add missing pack200utils

FCLCore/build.gradle

@@ -30,6 +30,8 @@ dependencies {
     implementation 'com.github.marschall:zipfilesystem-standalone:1.0.1'
     implementation 'org.nanohttpd:nanohttpd:2.3.1'
     implementation 'com.github.steveice10:opennbt:1.4'
+    implementation 'org.tukaani:xz:1.8'
+    implementation 'commons-io:commons-io:2.11.0'
     implementation 'org.apache.commons:commons-lang3:3.12.0'
     implementation 'org.apache.commons:commons-compress:1.21'
     implementation 'com.moandjiezana.toml:toml4j:0.7.2'

FCLCore/src/main/java/com/tungsten/fclcore/constant/FCLPath.java

@@ -0,0 +1,13 @@
+package com.tungsten.fclcore.constant;
+
+import android.content.Context;
+
+public class FCLPath {
+
+    public static String NATIVE_LIB_DIR;
+
+    public static void loadPaths(Context context) {
+        NATIVE_LIB_DIR = context.getApplicationInfo().nativeLibraryDir;
+    }
+
+}

FCLCore/src/main/java/com/tungsten/fclcore/download/game/LibraryDownloadTask.java

@@ -4,6 +4,7 @@ import static com.tungsten.fclcore.util.DigestUtils.digest;
 import static com.tungsten.fclcore.util.Hex.encodeHex;
 import static com.tungsten.fclcore.util.Logging.LOG;
 
+import com.tungsten.fclcore.constant.FCLPath;
 import com.tungsten.fclcore.download.AbstractDependencyManager;
 import com.tungsten.fclcore.download.ArtifactMalformedException;
 import com.tungsten.fclcore.download.DefaultCacheRepository;
@@ -11,10 +12,13 @@ import com.tungsten.fclcore.game.Library;
 import com.tungsten.fclcore.task.DownloadException;
 import com.tungsten.fclcore.task.FileDownloadTask;
 import com.tungsten.fclcore.task.Task;
+import com.tungsten.fclcore.util.Pack200Utils;
 import com.tungsten.fclcore.util.io.FileUtils;
 import com.tungsten.fclcore.util.io.IOUtils;
 import com.tungsten.fclcore.util.io.NetworkUtils;
 
+import org.tukaani.xz.XZInputStream;
+
 import java.io.*;
 import java.net.URL;
 import java.nio.charset.StandardCharsets;
@@ -27,7 +31,6 @@ import java.util.jar.JarInputStream;
 import java.util.jar.JarOutputStream;
 import java.util.logging.Level;
 
-// Todo : fix
 public class LibraryDownloadTask extends Task<Void> {
     private FileDownloadTask task;
     protected final File jar;
@@ -108,7 +111,7 @@ public class LibraryDownloadTask extends Task<Void> {
             }
         }
 
-        if (Pack200Utils.isSupported() && testURLExistence(url)) {
+        if (testURLExistence(url)) {
             List<URL> urls = dependencyManager.getDownloadProvider().injectURLWithCandidates(url + ".pack.xz");
             task = new FileDownloadTask(urls, xzFile, null);
             task.setCacheRepository(cacheRepository);
@@ -243,7 +246,7 @@ public class LibraryDownloadTask extends Task<Void> {
         }
 
         try (FileOutputStream jarBytes = new FileOutputStream(dest); JarOutputStream jos = new JarOutputStream(jarBytes)) {
-            Pack200Utils.unpack(temp.toFile(), jos);
+            Pack200Utils.unpack(FCLPath.NATIVE_LIB_DIR, temp.toAbsolutePath().toString(), dest.getAbsolutePath());
 
             JarEntry checksumsFile = new JarEntry("checksums.sha1");
             checksumsFile.setTime(0L);

FCLCore/src/main/java/com/tungsten/fclcore/util/Pack200Utils.java

@@ -0,0 +1,50 @@
+package com.tungsten.fclcore.util;
+
+import static org.apache.commons.io.FileUtils.listFiles;
+
+import java.io.File;
+import java.io.IOException;
+import java.util.Collection;
+import java.util.logging.Level;
+
+public class Pack200Utils {
+
+    /**
+     * Unpacks all .pack files into .jar
+     * @param nativeLibraryDir The native lib path, required to execute the unpack200 binary
+     * @param dir The path of the directory which contains .pack file
+     */
+    private static void unpack(String nativeLibraryDir, String dir) {
+        File basePath = new File(dir);
+        Collection<File> files = listFiles(basePath, new String[] { "pack" }, true);
+
+        File workdir = new File(nativeLibraryDir);
+
+        ProcessBuilder processBuilder = new ProcessBuilder().directory(workdir);
+        for(File jarFile : files) {
+            try {
+                Process process = processBuilder.command("./libunpack200.so", "-r", jarFile.getAbsolutePath(), jarFile.getAbsolutePath().replace(".pack", "")).start();
+                process.waitFor();
+            } catch (InterruptedException | IOException e) {
+                Logging.LOG.log(Level.WARNING, "Failed to unpack files in " + dir + " Error: " + e);
+            }
+        }
+    }
+
+    /**
+     * Unpacks .pack files into .jar
+     * @param in Input file path
+     * @param out Output file path
+     */
+    public static void unpack(String nativeLibraryDir, String in, String out) {
+        try {
+            File workdir = new File(nativeLibraryDir);
+            ProcessBuilder processBuilder = new ProcessBuilder().directory(workdir);
+            Process process = processBuilder.command("./libunpack200.so", "-r", in, out).start();
+            process.waitFor();
+        } catch (InterruptedException | IOException e) {
+            Logging.LOG.log(Level.WARNING, "Failed to unpack file: " + in + " Error: " + e);
+        }
+    }
+
+}