feat: add --override flag

lib/app.go

@@ -7,6 +7,7 @@ type App struct {
 	ApiInterval         int // How many ms to wait between one call to apis and the other
 	NoFallback          bool
 	StopOnFail          bool
+	OverrideDownload    bool
 }
 
 func NewApp() App {

lib/download.go

@@ -199,7 +199,7 @@ func (app *App) DownloadTrack(url string, outputFile string, service string, qua
 		return err
 	}
 
-	if fileExists {
+	if fileExists && !app.OverrideDownload {
 		app.log("File " + outputFile + " already exists")
 		return nil
 	}

main.go

@@ -54,15 +54,18 @@ func main() {
 					&cli.BoolFlag{
 						Name:        "no-fallback",
 						Usage:       "do not fallback in case a source is not found",
-						DefaultText: strconv.FormatBool(app.NoFallback),
 						Destination: &app.NoFallback,
 					},
 					&cli.BoolFlag{
 						Name:        "stop-on-fail",
 						Usage:       "continue on download failure",
-						DefaultText: strconv.FormatBool(app.StopOnFail),
 						Destination: &app.StopOnFail,
 					},
+					&cli.BoolFlag{
+						Name:        "override",
+						Usage:       "override already downloaded songs",
+						Destination: &app.OverrideDownload,
+					},
 				},
 				Action: func(ctx context.Context, cmd *cli.Command) error {
 					song_url := cmd.Args().First()