Add the ability to unpack .pack files

app_pojavlauncher/src/main/java/net/kdt/pojavlaunch/PojavLoginActivity.java

@@ -453,7 +453,7 @@ private boolean installRuntimeAutomatically(AssetManager am, boolean otherRuntim
         if(rt_version == null) return false;
         if(!rt_version.equals(current_rt_version)) { //If we already have an integrated one installed, check if it's up-to-date
             try {
-                MultiRTUtils.installRuntimeNamedBinpack(am.open("components/jre/universal.tar.xz"), am.open("components/jre/bin-" + archAsString(Tools.DEVICE_ARCHITECTURE) + ".tar.xz"), "Internal", rt_version,
+                MultiRTUtils.installRuntimeNamedBinpack(getApplicationInfo().nativeLibraryDir, am.open("components/jre/universal.tar.xz"), am.open("components/jre/bin-" + archAsString(Tools.DEVICE_ARCHITECTURE) + ".tar.xz"), "Internal", rt_version,
                         (resid, vararg) -> runOnUiThread(()->{if(startupTextView!=null)startupTextView.setText(getString(resid,vararg));}));
                 MultiRTUtils.postPrepare(PojavLoginActivity.this,"Internal");
                 return true;

app_pojavlauncher/src/main/java/net/kdt/pojavlaunch/multirt/MultiRTUtils.java

@@ -1,5 +1,7 @@
 package net.kdt.pojavlaunch.multirt;
 
+import static org.apache.commons.io.FileUtils.listFiles;
+
 import android.content.Context;
 import android.system.Os;
 import android.util.Log;
@@ -21,6 +23,7 @@
 import java.io.IOException;
 import java.io.InputStream;
 import java.util.ArrayList;
+import java.util.Collection;
 import java.util.HashMap;
 import java.util.List;
 
@@ -103,7 +106,7 @@ public static void postPrepare(Context ctx, String name) throws IOException {
         copyDummyNativeLib(ctx,"libawt_xawt.so", dest, libFolder);
     }
 
-    public static Runtime installRuntimeNamedBinpack(InputStream universalFileInputStream, InputStream platformBinsInputStream, String name, String binpackVersion, RuntimeProgressReporter thingy) throws IOException {
+    public static Runtime installRuntimeNamedBinpack(String nativeLibDir, InputStream universalFileInputStream, InputStream platformBinsInputStream, String name, String binpackVersion, RuntimeProgressReporter thingy) throws IOException {
         File dest = new File(RUNTIME_FOLDER,"/"+name);
         if(dest.exists()) FileUtils.deleteDirectory(dest);
         dest.mkdirs();
@@ -113,10 +116,14 @@ public static Runtime installRuntimeNamedBinpack(InputStream universalFileInputS
         FileOutputStream fos = new FileOutputStream(binpack_verfile);
         fos.write(binpackVersion.getBytes());
         fos.close();
+
+        unpack200(nativeLibDir,RUNTIME_FOLDER + "/" + name);
+
         sCache.remove(name); // Force reread
         return read(name);
     }
 
+
     public static String __internal__readBinpackVersion(String name) {
         File binpack_verfile = new File(RUNTIME_FOLDER,"/"+name+"/pojav_version");
         try {
@@ -188,6 +195,28 @@ public static Runtime read(String name) {
         return returnRuntime;
     }
 
+    /**
+     * Unpacks all .pack files into .jar
+     * @param nativeLibraryDir The native lib path, required to execute the unpack200 binary
+     * @param runtimePath The path to the runtime to walk into
+     */
+    private static void unpack200(String nativeLibraryDir, String runtimePath) {
+        File basePath = new File(runtimePath);
+        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("./unpack200.so", "-r", jarFile.getAbsolutePath(), jarFile.getAbsolutePath().replace(".pack", "")).start();
+                process.waitFor();
+            }catch (InterruptedException | IOException e) {
+                Log.e("MULTIRT", "Failed to unpack the runtime !");
+            }
+        }
+    }
+
     private static void copyDummyNativeLib(Context ctx, String name, File dest, String libFolder) throws IOException {
         File fileLib = new File(dest, "/"+libFolder + "/" + name);
         fileLib.delete();