Process parse provided dir itself

cmd/main.go

@@ -32,7 +32,7 @@ func main() {
 		log.Fatalf("failed to list subdirs: %v", err)
 	}
 
-	for _, dir := range directories {
+	for _, dir := range append(directories, *directory) {
 		fset := token.NewFileSet()
 		packages, err := parser.ParseDir(fset, dir, nil, 0)
 		if err != nil {