Read defaults from /etc if available (#107)

* Read defaults from /etc if available

* Don't return there

main.go

@@ -52,11 +52,9 @@ func runLoop(vid *video.Video) {
 
 func main() {
 	var GLVersion uint
-	var fullscreen bool
 	flag.StringVar(&state.Global.CorePath, "L", "", "Path to the libretro core")
 	flag.BoolVar(&state.Global.Verbose, "v", false, "Verbose logs")
 	flag.UintVar(&GLVersion, "glver", 32, "OpenGL version")
-	flag.BoolVar(&fullscreen, "fullscreen", false, "Force starting in full screen mode")
 	flag.Parse()
 	args := flag.Args()
 
@@ -71,11 +69,6 @@ func main() {
 		log.Println("[Settings]: Using default settings")
 	}
 
-	if fullscreen {
-		settings.Current.VideoFullscreen = fullscreen
-		settings.Save()
-	}
-
 	if err := glfw.Init(); err != nil {
 		log.Fatalln("failed to initialize glfw:", err)
 	}

settings/settings.go

@@ -45,12 +45,17 @@ var Defaults = defaultSettings()
 // If the settings file doesn't exists, it will return an error and
 // set all the settings to their default value.
 func Load() error {
+	defer Save()
+
+	usr, _ := user.Current()
+
 	// Set default values for settings
 	Current = Defaults
 
-	usr, err := user.Current()
-	if err != nil {
-		return err
+	// If /etc/ludo.json exists, override the defaults
+	if _, err := os.Stat("/etc/ludo.json"); !os.IsNotExist(err) {
+		b, _ := ioutil.ReadFile("/etc/ludo.json")
+		json.Unmarshal(b, &Current)
 	}
 
 	b, err := ioutil.ReadFile(usr.HomeDir + "/.ludo/settings.json")
@@ -59,15 +64,15 @@ func Load() error {
 	}
 	err = json.Unmarshal(b, &Current)
 
-	Save()
-
 	return err
 }
 
 // Save saves the current configuration to the home directory
 func Save() error {
 	usr, _ := user.Current()
 
+	os.MkdirAll(usr.HomeDir+"/.ludo", os.ModePerm)
+
 	b, _ := json.MarshalIndent(Current, "", "  ")
 	f, err := os.Create(usr.HomeDir + "/.ludo/settings.json")
 	if err != nil {