refactor: move usage, aliases to outside var

main.go

@@ -11,14 +11,24 @@ import (
 )
 
 const (
-	appName = "license"
+	appName  = "license"
+	appUsage = "generate LICENSE"
 
+	// flags
 	outputFlag = "output"
 
+	// flag usages
+	outputUsage = "output directory"
+
 	currentDir      = "."
 	licenseFilename = "LICENSE"
 )
 
+var (
+	// flag aliases
+	outputAliases = []string{"o"}
+)
+
 var fmtErr = color.New(color.FgRed)
 
 func main() {
@@ -26,12 +36,12 @@ func main() {
 
 	app := &cli.App{
 		Name:  appName,
-		Usage: "generate LICENSE",
+		Usage: appUsage,
 		Flags: []cli.Flag{
 			&cli.StringFlag{
 				Name:        outputFlag,
-				Aliases:     []string{"o"},
-				Usage:       "output directory",
+				Aliases:     outputAliases,
+				Usage:       outputUsage,
 				DefaultText: currentDir,
 			},
 		},