Support PATCHVBMETAFLAG env variable

app/src/main/res/layout/fragment_install_md2.xml

@@ -9,6 +9,8 @@
 
         <import type="com.topjohnwu.magisk.core.Config" />
 
+        <import type="android.os.Build" />
+
         <variable
             name="viewModel"
             type="com.topjohnwu.magisk.ui.install.InstallViewModel" />
@@ -34,7 +36,7 @@
 
             <com.google.android.material.card.MaterialCardView
                 style="@style/WidgetFoundation.Card"
-                gone="@{viewModel.skipOptions}"
+                gone="@{viewModel.skipOptions || Info.isEmulator}"
                 android:layout_width="match_parent"
                 android:layout_height="wrap_content"
                 android:layout_marginStart="@dimen/l1"
@@ -108,6 +110,15 @@
                             android:text="@string/keep_force_encryption"
                             app:tint="?colorPrimary" />
 
+                        <CheckBox
+                            style="@style/WidgetFoundation.Checkbox"
+                            goneUnless="@{!Info.vbmeta &amp;&amp; Build.VERSION.SDK_INT >= 30}"
+                            android:layout_width="match_parent"
+                            android:layout_height="wrap_content"
+                            android:checked="@={Config.patchVbmeta}"
+                            android:text="@string/patch_vbmeta"
+                            app:tint="?colorPrimary" />
+
                         <CheckBox
                             style="@style/WidgetFoundation.Checkbox"
                             gone="@{Info.ramdisk}"

app/src/main/res/raw/manager.sh

@@ -179,6 +179,12 @@ check_encryption() {
   fi
 }
 
+check_vbmeta_partition() {
+  if [ -e /dev/block/by-name/vbmeta_a ] || [ -e /dev/block/by-name/vbmeta ]; then
+    VBMETAEXIST=true
+  fi
+}
+
 ##########################
 # Non-root util_functions
 ##########################
@@ -211,6 +217,7 @@ app_init() {
   SHA1=$(grep_prop SHA1 $MAGISKTMP/config)
   check_boot_ramdisk && RAMDISKEXIST=true || RAMDISKEXIST=false
   check_encryption
+  check_vbmeta_partition
   # Make sure RECOVERYMODE has value
   [ -z $RECOVERYMODE ] && RECOVERYMODE=false
 }

app/src/main/res/values/strings.xml

@@ -36,6 +36,7 @@
     <!--Install-->
     <string name="keep_force_encryption">Preserve force encryption</string>
     <string name="keep_dm_verity">Preserve AVB 2.0/dm-verity</string>
+    <string name="patch_vbmeta">Patch vbmeta in boot image</string>
     <string name="recovery_mode">Recovery Mode</string>
     <string name="install_options_title">Options</string>
     <string name="install_method_title">Method</string>