = flag.String("dump_loading_fractions", "", "file name to dump actual loading fractions to")
 	debugJustInit        = flag.Bool("debug_just_init", false, "just init everything, then quit right away")

internal/flag/flag.go

@@ -39,11 +39,17 @@ var (
 // SystemDefault performs a GOOS/GOARCH dependent value lookup to be used in flag defaults.
 // Map keys shall be */*, GOOS/*, */GOARCH or GOOS/GOARCH.
 func SystemDefault[T any](m map[string]T) T {
-	k := fmt.Sprintf("%v/%v", runtime.GOOS, runtime.GOARCH)
+	goos := runtime.GOOS
+	if goos == "linux" {
+		if os.Getenv("SOMMELIER_VERSION") != "" {
+			goos = "chromeos"
+		}
+	}
+	k := fmt.Sprintf("%v/%v", goos, runtime.GOARCH)
 	if val, found := m[k]; found {
 		return val
 	}
-	k = fmt.Sprintf("%v/*", runtime.GOOS)
+	k = fmt.Sprintf("%v/*", goos)
 	if val, found := m[k]; found {
 		return val
 	}