fix: 通过执行jar安装的版本不存在jar文件时启动失败

Author: ShirosakiMio

FCLCore/src/main/java/com/tungsten/fclcore/launch/DefaultLauncher.java

@@ -205,9 +205,13 @@ private CommandBuilder generateCommandLine() throws IOException {
 
         Set<String> classpath = repository.getClasspath(version);
         classpath.add(FCLPath.MIO_LAUNCH_WRAPPER);
-        File jar = new File(repository.getVersionRoot(version.getId()), version.getId() + ".jar");
-//        if (!jar.exists() || !jar.isFile())
-//            throw new IOException("Minecraft jar does not exist");
+        File jar = repository.getVersionJar(version);
+        if (!jar.exists() || !jar.isFile()){
+            String inherits = version.getInheritsFrom();
+            if (!inherits.isEmpty()) {
+                jar = repository.getVersionJar(inherits);
+            }
+        }
         classpath.add(jar.getAbsolutePath());
 
         // Provided Minecraft arguments