Move Magisk Manager files into subfolder

app/src/full/java/com/topjohnwu/magisk/utils/ZipUtils.java

@@ -0,0 +1,69 @@
+package com.topjohnwu.magisk.utils;
+
+import com.topjohnwu.superuser.ShellUtils;
+import com.topjohnwu.superuser.io.SuFile;
+import com.topjohnwu.superuser.io.SuFileOutputStream;
+import com.topjohnwu.utils.JarMap;
+import com.topjohnwu.utils.SignAPK;
+
+import java.io.BufferedInputStream;
+import java.io.BufferedOutputStream;
+import java.io.File;
+import java.io.FileInputStream;
+import java.io.FileOutputStream;
+import java.io.IOException;
+import java.io.InputStream;
+import java.io.OutputStream;
+import java.util.zip.ZipEntry;
+import java.util.zip.ZipInputStream;
+
+public class ZipUtils {
+
+    public static void unzip(File zip, File folder, String path, boolean junkPath) throws IOException {
+        InputStream in = new BufferedInputStream(new FileInputStream(zip));
+        unzip(in, folder, path, junkPath);
+        in.close();
+    }
+
+    public static void unzip(InputStream zip, File folder, String path, boolean junkPath) throws IOException {
+        try {
+            ZipInputStream zipfile = new ZipInputStream(zip);
+            ZipEntry entry;
+            while ((entry = zipfile.getNextEntry()) != null) {
+                if (!entry.getName().startsWith(path) || entry.isDirectory()){
+                    // Ignore directories, only create files
+                    continue;
+                }
+                String name;
+                if (junkPath) {
+                    name = entry.getName().substring(entry.getName().lastIndexOf('/') + 1);
+                } else {
+                    name = entry.getName();
+                }
+                File dest = new File(folder, name);
+                if (!dest.getParentFile().exists() && !dest.getParentFile().mkdirs()) {
+                    dest = new SuFile(folder, name);
+                    dest.getParentFile().mkdirs();
+                }
+                try (OutputStream out = new SuFileOutputStream(dest)) {
+                    ShellUtils.pump(zipfile, out);
+                }
+            }
+        }
+        catch(IOException e) {
+            e.printStackTrace();
+            throw e;
+        }
+    }
+
+    public static void signZip(File input, File output) throws Exception {
+        try (JarMap map = new JarMap(input, false);
+             BufferedOutputStream out = new BufferedOutputStream(new FileOutputStream(output))) {
+            signZip(map, out);
+        }
+    }
+
+    public static void signZip(JarMap input, OutputStream output) throws Exception {
+        SignAPK.signZip(null, null, input, output);
+    }
+}