Fix compatibility with Java 9+.

Remove unnecessary functions.

7 files changed, 29 insertions, 319 deletions

diff --git a/README.md b/README.md
index 2a8a9b5318..f490261c16 100644
--- a/README.md
+++ b/README.md
@@ -2,9 +2,10 @@
 
 Allow [MultiMC](https://github.com/MultiMC/MultiMC5) to launch Minecraft 1.13+ with Forge.
 
-## How to use
+**ForgeWrapper has been adopted by MultiMC, you do not need to perform the following steps manually. (2020-03-29)**
+
+## How to use (Outdated)
 
-### Install Forge Only
 1. Download Forge installer for Minecraft 1.13+ [here](https://files.minecraftforge.net/).
 2. Download ForgeWrapper jar file at the [release](https://github.com/ZekerZhayard/ForgeWrapper/releases) page.
 3. Run the below command in terminal:
@@ -14,17 +15,4 @@ Allow [MultiMC](https://github.com/MultiMC/MultiMC5) to launch Minecraft 1.13+ w
    *Notice: If you don't specify a MultiMC instance path, ForgeWrapper will create the instance folder in current working space.*
 
 4. If the instance folder which just created is not in `MultiMC/instances` folder, you just need to move to the `MultiMC/instances` folder.
-5. Run MultiMC, and you will see a new instance named `forge-<mcVersion>-<forgeVersion>`.
-
-### Install CurseForge Modpack
-1. Download the modpack zip file.
-2. Download ForgeWrapper jar file at the [release](https://github.com/ZekerZhayard/ForgeWrapper/releases) page.
-3. Run the below command in terminal:
-   ```
-   java -jar <ForgeWrapper.jar> --cursepack=<curseforge-modpack.zip> [--instance=<instance-path>]
-   ```
-   *Notice: If you don't specify a MultiMC instance path, ForgeWrapper will create the instance folder in current working space.*
-
-4. If the instance folder which just created is not in `MultiMC/instances` folder, you just need to move to the `MultiMC/instances` folder.
-5. Run MultiMC, and you will see a new instance named `<modpackName>-<modpackVersion>`.   
-*Notice: CurseForge modpack will be installed on first launch by [cursepacklocator](https://github.com/cpw/cursepacklocator), it will take a few minutes.*
\ No newline at end of file
+5. Run MultiMC, and you will see a new instance named `forge-<mcVersion>-<forgeVersion>`.
\ No newline at end of file
diff --git a/build.gradle b/build.gradle
index d1dfebe8f7..c5016005c4 100644
--- a/build.gradle
+++ b/build.gradle
@@ -5,7 +5,7 @@ apply plugin: "idea"
 
 sourceCompatibility = targetCompatibility = 1.8
 
-version = "1.4.0"
+version = "1.4.1"
 group = "io.github.zekerzhayard"
 archivesBaseName = rootProject.name
 
diff --git a/src/main/java/cpw/mods/forge/cursepacklocator/Murmur2.java b/src/main/java/cpw/mods/forge/cursepacklocator/Murmur2.java
deleted file mode 100644
index f754e18b16..0000000000
--- a/src/main/java/cpw/mods/forge/cursepacklocator/Murmur2.java
+++ /dev/null
@@ -1,166 +0,0 @@
-/**
- *   Copyright 2014 Prasanth Jayachandran
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *     http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-package cpw.mods.forge.cursepacklocator;
-
-/**
- * Murmur2 32 and 64 bit variants.
- * 32-bit Java port of https://code.google.com/p/smhasher/source/browse/trunk/MurmurHash2.cpp#37
- * 64-bit Java port of https://code.google.com/p/smhasher/source/browse/trunk/MurmurHash2.cpp#96
- */
-public class Murmur2 {
-    // Constants for 32-bit variant
-    private static final int M_32 = 0x5bd1e995;
-    private static final int R_32 = 24;
-
-    // Constants for 64-bit variant
-    private static final long M_64 = 0xc6a4a7935bd1e995L;
-    private static final int R_64 = 47;
-    private static final int DEFAULT_SEED = 0;
-
-    /**
-     * Murmur2 32-bit variant.
-     *
-     * @param data - input byte array
-     * @return - hashcode
-     */
-    public static int hash32(byte[] data) {
-        return hash32(data, data.length, DEFAULT_SEED);
-    }
-
-    /**
-     * Murmur2 32-bit variant.
-     *
-     * @param data   - input byte array
-     * @param length - length of array
-     * @param seed   - seed. (default 0)
-     * @return - hashcode
-     */
-    public static int hash32(byte[] data, int length, int seed) {
-        int h = seed ^ length;
-        int len_4 = length >> 2;
-
-        // body
-        for (int i = 0; i < len_4; i++) {
-            int i_4 = i << 2;
-            int k = (data[i_4] & 0xff)
-                | ((data[i_4 + 1] & 0xff) << 8)
-                | ((data[i_4 + 2] & 0xff) << 16)
-                | ((data[i_4 + 3] & 0xff) << 24);
-
-            // mix functions
-            k *= M_32;
-            k ^= k >>> R_32;
-            k *= M_32;
-            h *= M_32;
-            h ^= k;
-        }
-
-        // tail
-        int len_m = len_4 << 2;
-        int left = length - len_m;
-        if (left != 0) {
-            // see https://github.com/cpw/cursepacklocator/pull/3
-            if (left >= 3) {
-                h ^= (int) data[length - (left - 2)] << 16;
-            }
-            if (left >= 2) {
-                h ^= (int) data[length - (left - 1)] << 8;
-            }
-            if (left >= 1) {
-                h ^= (int) data[length - left];
-            }
-
-            h *= M_32;
-        }
-
-        // finalization
-        h ^= h >>> 13;
-        h *= M_32;
-        h ^= h >>> 15;
-
-        return h;
-    }
-
-    /**
-     * Murmur2 64-bit variant.
-     *
-     * @param data - input byte array
-     * @return - hashcode
-     */
-    public static long hash64(final byte[] data) {
-        return hash64(data, data.length, DEFAULT_SEED);
-    }
-
-    /**
-     * Murmur2 64-bit variant.
-     *
-     * @param data   - input byte array
-     * @param length - length of array
-     * @param seed   - seed. (default 0)
-     * @return - hashcode
-     */
-    public static long hash64(final byte[] data, int length, int seed) {
-        long h = (seed & 0xffffffffl) ^ (length * M_64);
-        int length8 = length >> 3;
-
-        // body
-        for (int i = 0; i < length8; i++) {
-            final int i8 = i << 3;
-            long k = ((long) data[i8] & 0xff)
-                | (((long) data[i8 + 1] & 0xff) << 8)
-                | (((long) data[i8 + 2] & 0xff) << 16)
-                | (((long) data[i8 + 3] & 0xff) << 24)
-                | (((long) data[i8 + 4] & 0xff) << 32)
-                | (((long) data[i8 + 5] & 0xff) << 40)
-                | (((long) data[i8 + 6] & 0xff) << 48)
-                | (((long) data[i8 + 7] & 0xff) << 56);
-
-            // mix functions
-            k *= M_64;
-            k ^= k >>> R_64;
-            k *= M_64;
-            h ^= k;
-            h *= M_64;
-        }
-
-        // tail
-        int tailStart = length8 << 3;
-        switch (length - tailStart) {
-            case 7:
-                h ^= (long) (data[tailStart + 6] & 0xff) << 48;
-            case 6:
-                h ^= (long) (data[tailStart + 5] & 0xff) << 40;
-            case 5:
-                h ^= (long) (data[tailStart + 4] & 0xff) << 32;
-            case 4:
-                h ^= (long) (data[tailStart + 3] & 0xff) << 24;
-            case 3:
-                h ^= (long) (data[tailStart + 2] & 0xff) << 16;
-            case 2:
-                h ^= (long) (data[tailStart + 1] & 0xff) << 8;
-            case 1:
-                h ^= (long) (data[tailStart] & 0xff);
-                h *= M_64;
-        }
-
-        // finalization
-        h ^= h >>> R_64;
-        h *= M_64;
-        h ^= h >>> R_64;
-
-        return h;
-    }
-}
\ No newline at end of file
diff --git a/src/main/java/io/github/zekerzhayard/forgewrapper/Utils.java b/src/main/java/io/github/zekerzhayard/forgewrapper/Utils.java
deleted file mode 100644
index f309d69b6c..0000000000
--- a/src/main/java/io/github/zekerzhayard/forgewrapper/Utils.java
+++ /dev/null
@@ -1,65 +0,0 @@
-package io.github.zekerzhayard.forgewrapper;
-
-import java.io.BufferedReader;
-import java.io.File;
-import java.io.IOException;
-import java.io.InputStreamReader;
-import java.net.URL;
-import java.nio.file.Files;
-import java.nio.file.Paths;
-import java.nio.file.StandardCopyOption;
-import java.security.MessageDigest;
-import java.security.NoSuchAlgorithmException;
-import java.util.Locale;
-
-public class Utils {
-    private static final char[] DIGITS = {'0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'a', 'b', 'c', 'd', 'e', 'f'};
-
-    public static void download(String url, String location) throws Exception {
-        File localFile = new File(location);
-        localFile.getParentFile().mkdirs();
-        if (localFile.isFile()) {
-            try {
-                System.out.println("Checking Fingerprints of installer...");
-                String md5 = new BufferedReader(new InputStreamReader(new URL(url + ".md5").openConnection().getInputStream())).readLine();
-                String sha1 = new BufferedReader(new InputStreamReader(new URL(url + ".sha1").openConnection().getInputStream())).readLine();
-                if (!checkMD5(location, md5) || !checkSHA1(location, sha1)) {
-                    System.out.println("Fingerprints do not match!");
-                    localFile.delete();
-                }
-            } catch (IOException e) {
-                e.printStackTrace();
-            }
-        }
-        if (!localFile.isFile()) {
-            if (localFile.isDirectory()) {
-                throw new RuntimeException(location + " must be a file!");
-            }
-            System.out.println("Downloading forge installer... (" + url + " ---> " + location + ")");
-            Files.copy(new URL(url).openConnection().getInputStream(), Paths.get(location), StandardCopyOption.REPLACE_EXISTING);
-            download(url, location);
-        }
-    }
-
-    public static boolean checkMD5(String path, String hash) throws IOException, NoSuchAlgorithmException {
-        String md5 = new String(encodeHex(MessageDigest.getInstance("MD5").digest(Files.readAllBytes(Paths.get(path)))));
-        System.out.println("MD5: " + hash + " ---> " + md5);
-        return md5.toLowerCase(Locale.ENGLISH).equals(hash.toLowerCase(Locale.ENGLISH));
-    }
-
-    public static boolean checkSHA1(String path, String hash) throws IOException, NoSuchAlgorithmException {
-        String sha1 = new String(encodeHex(MessageDigest.getInstance("SHA-1").digest(Files.readAllBytes(Paths.get(path)))));
-        System.out.println("SHA-1: " + hash + " ---> " + sha1);
-        return sha1.toLowerCase(Locale.ENGLISH).equals(hash.toLowerCase(Locale.ENGLISH));
-    }
-
-    private static char[] encodeHex(final byte[] data) {
-        final int l = data.length;
-        final char[] out = new char[l << 1];
-        for (int i = 0, j = 0; i < l; i++) {
-            out[j++] = DIGITS[(0xF0 & data[i]) >>> 4];
-            out[j++] = DIGITS[0x0F & data[i]];
-        }
-        return out;
-    }
-}
diff --git a/src/main/java/io/github/zekerzhayard/forgewrapper/converter/Converter.java b/src/main/java/io/github/zekerzhayard/forgewrapper/converter/Converter.java
index 983310a67d..403488bd95 100644
--- a/src/main/java/io/github/zekerzhayard/forgewrapper/converter/Converter.java
+++ b/src/main/java/io/github/zekerzhayard/forgewrapper/converter/Converter.java
@@ -9,7 +9,6 @@ import java.nio.file.Path;
 import java.nio.file.Paths;
 import java.nio.file.StandardCopyOption;
 import java.util.ArrayList;
-import java.util.Enumeration;
 import java.util.HashMap;
 import java.util.List;
 import java.util.Map;
@@ -22,33 +21,27 @@ import com.google.gson.JsonElement;
 import com.google.gson.JsonNull;
 import com.google.gson.JsonObject;
 import com.google.gson.JsonParser;
-import io.github.zekerzhayard.forgewrapper.Utils;
 
 public class Converter {
-    public static void convert(Path installerPath, Path targetDir, Path multimcDir, String cursepack) throws Exception {
-        if (cursepack != null) {
-            installerPath = getForgeInstallerFromCursePack(cursepack);
-        }
-
+    public static void convert(Path installerPath, Path targetDir, Path multimcDir) throws Exception {
         JsonObject installer = getJsonFromZip(installerPath, "version.json");
         JsonObject installProfile = getJsonFromZip(installerPath, "install_profile.json");
         List<String> arguments = getAdditionalArgs(installer);
         String mcVersion = arguments.get(arguments.indexOf("--fml.mcVersion") + 1);
         String forgeVersion = arguments.get(arguments.indexOf("--fml.forgeVersion") + 1);
         String forgeFullVersion = "forge-" + mcVersion + "-" + forgeVersion;
-        String instanceName = cursepack == null ? forgeFullVersion : installerPath.toFile().getName().replace("-installer.jar", "");
         StringBuilder wrapperVersion = new StringBuilder();
 
         JsonObject pack = convertPackJson(mcVersion);
-        JsonObject patches = convertPatchesJson(installer, installProfile, mcVersion, forgeVersion, wrapperVersion, cursepack);
+        JsonObject patches = convertPatchesJson(installer, installProfile, mcVersion, forgeVersion, wrapperVersion);
 
         Files.createDirectories(targetDir);
 
         // Copy mmc-pack.json and instance.cfg to <instance> folder.
-        Path instancePath = targetDir.resolve(instanceName);
+        Path instancePath = targetDir.resolve(forgeFullVersion);
         Files.createDirectories(instancePath);
         Files.copy(new ByteArrayInputStream(pack.toString().getBytes(StandardCharsets.UTF_8)), instancePath.resolve("mmc-pack.json"), StandardCopyOption.REPLACE_EXISTING);
-        Files.copy(new ByteArrayInputStream(("InstanceType=OneSix\nname=" + instanceName).getBytes(StandardCharsets.UTF_8)), instancePath.resolve("instance.cfg"), StandardCopyOption.REPLACE_EXISTING);
+        Files.copy(new ByteArrayInputStream(("InstanceType=OneSix\nname=" + forgeFullVersion).getBytes(StandardCharsets.UTF_8)), instancePath.resolve("instance.cfg"), StandardCopyOption.REPLACE_EXISTING);
 
         // Copy ForgeWrapper to <instance>/libraries folder.
         Path librariesPath = instancePath.resolve("libraries");
@@ -60,22 +53,9 @@ public class Converter {
         Files.createDirectories(patchesPath);
         Files.copy(new ByteArrayInputStream(patches.toString().getBytes(StandardCharsets.UTF_8)), patchesPath.resolve("net.minecraftforge.json"), StandardCopyOption.REPLACE_EXISTING);
 
-        // Extract all curse pack entries to <instance>/.minecraft folder.
-        Path minecraftPath = instancePath.resolve(".minecraft");
-        if (cursepack != null) {
-            ZipFile zip = new ZipFile(cursepack);
-            Enumeration<? extends ZipEntry> entries = zip.entries();
-            while (entries.hasMoreElements()) {
-                ZipEntry entry = entries.nextElement();
-                Path targetFolder = minecraftPath.resolve(entry.getName());
-                Files.createDirectories(targetFolder.getParent());
-                Files.copy(zip.getInputStream(entry), targetFolder, StandardCopyOption.REPLACE_EXISTING);
-            }
-        }
-
         // Copy forge installer to MultiMC/libraries/net/minecraftforge/forge/<mcVersion>-<forgeVersion> folder.
         if (multimcDir != null) {
-            Path targetInstallerPath = multimcDir.resolve("net").resolve("minecraftforge").resolve("forge").resolve(forgeVersion);
+            Path targetInstallerPath = multimcDir.resolve("libraries").resolve("net").resolve("minecraftforge").resolve("forge").resolve(forgeVersion);
             Files.createDirectories(targetInstallerPath);
             Files.copy(installerPath, targetInstallerPath.resolve(forgeFullVersion + "-installer.jar"), StandardCopyOption.REPLACE_EXISTING);
         }
@@ -101,28 +81,6 @@ public class Converter {
         }
     }
 
-    private static Path getForgeInstallerFromCursePack(String cursepack) throws Exception {
-        JsonObject manifest = getJsonFromZip(Paths.get(cursepack), "manifest.json");
-        JsonObject minecraft = getElement(manifest, "minecraft").getAsJsonObject();
-        String mcVersion = getElement(minecraft, "version").getAsString();
-        String forgeVersion = null;
-        for (JsonElement element : getElement(minecraft, "modLoaders").getAsJsonArray()) {
-            String id = getElement(element.getAsJsonObject(), "id").getAsString();
-            if (id.startsWith("forge-")) {
-                forgeVersion = id.replace("forge-", "");
-                break;
-            }
-        }
-        if (forgeVersion == null) {
-            throw new RuntimeException("The curse pack is invalid!");
-        }
-        String packName = getElement(manifest, "name").getAsString();
-        String packVersion = getElement(manifest, "version").getAsString();
-        Path installer = Paths.get(System.getProperty("java.io.tmpdir", "."), String.format("%s-%s-installer.jar", packName, packVersion));
-        Utils.download(String.format("https://files.minecraftforge.net/maven/net/minecraftforge/forge/%s-%s/forge-%s-%s-installer.jar", mcVersion, forgeVersion, mcVersion, forgeVersion), installer.toString());
-        return installer;
-    }
-
     // Convert mmc-pack.json:
     //   - Replace Minecraft version
     private static JsonObject convertPackJson(String mcVersion) {
@@ -142,7 +100,7 @@ public class Converter {
     //   - Add libraries
     //   - Add forge-launcher url
     //   - Replace Minecraft & Forge versions
-    private static JsonObject convertPatchesJson(JsonObject installer, JsonObject installProfile, String mcVersion, String forgeVersion, StringBuilder wrapperVersion, String cursepack) {
+    private static JsonObject convertPatchesJson(JsonObject installer, JsonObject installProfile, String mcVersion, String forgeVersion, StringBuilder wrapperVersion) {
         JsonObject patches = new JsonParser().parse(new InputStreamReader(Converter.class.getResourceAsStream("/patches/net.minecraftforge.json"))).getAsJsonObject();
         JsonArray mavenFiles = getElement(patches, "mavenFiles").getAsJsonArray();
         JsonArray libraries = getElement(patches, "libraries").getAsJsonArray();
@@ -160,12 +118,6 @@ public class Converter {
                 wrapperVersion.append(getElement(lib.getAsJsonObject(), "MMC-filename").getAsString());
             }
         }
-        if (cursepack != null) {
-            JsonObject cursepacklocator = new JsonObject();
-            cursepacklocator.addProperty("name", "cpw.mods.forge:cursepacklocator:1.2.0");
-            cursepacklocator.addProperty("url", "https://files.minecraftforge.net/maven/");
-            libraries.add(cursepacklocator);
-        }
         Map<String, String> additionalUrls = new HashMap<>();
         String path = String.format("net/minecraftforge/forge/%s-%s/forge-%s-%s", mcVersion, forgeVersion, mcVersion, forgeVersion);
         additionalUrls.put(path + "-universal.jar", "https://files.minecraftforge.net/maven/" + path + "-universal.jar");
diff --git a/src/main/java/io/github/zekerzhayard/forgewrapper/converter/Main.java b/src/main/java/io/github/zekerzhayard/forgewrapper/converter/Main.java
index 312f9c31ab..83ecdf959e 100644
--- a/src/main/java/io/github/zekerzhayard/forgewrapper/converter/Main.java
+++ b/src/main/java/io/github/zekerzhayard/forgewrapper/converter/Main.java
@@ -6,29 +6,18 @@ import java.nio.file.Path;
 import java.nio.file.Paths;
 import java.util.HashMap;
 
-import io.github.zekerzhayard.forgewrapper.Utils;
-
 public class Main {
     public static void main(String[] args) {
         Path installer = null, instance = Paths.get("."), multimc = null;
-        String cursepack = null;
         try {
             HashMap<String, String> argsMap = parseArgs(args);
-            if (argsMap.containsKey("--installer")) {
-                installer = Paths.get(argsMap.get("--installer"));
-            } else {
-                installer = Paths.get(System.getProperty("java.io.tmpdir", "."), "gson-2.8.6.jar");
-                Utils.download("https://repo1.maven.org/maven2/com/google/code/gson/gson/2.8.6/gson-2.8.6.jar", installer.toString());
-            }
+            installer = Paths.get(argsMap.get("--installer"));
             if (argsMap.containsKey("--instance")) {
                 instance = Paths.get(argsMap.get("--instance"));
                 multimc = instance.getParent();
             }
-            if (argsMap.containsKey("--cursepack")) {
-                cursepack = argsMap.get("--cursepack");
-            }
         } catch (Exception e) {
-            System.out.println("Invalid arguments! Use: java -jar <ForgeWrapper.jar> [--installer=<forge-installer.jar> | --cursepack=<curseforge-modpack.zip>] [--instance=<instance-path>]");
+            System.out.println("Invalid arguments! Use: java -jar <ForgeWrapper.jar> --installer=<forge-installer.jar> [--instance=<instance-path>]");
             throw new RuntimeException(e);
         }
 
@@ -37,7 +26,7 @@ public class Main {
                 Converter.class.getProtectionDomain().getCodeSource().getLocation(),
                 installer.toUri().toURL()
             }, null);
-            ucl.loadClass("io.github.zekerzhayard.forgewrapper.converter.Converter").getMethod("convert", Path.class, Path.class, Path.class, String.class).invoke(null, installer, instance, multimc, cursepack);
+            ucl.loadClass("io.github.zekerzhayard.forgewrapper.converter.Converter").getMethod("convert", Path.class, Path.class, Path.class).invoke(null, installer, instance, multimc);
             System.out.println("Successfully install Forge for MultiMC!");
         } catch (Exception e) {
             System.out.println("Failed to install Forge!");
@@ -56,7 +45,7 @@ public class Main {
             String[] params = arg.split("=", 2);
             map.put(params[0], params[1]);
         }
-        if (!map.containsKey("--installer") && !map.containsKey("--cursepack")) {
+        if (!map.containsKey("--installer")) {
             throw new IllegalArgumentException();
         }
         return map;
diff --git a/src/main/java/io/github/zekerzhayard/forgewrapper/installer/Main.java b/src/main/java/io/github/zekerzhayard/forgewrapper/installer/Main.java
index f9d534c270..bd97c192d1 100644
--- a/src/main/java/io/github/zekerzhayard/forgewrapper/installer/Main.java
+++ b/src/main/java/io/github/zekerzhayard/forgewrapper/installer/Main.java
@@ -23,12 +23,12 @@ public class Main {
         Path minecraftDir = librariesDir.resolve("net").resolve("minecraft").resolve("client");
         Path forgeDir = librariesDir.resolve("net").resolve("minecraftforge").resolve("forge").resolve(forgeFullVersion);
         if (getAdditionalLibraries(minecraftDir, forgeDir, mcVersion, forgeFullVersion, mcpFullVersion).anyMatch(path -> !Files.exists(path))) {
-            System.out.println("Some extra libraries are missing! Run installer to spawn them now.");
+            System.out.println("Some extra libraries are missing! Run the installer to generate them now.");
             URLClassLoader ucl = URLClassLoader.newInstance(new URL[] {
                 Main.class.getProtectionDomain().getCodeSource().getLocation(),
                 Launcher.class.getProtectionDomain().getCodeSource().getLocation(),
                 forgeDir.resolve("forge-" + forgeFullVersion + "-installer.jar").toUri().toURL()
-            }, null);
+            }, getParentClassLoader());
 
             Class<?> installer = ucl.loadClass("io.github.zekerzhayard.forgewrapper.installer.Installer");
             if (!(boolean) installer.getMethod("install").invoke(null)) {
@@ -56,4 +56,16 @@ public class Main {
             minecraftDir.resolve(mcpFullVersion).resolve("client-" + mcpFullVersion + "-srg.jar")
         );
     }
+
+    // https://github.com/MinecraftForge/Installer/blob/fe18a164b5ebb15b5f8f33f6a149cc224f446dc2/src/main/java/net/minecraftforge/installer/actions/PostProcessors.java#L287-L303
+    private static ClassLoader getParentClassLoader() {
+        if (!System.getProperty("java.version").startsWith("1.")) {
+            try {
+                return (ClassLoader) ClassLoader.class.getDeclaredMethod("getPlatformClassLoader").invoke(null);
+            } catch (Exception e) {
+                System.out.println("No platform classloader: " + System.getProperty("java.version"));
+            }
+        }
+        return null;
+    }
 }