Reapply "Fix ItemStack packet id limited by short" (#23) (#37) (#41)

Co-authored-by: RecursivePineapple <recursive_pineapple@proton.me>

build.gradle

@@ -3,3 +3,8 @@
 plugins {
     id 'com.gtnewhorizons.gtnhconvention'
 }
+
+minecraft {
+    //extraRunJvmArguments.add("-Dccc.dev.runtimePublic=true")
+    //extraRunJvmArguments.add("-Dccc.dev.deobfuscate=true")
+}

gradle.properties

@@ -14,7 +14,7 @@ modId = CodeChickenCore
 modGroup = codechicken
 
 # Whether to use modGroup as the maven publishing group.
-# Due to a history of using JitPack, the default is com.github.GTNewHorizons for all mods.
+# When false, com.github.GTNewHorizons is used.
 useModGroupForPublishing = false
 
 # Updates your build.gradle and settings.gradle automatically whenever an update is available.
@@ -90,7 +90,9 @@ usesMixinDebug = false
 # Specify the location of your implementation of IMixinConfigPlugin. Leave it empty otherwise.
 mixinPlugin =
 
-# Specify the package that contains all of your Mixins. You may only place Mixins in this package or the build will fail!
+# Specify the package that contains all of your Mixins. The package must exist or
+# the build will fail. If you have a package property defined in your mixins.<modid>.json,
+# it must match with this or the build will fail.
 mixinsPackage =
 
 # Specify the core mod entry class if you use a core mod. This class must implement IFMLLoadingPlugin!
@@ -145,7 +147,7 @@ modrinthProjectId = codechickencore-unofficial
 #       type can be one of [project, version],
 #       and the name is the Modrinth project or version slug/id of the other mod.
 # Example: required-project:fplib;optional-project:gasstation;incompatible-project:gregtech
-# Note: GTNH Mixins is automatically set as a required dependency if usesMixins = true
+# Note: UniMixins is automatically set as a required dependency if usesMixins = true.
 modrinthRelations =
 
 # Publishing to CurseForge requires you to set the CURSEFORGE_TOKEN environment variable to one of your CurseForge API tokens.
@@ -166,6 +168,12 @@ curseForgeRelations =
 # projects. New projects should not use this parameter.
 # customArchiveBaseName =
 
+# Optional parameter to customize the default working directory used by the runClient* tasks. Relative to the project directory.
+# runClientWorkingDirectory = run/client
+
+# Optional parameter to customize the default working directory used by the runServer* tasks. Relative to the project directory.
+# runServerWorkingDirectory = run/server
+
 # Optional parameter to have the build automatically fail if an illegal version is used.
 # This can be useful if you e.g. only want to allow versions in the form of '1.1.xxx'.
 # The check is ONLY performed if the version is a git tag.

gradle/wrapper/gradle-wrapper.properties

@@ -1,6 +1,6 @@
 distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-8.11.1-bin.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-8.13-bin.zip
 networkTimeout=10000
 validateDistributionUrl=true
 zipStoreBase=GRADLE_USER_HOME

gradlew

@@ -86,8 +86,7 @@ done
 # shellcheck disable=SC2034
 APP_BASE_NAME=${0##*/}
 # Discard cd standard output in case $CDPATH is set (https://github.com/gradle/gradle/issues/25036)
-APP_HOME=$( cd -P "${APP_HOME:-./}" > /dev/null && printf '%s
-' "$PWD" ) || exit
+APP_HOME=$( cd -P "${APP_HOME:-./}" > /dev/null && printf '%s\n' "$PWD" ) || exit
 
 # Use the maximum available, or set MAX_FD != -1 to use that value.
 MAX_FD=maximum
@@ -206,7 +205,7 @@ fi
 DEFAULT_JVM_OPTS='"-Xmx64m" "-Xms64m"'
 
 # Collect all arguments for the java command:
-#   * DEFAULT_JVM_OPTS, JAVA_OPTS, JAVA_OPTS, and optsEnvironmentVar are not allowed to contain shell fragments,
+#   * DEFAULT_JVM_OPTS, JAVA_OPTS, and optsEnvironmentVar are not allowed to contain shell fragments,
 #     and any embedded shellness will be escaped.
 #   * For example: A user cannot expect ${Hostname} to be expanded, as it is an environment variable and will be
 #     treated as '${Hostname}' itself on the command line.

settings.gradle

@@ -17,7 +17,7 @@ pluginManagement {
 }
 
 plugins {
-    id 'com.gtnewhorizons.gtnhsettingsconvention' version '1.0.30'
+    id 'com.gtnewhorizons.gtnhsettingsconvention' version '1.0.48'
 }
 
 

src/main/java/codechicken/core/ClassDiscoverer.java

@@ -11,6 +11,7 @@ import java.util.zip.ZipFile;
 
 import net.minecraft.launchwrapper.Launch;
 
+import org.objectweb.asm.ClassReader;
 import org.objectweb.asm.tree.ClassNode;
 
 import com.google.common.collect.ImmutableList;
@@ -22,6 +23,7 @@ import cpw.mods.fml.common.Loader;
 import cpw.mods.fml.common.ModClassLoader;
 import cpw.mods.fml.relauncher.CoreModManager;
 
+@SuppressWarnings("unused")
 public class ClassDiscoverer {
 
     public IStringMatcher matcher;
@@ -35,17 +37,12 @@ public class ClassDiscoverer {
         for (int i = 0; i < superclasses.length; i++)
             this.superclasses[i] = superclasses[i].getName().replace('.', '/');
 
-        classes = new ArrayList<Class<?>>();
+        classes = new ArrayList<>();
         modClassLoader = (ModClassLoader) Loader.instance().getModClassLoader();
     }
 
     public ClassDiscoverer(Class<?>... superclasses) {
-        this(new IStringMatcher() {
-
-            public boolean matches(String test) {
-                return true;
-            }
-        }, superclasses);
+        this(test -> true, superclasses);
     }
 
     public ArrayList<Class<?>> findClasses() {
@@ -63,7 +60,7 @@ public class ClassDiscoverer {
             byte[] bytes = Launch.classLoader.getClassBytes(classname);
             if (bytes == null) return;
 
-            ClassNode cnode = ASMHelper.createClassNode(bytes);
+            ClassNode cnode = ASMHelper.createClassNode(bytes, ClassReader.SKIP_CODE);
             for (String superclass : superclasses)
                 if (!cnode.interfaces.contains(superclass) && !cnode.superName.equals(superclass)) return;
 
@@ -86,7 +83,7 @@ public class ClassDiscoverer {
         List<String> knownLibraries = ImmutableList.<String>builder().addAll(modClassLoader.getDefaultLibraries())
                 .addAll(CoreModManager.getLoadedCoremods()).build();
         File[] minecraftSources = modClassLoader.getParentSources();
-        HashSet<String> searchedSources = new HashSet<String>();
+        HashSet<String> searchedSources = new HashSet<>();
         for (File minecraftSource : minecraftSources) {
             if (searchedSources.contains(minecraftSource.getAbsolutePath())) continue;
             searchedSources.add(minecraftSource.getAbsolutePath());

src/main/java/codechicken/core/asm/CodeChickenAccessTransformer.java

@@ -5,32 +5,19 @@ import java.lang.reflect.Field;
 
 import com.google.common.collect.ImmutableBiMap;
 
-import codechicken.lib.asm.ObfMapping;
 import cpw.mods.fml.common.asm.transformers.AccessTransformer;
 import cpw.mods.fml.common.asm.transformers.deobf.FMLDeobfuscatingRemapper;
 
+// This AccessTransformer will make all minecraft classes public at runtime in MCP just as they are in modloader.
+// You should ONLY use this when you are testing with a mod that relies on runtime publicity and doesn't include
+// access transformers. Such mods are doing the wrong thing and should be fixed.
 public class CodeChickenAccessTransformer extends AccessTransformer {
 
-    private static boolean makeAllPublic;
-    private static Field f_classNameBiMap;
+    private static final Field f_classNameBiMap;
+    @SuppressWarnings("FieldMayBeFinal")
     private static Object emptyMap = ImmutableBiMap.of();
 
-    public CodeChickenAccessTransformer() throws IOException {
-        super();
-        loadPublicConfig();
-    }
-
-    private void loadPublicConfig() {
-        if (ObfMapping.obfuscated) return;
-
-        makeAllPublic = CodeChickenCoreModContainer.config.getTag("dev.runtimePublic").setComment(
-                "Enabling this setting will make all minecraft classes public at runtime in MCP just as they are in modloader."
-                        + "\nYou should ONLY use this when you are testing with a mod that relies on runtime publicity and doesn't include access transformers."
-                        + "\nSuch mods are doing the wrong thing and should be fixed.")
-                .getBooleanValue(false);
-
-        if (!makeAllPublic) return;
-
+    static {
         try {
             f_classNameBiMap = FMLDeobfuscatingRemapper.class.getDeclaredField("classNameBiMap");
             f_classNameBiMap.setAccessible(true);
@@ -39,16 +26,18 @@ public class CodeChickenAccessTransformer extends AccessTransformer {
         }
     }
 
+    public CodeChickenAccessTransformer() throws IOException {}
+
     @Override
     public byte[] transform(String name, String transformedName, byte[] bytes) {
-        boolean setPublic = makeAllPublic && name.startsWith("net.minecraft.");
+        boolean setPublic = name.startsWith("net.minecraft.");
         if (setPublic) setClassMap(name);
         bytes = super.transform(name, transformedName, bytes);
         if (setPublic) restoreClassMap();
         return bytes;
     }
 
-    private void restoreClassMap() {
+    private static void restoreClassMap() {
         try {
             f_classNameBiMap.set(FMLDeobfuscatingRemapper.INSTANCE, emptyMap);
         } catch (Exception e) {
@@ -56,7 +45,7 @@ public class CodeChickenAccessTransformer extends AccessTransformer {
         }
     }
 
-    private void setClassMap(String name) {
+    private static void setClassMap(String name) {
         try {
             f_classNameBiMap.set(FMLDeobfuscatingRemapper.INSTANCE, ImmutableBiMap.of(name.replace('.', '/'), ""));
         } catch (Exception e) {

src/main/java/codechicken/core/asm/CodeChickenCoreModContainer.java

@@ -1,6 +1,5 @@
 package codechicken.core.asm;
 
-import java.io.File;
 import java.util.LinkedList;
 import java.util.List;
 
@@ -13,7 +12,6 @@ import codechicken.core.ClientUtils;
 import codechicken.core.featurehack.LiquidTextures;
 import codechicken.core.internal.CCCEventHandler;
 import codechicken.core.launch.CodeChickenCorePlugin;
-import codechicken.lib.config.ConfigFile;
 import cpw.mods.fml.common.DummyModContainer;
 import cpw.mods.fml.common.FMLCommonHandler;
 import cpw.mods.fml.common.LoadController;
@@ -26,14 +24,6 @@ import cpw.mods.fml.common.versioning.VersionRange;
 
 public class CodeChickenCoreModContainer extends DummyModContainer {
 
-    public static ConfigFile config;
-
-    public static void loadConfig() {
-        if (config == null)
-            config = new ConfigFile(new File(CodeChickenCorePlugin.minecraftDir, "config/CodeChickenCore.cfg"))
-                    .setComment("CodeChickenCore configuration file.");
-    }
-
     public CodeChickenCoreModContainer() {
         super(getModMetadata());
     }

src/main/java/codechicken/core/asm/DefaultImplementationTransformer.java

@@ -7,35 +7,50 @@ import java.util.HashSet;
 import java.util.LinkedList;
 
 import net.minecraft.launchwrapper.IClassTransformer;
-import net.minecraft.launchwrapper.LaunchClassLoader;
+import net.minecraft.launchwrapper.Launch;
 
 import org.objectweb.asm.tree.ClassNode;
 import org.objectweb.asm.tree.MethodNode;
 
 import codechicken.lib.asm.ASMHelper;
-import codechicken.lib.asm.ClassHeirachyManager;
 import codechicken.lib.asm.ObfMapping;
+import cpw.mods.fml.relauncher.FMLRelaunchLog;
 
 public class DefaultImplementationTransformer implements IClassTransformer {
 
-    private static LaunchClassLoader cl = (LaunchClassLoader) ClassHeirachyManager.class.getClassLoader();
+    private static final HashMap<String, InterfaceImpl> impls = new HashMap<>();
 
-    private static ClassNode getClassNode(String name) {
-        try {
-            return ASMHelper.createClassNode(cl.getClassBytes(name.replace('/', '.')));
-        } catch (IOException e) {
-            throw new RuntimeException(e);
+    public static void registerDefaultImpl(String iname, String cname) {
+        if (impls.isEmpty()) {
+            String name = DefaultImplementationTransformer.class.getName();
+            FMLRelaunchLog.finer("Registering transformer %s", name);
+            Launch.classLoader.registerTransformer(name);
         }
+        impls.put(iname.replace('.', '/'), new InterfaceImpl(iname, cname));
+    }
+
+    @Override
+    public byte[] transform(String name, String transformedName, byte[] bytes) {
+        if (transformedName.startsWith("net.minecraft") || impls.isEmpty()) return bytes;
+
+        ClassNode cnode = ASMHelper.createClassNode(bytes);
+        boolean changed = false;
+        for (String iname : cnode.interfaces) {
+            InterfaceImpl impl = impls.get(iname);
+            if (impl != null) changed |= impl.patch(cnode);
+        }
+
+        return changed ? ASMHelper.createBytes(cnode, 0) : bytes;
     }
 
     static class InterfaceImpl {
 
         public final String iname;
-        public ArrayList<MethodNode> impls = new ArrayList<MethodNode>();
+        public ArrayList<MethodNode> impls = new ArrayList<>();
 
         public InterfaceImpl(String iname, String cname) {
             this.iname = iname;
-            HashSet<String> names = new HashSet<String>();
+            HashSet<String> names = new HashSet<>();
             ClassNode inode = getClassNode(iname);
             for (MethodNode method : inode.methods) names.add(method.name + method.desc);
 
@@ -47,7 +62,7 @@ public class DefaultImplementationTransformer implements IClassTransformer {
         }
 
         public boolean patch(ClassNode cnode) {
-            LinkedList<String> names = new LinkedList<String>();
+            LinkedList<String> names = new LinkedList<>();
             for (MethodNode method : cnode.methods) {
                 ObfMapping m = new ObfMapping(cnode.name, method.name, method.desc).toRuntime();
                 names.add(m.s_name + m.s_desc);
@@ -69,25 +84,13 @@ public class DefaultImplementationTransformer implements IClassTransformer {
             }
             return changed;
         }
-    }
 
-    private static HashMap<String, InterfaceImpl> impls = new HashMap<String, InterfaceImpl>();
-
-    public static void registerDefaultImpl(String iname, String cname) {
-        impls.put(iname.replace('.', '/'), new InterfaceImpl(iname, cname));
-    }
-
-    @Override
-    public byte[] transform(String name, String transformedName, byte[] bytes) {
-        if (transformedName.startsWith("net.minecraft") || impls.isEmpty()) return bytes;
-
-        ClassNode cnode = ASMHelper.createClassNode(bytes);
-        boolean changed = false;
-        for (String iname : cnode.interfaces) {
-            InterfaceImpl impl = impls.get(iname);
-            if (impl != null) changed |= impl.patch(cnode);
+        private static ClassNode getClassNode(String name) {
+            try {
+                return ASMHelper.createClassNode(Launch.classLoader.getClassBytes(name.replace('/', '.')));
+            } catch (IOException e) {
+                throw new RuntimeException(e);
+            }
         }
-
-        return changed ? ASMHelper.createBytes(cnode, 0) : bytes;
     }
 }

src/main/java/codechicken/core/asm/DelegatedTransformer.java

@@ -1,7 +1,5 @@
 package codechicken.core.asm;
 
-import static codechicken.core.launch.CodeChickenCorePlugin.logger;
-
 import java.io.ByteArrayOutputStream;
 import java.io.File;
 import java.io.IOException;
@@ -11,7 +9,9 @@ import java.lang.reflect.Method;
 import java.util.ArrayList;
 import java.util.Map;
 import java.util.Stack;
+import java.util.jar.Attributes;
 import java.util.jar.JarFile;
+import java.util.jar.Manifest;
 import java.util.zip.ZipEntry;
 
 import net.minecraft.launchwrapper.IClassTransformer;
@@ -21,14 +21,18 @@ import net.minecraft.launchwrapper.LaunchClassLoader;
 import org.objectweb.asm.ClassReader;
 import org.objectweb.asm.Opcodes;
 
+import codechicken.core.launch.CodeChickenCorePlugin;
+import cpw.mods.fml.relauncher.FMLRelaunchLog;
+
 public class DelegatedTransformer implements IClassTransformer {
 
-    private static ArrayList<IClassTransformer> delegatedTransformers;
-    private static Method m_defineClass;
-    private static Field f_cachedClasses;
+    private static final ArrayList<IClassTransformer> delegatedTransformers;
+    private static final Method m_defineClass;
+    private static final Field f_cachedClasses;
+    private static IClassTransformer[] transformers;
 
-    public DelegatedTransformer() {
-        delegatedTransformers = new ArrayList<IClassTransformer>();
+    static {
+        delegatedTransformers = new ArrayList<>();
         try {
             m_defineClass = ClassLoader.class
                     .getDeclaredMethod("defineClass", String.class, byte[].class, Integer.TYPE, Integer.TYPE);
@@ -41,14 +45,75 @@ public class DelegatedTransformer implements IClassTransformer {
     }
 
     @Override
-    public byte[] transform(String name, String tname, byte[] bytes) {
-        if (bytes == null) return null;
-        for (IClassTransformer trans : delegatedTransformers) bytes = trans.transform(name, tname, bytes);
-        return bytes;
+    public byte[] transform(String name, String transformedName, byte[] basicClass) {
+        if (basicClass == null) return null;
+        for (IClassTransformer t : transformers) {
+            basicClass = t.transform(name, transformedName, basicClass);
+        }
+        return basicClass;
+    }
+
+    public static void load() {
+        scanModsForDelegatedTransformers();
+        final int size = delegatedTransformers.size();
+        if (size == 0) {
+            CodeChickenCorePlugin.logger
+                    .debug("No delegated transformer found, skipping registration of main DelegatedTransformer.");
+            return;
+        }
+        CodeChickenCorePlugin.logger
+                .debug("Found " + size + " delegated transformers, registering main DelegatedTransformer.");
+        transformers = delegatedTransformers.toArray(new IClassTransformer[0]);
+        String name = DelegatedTransformer.class.getName();
+        FMLRelaunchLog.finer("Registering transformer %s", name);
+        Launch.classLoader.registerTransformer(name);
+    }
+
+    private static void scanModsForDelegatedTransformers() {
+        File modsDir = new File(CodeChickenCorePlugin.minecraftDir, "mods");
+        if (modsDir.exists()) {
+            final File[] files = modsDir.listFiles();
+            if (files != null) {
+                for (File file : files) {
+                    scanMod(file);
+                }
+            }
+        }
+        File versionModsDir = new File(
+                CodeChickenCorePlugin.minecraftDir,
+                "mods/" + CodeChickenCorePlugin.currentMcVersion);
+        if (versionModsDir.exists()) {
+            final File[] files = versionModsDir.listFiles();
+            if (files != null) {
+                for (File file : files) {
+                    scanMod(file);
+                }
+            }
+        }
+    }
+
+    private static void scanMod(File file) {
+        if (!file.getName().endsWith(".jar") && !file.getName().endsWith(".zip")) return;
+
+        try {
+            try (JarFile jar = new JarFile(file)) {
+                Manifest manifest = jar.getManifest();
+                if (manifest == null) return;
+                Attributes attr = manifest.getMainAttributes();
+                if (attr == null) return;
+
+                String transformer = attr.getValue("CCTransformer");
+                if (transformer != null) {
+                    addTransformer(transformer, jar, file);
+                }
+            }
+        } catch (Exception e) {
+            CodeChickenCorePlugin.logger.error("CodeChickenCore: Failed to read jar file: " + file.getName(), e);
+        }
     }
 
     public static void addTransformer(String transformer, JarFile jar, File jarFile) {
-        logger.debug("Adding CCTransformer: " + transformer);
+        CodeChickenCorePlugin.logger.debug("Adding CCTransformer: " + transformer);
         try {
             byte[] bytes;
             bytes = Launch.classLoader.getClassBytes(transformer);
@@ -107,7 +172,7 @@ public class DelegatedTransformer implements IClassTransformer {
                 byte[] depbytes = readFully(jar.getInputStream(entry));
                 defineDependancies(depbytes, jar, jarFile, depStack);
 
-                logger.debug("Defining dependancy: " + dependancy);
+                CodeChickenCorePlugin.logger.debug("Defining dependancy: " + dependancy);
 
                 defineClass(dependancy.replace('/', '.'), depbytes);
             }
@@ -128,7 +193,6 @@ public class DelegatedTransformer implements IClassTransformer {
         while ((r = stream.read()) != -1) {
             bos.write(r);
         }
-
         return bos.toByteArray();
     }
 }

src/main/java/codechicken/core/asm/MCPDeobfuscationTransformer.java

@@ -24,7 +24,6 @@ import com.google.common.collect.HashMultimap;
 import com.google.common.collect.Multimap;
 
 import codechicken.lib.asm.ASMHelper;
-import codechicken.lib.asm.ASMInit;
 import codechicken.lib.asm.CC_ClassWriter;
 import codechicken.lib.asm.ObfMapping;
 import codechicken.obfuscator.IHeirachyEvaluator;
@@ -35,15 +34,11 @@ import cpw.mods.fml.relauncher.IFMLLoadingPlugin;
 
 public class MCPDeobfuscationTransformer implements IClassTransformer, Opcodes, IHeirachyEvaluator {
 
-    static {
-        ASMInit.init();
-    }
-
     public static class LoadPlugin implements IFMLLoadingPlugin {
 
         @Override
         public String[] getASMTransformerClass() {
-            return new String[0];
+            return null;
         }
 
         @Override
@@ -118,26 +113,20 @@ public class MCPDeobfuscationTransformer implements IClassTransformer, Opcodes,
     }
 
     public static void load() {
-        CodeChickenCoreModContainer.loadConfig();
+        run = new ObfuscationRun(
+                false,
+                ObfMapping.MCPRemapper.getConfFiles(),
+                ObfuscationRun.fillDefaults(new HashMap<String, String>()));
+        run.obf.setHeirachyEvaluator(instance);
+        run.setQuiet().parseMappings();
+        Collections.addAll(excludedPackages, run.config.get("excludedPackages").split(";"));
 
-        if (CodeChickenCoreModContainer.config.getTag("dev.deobfuscate")
-                .setComment("set to true to completely deobfuscate mcp names")
-                .getBooleanValue(!ObfMapping.obfuscated)) {
-            run = new ObfuscationRun(
-                    false,
-                    ObfMapping.MCPRemapper.getConfFiles(),
-                    ObfuscationRun.fillDefaults(new HashMap<String, String>()));
-            run.obf.setHeirachyEvaluator(instance);
-            run.setQuiet().parseMappings();
-            Collections.addAll(excludedPackages, run.config.get("excludedPackages").split(";"));
-
-            if (ObfMapping.obfuscated) {
-                ObfMapping.loadMCPRemapper();
-                run.setSeargeConstants();
-                getTransformers().add(instance);
-            } else {
-                getTransformers().add(0, instance); // insert transformer as first.
-            }
+        if (ObfMapping.obfuscated) {
+            ObfMapping.loadMCPRemapper();
+            run.setSeargeConstants();
+            getTransformers().add(instance);
+        } else {
+            getTransformers().add(0, instance); // insert transformer as first.
         }
     }
 

src/main/java/codechicken/core/asm/TweakTransformer.java

@@ -5,14 +5,15 @@ import static codechicken.lib.asm.InsnComparator.findOnce;
 import java.util.Map;
 
 import net.minecraft.launchwrapper.IClassTransformer;
+import net.minecraft.launchwrapper.Launch;
 
 import org.objectweb.asm.Opcodes;
 import org.objectweb.asm.tree.JumpInsnNode;
 import org.objectweb.asm.tree.LabelNode;
 import org.objectweb.asm.tree.MethodNode;
 
+import codechicken.core.launch.CodeChickenCorePlugin;
 import codechicken.lib.asm.ASMBlock;
-import codechicken.lib.asm.ASMInit;
 import codechicken.lib.asm.ASMReader;
 import codechicken.lib.asm.ModularASMTransformer;
 import codechicken.lib.asm.ModularASMTransformer.MethodReplacer;
@@ -20,20 +21,29 @@ import codechicken.lib.asm.ModularASMTransformer.MethodTransformer;
 import codechicken.lib.asm.ModularASMTransformer.MethodWriter;
 import codechicken.lib.asm.ObfMapping;
 import codechicken.lib.config.ConfigTag;
+import cpw.mods.fml.relauncher.FMLRelaunchLog;
 
 public class TweakTransformer implements IClassTransformer, Opcodes {
 
-    static {
-        ASMInit.init();
-    }
-
-    private static ModularASMTransformer transformer = new ModularASMTransformer();
-    private static Map<String, ASMBlock> blocks = ASMReader.loadResource("/assets/codechickencore/asm/tweaks.asm");
+    private static final ModularASMTransformer transformer = new ModularASMTransformer();
+    private static final Map<String, ASMBlock> blocks = ASMReader
+            .loadResource("/assets/codechickencore/asm/tweaks.asm");
     public static ConfigTag tweaks;
 
     public static void load() {
-        CodeChickenCoreModContainer.loadConfig();
-        tweaks = CodeChickenCoreModContainer.config.getTag("tweaks")
+        loadTransformersFromConfig();
+        if (transformer.isEmpty()) {
+            CodeChickenCorePlugin.logger
+                    .debug("No tweaks parsed from config, skipping registration of TweakTransformer.");
+            return;
+        }
+        String name = TweakTransformer.class.getName();
+        FMLRelaunchLog.finer("Registering transformer %s", name);
+        Launch.classLoader.registerTransformer(name);
+    }
+
+    private static void loadTransformersFromConfig() {
+        tweaks = CodeChickenCorePlugin.config.getTag("tweaks")
                 .setComment("Various tweaks that can be applied to game mechanics.").useBraces();
         tweaks.removeTag("persistantLava");
 
@@ -103,7 +113,7 @@ public class TweakTransformer implements IClassTransformer, Opcodes {
     }
 
     @Override
-    public byte[] transform(String name, String tname, byte[] bytes) {
+    public final byte[] transform(String name, String tname, byte[] bytes) {
         return transformer.transform(name, bytes);
     }
 }

src/main/java/codechicken/core/launch/CodeChickenCorePlugin.java

@@ -9,9 +9,6 @@ import java.text.CharacterIterator;
 import java.text.StringCharacterIterator;
 import java.util.List;
 import java.util.Map;
-import java.util.jar.Attributes;
-import java.util.jar.JarFile;
-import java.util.jar.Manifest;
 
 import javax.swing.JEditorPane;
 import javax.swing.JOptionPane;
@@ -21,48 +18,87 @@ import javax.swing.event.HyperlinkListener;
 import org.apache.logging.log4j.LogManager;
 import org.apache.logging.log4j.Logger;
 
-import codechicken.core.asm.CodeChickenCoreModContainer;
 import codechicken.core.asm.DelegatedTransformer;
 import codechicken.core.asm.MCPDeobfuscationTransformer;
 import codechicken.core.asm.Tags;
 import codechicken.core.asm.TweakTransformer;
+import codechicken.lib.config.ConfigFile;
 import codechicken.lib.config.ConfigTag;
 import cpw.mods.fml.common.FMLCommonHandler;
 import cpw.mods.fml.common.versioning.DefaultArtifactVersion;
 import cpw.mods.fml.common.versioning.VersionParser;
 import cpw.mods.fml.relauncher.CoreModManager;
 import cpw.mods.fml.relauncher.FMLInjectionData;
-import cpw.mods.fml.relauncher.IFMLCallHook;
 import cpw.mods.fml.relauncher.IFMLLoadingPlugin;
-import cpw.mods.fml.relauncher.IFMLLoadingPlugin.MCVersion;
-import cpw.mods.fml.relauncher.IFMLLoadingPlugin.TransformerExclusions;
 
-@TransformerExclusions(value = { "codechicken.core.asm", "codechicken.obfuscator" })
-@MCVersion("1.7.10")
-public class CodeChickenCorePlugin implements IFMLLoadingPlugin, IFMLCallHook {
+@IFMLLoadingPlugin.MCVersion("1.7.10")
+@IFMLLoadingPlugin.TransformerExclusions({ "codechicken.core.asm", "codechicken.obfuscator", "codechicken.lib.asm",
+        "codechicken.lib.config" })
+public class CodeChickenCorePlugin implements IFMLLoadingPlugin {
 
     public static final String mcVersion = "[1.7.10]";
 
     @Deprecated
     public static final String version = Tags.VERSION;
 
+    public static ConfigFile config;
     public static File minecraftDir;
     public static String currentMcVersion;
     public static Logger logger = LogManager.getLogger("CodeChickenCore");
 
     public CodeChickenCorePlugin() {
-        if (minecraftDir != null) return; // get called twice, once for IFMLCallHook
-
+        if (minecraftDir != null) return;
         minecraftDir = (File) FMLInjectionData.data()[6];
         currentMcVersion = (String) FMLInjectionData.data()[4];
+        config = new ConfigFile(new File(minecraftDir, "config/CodeChickenCore.cfg"))
+                .setComment("CodeChickenCore configuration file.");
+        if (Boolean.getBoolean("ccc.dev.deobfuscate")) {
+            injectDeobfPlugin();
+        }
+    }
 
-        injectDeobfPlugin();
+    @Override
+    public String[] getASMTransformerClass() {
+        versionCheck(mcVersion, "CodeChickenCore");
+        return new String[] { "codechicken.lib.asm.ClassHeirachyManager", "codechicken.lib.asm.RedirectorTransformer" };
+    }
+
+    @Override
+    public String getAccessTransformerClass() {
+        if (Boolean.getBoolean("ccc.dev.runtimePublic")) {
+            return "codechicken.core.asm.CodeChickenAccessTransformer";
+        } else {
+            return null;
+        }
+    }
+
+    @Override
+    public String getModContainerClass() {
+        return "codechicken.core.asm.CodeChickenCoreModContainer";
+    }
+
+    @Override
+    public String getSetupClass() {
+        return null;
+    }
+
+    @Override
+    public void injectData(Map<String, Object> data) {
+        ConfigTag checkRAM = CodeChickenCorePlugin.config.getTag("checks")
+                .setComment("Configuration options for checking various requirements for a modpack.").useBraces();
+        if (checkRAM.getTag("checkRAM")
+                .setComment("If set to true, check RAM available for Minecraft before continuing to load")
+                .getBooleanValue(false)) {
+            systemCheck(checkRAM);
+        }
+        TweakTransformer.load();
+        DelegatedTransformer.load();
     }
 
     private void injectDeobfPlugin() {
         try {
             Class<?> wrapperClass = Class.forName("cpw.mods.fml.relauncher.CoreModManager$FMLPluginWrapper");
-            Constructor wrapperConstructor = wrapperClass
+            Constructor<?> wrapperConstructor = wrapperClass
                     .getConstructor(String.class, IFMLLoadingPlugin.class, File.class, Integer.TYPE, String[].class);
             Field f_loadPlugins = CoreModManager.class.getDeclaredField("loadPlugins");
             wrapperConstructor.setAccessible(true);
@@ -76,7 +112,7 @@ public class CodeChickenCorePlugin implements IFMLLoadingPlugin, IFMLCallHook {
                             0,
                             new String[0]));
         } catch (Exception e) {
-            logger.error("Failed to inject MCPDeobfuscation Transformer", e);
+            logger.error("Failed to inject FMLPluginWrapper for MCPDeobfuscation Transformer", e);
         }
     }
 
@@ -186,74 +222,4 @@ public class CodeChickenCorePlugin implements IFMLLoadingPlugin, IFMLCallHook {
             FMLCommonHandler.instance().exitJava(-98, true);
         }
     }
-
-    @Override
-    public String[] getASMTransformerClass() {
-        versionCheck(mcVersion, "CodeChickenCore");
-        return new String[] { "codechicken.lib.asm.ClassHeirachyManager", "codechicken.core.asm.TweakTransformer",
-                "codechicken.core.asm.DelegatedTransformer", "codechicken.core.asm.DefaultImplementationTransformer",
-                "codechicken.lib.asm.RedirectorTransformer" };
-    }
-
-    @Override
-    public String getAccessTransformerClass() {
-        return "codechicken.core.asm.CodeChickenAccessTransformer";
-    }
-
-    @Override
-    public String getModContainerClass() {
-        return "codechicken.core.asm.CodeChickenCoreModContainer";
-    }
-
-    @Override
-    public String getSetupClass() {
-        return getClass().getName();
-    }
-
-    @Override
-    public void injectData(Map<String, Object> data) {}
-
-    @Override
-    public Void call() {
-        CodeChickenCoreModContainer.loadConfig();
-        ConfigTag checkRAM;
-        checkRAM = CodeChickenCoreModContainer.config.getTag("checks")
-                .setComment("Configuration options for checking various requirements for a modpack.").useBraces();
-        if (checkRAM.getTag("checkRAM")
-                .setComment("If set to true, check RAM available for Minecraft before continuing to load")
-                .getBooleanValue(false))
-            systemCheck(checkRAM);
-        TweakTransformer.load();
-        scanCodeChickenMods();
-
-        return null;
-    }
-
-    private void scanCodeChickenMods() {
-        File modsDir = new File(minecraftDir, "mods");
-        for (File file : modsDir.listFiles()) scanMod(file);
-        File versionModsDir = new File(minecraftDir, "mods/" + currentMcVersion);
-        if (versionModsDir.exists()) for (File file : versionModsDir.listFiles()) scanMod(file);
-    }
-
-    private void scanMod(File file) {
-        if (!file.getName().endsWith(".jar") && !file.getName().endsWith(".zip")) return;
-
-        try {
-            JarFile jar = new JarFile(file);
-            try {
-                Manifest manifest = jar.getManifest();
-                if (manifest == null) return;
-                Attributes attr = manifest.getMainAttributes();
-                if (attr == null) return;
-
-                String transformer = attr.getValue("CCTransformer");
-                if (transformer != null) DelegatedTransformer.addTransformer(transformer, jar, file);
-            } finally {
-                jar.close();
-            }
-        } catch (Exception e) {
-            logger.error("CodeChickenCore: Failed to read jar file: " + file.getName(), e);
-        }
-    }
 }

src/main/java/codechicken/core/launch/DepLoader.java

@@ -1,186 +0,0 @@
-package codechicken.core.launch;
-
-import java.util.Map;
-import java.util.regex.Matcher;
-import java.util.regex.Pattern;
-
-import javax.swing.Box;
-import javax.swing.JDialog;
-import javax.swing.JOptionPane;
-
-import cpw.mods.fml.common.versioning.ComparableVersion;
-import cpw.mods.fml.relauncher.IFMLCallHook;
-import cpw.mods.fml.relauncher.IFMLLoadingPlugin;
-import cpw.mods.fml.relauncher.IFMLLoadingPlugin.MCVersion;
-
-/**
- * For autodownloading stuff. This is really unoriginal, mostly ripped off FML, credits to cpw.
- */
-@MCVersion("1.7.10")
-public class DepLoader implements IFMLLoadingPlugin, IFMLCallHook {
-
-    public interface IDownloadDisplay {
-
-        void resetProgress(int sizeGuess);
-
-        void setPokeThread(Thread currentThread);
-
-        void updateProgress(int fullLength);
-
-        boolean shouldStopIt();
-
-        void updateProgressString(String string, Object... data);
-
-        Object makeDialog();
-
-        void showErrorDialog(String name, String url);
-    }
-
-    @SuppressWarnings("serial")
-    public static class Downloader extends JOptionPane implements IDownloadDisplay {
-
-        boolean stopIt;
-        Thread pokeThread;
-
-        private Box makeProgressPanel() {
-            return null;
-        }
-
-        @Override
-        public JDialog makeDialog() {
-            return null;
-        }
-
-        protected void requestClose(String message) {}
-
-        @Override
-        public void updateProgressString(String progressUpdate, Object... data) {}
-
-        @Override
-        public void resetProgress(int sizeGuess) {}
-
-        @Override
-        public void updateProgress(int fullLength) {}
-
-        @Override
-        public void setPokeThread(Thread currentThread) {}
-
-        @Override
-        public boolean shouldStopIt() {
-            return true;
-        }
-
-        @Override
-        public void showErrorDialog(String name, String url) {}
-    }
-
-    public static class DummyDownloader implements IDownloadDisplay {
-
-        @Override
-        public void resetProgress(int sizeGuess) {}
-
-        @Override
-        public void setPokeThread(Thread currentThread) {}
-
-        @Override
-        public void updateProgress(int fullLength) {}
-
-        @Override
-        public boolean shouldStopIt() {
-            return false;
-        }
-
-        @Override
-        public void updateProgressString(String string, Object... data) {}
-
-        @Override
-        public Object makeDialog() {
-            return null;
-        }
-
-        @Override
-        public void showErrorDialog(String name, String url) {}
-    }
-
-    public static class VersionedFile {
-
-        public final Pattern pattern;
-        public final String filename;
-        public final ComparableVersion version;
-        public final String name;
-
-        public VersionedFile(String filename, Pattern pattern) {
-            this.pattern = pattern;
-            this.filename = filename;
-            Matcher m = pattern.matcher(filename);
-            if (m.matches()) {
-                name = m.group(1);
-                version = new ComparableVersion(m.group(2));
-            } else {
-                name = null;
-                version = null;
-            }
-        }
-
-        public boolean matches() {
-            return name != null;
-        }
-    }
-
-    public static class Dependency {
-
-        public String url;
-        public VersionedFile file;
-
-        public String existing;
-        /**
-         * Flag set to add this dep to the classpath immediately because it is required for a coremod.
-         */
-        public boolean coreLib;
-
-        public Dependency(String url, VersionedFile file, boolean coreLib) {
-            this.url = url;
-            this.file = file;
-            this.coreLib = coreLib;
-        }
-    }
-
-    public static class DepLoadInst {
-
-        public DepLoadInst() {}
-
-        public void load() {}
-    }
-
-    public static void load() {}
-
-    @Override
-    public String[] getASMTransformerClass() {
-        return null;
-    }
-
-    @Override
-    public String getModContainerClass() {
-        return null;
-    }
-
-    @Override
-    public String getSetupClass() {
-        return getClass().getName();
-    }
-
-    @Override
-    public void injectData(Map<String, Object> data) {}
-
-    @Override
-    public Void call() {
-        load();
-
-        return null;
-    }
-
-    @Override
-    public String getAccessTransformerClass() {
-        return null;
-    }
-}

src/main/java/codechicken/lib/asm/ClassHeirachyManager.java

@@ -1,13 +1,12 @@
 package codechicken.lib.asm;
 
-import java.util.ArrayList;
-import java.util.HashMap;
-import java.util.HashSet;
+import java.util.Map;
+import java.util.concurrent.ConcurrentHashMap;
 
 import net.minecraft.launchwrapper.IClassTransformer;
 import net.minecraft.launchwrapper.Launch;
-import net.minecraft.launchwrapper.LaunchClassLoader;
 
+import org.objectweb.asm.ClassReader;
 import org.objectweb.asm.tree.ClassNode;
 
 import cpw.mods.fml.common.asm.transformers.deobf.FMLDeobfuscatingRemapper;
@@ -18,47 +17,60 @@ import cpw.mods.fml.common.asm.transformers.deobf.FMLDeobfuscatingRemapper;
  */
 public class ClassHeirachyManager implements IClassTransformer {
 
+    private static final Map<String, ClassInfo> superclasses = new ConcurrentHashMap<>(1000);
+
     static {
-        ASMInit.init();
+        superclasses.put("java.lang.Object", ClassInfo.OBJECT);
     }
 
-    public static class SuperCache {
-
-        String superclass;
-        public HashSet<String> parents = new HashSet<String>();
-        private boolean flattened;
-
-        public void add(String parent) {
-            parents.add(parent);
+    @Override
+    public byte[] transform(String name, String transformedName, byte[] bytes) {
+        if (bytes == null) return null;
+        if (!superclasses.containsKey(transformedName)) {
+            declareASM(transformedName, bytes);
         }
+        return bytes;
+    }
 
-        public void flatten() {
-            if (flattened) return;
+    private static ClassInfo declareASM(String name, byte[] bytes) {
+        final ClassNode node = ASMHelper.createClassNode(bytes, ClassReader.SKIP_CODE);
+        final ClassInfo classInfo = new ClassInfo(node);
+        superclasses.put(name, classInfo);
+        return classInfo;
+    }
 
-            for (String s : new ArrayList<String>(parents)) {
-                SuperCache c = declareClass(s);
-                if (c != null) {
-                    c.flatten();
-                    parents.addAll(c.parents);
-                }
+    private static ClassInfo declareReflection(String name) throws ClassNotFoundException {
+        final Class<?> aclass = Class.forName(name);
+        final ClassInfo classInfo = new ClassInfo(aclass);
+        superclasses.put(name, classInfo);
+        return classInfo;
+    }
+
+    private static ClassInfo declareClass(String name) {
+        try {
+            byte[] bytes = Launch.classLoader.getClassBytes(unKey(name));
+            if (bytes != null) {
+                return declareASM(name, bytes);
             }
-            flattened = true;
+        } catch (Exception ignored) {}
+        try {
+            return declareReflection(name);
+        } catch (ClassNotFoundException ignored) {}
+        return null;
+    }
+
+    private static String toKey(String name) {
+        if (ObfMapping.obfuscated) {
+            return FMLDeobfuscatingRemapper.INSTANCE.map(name.replace('.', '/')).replace('/', '.');
         }
+        return name.replace('/', '.');
     }
 
-    public static HashMap<String, SuperCache> superclasses = new HashMap<String, SuperCache>();
-    private static LaunchClassLoader cl = Launch.classLoader;
-
-    public static String toKey(String name) {
-        if (ObfMapping.obfuscated)
-            name = FMLDeobfuscatingRemapper.INSTANCE.map(name.replace('.', '/')).replace('/', '.');
-        return name;
-    }
-
-    public static String unKey(String name) {
-        if (ObfMapping.obfuscated)
-            name = FMLDeobfuscatingRemapper.INSTANCE.unmap(name.replace('.', '/')).replace('/', '.');
-        return name;
+    private static String unKey(String name) {
+        if (ObfMapping.obfuscated) {
+            return FMLDeobfuscatingRemapper.INSTANCE.unmap(name.replace('.', '/')).replace('/', '.');
+        }
+        return name.replace('/', '.');
     }
 
     /**
@@ -72,83 +84,90 @@ public class ClassHeirachyManager implements IClassTransformer {
 
         if (name.equals(superclass)) return true;
 
-        SuperCache cache = declareClass(name);
-        if (cache == null) // just can't handle this
-            return false;
+        ClassInfo classInfo = superclasses.get(name);
+        if (classInfo == null) classInfo = declareClass(name);
+        if (classInfo == null) return false;
 
-        cache.flatten();
-        return cache.parents.contains(superclass);
-    }
-
-    private static SuperCache declareClass(String name) {
-        name = toKey(name);
-        SuperCache cache = superclasses.get(name);
-
-        if (cache != null) return cache;
-
-        try {
-            byte[] bytes = cl.getClassBytes(unKey(name));
-            if (bytes != null) cache = declareASM(bytes);
-        } catch (Exception e) {}
-
-        if (cache != null) return cache;
-
-        try {
-            cache = declareReflection(name);
-        } catch (ClassNotFoundException e) {}
-
-        return cache;
-    }
-
-    private static SuperCache declareReflection(String name) throws ClassNotFoundException {
-        Class<?> aclass = Class.forName(name);
-
-        SuperCache cache = getOrCreateCache(name);
-        if (aclass.isInterface()) cache.superclass = "java.lang.Object";
-        else if (name.equals("java.lang.Object")) return cache;
-        else cache.superclass = toKey(aclass.getSuperclass().getName());
-
-        cache.add(cache.superclass);
-        for (Class<?> iclass : aclass.getInterfaces()) cache.add(toKey(iclass.getName()));
-
-        return cache;
-    }
-
-    private static SuperCache declareASM(byte[] bytes) {
-        ClassNode node = ASMHelper.createClassNode(bytes);
-        String name = toKey(node.name);
-
-        SuperCache cache = getOrCreateCache(name);
-        cache.superclass = toKey(node.superName.replace('/', '.'));
-        cache.add(cache.superclass);
-        for (String iclass : node.interfaces) cache.add(toKey(iclass.replace('/', '.')));
-
-        return cache;
-    }
-
-    @Override
-    public byte[] transform(String name, String tname, byte[] bytes) {
-        if (bytes == null) return null;
-
-        if (!superclasses.containsKey(tname)) declareASM(bytes);
-
-        return bytes;
-    }
-
-    public static SuperCache getOrCreateCache(String name) {
-        SuperCache cache = superclasses.get(name);
-        if (cache == null) superclasses.put(name, cache = new SuperCache());
-        return cache;
+        return classInfo.hasSuper(superclass);
     }
 
     public static String getSuperClass(String name, boolean runtime) {
         name = toKey(name);
-        SuperCache cache = declareClass(name);
-        if (cache == null) return "java.lang.Object";
 
-        cache.flatten();
-        String s = cache.superclass;
-        if (!runtime) s = FMLDeobfuscatingRemapper.INSTANCE.unmap(s);
+        ClassInfo classInfo = superclasses.get(name);
+        if (classInfo == null) classInfo = declareClass(name);
+        if (classInfo == null || classInfo.superclass == null) return "java.lang.Object";
+
+        final String s = classInfo.superclass;
+        if (!runtime) {
+            return FMLDeobfuscatingRemapper.INSTANCE.unmap(s);
+        }
         return s;
     }
+
+    private static class ClassInfo {
+
+        public static final ClassInfo OBJECT = new ClassInfo();
+
+        public final String superclass;
+        public final String[] interfaces;
+        public ClassInfo parent;
+
+        private ClassInfo() {
+            this.superclass = null;
+            this.interfaces = null;
+        }
+
+        public ClassInfo(ClassNode node) {
+            if ("java/lang/Object".equals(node.superName)) {
+                superclass = "java.lang.Object";
+                parent = OBJECT;
+            } else {
+                superclass = toKey(node.superName);
+            }
+            if (node.interfaces.isEmpty()) {
+                interfaces = null;
+            } else {
+                interfaces = new String[node.interfaces.size()];
+                for (int i = 0; i < node.interfaces.size(); i++) {
+                    interfaces[i] = toKey(node.interfaces.get(i));
+                }
+            }
+        }
+
+        public ClassInfo(Class<?> aclass) {
+            if (aclass.isInterface()) {
+                this.superclass = "java.lang.Object";
+                this.parent = OBJECT;
+            } else {
+                final Class<?> superclass = aclass.getSuperclass();
+                if (superclass == null || "java.lang.Object".equals(superclass.getName())) {
+                    this.superclass = "java.lang.Object";
+                    this.parent = OBJECT;
+                } else {
+                    this.superclass = toKey(superclass.getName());
+                }
+            }
+            final Class<?>[] interfaces = aclass.getInterfaces();
+            if (interfaces.length == 0) {
+                this.interfaces = null;
+            } else {
+                this.interfaces = new String[interfaces.length];
+                for (int i = 0; i < interfaces.length; i++) {
+                    this.interfaces[i] = toKey(interfaces[i].getName());
+                }
+            }
+        }
+
+        public boolean hasSuper(String superclass) {
+            if (this.superclass == null) return false;
+            if (this.superclass.equals(superclass)) return true;
+            ClassInfo parentInfo = this.parent;
+            if (parentInfo == null) parentInfo = superclasses.get(this.superclass);
+            if (parentInfo == null) parentInfo = declareClass(this.superclass);
+            if (parentInfo == null) return false;
+            this.parent = parentInfo;
+            return parentInfo.hasSuper(superclass);
+        }
+    }
 }

src/main/java/codechicken/lib/asm/ModularASMTransformer.java

@@ -275,17 +275,22 @@ public class ModularASMTransformer {
         }
     }
 
-    public HashMap<String, ClassNodeTransformerList> transformers = new HashMap<String, ClassNodeTransformerList>();
+    public HashMap<String, ClassNodeTransformerList> transformers = new HashMap<>();
 
     public void add(ClassNodeTransformer t) {
         ClassNodeTransformerList list = transformers.get(t.className());
-        if (list == null) transformers.put(t.className(), list = new ClassNodeTransformerList());
+        if (list == null) {
+            transformers.put(t.className(), list = new ClassNodeTransformerList());
+        }
         list.add(t);
     }
 
+    public boolean isEmpty() {
+        return transformers.isEmpty();
+    }
+
     public byte[] transform(String name, byte[] bytes) {
         if (bytes == null) return null;
-
         ClassNodeTransformerList list = transformers.get(name);
         return list == null ? bytes : list.transform(bytes);
     }

src/main/java/codechicken/obfuscator/ObfuscationRun.java

@@ -4,13 +4,15 @@ import java.io.BufferedReader;
 import java.io.File;
 import java.io.FileReader;
 import java.io.PrintStream;
+import java.lang.reflect.Constructor;
+import java.lang.reflect.InvocationTargetException;
 import java.text.DecimalFormat;
 import java.util.LinkedList;
 import java.util.List;
 import java.util.Map;
 
 import org.objectweb.asm.ClassVisitor;
-import org.objectweb.asm.commons.RemappingClassAdapter;
+import org.objectweb.asm.commons.Remapper;
 import org.objectweb.asm.tree.ClassNode;
 
 import com.google.common.base.Function;
@@ -181,7 +183,40 @@ public class ObfuscationRun implements ILogStreams {
 
     public void remap(ClassNode cnode, ClassVisitor cv) {
         cstMappper.transform(cnode);
-        cnode.accept(new RemappingClassAdapter(cv, obfMapper));
+        cnode.accept(newRemapper(cv, obfMapper));
+    }
+
+    private static ClassVisitor newRemapper(ClassVisitor visitor, Remapper remapper) {
+        try {
+            return theConstructor.newInstance(visitor, remapper);
+        } catch (InstantiationException | IllegalAccessException | InvocationTargetException e) {
+            throw new RuntimeException(e);
+        }
+    }
+
+    private static final Constructor<? extends ClassVisitor> theConstructor;
+
+    static {
+        Class<? extends ClassVisitor> remapperClass;
+        try {
+            // noinspection unchecked
+            remapperClass = (Class<? extends ClassVisitor>) Class.forName("org.objectweb.asm.commons.ClassRemapper");
+        } catch (ClassNotFoundException e) {
+            try {
+                // noinspection unchecked
+                remapperClass = (Class<? extends ClassVisitor>) Class
+                        .forName("org.objectweb.asm.commons.RemappingClassAdapter");
+            } catch (ClassNotFoundException ex) {
+                RuntimeException err = new RuntimeException(ex);
+                err.addSuppressed(e);
+                throw err;
+            }
+        }
+        try {
+            theConstructor = remapperClass.getConstructor(ClassVisitor.class, Remapper.class);
+        } catch (NoSuchMethodException e) {
+            throw new RuntimeException(e);
+        }
     }
 
     public static List<String> getParents(ClassNode cnode) {