Initial support for Forge 1.20.4 (with a few minor issues).

Removed the converter project.

gradle.properties

@@ -1,4 +1,4 @@
 
 org.gradle.daemon = false
 
-fw_version = 1.5.7
+fw_version = 1.5.8

jigsaw/src/main/java/io/github/zekerzhayard/forgewrapper/installer/util/ModuleUtil.java

@@ -9,6 +9,7 @@
 import java.lang.module.ModuleReference;
 import java.lang.module.ResolvedModule;
 import java.lang.reflect.Field;
+import java.net.URL;
 import java.nio.file.Path;
 import java.nio.file.Paths;
 import java.util.HashMap;
@@ -159,6 +160,15 @@ private static class ParserData {
         }
     }
 
+    public static void setupClassPath(Path libraryDir, List<String> paths) throws Throwable {
+        Class<?> urlClassPathClass = Class.forName("jdk.internal.loader.URLClassPath");
+        Object ucp = IMPL_LOOKUP.findGetter(Class.forName("jdk.internal.loader.BuiltinClassLoader"), "ucp", urlClassPathClass).invokeWithArguments(ClassLoader.getSystemClassLoader());
+        MethodHandle addURLMH = IMPL_LOOKUP.findVirtual(urlClassPathClass, "addURL", MethodType.methodType(void.class, URL.class));
+        for (String path : paths) {
+            addURLMH.invokeWithArguments(ucp, libraryDir.resolve(path).toUri().toURL());
+        }
+    }
+
     // ForgeWrapper need some extra settings to invoke BootstrapLauncher.
     public static Class<?> setupBootstrapLauncher(Class<?> mainClass) throws Throwable {
         if (!mainClass.getModule().isOpen(mainClass.getPackageName(), ModuleUtil.class.getModule())) {

settings.gradle

@@ -1,6 +1,5 @@
 rootProject.name = 'ForgeWrapper'
 
 include 'common'
-include 'converter'
 include 'legacy'
 include 'jigsaw'

src/main/java/io/github/zekerzhayard/forgewrapper/installer/Bootstrap.java

@@ -15,6 +15,15 @@ public static void bootstrap(List<String> jvmArgs, String minecraftJar, String l
         }
         jvmArgs = replacedJvmArgs;
 
+        // Remove NewLaunch.jar from property to prevent Forge from adding it to the module path
+        StringBuilder newCP = new StringBuilder();
+        for (String path : System.getProperty("java.class.path").split(File.pathSeparator)) {
+            if (!path.endsWith("NewLaunch.jar")) {
+                newCP.append(path).append(File.pathSeparator);
+            }
+        }
+        System.setProperty("java.class.path", newCP.substring(0, newCP.length() - 1));
+
         String modulePath = null;
         List<String> addExports = new ArrayList<>();
         List<String> addOpens = new ArrayList<>();

src/main/java/io/github/zekerzhayard/forgewrapper/installer/Main.java

@@ -62,6 +62,7 @@ public static void main(String[] args) throws Throwable {
             }
         }
 
+        ModuleUtil.setupClassPath(detector.getLibraryDir(), detector.getExtraLibraries(forgeGroup, forgeArtifact, forgeFullVersion));
         Class<?> mainClass = ModuleUtil.setupBootstrapLauncher(Class.forName(detector.getMainClass(forgeGroup, forgeArtifact, forgeFullVersion)));
         mainClass.getMethod("main", String[].class).invoke(null, new Object[] { args });
     }