feat(pwa) add TWA generated files

twa-manifest.json

@@ -0,0 +1,31 @@
+{
+  "packageId": "org.jitsi.meet",
+  "host": "meet.jit.si",
+  "name": "Jitsi Meet",
+  "launcherName": "Jitsi Meet",
+  "display": "standalone",
+  "themeColor": "#2A3A4B",
+  "navigationColor": "#000000",
+  "navigationColorDark": "#000000",
+  "navigationDividerColor": "#000000",
+  "navigationDividerColorDark": "#000000",
+  "backgroundColor": "#2A3A4B",
+  "enableNotifications": false,
+  "startUrl": "/",
+  "iconUrl": "https://alpha.jitsi.net/static/pwa/icons/icon512.png",
+  "splashScreenFadeOutDuration": 300,
+  "signingKey": {
+    "path": "./android/app/debug.keystore",
+    "alias": "android"
+  },
+  "appVersionName": "1",
+  "appVersionCode": 1,
+  "shortcuts": [],
+  "generatorApp": "bubblewrap-cli",
+  "webManifestUrl": "https://alpha.jitsi.net/static/pwa/manifest.json",
+  "fallbackType": "customtabs",
+  "features": {},
+  "enableSiteSettingsShortcut": true,
+  "isChromeOSOnly": false,
+  "appVersion": "1"
+}

twa/app/build.gradle

@@ -0,0 +1,196 @@
+/*
+ * Copyright 2019 Google Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+import groovy.xml.MarkupBuilder
+
+apply plugin: 'com.android.application'
+
+def twaManifest = [
+    applicationId: 'org.jitsi.meet',
+    hostName: 'meet.jit.si', // The domain being opened in the TWA.
+    launchUrl: '/', // The start path for the TWA. Must be relative to the domain.
+    name: 'Jitsi Meet', // The application name.
+    launcherName: 'Jitsi Meet', // The name shown on the Android Launcher.
+    themeColor: '#2A3A4B', // The color used for the status bar.
+    navigationColor: '#000000', // The color used for the navigation bar.
+    navigationColorDark: '#000000', // The color used for the dark navbar.
+    navigationDividerColor: '#000000', // The navbar divider color.
+    navigationDividerColorDark: '#000000', // The dark navbar divider color.
+    backgroundColor: '#2A3A4B', // The color used for the splash screen background.
+    enableNotifications: false, // Set to true to enable notification delegation.
+    // Every shortcut must include the following fields:
+    // - name: String that will show up in the shortcut.
+    // - short_name: Shorter string used if |name| is too long.
+    // - url: Absolute path of the URL to launch the app with (e.g '/create').
+    // - icon: Name of the resource in the drawable folder to use as an icon.
+    shortcuts: [],
+    // The duration of fade out animation in milliseconds to be played when removing splash screen.
+    splashScreenFadeOutDuration: 300,
+    generatorApp: 'bubblewrap-cli', // Application that generated the Android Project
+    // The fallback strategy for when Trusted Web Activity is not avilable. Possible values are
+    // 'customtabs' and 'webview'.
+    fallbackType: 'customtabs',
+    enableSiteSettingsShortcut: 'true',
+]
+
+android {
+    compileSdkVersion 29
+    defaultConfig {
+        applicationId "org.jitsi.meet"
+        minSdkVersion 19
+        targetSdkVersion 29
+        versionCode 1
+        versionName "1"
+
+        // The name for the application
+        resValue "string", "appName", twaManifest.name
+
+        // The name for the application on the Android Launcher
+        resValue "string", "launcherName", twaManifest.launcherName
+
+        // The URL that will be used when launching the TWA from the Android Launcher
+        def launchUrl = "https://" + twaManifest.hostName + twaManifest.launchUrl
+        resValue "string", "launchUrl", launchUrl
+
+        
+            // The URL the Web Manifest for the Progressive Web App that the TWA points to. This
+            // is used by Chrome OS to open the Web version of the PWA instead of the TWA, as it
+            // will probably give a better user experience for non-mobile devices.
+            resValue "string", "webManifestUrl", 'https://alpha.jitsi.net/static/pwa/manifest.json'
+        
+
+        // The hostname is used when building the intent-filter, so the TWA is able to
+        // handle Intents to open https://svgomg.firebaseapp.com.
+        resValue "string", "hostName", twaManifest.hostName
+
+        // This variable below expresses the relationship between the app and the site,
+        // as documented in the TWA documentation at
+        // https://developers.google.com/web/updates/2017/10/using-twa#set_up_digital_asset_links_in_an_android_app
+        // and is injected into the AndroidManifest.xml
+        resValue "string", "assetStatements",
+                '[{ \\"relation\\": [\\"delegate_permission/common.handle_all_urls\\"],' +
+                        '\\"target\\": {\\"namespace\\": \\"web\\", \\"site\\": \\"https://' +
+                        twaManifest.hostName + '\\"}}]'
+
+        // This attribute sets the status bar color for the TWA. It can be either set here or in
+        // `res/values/colors.xml`. Setting in both places is an error and the app will not
+        // compile. If not set, the status bar color defaults to #FFFFFF - white.
+        resValue "color", "colorPrimary", twaManifest.themeColor
+
+        // This attribute sets the navigation bar color for the TWA. It can be either set here or
+        // in `res/values/colors.xml`. Setting in both places is an error and the app will not
+        // compile. If not set, the navigation bar color defaults to #FFFFFF - white.
+        resValue "color", "navigationColor", twaManifest.navigationColor
+
+        // This attribute sets the dark navigation bar color for the TWA. It can be either set here
+        // or in `res/values/colors.xml`. Setting in both places is an error and the app will not
+        // compile. If not set, the navigation bar color defaults to #000000 - black.
+        resValue "color", "navigationColorDark", twaManifest.navigationColorDark
+
+        // This attribute sets the navbar divider color for the TWA. It can be either 
+        // set here or in `res/values/colors.xml`. Setting in both places is an error and the app 
+        // will not compile. If not set, the divider color defaults to #00000000 - transparent.
+        resValue "color", "navigationDividerColor", twaManifest.navigationDividerColor
+
+        // This attribute sets the dark navbar divider color for the TWA. It can be either 
+        // set here or in `res/values/colors.xml`. Setting in both places is an error and the 
+        //app will not compile. If not set, the divider color defaults to #000000 - black.
+        resValue "color", "navigationDividerColorDark", twaManifest.navigationDividerColorDark
+
+        // Sets the color for the background used for the splash screen when launching the
+        // Trusted Web Activity.
+        resValue "color", "backgroundColor", twaManifest.backgroundColor
+
+        // Defines a provider authority fot the Splash Screen
+        resValue "string", "providerAuthority", twaManifest.applicationId + '.fileprovider'
+
+        // The enableNotification resource is used to enable or disable the
+        // TrustedWebActivityService, by changing the android:enabled and android:exported
+        // attributes
+        resValue "bool", "enableNotification", twaManifest.enableNotifications.toString()
+
+        twaManifest.shortcuts.eachWithIndex { shortcut, index ->
+            resValue "string", "shortcut_name_$index", "$shortcut.name"
+            resValue "string", "shortcut_short_name_$index", "$shortcut.short_name"
+        }
+
+        // The splashScreenFadeOutDuration resource is used to set the duration of fade out animation in milliseconds
+        // to be played when removing splash screen. The default is 0 (no animation).
+        resValue "integer", "splashScreenFadeOutDuration", twaManifest.splashScreenFadeOutDuration.toString()
+
+        resValue "string", "generatorApp", twaManifest.generatorApp
+
+        resValue "string", "fallbackType", twaManifest.fallbackType
+
+        resValue "bool", "enableSiteSettingsShortcut", twaManifest.enableSiteSettingsShortcut
+    }
+    buildTypes {
+        release {
+            minifyEnabled true
+        }
+    }
+    compileOptions {
+        sourceCompatibility JavaVersion.VERSION_1_8
+        targetCompatibility JavaVersion.VERSION_1_8
+    }
+}
+
+task generateShorcutsFile {
+    assert twaManifest.shortcuts.size() < 5, "You can have at most 4 shortcuts."
+    twaManifest.shortcuts.eachWithIndex { s, i ->
+        assert s.name != null, 'Missing `name` in shortcut #' + i
+        assert s.short_name != null, 'Missing `short_name` in shortcut #' + i
+        assert s.url != null, 'Missing `icon` in shortcut #' + i
+        assert s.icon != null, 'Missing `url` in shortcut #' + i
+    }
+
+    def shortcutsFile = new File("$projectDir/src/main/res/xml", "shortcuts.xml")
+
+    def xmlWriter = new StringWriter()
+    def xmlMarkup = new MarkupBuilder(new IndentPrinter(xmlWriter, "    ", true))
+
+    xmlMarkup
+        .'shortcuts'('xmlns:android': 'http://schemas.android.com/apk/res/android') {
+            twaManifest.shortcuts.eachWithIndex { s, i ->
+                'shortcut'(
+                        'android:shortcutId': 'shortcut' + i,
+                        'android:enabled': 'true',
+                        'android:icon': '@drawable/' + s.icon,
+                        'android:shortcutShortLabel': '@string/shortcut_short_name_' + i,
+                        'android:shortcutLongLabel': '@string/shortcut_name_' + i) {
+                    'intent'(
+                            'android:action': 'android.intent.action.MAIN',
+                            'android:targetPackage': twaManifest.applicationId,
+                            'android:targetClass': twaManifest.applicationId + '.LauncherActivity',
+                            'android:data': s.url)
+                    'categories'('android:name': 'android.intent.category.LAUNCHER')
+                }
+            }
+        }
+    shortcutsFile.text = xmlWriter.toString() + '\n'
+}
+
+preBuild.dependsOn(generateShorcutsFile)
+
+repositories {
+    
+}
+
+dependencies {
+    implementation fileTree(include: ['*.jar'], dir: 'libs')
+    
+    implementation 'com.google.androidbrowserhelper:androidbrowserhelper:2.0.0'    
+}

twa/app/src/main/AndroidManifest.xml

@@ -0,0 +1,149 @@
+<!--
+    Copyright 2019 Google Inc. All Rights Reserved.
+
+     Licensed under the Apache License, Version 2.0 (the "License");
+     you may not use this file except in compliance with the License.
+     You may obtain a copy of the License at
+
+         http://www.apache.org/licenses/LICENSE-2.0
+
+     Unless required by applicable law or agreed to in writing, software
+     distributed under the License is distributed on an "AS IS" BASIS,
+     WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+     See the License for the specific language governing permissions and
+     limitations under the License.
+-->
+
+<!-- The "package" attribute is rewritten by the Gradle build with the value of applicationId.
+     It is still required here, as it is used to derive paths, for instance when referring
+     to an Activity by ".MyActivity" instead of the full name. If more Activities are added to the
+     application, the package attribute will need to reflect the correct path in order to use
+     the abbreviated format. -->
+<manifest xmlns:android="http://schemas.android.com/apk/res/android"
+    package="org.jitsi.meet">
+
+    
+
+    
+
+    <application
+        android:name="Application"
+        android:allowBackup="true"
+        android:icon="@mipmap/ic_launcher"
+        android:label="@string/appName"
+        
+        android:manageSpaceActivity="com.google.androidbrowserhelper.trusted.ManageDataLauncherActivity"
+        
+        android:supportsRtl="true"
+        android:theme="@android:style/Theme.Translucent.NoTitleBar">
+
+        <meta-data
+            android:name="asset_statements"
+            android:resource="@string/assetStatements" />
+
+        
+            <meta-data
+                android:name="web_manifest_url"
+                android:value="@string/webManifestUrl" />
+        
+
+        <meta-data
+            android:name="twa_generator"
+            android:value="@string/generatorApp" />
+
+        
+            <activity android:name="com.google.androidbrowserhelper.trusted.ManageDataLauncherActivity">
+            <meta-data
+                android:name="android.support.customtabs.trusted.MANAGE_SPACE_URL"
+                android:value="@string/launchUrl" />
+            </activity>
+        
+        
+        <activity android:name="LauncherActivity"
+            android:label="@string/launcherName">
+            <meta-data android:name="android.support.customtabs.trusted.DEFAULT_URL"
+                android:value="@string/launchUrl" />
+
+            <meta-data
+                android:name="android.support.customtabs.trusted.STATUS_BAR_COLOR"
+                android:resource="@color/colorPrimary" />
+
+            <meta-data
+                android:name="android.support.customtabs.trusted.NAVIGATION_BAR_COLOR"
+                android:resource="@color/navigationColor" />
+
+            <meta-data
+                android:name="android.support.customtabs.trusted.NAVIGATION_BAR_COLOR_DARK"
+                android:resource="@color/navigationColorDark" />
+
+            <meta-data
+                android:name="androix.browser.trusted.NAVIGATION_BAR_DIVIDER_COLOR"
+                android:resource="@color/navigationDividerColor" />
+
+            <meta-data
+                android:name="androix.browser.trusted.NAVIGATION_BAR_DIVIDER_COLOR_DARK"
+                android:resource="@color/navigationDividerColorDark" />
+
+            <meta-data android:name="android.support.customtabs.trusted.SPLASH_IMAGE_DRAWABLE"
+                android:resource="@drawable/splash"/>
+
+            <meta-data android:name="android.support.customtabs.trusted.SPLASH_SCREEN_BACKGROUND_COLOR"
+                android:resource="@color/backgroundColor"/>
+
+            <meta-data android:name="android.support.customtabs.trusted.SPLASH_SCREEN_FADE_OUT_DURATION"
+                android:value="@integer/splashScreenFadeOutDuration"/>
+
+            <meta-data android:name="android.support.customtabs.trusted.FILE_PROVIDER_AUTHORITY"
+                android:value="@string/providerAuthority"/>
+
+            <meta-data android:name="android.app.shortcuts" android:resource="@xml/shortcuts" />
+
+            <meta-data android:name="android.support.customtabs.trusted.FALLBACK_STRATEGY"
+                android:value="@string/fallbackType" />
+
+            
+            <intent-filter>
+                <action android:name="android.intent.action.MAIN" />
+                <category android:name="android.intent.category.LAUNCHER" />
+            </intent-filter>
+
+            <intent-filter android:autoVerify="true">
+                <action android:name="android.intent.action.VIEW"/>
+                <category android:name="android.intent.category.DEFAULT" />
+                <category android:name="android.intent.category.BROWSABLE"/>
+                <data android:scheme="https"
+                    android:host="@string/hostName"/>
+            </intent-filter>
+        </activity>
+
+        <activity android:name="com.google.androidbrowserhelper.trusted.FocusActivity" />
+
+        <activity android:name="com.google.androidbrowserhelper.trusted.WebViewFallbackActivity"
+            android:configChanges="orientation|screenSize" />
+
+        <provider
+            android:name="androidx.core.content.FileProvider"
+            android:authorities="@string/providerAuthority"
+            android:grantUriPermissions="true"
+            android:exported="false">
+            <meta-data
+                android:name="android.support.FILE_PROVIDER_PATHS"
+                android:resource="@xml/filepaths" />
+        </provider>
+
+        <service
+            android:name="com.google.androidbrowserhelper.trusted.DelegationService"
+            android:enabled="@bool/enableNotification"
+            android:exported="@bool/enableNotification">
+
+            
+
+            <intent-filter>
+                <action android:name="android.support.customtabs.trusted.TRUSTED_WEB_ACTIVITY_SERVICE"/>
+                <category android:name="android.intent.category.DEFAULT"/>
+            </intent-filter>
+        </service>
+
+        
+    </application>
+</manifest>

twa/app/src/main/java/org/jitsi/meet/Application.java

@@ -0,0 +1,29 @@
+/*
+ * Copyright 2020 Google Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.jitsi.meet;
+
+
+
+public class Application extends android.app.Application {
+
+  
+
+  @Override
+  public void onCreate() {
+      super.onCreate();
+      
+  }
+}

twa/app/src/main/java/org/jitsi/meet/LauncherActivity.java

@@ -0,0 +1,37 @@
+/*
+ * Copyright 2020 Google Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.jitsi.meet;
+
+import android.net.Uri;
+
+
+
+public class LauncherActivity
+        extends com.google.androidbrowserhelper.trusted.LauncherActivity {
+    
+
+    
+
+    @Override
+    protected Uri getLaunchingUrl() {
+        // Get the original launch Url.
+        Uri uri = super.getLaunchingUrl();
+
+        
+
+        return uri;
+    }
+}

twa/app/src/main/res/drawable-anydpi/shortcut_legacy_background.xml

@@ -0,0 +1,25 @@
+<!--
+    Copyright 2020 Google Inc. All Rights Reserved.
+
+     Licensed under the Apache License, Version 2.0 (the "License");
+     you may not use this file except in compliance with the License.
+     You may obtain a copy of the License at
+
+         http://www.apache.org/licenses/LICENSE-2.0
+
+     Unless required by applicable law or agreed to in writing, software
+     distributed under the License is distributed on an "AS IS" BASIS,
+     WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+     See the License for the specific language governing permissions and
+     limitations under the License.
+-->
+<inset xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:aapt="http://schemas.android.com/aapt"
+    android:inset="2dp">
+    <aapt:attr name="android:drawable">
+        <shape android:shape="oval">
+            <solid android:color="@color/shortcut_background" />
+            <size android:width="44dp" android:height="44dp" />
+        </shape>
+    </aapt:attr>
+</inset>

twa/app/src/main/res/raw/web_app_manifest.json

@@ -0,0 +1 @@
+{"android_package_name":"org.jitsi.meet","prefer_related_applications":true,"related_applications":[{"id":"org.jitsi.meet","platform":"chromeos_play"}],"short_name":"Jitsi Meet","name":"Jitsi Meet","icons":[{"src":"icons/icon192.png","type":"image/png","sizes":"192x192"},{"src":"icons/icon512.png","type":"image/png","sizes":"512x512"}],"start_url":"/","background_color":"#2a3a4b","display":"standalone","scope":"/","theme_color":"#2a3a4b"}

twa/app/src/main/res/values/colors.xml

@@ -0,0 +1,18 @@
+<!--
+    Copyright 2020 Google Inc. All Rights Reserved.
+
+     Licensed under the Apache License, Version 2.0 (the "License");
+     you may not use this file except in compliance with the License.
+     You may obtain a copy of the License at
+
+         http://www.apache.org/licenses/LICENSE-2.0
+
+     Unless required by applicable law or agreed to in writing, software
+     distributed under the License is distributed on an "AS IS" BASIS,
+     WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+     See the License for the specific language governing permissions and
+     limitations under the License.
+-->
+<resources>
+    <color name="shortcut_background">#F5F5F5</color>
+</resources>

twa/app/src/main/res/xml/filepaths.xml

@@ -0,0 +1,18 @@
+<!--
+    Copyright 2019 Google Inc. All Rights Reserved.
+
+     Licensed under the Apache License, Version 2.0 (the "License");
+     you may not use this file except in compliance with the License.
+     You may obtain a copy of the License at
+
+         http://www.apache.org/licenses/LICENSE-2.0
+
+     Unless required by applicable law or agreed to in writing, software
+     distributed under the License is distributed on an "AS IS" BASIS,
+     WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+     See the License for the specific language governing permissions and
+     limitations under the License.
+-->
+<paths>
+    <files-path path="twa_splash/" name="twa_splash" />
+</paths>

twa/app/src/main/res/xml/shortcuts.xml

@@ -0,0 +1 @@
+<shortcuts xmlns:android='http://schemas.android.com/apk/res/android' />

twa/build.gradle

@@ -0,0 +1,42 @@
+/*
+ * Copyright 2019 Google Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+// Top-level build file where you can add configuration options common to all sub-projects/modules.
+
+buildscript {
+
+    repositories {
+        google()
+        jcenter()
+    }
+    dependencies {
+        classpath 'com.android.tools.build:gradle:4.0.0'
+
+        // NOTE: Do not place your application dependencies here; they belong
+        // in the individual module build.gradle files
+    }
+}
+
+allprojects {
+    repositories {
+        google()
+        jcenter()
+    }
+}
+
+task clean(type: Delete) {
+    delete rootProject.buildDir
+}

twa/gradle.properties

@@ -0,0 +1,14 @@
+# Project-wide Gradle settings.
+# IDE (e.g. Android Studio) users:
+# Gradle settings configured through the IDE *will override*
+# any settings specified in this file.
+# For more details on how to configure your build environment visit
+# 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.
+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
+# http://www.gradle.org/docs/current/userguide/multi_project_builds.html#sec:decoupled_projects
+# org.gradle.parallel=true
+android.useAndroidX=true

twa/gradle/wrapper/gradle-wrapper.properties

@@ -0,0 +1,5 @@
+distributionBase=GRADLE_USER_HOME
+distributionPath=wrapper/dists
+zipStoreBase=GRADLE_USER_HOME
+zipStorePath=wrapper/dists
+distributionUrl=https\://services.gradle.org/distributions/gradle-6.1.1-bin.zip

twa/gradlew

@@ -0,0 +1,188 @@
+#!/usr/bin/env sh
+
+#
+# Copyright 2015 the original author or authors.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      https://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+
+##############################################################################
+##
+##  Gradle start up script for UN*X
+##
+##############################################################################
+
+# Attempt to set APP_HOME
+# Resolve links: $0 may be a link
+PRG="$0"
+# Need this for relative symlinks.
+while [ -h "$PRG" ] ; do
+    ls=`ls -ld "$PRG"`
+    link=`expr "$ls" : '.*-> \(.*\)$'`
+    if expr "$link" : '/.*' > /dev/null; then
+        PRG="$link"
+    else
+        PRG=`dirname "$PRG"`"/$link"
+    fi
+done
+SAVED="`pwd`"
+cd "`dirname \"$PRG\"`/" >/dev/null
+APP_HOME="`pwd -P`"
+cd "$SAVED" >/dev/null
+
+APP_NAME="Gradle"
+APP_BASE_NAME=`basename "$0"`
+
+# Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
+DEFAULT_JVM_OPTS='"-Xmx64m" "-Xms64m"'
+
+# Use the maximum available, or set MAX_FD != -1 to use that value.
+MAX_FD="maximum"
+
+warn () {
+    echo "$*"
+}
+
+die () {
+    echo
+    echo "$*"
+    echo
+    exit 1
+}
+
+# OS specific support (must be 'true' or 'false').
+cygwin=false
+msys=false
+darwin=false
+nonstop=false
+case "`uname`" in
+  CYGWIN* )
+    cygwin=true
+    ;;
+  Darwin* )
+    darwin=true
+    ;;
+  MINGW* )
+    msys=true
+    ;;
+  NONSTOP* )
+    nonstop=true
+    ;;
+esac
+
+CLASSPATH=$APP_HOME/gradle/wrapper/gradle-wrapper.jar
+
+# Determine the Java command to use to start the JVM.
+if [ -n "$JAVA_HOME" ] ; then
+    if [ -x "$JAVA_HOME/jre/sh/java" ] ; then
+        # IBM's JDK on AIX uses strange locations for the executables
+        JAVACMD="$JAVA_HOME/jre/sh/java"
+    else
+        JAVACMD="$JAVA_HOME/bin/java"
+    fi
+    if [ ! -x "$JAVACMD" ] ; then
+        die "ERROR: JAVA_HOME is set to an invalid directory: $JAVA_HOME
+
+Please set the JAVA_HOME variable in your environment to match the
+location of your Java installation."
+    fi
+else
+    JAVACMD="java"
+    which java >/dev/null 2>&1 || die "ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
+
+Please set the JAVA_HOME variable in your environment to match the
+location of your Java installation."
+fi
+
+# Increase the maximum file descriptors if we can.
+if [ "$cygwin" = "false" -a "$darwin" = "false" -a "$nonstop" = "false" ] ; then
+    MAX_FD_LIMIT=`ulimit -H -n`
+    if [ $? -eq 0 ] ; then
+        if [ "$MAX_FD" = "maximum" -o "$MAX_FD" = "max" ] ; then
+            MAX_FD="$MAX_FD_LIMIT"
+        fi
+        ulimit -n $MAX_FD
+        if [ $? -ne 0 ] ; then
+            warn "Could not set maximum file descriptor limit: $MAX_FD"
+        fi
+    else
+        warn "Could not query maximum file descriptor limit: $MAX_FD_LIMIT"
+    fi
+fi
+
+# For Darwin, add options to specify how the application appears in the dock
+if $darwin; then
+    GRADLE_OPTS="$GRADLE_OPTS \"-Xdock:name=$APP_NAME\" \"-Xdock:icon=$APP_HOME/media/gradle.icns\""
+fi
+
+# For Cygwin or MSYS, switch paths to Windows format before running java
+if [ "$cygwin" = "true" -o "$msys" = "true" ] ; then
+    APP_HOME=`cygpath --path --mixed "$APP_HOME"`
+    CLASSPATH=`cygpath --path --mixed "$CLASSPATH"`
+    JAVACMD=`cygpath --unix "$JAVACMD"`
+
+    # We build the pattern for arguments to be converted via cygpath
+    ROOTDIRSRAW=`find -L / -maxdepth 1 -mindepth 1 -type d 2>/dev/null`
+    SEP=""
+    for dir in $ROOTDIRSRAW ; do
+        ROOTDIRS="$ROOTDIRS$SEP$dir"
+        SEP="|"
+    done
+    OURCYGPATTERN="(^($ROOTDIRS))"
+    # Add a user-defined pattern to the cygpath arguments
+    if [ "$GRADLE_CYGPATTERN" != "" ] ; then
+        OURCYGPATTERN="$OURCYGPATTERN|($GRADLE_CYGPATTERN)"
+    fi
+    # Now convert the arguments - kludge to limit ourselves to /bin/sh
+    i=0
+    for arg in "$@" ; do
+        CHECK=`echo "$arg"|egrep -c "$OURCYGPATTERN" -`
+        CHECK2=`echo "$arg"|egrep -c "^-"`                                 ### Determine if an option
+
+        if [ $CHECK -ne 0 ] && [ $CHECK2 -eq 0 ] ; then                    ### Added a condition
+            eval `echo args$i`=`cygpath --path --ignore --mixed "$arg"`
+        else
+            eval `echo args$i`="\"$arg\""
+        fi
+        i=$((i+1))
+    done
+    case $i in
+        (0) set -- ;;
+        (1) set -- "$args0" ;;
+        (2) set -- "$args0" "$args1" ;;
+        (3) set -- "$args0" "$args1" "$args2" ;;
+        (4) set -- "$args0" "$args1" "$args2" "$args3" ;;
+        (5) set -- "$args0" "$args1" "$args2" "$args3" "$args4" ;;
+        (6) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" ;;
+        (7) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" ;;
+        (8) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" "$args7" ;;
+        (9) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" "$args7" "$args8" ;;
+    esac
+fi
+
+# Escape application args
+save () {
+    for i do printf %s\\n "$i" | sed "s/'/'\\\\''/g;1s/^/'/;\$s/\$/' \\\\/" ; done
+    echo " "
+}
+APP_ARGS=$(save "$@")
+
+# Collect all arguments for the java command, following the shell quoting and substitution rules
+eval set -- $DEFAULT_JVM_OPTS $JAVA_OPTS $GRADLE_OPTS "\"-Dorg.gradle.appname=$APP_BASE_NAME\"" -classpath "\"$CLASSPATH\"" org.gradle.wrapper.GradleWrapperMain "$APP_ARGS"
+
+# by default we should be in the correct project dir, but when run from Finder on Mac, the cwd is wrong
+if [ "$(uname)" = "Darwin" ] && [ "$HOME" = "$PWD" ]; then
+  cd "$(dirname "$0")"
+fi
+
+exec "$JAVACMD" "$@"

twa/gradlew.bat

@@ -0,0 +1,100 @@
+@rem
+@rem Copyright 2015 the original author or authors.
+@rem
+@rem Licensed under the Apache License, Version 2.0 (the "License");
+@rem you may not use this file except in compliance with the License.
+@rem You may obtain a copy of the License at
+@rem
+@rem      https://www.apache.org/licenses/LICENSE-2.0
+@rem
+@rem Unless required by applicable law or agreed to in writing, software
+@rem distributed under the License is distributed on an "AS IS" BASIS,
+@rem WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+@rem See the License for the specific language governing permissions and
+@rem limitations under the License.
+@rem
+
+@if "%DEBUG%" == "" @echo off
+@rem ##########################################################################
+@rem
+@rem  Gradle startup script for Windows
+@rem
+@rem ##########################################################################
+
+@rem Set local scope for the variables with windows NT shell
+if "%OS%"=="Windows_NT" setlocal
+
+set DIRNAME=%~dp0
+if "%DIRNAME%" == "" set DIRNAME=.
+set APP_BASE_NAME=%~n0
+set APP_HOME=%DIRNAME%
+
+@rem Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
+set DEFAULT_JVM_OPTS="-Xmx64m" "-Xms64m"
+
+@rem Find java.exe
+if defined JAVA_HOME goto findJavaFromJavaHome
+
+set JAVA_EXE=java.exe
+%JAVA_EXE% -version >NUL 2>&1
+if "%ERRORLEVEL%" == "0" goto init
+
+echo.
+echo ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
+echo.
+echo Please set the JAVA_HOME variable in your environment to match the
+echo location of your Java installation.
+
+goto fail
+
+:findJavaFromJavaHome
+set JAVA_HOME=%JAVA_HOME:"=%
+set JAVA_EXE=%JAVA_HOME%/bin/java.exe
+
+if exist "%JAVA_EXE%" goto init
+
+echo.
+echo ERROR: JAVA_HOME is set to an invalid directory: %JAVA_HOME%
+echo.
+echo Please set the JAVA_HOME variable in your environment to match the
+echo location of your Java installation.
+
+goto fail
+
+:init
+@rem Get command-line arguments, handling Windows variants
+
+if not "%OS%" == "Windows_NT" goto win9xME_args
+
+:win9xME_args
+@rem Slurp the command line arguments.
+set CMD_LINE_ARGS=
+set _SKIP=2
+
+:win9xME_args_slurp
+if "x%~1" == "x" goto execute
+
+set CMD_LINE_ARGS=%*
+
+:execute
+@rem Setup the command line
+
+set CLASSPATH=%APP_HOME%\gradle\wrapper\gradle-wrapper.jar
+
+@rem Execute Gradle
+"%JAVA_EXE%" %DEFAULT_JVM_OPTS% %JAVA_OPTS% %GRADLE_OPTS% "-Dorg.gradle.appname=%APP_BASE_NAME%" -classpath "%CLASSPATH%" org.gradle.wrapper.GradleWrapperMain %CMD_LINE_ARGS%
+
+:end
+@rem End local scope for the variables with windows NT shell
+if "%ERRORLEVEL%"=="0" goto mainEnd
+
+:fail
+rem Set variable GRADLE_EXIT_CONSOLE if you need the _script_ return code instead of
+rem the _cmd.exe /c_ return code!
+if  not "" == "%GRADLE_EXIT_CONSOLE%" exit 1
+exit /b 1
+
+:mainEnd
+if "%OS%"=="Windows_NT" endlocal
+
+:omega

twa/settings.gradle

@@ -0,0 +1 @@
+include ':app'