1.1 - Only setup transformer once

Author: ZeroMemes

build.gradle

@@ -3,7 +3,7 @@ plugins {
 }
 
 group 'io.github.impactdevelopment'
-version '1.0'
+version '1.1'
 
 sourceCompatibility = targetCompatibility = 1.8
 compileJava {

src/main/java/io/github/impactdevelopment/simpletweaker/SimpleTweaker.java

@@ -37,6 +37,8 @@ public class SimpleTweaker implements ITweaker {
 
     public static final Logger LOGGER = LogManager.getLogger("SimpleTweaker");
 
+    private static boolean setupTransformer = false;
+
     /**
      * The raw game launch arguments that are provided in {@link SimpleTweaker#acceptOptions(List, File, File, String)}
      */
@@ -52,8 +54,7 @@ public void acceptOptions(List<String> args, File gameDir, File assetsDir, Strin
 
     @Override
     public void injectIntoClassLoader(LaunchClassLoader classLoader) {
-        classLoader.addClassLoaderExclusion("io.github.impactdevelopment.simpletweaker.");
-        classLoader.registerTransformer(SimpleTransformer.class.getName());
+        doInitialSetup(classLoader);
     }
 
     @Override
@@ -88,4 +89,12 @@ private void addArg(String label, String value) {
             this.args.add(value);
         }
     }
+
+    private static void doInitialSetup(LaunchClassLoader classLoader) {
+        if (!setupTransformer) {
+            classLoader.addClassLoaderExclusion("io.github.impactdevelopment.simpletweaker.");
+            classLoader.registerTransformer(SimpleTransformer.class.getName());
+            setupTransformer = true;
+        }
+    }
 }