skip target if it already exists

src/main.rs

@@ -1,5 +1,5 @@
 use core::panic;
-use std::{collections::HashMap, env::args, fs::read_to_string, process::exit};
+use std::{collections::HashMap, fs::read_to_string, process::exit};
 
 use clap::Parser;
 
@@ -56,6 +56,9 @@ fn main() {
     let mut target_list: TargetList = TargetList(HashMap::new());
     for order in &inheritance_order {
         for name in order.into_iter().rev() {
+            if let Some(_) = target_list.0.get(name as &str) {
+                continue;
+            }
             let opts = target_option_list.0.get(name as &str).unwrap();
             let deser = deser_target_list.get(name as &str).unwrap();
 

src/parse_deser/target_list.rs

@@ -1,5 +1,4 @@
 use super::*;
-use crate::deser::*;
 use std::collections::HashMap;
 
 #[derive(Debug, Clone)]