sdk: migrate to SDK 28 and AndroidX

.travis.yml

@@ -5,15 +5,15 @@ android:
   components:
     - tools
     - platform-tools
-    - build-tools-27.0.3
+    - build-tools-28.0.3
-    - android-27
+    - android-28
     - extra-android-support
     - extra-google-m2repository
     - extra-android-m2repository
   licenses:
     - '.+'
 before_install:
-  - yes | sdkmanager "platforms;android-27"
+- yes | sdkmanager "platforms;android-28"
 script:
   - chmod 777 gradlew
   - ./gradlew clean assembleDebug

app/build.gradle

@@ -4,12 +4,12 @@ apply plugin: 'io.fabric'
 def gitCommit = 'git rev-parse --short HEAD'.execute([], project.rootDir).text.trim()
 
 android {
-    compileSdkVersion 27
+    compileSdkVersion 28
-    buildToolsVersion "27.0.3"
+    buildToolsVersion "28.0.3"
     defaultConfig {
         applicationId "org.itxtech.daedalus"
         minSdkVersion 15
-        targetSdkVersion 27
+        targetSdkVersion 28
         versionCode 17
         versionName "1.12.1"
 
@@ -39,19 +39,19 @@ android {
 
 dependencies {
     //Support
-    implementation 'com.android.support:appcompat-v7:27.1.1'
+    implementation 'androidx.appcompat:appcompat:1.0.0'
-    implementation 'com.android.support:design:27.1.1'
+    implementation 'androidx.legacy:legacy-support-v4:1.0.0'
-    implementation 'com.android.support:support-v4:27.1.1'
+    implementation 'androidx.percentlayout:percentlayout:1.0.0'
-    implementation 'com.android.support:percent:27.1.1'
+    implementation 'androidx.cardview:cardview:1.0.0'
-    implementation 'com.android.support:cardview-v7:27.1.1'
+    implementation 'com.google.android.material:material:1.0.0'
     //DNS
     implementation 'org.pcap4j:pcap4j-core:1.7.3'
     implementation 'org.pcap4j:pcap4j-packetfactory-static:1.7.3'
-    implementation 'org.minidns:minidns-client:0.3.2'
+    implementation 'org.minidns:minidns-client:0.3.3'
     implementation 'com.google.code.gson:gson:2.8.5'
     implementation 'com.squareup.okhttp3:okhttp:3.11.0'
     //Analytics
-    implementation 'com.google.firebase:firebase-core:16.0.4'
+    implementation 'com.google.firebase:firebase-core:16.0.5'
     implementation 'com.crashlytics.sdk.android:crashlytics:2.9.5'
 }
 

app/src/main/java/org/itxtech/daedalus/activity/ConfigActivity.java

@@ -5,10 +5,10 @@ import android.app.FragmentTransaction;
 import android.graphics.Color;
 import android.graphics.drawable.Drawable;
 import android.os.Bundle;
-import android.support.v4.content.ContextCompat;
+import androidx.appcompat.app.AppCompatActivity;
-import android.support.v4.graphics.drawable.DrawableCompat;
+import androidx.appcompat.widget.Toolbar;
-import android.support.v7.app.AppCompatActivity;
+import androidx.core.content.ContextCompat;
-import android.support.v7.widget.Toolbar;
+import androidx.core.graphics.drawable.DrawableCompat;
 import org.itxtech.daedalus.Daedalus;
 import org.itxtech.daedalus.R;
 import org.itxtech.daedalus.fragment.ConfigFragment;

app/src/main/java/org/itxtech/daedalus/activity/MainActivity.java

@@ -7,19 +7,19 @@ import android.content.DialogInterface;
 import android.content.Intent;
 import android.net.VpnService;
 import android.os.Bundle;
-import android.support.annotation.NonNull;
-import android.support.design.widget.NavigationView;
-import android.support.v4.view.GravityCompat;
-import android.support.v4.widget.DrawerLayout;
-import android.support.v7.app.ActionBarDrawerToggle;
-import android.support.v7.app.AlertDialog;
-import android.support.v7.app.AppCompatActivity;
-import android.support.v7.widget.Toolbar;
 import android.util.Log;
 import android.view.MenuItem;
 import android.view.inputmethod.InputMethodManager;
 import android.widget.Button;
 import android.widget.TextView;
+import androidx.annotation.NonNull;
+import androidx.appcompat.app.ActionBarDrawerToggle;
+import androidx.appcompat.app.AlertDialog;
+import androidx.appcompat.app.AppCompatActivity;
+import androidx.appcompat.widget.Toolbar;
+import androidx.core.view.GravityCompat;
+import androidx.drawerlayout.widget.DrawerLayout;
+import com.google.android.material.navigation.NavigationView;
 import org.itxtech.daedalus.BuildConfig;
 import org.itxtech.daedalus.Daedalus;
 import org.itxtech.daedalus.R;

app/src/main/java/org/itxtech/daedalus/fragment/ConfigFragment.java

@@ -2,7 +2,7 @@ package org.itxtech.daedalus.fragment;
 
 import android.content.Intent;
 import android.preference.PreferenceFragment;
-import android.support.v7.widget.Toolbar;
+import androidx.appcompat.widget.Toolbar;
 
 /**
  * Daedalus Project

app/src/main/java/org/itxtech/daedalus/fragment/DNSServerConfigFragment.java

@@ -3,11 +3,11 @@ package org.itxtech.daedalus.fragment;
 import android.app.AlertDialog;
 import android.os.Bundle;
 import android.preference.EditTextPreference;
-import android.support.design.widget.Snackbar;
 import android.view.LayoutInflater;
 import android.view.MenuItem;
 import android.view.View;
 import android.view.ViewGroup;
+import com.google.android.material.snackbar.Snackbar;
 import org.itxtech.daedalus.Daedalus;
 import org.itxtech.daedalus.R;
 import org.itxtech.daedalus.activity.ConfigActivity;

app/src/main/java/org/itxtech/daedalus/fragment/DNSServersFragment.java

@@ -2,16 +2,16 @@ package org.itxtech.daedalus.fragment;
 
 import android.content.Intent;
 import android.os.Bundle;
-import android.support.annotation.NonNull;
-import android.support.design.widget.FloatingActionButton;
-import android.support.design.widget.Snackbar;
-import android.support.v7.widget.LinearLayoutManager;
-import android.support.v7.widget.RecyclerView;
-import android.support.v7.widget.helper.ItemTouchHelper;
 import android.view.LayoutInflater;
 import android.view.View;
 import android.view.ViewGroup;
 import android.widget.TextView;
+import androidx.annotation.NonNull;
+import androidx.recyclerview.widget.ItemTouchHelper;
+import androidx.recyclerview.widget.LinearLayoutManager;
+import androidx.recyclerview.widget.RecyclerView;
+import com.google.android.material.floatingactionbutton.FloatingActionButton;
+import com.google.android.material.snackbar.Snackbar;
 import org.itxtech.daedalus.Daedalus;
 import org.itxtech.daedalus.R;
 import org.itxtech.daedalus.activity.ConfigActivity;

app/src/main/java/org/itxtech/daedalus/fragment/GlobalConfigFragment.java

@@ -4,8 +4,8 @@ import android.content.Intent;
 import android.os.Build;
 import android.os.Bundle;
 import android.preference.*;
-import android.support.design.widget.Snackbar;
 import android.view.View;
+import com.google.android.material.snackbar.Snackbar;
 import org.itxtech.daedalus.Daedalus;
 import org.itxtech.daedalus.R;
 import org.itxtech.daedalus.activity.MainActivity;

app/src/main/java/org/itxtech/daedalus/fragment/LogFragment.java

@@ -1,13 +1,13 @@
 package org.itxtech.daedalus.fragment;
 
 import android.os.Bundle;
-import android.support.design.widget.Snackbar;
-import android.support.v7.widget.Toolbar;
 import android.view.LayoutInflater;
 import android.view.MenuItem;
 import android.view.View;
 import android.view.ViewGroup;
 import android.widget.TextView;
+import androidx.appcompat.widget.Toolbar;
+import com.google.android.material.snackbar.Snackbar;
 import org.itxtech.daedalus.Daedalus;
 import org.itxtech.daedalus.R;
 import org.itxtech.daedalus.util.Logger;

app/src/main/java/org/itxtech/daedalus/fragment/RuleConfigFragment.java

@@ -11,11 +11,11 @@ import android.os.Handler;
 import android.os.Message;
 import android.preference.EditTextPreference;
 import android.preference.ListPreference;
-import android.support.design.widget.Snackbar;
 import android.view.LayoutInflater;
 import android.view.MenuItem;
 import android.view.View;
 import android.view.ViewGroup;
+import com.google.android.material.snackbar.Snackbar;
 import okhttp3.OkHttpClient;
 import okhttp3.Request;
 import okhttp3.Response;

app/src/main/java/org/itxtech/daedalus/fragment/RulesFragment.java

@@ -2,18 +2,18 @@ package org.itxtech.daedalus.fragment;
 
 import android.content.Intent;
 import android.os.Bundle;
-import android.support.annotation.NonNull;
-import android.support.design.widget.FloatingActionButton;
-import android.support.design.widget.Snackbar;
-import android.support.v7.widget.LinearLayoutManager;
-import android.support.v7.widget.RecyclerView;
-import android.support.v7.widget.Toolbar;
-import android.support.v7.widget.helper.ItemTouchHelper;
 import android.view.LayoutInflater;
 import android.view.MenuItem;
 import android.view.View;
 import android.view.ViewGroup;
 import android.widget.TextView;
+import androidx.annotation.NonNull;
+import androidx.appcompat.widget.Toolbar;
+import androidx.recyclerview.widget.ItemTouchHelper;
+import androidx.recyclerview.widget.LinearLayoutManager;
+import androidx.recyclerview.widget.RecyclerView;
+import com.google.android.material.floatingactionbutton.FloatingActionButton;
+import com.google.android.material.snackbar.Snackbar;
 import org.itxtech.daedalus.Daedalus;
 import org.itxtech.daedalus.R;
 import org.itxtech.daedalus.activity.ConfigActivity;

app/src/main/java/org/itxtech/daedalus/fragment/ToolbarFragment.java

@@ -2,10 +2,10 @@ package org.itxtech.daedalus.fragment;
 
 import android.app.Fragment;
 import android.os.Bundle;
-import android.support.design.widget.NavigationView;
-import android.support.v7.widget.Toolbar;
 import android.view.Menu;
 import android.view.View;
+import androidx.appcompat.widget.Toolbar;
+import com.google.android.material.navigation.NavigationView;
 import org.itxtech.daedalus.R;
 
 /**

app/src/main/java/org/itxtech/daedalus/provider/HttpsProvider.java

@@ -3,11 +3,11 @@ package org.itxtech.daedalus.provider;
 import android.annotation.TargetApi;
 import android.os.Build;
 import android.os.ParcelFileDescriptor;
-import android.support.annotation.NonNull;
 import android.system.Os;
 import android.system.OsConstants;
 import android.system.StructPollfd;
 import android.util.Log;
+import androidx.annotation.NonNull;
 import org.itxtech.daedalus.Daedalus;
 import org.itxtech.daedalus.service.DaedalusVpnService;
 import org.itxtech.daedalus.util.Logger;

app/src/main/java/org/itxtech/daedalus/provider/TcpProvider.java

@@ -3,12 +3,12 @@ package org.itxtech.daedalus.provider;
 import android.annotation.TargetApi;
 import android.os.Build;
 import android.os.ParcelFileDescriptor;
-import android.support.annotation.NonNull;
 import android.system.ErrnoException;
 import android.system.Os;
 import android.system.OsConstants;
 import android.system.StructPollfd;
 import android.util.Log;
+import androidx.annotation.NonNull;
 import org.itxtech.daedalus.service.DaedalusVpnService;
 import org.itxtech.daedalus.util.Logger;
 import org.itxtech.daedalus.util.server.DNSServerHelper;

app/src/main/java/org/itxtech/daedalus/provider/UdpProvider.java

@@ -3,11 +3,11 @@ package org.itxtech.daedalus.provider;
 import android.annotation.TargetApi;
 import android.os.Build;
 import android.os.ParcelFileDescriptor;
-import android.support.annotation.NonNull;
 import android.system.Os;
 import android.system.OsConstants;
 import android.system.StructPollfd;
 import android.util.Log;
+import androidx.annotation.NonNull;
 import org.itxtech.daedalus.Daedalus;
 import org.itxtech.daedalus.service.DaedalusVpnService;
 import org.itxtech.daedalus.util.Logger;

app/src/main/java/org/itxtech/daedalus/service/DaedalusTileService.java

@@ -3,7 +3,7 @@ package org.itxtech.daedalus.service;
 import android.os.Build;
 import android.service.quicksettings.Tile;
 import android.service.quicksettings.TileService;
-import android.support.annotation.RequiresApi;
+import androidx.annotation.RequiresApi;
 import org.itxtech.daedalus.Daedalus;
 import org.itxtech.daedalus.R;
 

app/src/main/java/org/itxtech/daedalus/service/DaedalusVpnService.java

@@ -10,9 +10,9 @@ import android.content.Intent;
 import android.net.VpnService;
 import android.os.Build;
 import android.os.ParcelFileDescriptor;
-import android.support.v4.app.NotificationCompat;
 import android.system.OsConstants;
 import android.util.Log;
+import androidx.core.app.NotificationCompat;
 import org.itxtech.daedalus.Daedalus;
 import org.itxtech.daedalus.R;
 import org.itxtech.daedalus.activity.MainActivity;

app/src/main/java/org/itxtech/daedalus/widget/ClearAutoCompleteTextView.java

@@ -2,14 +2,14 @@ package org.itxtech.daedalus.widget;
 
 import android.content.Context;
 import android.graphics.drawable.Drawable;
-import android.support.v4.content.ContextCompat;
-import android.support.v4.graphics.drawable.DrawableCompat;
-import android.support.v7.widget.AppCompatAutoCompleteTextView;
 import android.text.Editable;
 import android.text.TextWatcher;
 import android.util.AttributeSet;
 import android.view.MotionEvent;
 import android.view.View;
+import androidx.appcompat.widget.AppCompatAutoCompleteTextView;
+import androidx.core.content.ContextCompat;
+import androidx.core.graphics.drawable.DrawableCompat;
 import org.itxtech.daedalus.R;
 
 /**

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

@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="utf-8"?>
-<android.support.design.widget.CoordinatorLayout
+<androidx.coordinatorlayout.widget.CoordinatorLayout
         xmlns:android="http://schemas.android.com/apk/res/android"
         xmlns:app="http://schemas.android.com/apk/res-auto"
         xmlns:tools="http://schemas.android.com/tools"
@@ -7,19 +7,19 @@
         android:layout_height="match_parent"
         android:fitsSystemWindows="true">
 
-    <android.support.design.widget.AppBarLayout
+    <com.google.android.material.appbar.AppBarLayout
             android:layout_height="wrap_content"
             android:layout_width="match_parent"
             android:theme="@style/AppTheme.AppBarOverlay">
 
-        <android.support.v7.widget.Toolbar
+        <androidx.appcompat.widget.Toolbar
                 android:id="@+id/toolbar_config"
                 android:layout_width="match_parent"
                 android:layout_height="?android:attr/actionBarSize"
                 android:background="@color/colorPrimary"
                 app:popupTheme="@style/AppTheme.PopupOverlay"/>
 
-    </android.support.design.widget.AppBarLayout>
+    </com.google.android.material.appbar.AppBarLayout>
 
     <RelativeLayout
             android:id="@+id/id_config"
@@ -29,4 +29,4 @@
             tools:context="org.itxtech.daedalus.activity.ConfigActivity">
 
     </RelativeLayout>
-</android.support.design.widget.CoordinatorLayout>
+</androidx.coordinatorlayout.widget.CoordinatorLayout>

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

@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="utf-8"?>
-<android.support.v4.widget.DrawerLayout
+<androidx.drawerlayout.widget.DrawerLayout
         xmlns:android="http://schemas.android.com/apk/res/android"
         xmlns:app="http://schemas.android.com/apk/res-auto"
         xmlns:tools="http://schemas.android.com/tools"
@@ -14,7 +14,7 @@
             android:layout_width="match_parent"
             android:layout_height="match_parent"/>
 
-    <android.support.design.widget.NavigationView
+    <com.google.android.material.navigation.NavigationView
             android:id="@+id/nav_view"
             android:layout_width="wrap_content"
             android:layout_height="match_parent"
@@ -22,4 +22,4 @@
             android:fitsSystemWindows="true"
             app:headerLayout="@layout/nav_header_main"
             app:menu="@menu/activity_main_drawer"/>
-</android.support.v4.widget.DrawerLayout>
+</androidx.drawerlayout.widget.DrawerLayout>

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

@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="utf-8"?>
-<android.support.design.widget.CoordinatorLayout
+<androidx.coordinatorlayout.widget.CoordinatorLayout
         xmlns:android="http://schemas.android.com/apk/res/android"
         xmlns:app="http://schemas.android.com/apk/res-auto"
         xmlns:tools="http://schemas.android.com/tools"
@@ -7,21 +7,21 @@
         android:layout_height="match_parent"
         android:fitsSystemWindows="true">
 
-    <android.support.design.widget.AppBarLayout
+    <com.google.android.material.appbar.AppBarLayout
             android:layout_height="wrap_content"
             android:layout_width="match_parent"
             android:theme="@style/AppTheme.AppBarOverlay">
 
-        <android.support.v7.widget.Toolbar
+        <androidx.appcompat.widget.Toolbar
                 android:id="@+id/toolbar"
                 android:layout_width="match_parent"
                 android:layout_height="?android:attr/actionBarSize"
                 android:background="@color/colorPrimary"
                 app:popupTheme="@style/AppTheme.PopupOverlay"/>
 
-    </android.support.design.widget.AppBarLayout>
+    </com.google.android.material.appbar.AppBarLayout>
 
-    <android.support.design.widget.CoordinatorLayout
+    <androidx.coordinatorlayout.widget.CoordinatorLayout
             android:id="@+id/id_content"
             android:layout_width="match_parent"
             android:layout_height="match_parent"
@@ -29,4 +29,4 @@
             tools:context=".activity.MainActivity"
             tools:showIn="@layout/app_bar_main"/>
 
-</android.support.design.widget.CoordinatorLayout>
+</androidx.coordinatorlayout.widget.CoordinatorLayout>

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

@@ -3,7 +3,7 @@
              xmlns:app="http://schemas.android.com/apk/res-auto"
              android:layout_width="match_parent"
              android:layout_height="wrap_content">
-    <android.support.v7.widget.CardView
+    <androidx.cardview.widget.CardView
             android:layout_height="wrap_content"
             android:layout_width="match_parent"
             android:layout_gravity="center_horizontal"
@@ -56,5 +56,5 @@
                           android:textAppearance="?android:attr/textAppearanceSmall"/>
             </RelativeLayout>
         </LinearLayout>
-    </android.support.v7.widget.CardView>
+    </androidx.cardview.widget.CardView>
 </FrameLayout>

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

@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="utf-8"?>
-<android.support.v7.widget.CardView
+<androidx.cardview.widget.CardView
         xmlns:android="http://schemas.android.com/apk/res/android"
         xmlns:app="http://schemas.android.com/apk/res-auto"
         android:layout_height="wrap_content"
@@ -38,4 +38,4 @@
                 android:layout_alignParentStart="true"/>
 
     </RelativeLayout>
-</android.support.v7.widget.CardView>
+</androidx.cardview.widget.CardView>

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

@@ -1,11 +1,11 @@
 <?xml version="1.0" encoding="utf-8"?>
-<android.support.design.widget.CoordinatorLayout
+<androidx.coordinatorlayout.widget.CoordinatorLayout
         xmlns:android="http://schemas.android.com/apk/res/android"
         android:id="@+id/fragment_dns_servers"
         android:layout_width="match_parent"
         android:layout_height="match_parent">
 
-    <android.support.v7.widget.RecyclerView
+    <androidx.recyclerview.widget.RecyclerView
             android:id="@+id/recyclerView_dns_servers"
             android:layout_width="match_parent"
             android:layout_height="match_parent"
@@ -14,7 +14,7 @@
             android:layout_alignParentLeft="true"
             android:layout_alignParentStart="true"/>
 
-    <android.support.design.widget.FloatingActionButton
+    <com.google.android.material.floatingactionbutton.FloatingActionButton
             android:id="@+id/fab_add_server"
             android:layout_width="wrap_content"
             android:layout_height="wrap_content"
@@ -23,4 +23,4 @@
             android:src="@drawable/ic_note_add"
             android:tint="#FFFFFF"/>
 
-</android.support.design.widget.CoordinatorLayout>
+</androidx.coordinatorlayout.widget.CoordinatorLayout>

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

@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="utf-8"?>
-<android.support.percent.PercentRelativeLayout
+<androidx.percentlayout.widget.PercentRelativeLayout
         xmlns:android="http://schemas.android.com/apk/res/android"
         xmlns:tools="http://schemas.android.com/tools"
         xmlns:app="http://schemas.android.com/apk/res-auto"
@@ -50,4 +50,4 @@
             android:id="@+id/button_activate"
             app:layout_marginTopPercent="10%"
             android:layout_alignTop="@+id/textView_notice" android:layout_centerHorizontal="true"/>
-</android.support.percent.PercentRelativeLayout>
+</androidx.percentlayout.widget.PercentRelativeLayout>

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

@@ -1,11 +1,11 @@
 <?xml version="1.0" encoding="utf-8"?>
-<android.support.design.widget.CoordinatorLayout
+<androidx.coordinatorlayout.widget.CoordinatorLayout
         xmlns:android="http://schemas.android.com/apk/res/android"
         android:id="@+id/fragment_rules"
         android:layout_width="match_parent"
         android:layout_height="match_parent">
 
-    <android.support.v7.widget.RecyclerView
+    <androidx.recyclerview.widget.RecyclerView
             android:id="@+id/recyclerView_rules"
             android:layout_width="match_parent"
             android:layout_height="match_parent"
@@ -14,7 +14,7 @@
             android:layout_alignParentLeft="true"
             android:layout_alignParentStart="true"/>
 
-    <android.support.design.widget.FloatingActionButton
+    <com.google.android.material.floatingactionbutton.FloatingActionButton
             android:id="@+id/fab_add_rule"
             android:layout_width="wrap_content"
             android:layout_height="wrap_content"
@@ -23,4 +23,4 @@
             android:src="@drawable/ic_note_add"
             android:tint="#FFFFFF"/>
 
-</android.support.design.widget.CoordinatorLayout>
+</androidx.coordinatorlayout.widget.CoordinatorLayout>

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

@@ -1,4 +1,4 @@
-<android.support.design.widget.CoordinatorLayout
+<androidx.coordinatorlayout.widget.CoordinatorLayout
         xmlns:android="http://schemas.android.com/apk/res/android"
         xmlns:app="http://schemas.android.com/apk/res-auto"
         xmlns:tools="http://schemas.android.com/tools"

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

@@ -71,7 +71,7 @@
     <string name="settings_dns_tcp">TCP</string>
     <string name="settings_dns_udp">UDP</string>
     <string name="settings_dns_tls">TLS</string>
-    <string name="settings_dns_https_ietf">HTTPS (IETF draft)</string>
+    <string name="settings_dns_https_ietf">HTTPS (RFC8484)</string>
     <string name="settings_dns_https_json">HTTPS (Google JSON)</string>
 
     <string name="settings_rule_name">Rule Name</string>

build.gradle

@@ -9,7 +9,7 @@ buildscript {
         }
     }
     dependencies {
-        classpath 'com.android.tools.build:gradle:3.1.4'
+        classpath 'com.android.tools.build:gradle:3.2.1'
         classpath 'com.google.gms:google-services:4.0.1'
         classpath 'io.fabric.tools:gradle:1.25.4'
 

gradle.properties

@@ -6,6 +6,8 @@
 # http://www.gradle.org/docs/current/userguide/build_environment.html
 # Specifies the JVM arguments used for the daemon process.
 # The setting is particularly useful for tweaking memory settings.
+android.enableJetifier=true
+android.useAndroidX=true
 org.gradle.jvmargs=-Xmx1536m
 # When configured, Gradle will run in incubating parallel mode.
 # This option should only be used with decoupled projects. More details, visit