Patch the update script to force use mkbootfs

Cpio command from busybox is somehow broken on boot mode when
dealing with symlinks. Fortunately, anykernel still supports
mkbootfs, we can easily switch to it.

Author: libxzr

app/src/main/assets/mkbootfs

@@ -12,6 +12,8 @@
 import java.io.InputStreamReader;
 import java.io.OutputStreamWriter;
 
+import xzr.hkf.utils.AssetsUtil;
+
 public class Worker extends MainActivity.fileWorker {
     Activity activity;
     String file_path;
@@ -67,6 +69,11 @@ public void run() {
             return;
         }
 
+        try {
+            patch();
+        } catch (IOException ignored) {
+        }
+
         try {
             flash(activity);
         } catch (IOException ioException) {
@@ -116,6 +123,13 @@ void getBinary() throws IOException {
             throw new IOException();
     }
 
+    void patch() throws IOException {
+        final String mkbootfs_path = activity.getFilesDir().getAbsolutePath() + "/mkbootfs";
+        AssetsUtil.exportFiles(activity, "mkbootfs", mkbootfs_path);
+
+        runWithNewProcessNoReturn(false, "sed -i '/$BB chmod -R 755 tools bin;/i cp -f " + mkbootfs_path + " $AKHOME/tools;' " + binary_path);
+    }
+
     void flash(Activity activity) throws IOException {
         Process process = new ProcessBuilder("su").redirectErrorStream(true).start();
         OutputStreamWriter outputStreamWriter = new OutputStreamWriter(process.getOutputStream());

app/src/main/java/xzr/hkf/Worker.java

@@ -0,0 +1,32 @@
+package xzr.hkf.utils;
+
+import android.content.Context;
+
+import java.io.File;
+import java.io.FileOutputStream;
+import java.io.IOException;
+import java.io.InputStream;
+
+public class AssetsUtil {
+    public static void exportFiles(Context context, String src, String out) throws IOException {
+        String[] fileNames = context.getAssets().list(src);
+        if (fileNames.length > 0) {
+            File file = new File(out);
+            file.mkdirs();
+            for (String fileName : fileNames) {
+                exportFiles(context, src + "/" + fileName, out + "/" + fileName);
+            }
+        } else {
+            InputStream is = context.getAssets().open(src);
+            FileOutputStream fos = new FileOutputStream(new File(out));
+            byte[] buffer = new byte[1024];
+            int byteCount = 0;
+            while ((byteCount = is.read(buffer)) != -1) {
+                fos.write(buffer, 0, byteCount);
+            }
+            fos.flush();
+            is.close();
+            fos.close();
+        }
+    }
+}