Fix Agent and WideningTransformer and ClassPatcher

AccessWidener/src/main/java/de/steamwar/Agent.java

@@ -19,7 +19,11 @@
 
 package de.steamwar;
 
+import java.io.File;
+import java.io.IOException;
 import java.lang.instrument.Instrumentation;
+import java.util.ArrayList;
+import java.util.List;
 import java.util.logging.Logger;
 
 /**
@@ -38,14 +42,11 @@ import java.util.logging.Logger;
  */
 public class Agent {
     private Agent() {
-        /* This utility class should not be instantiated */
+        throw new IllegalStateException("Utility class");
     }
 
     private static final Logger LOG = Logger.getLogger("AccessWidenerAgent");
 
-    // Exposed so tests or other code can inspect the live transformer
-    static volatile WideningTransformer transformer;
-
     // -javaagent: startup
     public static void premain(String args, Instrumentation inst) {
         init(inst);
@@ -54,13 +55,22 @@ public class Agent {
     private static void init(Instrumentation inst) {
         LOG.info("[AccessWidener] Agent initialising.");
 
-        WideningTransformer t = new WideningTransformer(inst);
-        transformer = t;
-
-        // --- Phase 2: register transformer for future class loads ---
-        // canRetransform=true so we can call retransformClasses() later
-        inst.addTransformer(t, true);
+        List<AccessWidenerEntry> entries = new ArrayList<>();
+        File file = new File(new File(".").getAbsoluteFile(), "plugins/");
+        File[] files = file.listFiles();
+        if (files == null) files = new File[0];
+        for (File jarFile : files) {
+            if (!jarFile.isFile()) continue;
+            if (!jarFile.getName().endsWith(".jar")) continue;
+            try {
+                entries.addAll(Utils.findAndParseAccessWideners(jarFile.toPath()));
+            } catch (IOException e) {
+                LOG.warning("Failed to parse access wideners from " + jarFile.getAbsolutePath());
+            }
+        }
+        LOG.info("[AccessWidener] Loaded " + entries.size() + " access wideners.");
 
+        inst.addTransformer(new WideningTransformer(entries), false);
         LOG.info("[AccessWidener] Agent ready.");
     }
 }