替换对 JDK 内置 Pack200 的依赖，允许在 JDK14 及更高版本上构建项目 (#904)

* fix: Pack200 has been removed

* Automatically add pack200 to class path

* add license header to Pack200Utils.java

HMCLCore/src/main/java/org/jackhuang/hmcl/download/game/LibraryDownloadTask.java

@@ -25,10 +25,10 @@ import org.jackhuang.hmcl.task.DownloadException;
 import org.jackhuang.hmcl.task.FileDownloadTask;
 import org.jackhuang.hmcl.task.FileDownloadTask.IntegrityCheck;
 import org.jackhuang.hmcl.task.Task;
+import org.jackhuang.hmcl.util.Pack200Utils;
 import org.jackhuang.hmcl.util.io.FileUtils;
 import org.jackhuang.hmcl.util.io.IOUtils;
 import org.jackhuang.hmcl.util.io.NetworkUtils;
-import org.jackhuang.hmcl.util.platform.SystemUtils;
 import org.tukaani.xz.XZInputStream;
 
 import java.io.*;
@@ -38,7 +38,9 @@ import java.nio.file.Files;
 import java.nio.file.Path;
 import java.util.*;
 import java.util.concurrent.CancellationException;
-import java.util.jar.*;
+import java.util.jar.JarEntry;
+import java.util.jar.JarInputStream;
+import java.util.jar.JarOutputStream;
 import java.util.logging.Level;
 
 import static org.jackhuang.hmcl.util.DigestUtils.digest;
@@ -129,7 +131,7 @@ public class LibraryDownloadTask extends Task<Void> {
             }
         }
 
-        if (SystemUtils.JRE_CAPABILITY_PACK200 && testURLExistence(url)) {
+        if (Pack200Utils.isSupported() && testURLExistence(url)) {
             List<URL> urls = dependencyManager.getDownloadProvider().injectURLWithCandidates(url + ".pack.xz");
             task = new FileDownloadTask(urls, xzFile, null);
             task.setCacheRepository(cacheRepository);
@@ -264,7 +266,7 @@ public class LibraryDownloadTask extends Task<Void> {
         }
 
         try (FileOutputStream jarBytes = new FileOutputStream(dest); JarOutputStream jos = new JarOutputStream(jarBytes)) {
-            Pack200.newUnpacker().unpack(temp.toFile(), jos);
+            Pack200Utils.unpack(temp.toFile(), jos);
 
             JarEntry checksumsFile = new JarEntry("checksums.sha1");
             checksumsFile.setTime(0L);

HMCLCore/src/main/java/org/jackhuang/hmcl/util/Pack200Utils.java

@@ -0,0 +1,123 @@
+/*
+ * Hello Minecraft! Launcher
+ * Copyright (C) 2021  huangyuhui <huanghongxun2008@126.com> and contributors
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+package org.jackhuang.hmcl.util;
+
+import java.io.File;
+import java.io.IOException;
+import java.io.InputStream;
+import java.lang.invoke.MethodHandle;
+import java.lang.invoke.MethodHandles;
+import java.lang.invoke.MethodType;
+import java.util.jar.JarOutputStream;
+import java.util.logging.Level;
+
+import static org.jackhuang.hmcl.util.Logging.LOG;
+
+/**
+ * @author Glavo
+ */
+public final class Pack200Utils {
+    private Pack200Utils() {
+    }
+
+    private static final String[] IMPL_NAMES = {
+            "java.util.jar.Pack200",
+            "org.glavo.pack200.Pack200",
+            "io.pack200.Pack200"
+    };
+
+    private static final MethodHandle newUnpackerHandle;
+    private static final MethodHandle unpackHandle;
+    private static final MethodHandle unpackFileHandle;
+
+    static {
+        Class<?> pack200Class = null;
+        Class<?> unpackerClass = null;
+
+        for (String implName : IMPL_NAMES) {
+            try {
+                pack200Class = Class.forName(implName);
+                unpackerClass = Class.forName(implName + "$Unpacker");
+                break;
+            } catch (ClassNotFoundException ignored) {
+            }
+        }
+
+        if (pack200Class == null) {
+            LOG.warning("Pack200 not found");
+            newUnpackerHandle = null;
+            unpackHandle = null;
+            unpackFileHandle = null;
+        } else {
+            final MethodHandles.Lookup lookup = MethodHandles.publicLookup();
+            MethodHandle newUnpacker = null;
+            MethodHandle unpack = null;
+            MethodHandle unpackFile = null;
+            try {
+                newUnpacker = lookup.findStatic(pack200Class, "newUnpacker", MethodType.methodType(unpackerClass));
+                unpack = lookup.findVirtual(unpackerClass, "unpack", MethodType.methodType(void.class, InputStream.class, JarOutputStream.class));
+                unpackFile = lookup.findVirtual(unpackerClass, "unpack", MethodType.methodType(void.class, File.class, JarOutputStream.class));
+            } catch (Throwable e) {
+                LOG.log(Level.WARNING, "Failed to find pack200 methods", e);
+            }
+
+            if (newUnpacker != null) {
+                newUnpackerHandle = newUnpacker;
+                unpackHandle = unpack;
+                unpackFileHandle = unpackFile;
+            } else {
+                newUnpackerHandle = null;
+                unpackHandle = null;
+                unpackFileHandle = null;
+            }
+        }
+
+    }
+
+    public static boolean isSupported() {
+        return newUnpackerHandle != null;
+    }
+
+    public static void unpack(InputStream in, JarOutputStream out) throws IOException {
+        if (newUnpackerHandle == null) {
+            throw new UnsupportedOperationException("Pack200");
+        }
+
+        try {
+            unpackHandle.invoke(newUnpackerHandle.invoke(), in, out);
+        } catch (IOException | RuntimeException | Error e) {
+            throw e;
+        } catch (Throwable e) {
+            throw new RuntimeException(e);
+        }
+    }
+
+    public static void unpack(File in, JarOutputStream out) throws IOException {
+        if (newUnpackerHandle == null) {
+            throw new UnsupportedOperationException("Pack200");
+        }
+
+        try {
+            unpackFileHandle.invoke(newUnpackerHandle.invoke(), in, out);
+        } catch (IOException | RuntimeException | Error e) {
+            throw e;
+        } catch (Throwable e) {
+            throw new RuntimeException(e);
+        }
+    }
+}

HMCLCore/src/main/java/org/jackhuang/hmcl/util/platform/SystemUtils.java

@@ -17,8 +17,6 @@
  */
 package org.jackhuang.hmcl.util.platform;
 
-import org.jackhuang.hmcl.util.Lang;
-
 import java.io.BufferedReader;
 import java.io.IOException;
 import java.io.InputStreamReader;
@@ -28,8 +26,6 @@ import java.util.List;
 public final class SystemUtils {
     private SystemUtils() {}
 
-    public static final boolean JRE_CAPABILITY_PACK200 = Lang.test(() -> Class.forName("java.util.jar.Pack200"));
-
     public static int callExternalProcess(String... command) throws IOException, InterruptedException {
         return callExternalProcess(Arrays.asList(command));
     }