chunk 2: remaining non-audio non-NewImport assets

Assets/GooglePlayPlugins/com.google.android.appbundle/Editor/Scripts/AndroidAppBundle.cs

@@ -0,0 +1,103 @@
+// Copyright 2019 Google LLC
+//
+// 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.
+
+using System;
+using System.Text.RegularExpressions;
+using Google.Android.AppBundle.Editor.Internal.Utils;
+using UnityEditor;
+
+namespace Google.Android.AppBundle.Editor
+{
+    /// <summary>
+    /// Provides utilities related to
+    /// <a href="https://developer.android.com/platform/technology/app-bundle/">Android App Bundle</a>.
+    /// </summary>
+    public static class AndroidAppBundle
+    {
+        /// <summary>
+        /// Reserved name for the base module that contains the Unity game engine.
+        /// </summary>
+        public const string BaseModuleName = "base";
+
+        /// <summary>
+        /// Reserved name for the module that separates the base module's assets into an install-time asset pack.
+        /// </summary>
+        public const string BaseAssetsModuleName = "base_assets";
+
+        /// <summary>
+        /// Regex used to determine whether a module name is valid.
+        /// See https://github.com/google/bundletool/blob/master/src/main/java/com/android/tools/build/bundletool/model/BundleModuleName.java#L38
+        /// </summary>
+        private static readonly Regex NameRegex = RegexHelper.CreateCompiled(@"^[a-zA-Z][a-zA-Z0-9_]*$");
+
+        /// <summary>
+        /// Returns true if the specified name is a valid Android App Bundle module name, false otherwise.
+        /// Certain names like "base" are reserved, so also return false in those cases.
+        /// </summary>
+        public static bool IsValidModuleName(string name)
+        {
+            // TODO(b/131241163): enforce a name length limit if we make it much smaller than 65535.
+            return name != null
+                   && NameRegex.IsMatch(name)
+                   && CheckReservedName(name, BaseModuleName)
+                   && CheckReservedName(name, BaseAssetsModuleName);
+        }
+
+        /// <summary>
+        /// Always returns true. Previously indicated if this version of the Unity Editor has native support for
+        /// building an Android App Bundle.
+        /// </summary>
+        // TODO(b/189958664): Needed for 1.x API compatibility. Should be removed with 2.x.
+        [Obsolete("This is always true")]
+        public static bool HasNativeBuildSupport()
+        {
+            return true;
+        }
+
+        /// <summary>
+        /// Returns EditorUserBuildSettings.buildAppBundle if it is defined and false otherwise.
+        /// </summary>
+        // TODO(b/189958664): Needed for 1.x API compatibility. Should be removed with 2.x.
+        [Obsolete("Use EditorUserBuildSettings.buildAppBundle directly instead")]
+        public static bool IsNativeBuildEnabled()
+        {
+            return EditorUserBuildSettings.buildAppBundle;
+        }
+
+        /// <summary>
+        /// Enable the EditorUserBuildSettings.buildAppBundle field if it is defined.
+        /// </summary>
+        // TODO(b/189958664): Needed for 1.x API compatibility. Should be removed with 2.x.
+        [Obsolete("Use EditorUserBuildSettings.buildAppBundle directly instead")]
+        public static void EnableNativeBuild()
+        {
+            EditorUserBuildSettings.buildAppBundle = true;
+        }
+
+        /// <summary>
+        /// Disable the EditorUserBuildSettings.buildAppBundle field if it is defined.
+        /// </summary>
+        // TODO(b/189958664): Needed for 1.x API compatibility. Should be removed with 2.x.
+        [Obsolete("Use EditorUserBuildSettings.buildAppBundle directly instead")]
+        public static void DisableNativeBuild()
+        {
+            EditorUserBuildSettings.buildAppBundle = false;
+        }
+
+        private static bool CheckReservedName(string name, string reserved)
+        {
+            return !name.Equals(reserved, StringComparison.OrdinalIgnoreCase);
+        }
+    }
+}

Assets/GooglePlayPlugins/com.google.android.appbundle/Editor/Scripts/AndroidAppBundle.cs.meta

@@ -0,0 +1,12 @@
+fileFormatVersion: 2
+guid: f6f956b5a57f949f8bbdc5c0bdd5fc6e
+timeCreated: 1550109878
+licenseType: Pro
+MonoImporter:
+  serializedVersion: 2
+  defaultReferences: []
+  executionOrder: 0
+  icon: {instanceID: 0}
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: 

Assets/GooglePlayPlugins/com.google.android.appbundle/Editor/Scripts/AndroidBuildException.cs

@@ -0,0 +1,44 @@
+// Copyright 2021 Google LLC
+//
+// 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.
+
+#if UNITY_2018_4_OR_NEWER && !NET_LEGACY
+using System;
+
+namespace Google.Android.AppBundle.Editor
+{
+    /// <summary>
+    /// Exception thrown in case of certain Android build failures.
+    /// </summary>
+    public class AndroidBuildException : Exception
+    {
+        internal AndroidBuildException(string errorMessage, AndroidBuildReport androidBuildReport) : base(errorMessage)
+        {
+            AndroidBuildReport = androidBuildReport;
+        }
+
+        internal AndroidBuildException(Exception exception, AndroidBuildReport androidBuildReport)
+            : base(exception.Message, exception)
+        {
+            AndroidBuildReport = androidBuildReport;
+        }
+
+        /// <summary>
+        /// An <see cref="AndroidBuildReport"/> associated with this build failure. Note that the build may fail
+        /// after the Android Player is built but before the AAB is ready; in this case the BuildReport will
+        /// likely indicate a BuildResult of Succeeded since it's reporting the result of calling BuildPlayer().
+        /// </summary>
+        public AndroidBuildReport AndroidBuildReport { get; }
+    }
+}
+#endif

Assets/GooglePlayPlugins/com.google.android.appbundle/Editor/Scripts/AndroidBuildException.cs.meta

@@ -0,0 +1,3 @@
+fileFormatVersion: 2
+guid: 50f90eb905884a578d699e13668b1692
+timeCreated: 1618864941

Assets/GooglePlayPlugins/com.google.android.appbundle/Editor/Scripts/AndroidBuildHelper.cs

@@ -0,0 +1,117 @@
+// Copyright 2018 Google LLC
+//
+// 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.
+
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using Google.Android.AppBundle.Editor.Internal.Config;
+using UnityEditor;
+
+namespace Google.Android.AppBundle.Editor
+{
+    /// <summary>
+    /// Provides helper methods for accessing or persisting build-related settings.
+    /// </summary>
+    public static class AndroidBuildHelper
+    {
+        // Allowed characters for splitting PlayerSettings.GetScriptingDefineSymbolsForGroup().
+        private static readonly char[] ScriptingDefineSymbolsSplitChars = {';', ',', ' '};
+
+        /// <summary>
+        /// Returns an array of enabled scenes from the "Scenes In Build" section of Unity's Build Settings window.
+        /// </summary>
+        public static string[] GetEditorBuildEnabledScenes()
+        {
+            return EditorBuildSettings.scenes
+                .Where(scene => scene.enabled && !string.IsNullOrEmpty(scene.path))
+                .Select(scene => scene.path)
+                .ToArray();
+        }
+
+        /// <summary>
+        /// Creates a <see cref="BuildPlayerOptions"/> for the specified output file path with all other fields set to
+        /// reasonable default values.
+        /// </summary>
+        /// <param name="locationPathName">
+        /// The output file that will be created when building a player with <see cref="BuildPipeline"/>.
+        /// </param>
+        /// <returns>A new <see cref="BuildPlayerOptions"/> object.</returns>
+        public static BuildPlayerOptions CreateBuildPlayerOptions(string locationPathName)
+        {
+            return new BuildPlayerOptions
+            {
+                assetBundleManifestPath = AndroidBuildConfiguration.AssetBundleManifestPath,
+                locationPathName = locationPathName,
+                options = EditorUserBuildSettings.development ? BuildOptions.Development : BuildOptions.None,
+                scenes = GetEditorBuildEnabledScenes(),
+                target = BuildTarget.Android,
+                targetGroup = BuildTargetGroup.Android
+            };
+        }
+
+        /// <summary>
+        /// Adds the specified scripting define symbol for Android, but only if it isn't already defined.
+        /// </summary>
+        public static void AddScriptingDefineSymbol(string symbol)
+        {
+            var scriptingDefineSymbols = GetScriptingDefineSymbols();
+            if (!IsScriptingSymbolDefined(scriptingDefineSymbols, symbol))
+            {
+                SetScriptingDefineSymbols(scriptingDefineSymbols.Concat(new[] {symbol}));
+            }
+        }
+
+        /// <summary>
+        /// Removes the specified scripting define symbol if it exists.
+        /// </summary>
+        public static void RemoveScriptingDefineSymbol(string symbol)
+        {
+            var scriptingDefineSymbols = GetScriptingDefineSymbols();
+            if (IsScriptingSymbolDefined(scriptingDefineSymbols, symbol))
+            {
+                SetScriptingDefineSymbols(scriptingDefineSymbols.Where(sym => sym != symbol));
+            }
+        }
+
+        /// <summary>
+        /// Returns true if the specified scripting symbol is defined for Android.
+        /// </summary>
+        public static bool IsScriptingSymbolDefined(string symbol)
+        {
+            return IsScriptingSymbolDefined(GetScriptingDefineSymbols(), symbol);
+        }
+
+        private static bool IsScriptingSymbolDefined(string[] scriptingDefineSymbols, string symbol)
+        {
+            return Array.IndexOf(scriptingDefineSymbols, symbol) >= 0;
+        }
+
+        private static string[] GetScriptingDefineSymbols()
+        {
+            var symbols = PlayerSettings.GetScriptingDefineSymbolsForGroup(BuildTargetGroup.Android);
+            if (string.IsNullOrEmpty(symbols))
+            {
+                return new string[0];
+            }
+
+            return symbols.Split(ScriptingDefineSymbolsSplitChars, StringSplitOptions.RemoveEmptyEntries);
+        }
+
+        private static void SetScriptingDefineSymbols(IEnumerable<string> scriptingDefineSymbols)
+        {
+            var symbols = string.Join(";", scriptingDefineSymbols.ToArray());
+            PlayerSettings.SetScriptingDefineSymbolsForGroup(BuildTargetGroup.Android, symbols);
+        }
+    }
+}

Assets/GooglePlayPlugins/com.google.android.appbundle/Editor/Scripts/AndroidBuildHelper.cs.meta

@@ -0,0 +1,12 @@
+fileFormatVersion: 2
+guid: 35354282707b045b5b530c421d5a234e
+timeCreated: 1582318631
+licenseType: Pro
+MonoImporter:
+  serializedVersion: 2
+  defaultReferences: []
+  executionOrder: 0
+  icon: {instanceID: 0}
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: 

Assets/GooglePlayPlugins/com.google.android.appbundle/Editor/Scripts/AndroidBuildOptions.cs

@@ -0,0 +1,68 @@
+// Copyright 2021 Google LLC
+//
+// 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.
+
+using System;
+using UnityEditor;
+
+namespace Google.Android.AppBundle.Editor
+{
+    /// <summary>
+    /// Options that configure the behavior of an Android build.
+    /// </summary>
+    public class AndroidBuildOptions
+    {
+        /// <summary>
+        /// Constructor.
+        /// </summary>
+        /// <param name="buildPlayerOptions">BuildPlayerOptions required for any build.</param>
+        /// <exception cref="ArgumentException">Thrown if the BuildPlayerOptions build target isn't Android.</exception>
+        public AndroidBuildOptions(BuildPlayerOptions buildPlayerOptions)
+        {
+            if (buildPlayerOptions.target != BuildTarget.Android)
+            {
+                throw new ArgumentException("Unexpected non-Android BuildTarget: " + buildPlayerOptions.target);
+            }
+
+            if (buildPlayerOptions.targetGroup != BuildTargetGroup.Android)
+            {
+                throw new ArgumentException(
+                    "Unexpected non-Android BuildTargetGroup: " + buildPlayerOptions.targetGroup);
+            }
+
+            BuildPlayerOptions = buildPlayerOptions;
+            CompressionOptions = new CompressionOptions();
+        }
+
+        /// <summary>
+        /// The build options passed to BuildPipeline.BuildPlayer(), including scenes and output location.
+        /// </summary>
+        public BuildPlayerOptions BuildPlayerOptions { get; private set; }
+
+        /// <summary>
+        /// Returns the AssetPackConfig to use for the build, or null.
+        /// </summary>
+        public AssetPackConfig AssetPackConfig { get; set; }
+
+        /// <summary>
+        /// Options for overriding the default file compression strategy.
+        /// </summary>
+        public CompressionOptions CompressionOptions { get; set; }
+
+        /// <summary>
+        /// If true, forces the entire build to run on the main thread, potentially freezing the Editor UI during some
+        /// build steps. This setting doesn't affect batch mode builds, which always run on the main thread.
+        /// </summary>
+        public bool ForceSingleThreadedBuild { get; set; }
+    }
+}

Assets/GooglePlayPlugins/com.google.android.appbundle/Editor/Scripts/AndroidBuildOptions.cs.meta

@@ -0,0 +1,11 @@
+fileFormatVersion: 2
+guid: 90eabf8dd350c48c08d72f67b0082358
+MonoImporter:
+  externalObjects: {}
+  serializedVersion: 2
+  defaultReferences: []
+  executionOrder: 0
+  icon: {instanceID: 0}
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: 

Assets/GooglePlayPlugins/com.google.android.appbundle/Editor/Scripts/AndroidBuildReport.cs

@@ -0,0 +1,44 @@
+// Copyright 2021 Google LLC
+//
+// 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.
+
+#if UNITY_2018_4_OR_NEWER && !NET_LEGACY
+using UnityEditor.Build.Reporting;
+
+namespace Google.Android.AppBundle.Editor
+{
+    // Note: this class exists (versus using BuildReport directly) so that additional build info can be added later.
+    /// <summary>
+    /// Report containing the results of an Android build.
+    /// </summary>
+    public class AndroidBuildReport
+    {
+        /// <summary>
+        /// Constructor.
+        /// </summary>
+        /// <param name="buildReport">A BuildPlayer() BuildReport.</param>
+        internal AndroidBuildReport(BuildReport buildReport)
+        {
+            Report = buildReport;
+        }
+
+        /// <summary>
+        /// The <see cref="BuildReport"/> generated during the creation of the Android Player. Note that since
+        /// additional processing occurs after the Player is built, some information in this report may not be useful.
+        /// For example, the BuildSummary.outputPath will contain an intermediate output file path, not the final
+        /// AAB output file path.
+        /// </summary>
+        public BuildReport Report { get; }
+    }
+}
+#endif

Assets/GooglePlayPlugins/com.google.android.appbundle/Editor/Scripts/AndroidBuildReport.cs.meta

@@ -0,0 +1,3 @@
+fileFormatVersion: 2
+guid: 4d0c6937ea0847ec9a639618b2ae2bb8
+timeCreated: 1617397690

Assets/GooglePlayPlugins/com.google.android.appbundle/Editor/Scripts/AssetBundleBuilder.cs

@@ -0,0 +1,377 @@
+// Copyright 2020 Google LLC
+//
+// 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.
+
+using System;
+using System.Collections.Generic;
+using System.IO;
+using System.Linq;
+using Google.Android.AppBundle.Editor.Internal.AssetPacks;
+using UnityEditor;
+
+namespace Google.Android.AppBundle.Editor
+{
+    /// <summary>
+    /// Provides helper methods for building AssetBundles with various texture compression formats.
+    /// </summary>
+    public static class AssetBundleBuilder
+    {
+        /// <summary>
+        /// Run one or more AssetBundle builds with the specified texture compression formats.
+        /// Notes about the <see cref="outputPath"/> parameter:
+        /// - If a relative path is provided, the file paths in the returned AssetPackConfig will be relative paths.
+        /// - If an absolute path is provided, the file paths in the returned object will be absolute paths.
+        /// - AssetBundle builds for additional texture formats will be created in siblings of this directory. For
+        ///   example, for outputDirectory "a/b/c" and texture format ASTC, there will be a directory "a/b/c#tcf_astc".
+        /// - If allowClearDirectory is false, this directory and any sibling directories must be empty or not exist,
+        ///   otherwise an exception is thrown.
+        /// </summary>
+        /// <param name="outputPath">The output directory for the ETC1 AssetBundles. See other notes above.</param>
+        /// <param name="builds">The main argument to <see cref="BuildPipeline"/>.</param>
+        /// <param name="deliveryMode">A delivery mode to apply to every asset pack in the generated config.</param>
+        /// <param name="additionalTextureFormats">Texture formats to build for in addition to ETC1.</param>
+        /// <param name="assetBundleOptions">Options to pass to <see cref="BuildPipeline"/>.</param>
+        /// <param name="allowClearDirectory">Allows this method to clear the contents of the output directory.</param>
+        /// <returns>An <see cref="AssetPackConfig"/> containing file paths to all generated AssetBundles.</returns>
+        public static AssetPackConfig BuildAssetBundles(
+            string outputPath,
+            AssetBundleBuild[] builds,
+            AssetPackDeliveryMode deliveryMode,
+            IEnumerable<MobileTextureSubtarget> additionalTextureFormats = null,
+            BuildAssetBundleOptions assetBundleOptions = BuildAssetBundleOptions.UncompressedAssetBundle,
+            bool allowClearDirectory = false)
+        {
+            var nameToTextureFormatToPath = BuildAssetBundles(outputPath, builds, assetBundleOptions,
+                MobileTextureSubtarget.ETC, additionalTextureFormats, allowClearDirectory);
+            var assetPackConfig = new AssetPackConfig();
+            foreach (var compressionToPath in nameToTextureFormatToPath.Values)
+            {
+                assetPackConfig.AddAssetBundles(compressionToPath, deliveryMode);
+            }
+
+            return assetPackConfig;
+        }
+
+        /// <summary>
+        /// Run one or more AssetBundle builds with the specified texture compression formats.
+        /// This variant allows for overriding the base format and provides a different return type.
+        /// </summary>
+        /// <param name="outputPath">The output directory for base AssetBundles. See the other method for notes.</param>
+        /// <param name="builds">The main argument to <see cref="BuildPipeline"/>.</param>
+        /// <param name="assetBundleOptions">Options to pass to <see cref="BuildPipeline"/>.</param>
+        /// <param name="baseTextureFormat">The default format. Note: ETC1 is supported by all devices.</param>
+        /// <param name="additionalTextureFormats">Texture formats to generate for in addition to the base.</param>
+        /// <param name="allowClearDirectory">Allows this method to clear the contents of the output directory.</param>
+        /// <returns>A dictionary from AssetBundle name to TextureCompressionFormat to file outputPath.</returns>
+        public static Dictionary<string, Dictionary<TextureCompressionFormat, string>> BuildAssetBundles(
+            string outputPath, AssetBundleBuild[] builds, BuildAssetBundleOptions assetBundleOptions,
+            MobileTextureSubtarget baseTextureFormat, IEnumerable<MobileTextureSubtarget> additionalTextureFormats,
+            bool allowClearDirectory)
+        {
+            if (builds == null || builds.Length == 0)
+            {
+                throw new ArgumentException("AssetBundleBuild parameter cannot be null or empty");
+            }
+
+            foreach (var build in builds)
+            {
+                if (!AndroidAppBundle.IsValidModuleName(build.assetBundleName))
+                {
+                    throw new ArgumentException("Invalid AssetBundle name: " + build.assetBundleName);
+                }
+            }
+
+            if (string.IsNullOrEmpty(outputPath))
+            {
+                throw new ArgumentNullException("outputPath");
+            }
+
+            CheckDirectory(outputPath, allowClearDirectory);
+
+            // Make unique and silently remove the base format, if it was present.
+            var textureSubtargets = new HashSet<MobileTextureSubtarget>(
+                additionalTextureFormats ?? Enumerable.Empty<MobileTextureSubtarget>());
+            textureSubtargets.Remove(baseTextureFormat);
+
+            // Note: GetCompressionFormatSuffix() will throw for unsupported formats.
+            var paths = textureSubtargets.Select(format => outputPath + GetCompressionFormatSuffix(format));
+            foreach (var path in paths)
+            {
+                CheckDirectory(path, allowClearDirectory);
+            }
+
+            // Throws if the base format is invalid.
+            GetCompressionFormat(baseTextureFormat);
+
+            return BuildAssetBundlesInternal(
+                outputPath, builds, assetBundleOptions, baseTextureFormat, textureSubtargets);
+        }
+
+        /// <summary>
+        /// Run one or more AssetBundle builds for the specified device tiers.
+        /// Notes about the <see cref="outputPath"/> parameter:
+        /// - If a relative path is provided, the file paths in the returned AssetPackConfig will be relative paths.
+        /// - If an absolute path is provided, the file paths in the returned object will be absolute paths.
+        /// - AssetBundle builds for device tiers will be created in siblings of this directory. For
+        ///   example, for outputDirectory "a/b/c" and device tier HIGH, there will be a directory "a/b/c#tier_high".
+        /// - If allowClearDirectory is false, this directory and any sibling directories must be empty or not exist,
+        ///   otherwise an exception is thrown.
+        /// </summary>
+        /// <param name="outputPath">The output directory for AssetBundles. See other notes above.</param>
+        /// <param name="deliveryMode">A delivery mode to apply to every asset pack in the generated config.</param>
+        /// <param name="deviceTierToBuilds">A dictionary from Device Tier to asset bundle builds. All device tiers
+        /// should contains the same asset bundle names.</param>
+        /// <param name="defaultDeviceTier">
+        /// Default device tier to be used for standalone APKs. Set to zero if not specified.</param>
+        /// <param name="assetBundleOptions">Options to pass to <see cref="BuildPipeline"/>.</param>
+        /// <param name="allowClearDirectory">Allows this method to clear the contents of the output directory.</param>
+        /// <returns>An <see cref="AssetPackConfig"/> containing file paths to all generated AssetBundles.</returns>
+        public static AssetPackConfig BuildAssetBundlesDeviceTier(
+            string outputPath,
+            AssetPackDeliveryMode deliveryMode,
+            Dictionary<DeviceTier, AssetBundleBuild[]> deviceTierToBuilds,
+            DeviceTier defaultDeviceTier = null,
+            BuildAssetBundleOptions assetBundleOptions = BuildAssetBundleOptions.UncompressedAssetBundle,
+            bool allowClearDirectory = false)
+        {
+            if (defaultDeviceTier == null)
+            {
+                defaultDeviceTier = DeviceTier.From(0);
+            }
+
+            if (!deviceTierToBuilds.Keys.Contains(defaultDeviceTier))
+            {
+                throw new ArgumentException("Default device tier not present in deviceTierToBuilds.");
+            }
+
+            var nameToDeviceTierToPath = BuildAssetBundlesDeviceTier(outputPath, deviceTierToBuilds,
+                assetBundleOptions, allowClearDirectory);
+            var assetPackConfig = new AssetPackConfig();
+            foreach (var deviceTierToPath in nameToDeviceTierToPath.Values)
+            {
+                assetPackConfig.AddAssetBundles(deviceTierToPath, deliveryMode);
+            }
+
+            assetPackConfig.DefaultDeviceTier = defaultDeviceTier;
+            return assetPackConfig;
+        }
+
+        /// <summary>
+        /// Run one or more AssetBundle builds for each device tier.
+        /// </summary>
+        /// <param name="outputPath">The output directory for base AssetBundles. See the other method for notes.</param>
+        /// <param name="deviceTierToBuilds">A dictionary from Device Tier to asset bundle builds. All device tiers
+        /// should contains the same asset bundle names.</param>
+        /// <param name="assetBundleOptions">Options to pass to <see cref="BuildPipeline"/>.</param>
+        /// <param name="allowClearDirectory">Allows this method to clear the contents of the output directory.</param>
+        /// <returns>A dictionary from AssetBundle name to DeviceTier to file outputPath.</returns>
+        public static Dictionary<string, Dictionary<DeviceTier, string>> BuildAssetBundlesDeviceTier(
+            string outputPath, Dictionary<DeviceTier, AssetBundleBuild[]> deviceTierToBuilds,
+            BuildAssetBundleOptions assetBundleOptions,
+            bool allowClearDirectory)
+        {
+            if (deviceTierToBuilds == null || deviceTierToBuilds.Count == 0)
+            {
+                throw new ArgumentException("DeviceTierToBuild parameter cannot be null or empty");
+            }
+
+            if (deviceTierToBuilds.Values.Any(builds => builds == null || builds.Length == 0))
+            {
+                throw new ArgumentException("AssetBundleBuilds value cannot be null or empty");
+            }
+
+            var assetBundleNames = deviceTierToBuilds.Values.First().Select(build => build.assetBundleName).ToList();
+
+            if (deviceTierToBuilds.Values.Any(builds =>
+                    !(builds.Length == assetBundleNames.Count() &&
+                      builds.Select(build => build.assetBundleName).Except(assetBundleNames).ToList().Count == 0)))
+            {
+                throw new ArgumentException("AssetBundleBuild names cannot differ across device tiers.");
+            }
+
+            foreach (var assetBundleName in assetBundleNames)
+            {
+                if (!AndroidAppBundle.IsValidModuleName(assetBundleName))
+                {
+                    throw new ArgumentException("Invalid AssetBundle name: " + assetBundleName);
+                }
+            }
+
+            if (string.IsNullOrEmpty(outputPath))
+            {
+                throw new ArgumentNullException("outputPath");
+            }
+
+            CheckDirectory(outputPath, allowClearDirectory);
+
+            var tiers = new HashSet<DeviceTier>(deviceTierToBuilds.Keys);
+            var paths = tiers.Select(tier => outputPath + DeviceTierTargetingTools.GetTargetingSuffix(tier));
+            foreach (var path in paths)
+            {
+                CheckDirectory(path, allowClearDirectory);
+            }
+
+            return BuildAssetBundlesDeviceTierInternal(
+                outputPath, assetBundleOptions, deviceTierToBuilds, assetBundleNames);
+        }
+
+
+        // The internal method assumes all parameter preconditions have already been checked.
+        private static Dictionary<string, Dictionary<TextureCompressionFormat, string>> BuildAssetBundlesInternal(
+            string outputPath, AssetBundleBuild[] builds, BuildAssetBundleOptions assetBundleOptions,
+            MobileTextureSubtarget baseTextureFormat, IEnumerable<MobileTextureSubtarget> textureSubtargets)
+        {
+            // Use a dictionary to capture the generated AssetBundles' file names.
+            var nameToTextureFormatToPath = builds.ToDictionary(
+                build => build.assetBundleName, _ => new Dictionary<TextureCompressionFormat, string>());
+
+            var originalAndroidBuildSubtarget = EditorUserBuildSettings.androidBuildSubtarget;
+            try
+            {
+                // First build for the additional texture formats.
+                foreach (var textureSubtarget in textureSubtargets)
+                {
+                    // Build AssetBundles in the the base format's directory.
+                    EditorUserBuildSettings.androidBuildSubtarget = textureSubtarget;
+                    BuildAssetBundles(outputPath, builds, assetBundleOptions);
+
+                    // Then move the files to a new directory with the compression format suffix.
+                    var outputPathWithSuffix = outputPath + GetCompressionFormatSuffix(textureSubtarget);
+                    Directory.Move(outputPath, outputPathWithSuffix);
+
+                    var textureCompressionFormat = GetCompressionFormat(textureSubtarget);
+                    UpdateDictionary(nameToTextureFormatToPath, outputPathWithSuffix, textureCompressionFormat);
+                }
+
+                // Then build for the base format.
+                EditorUserBuildSettings.androidBuildSubtarget = baseTextureFormat;
+                BuildAssetBundles(outputPath, builds, assetBundleOptions);
+
+                UpdateDictionary(nameToTextureFormatToPath, outputPath, TextureCompressionFormat.Default);
+                return nameToTextureFormatToPath;
+            }
+            finally
+            {
+                EditorUserBuildSettings.androidBuildSubtarget = originalAndroidBuildSubtarget;
+            }
+        }
+
+        private static Dictionary<string, Dictionary<DeviceTier, string>> BuildAssetBundlesDeviceTierInternal(
+            string outputPath, BuildAssetBundleOptions assetBundleOptions,
+            Dictionary<DeviceTier, AssetBundleBuild[]> deviceTierToBuilds, IEnumerable<string> assetBundleNames)
+        {
+            // Use a dictionary to capture the generated AssetBundles' file names.
+            var nameToDeviceTierToPath = assetBundleNames.ToDictionary(
+                bundleName => bundleName, _ => new Dictionary<DeviceTier, string>());
+            foreach (var deviceTier in deviceTierToBuilds.Keys)
+            {
+                var tierBuilds = deviceTierToBuilds[deviceTier];
+                // Build AssetBundles in the the base format's directory.
+                BuildAssetBundles(outputPath, tierBuilds, assetBundleOptions);
+
+                // Then move the files to a new directory with the device tier suffix.
+                var outputPathWithSuffix = outputPath + DeviceTierTargetingTools.GetTargetingSuffix(deviceTier);
+                Directory.Move(outputPath, outputPathWithSuffix);
+
+                UpdateDictionaryDeviceTier(nameToDeviceTierToPath, outputPathWithSuffix, deviceTier);
+            }
+
+            return nameToDeviceTierToPath;
+        }
+
+        private static void UpdateDictionaryDeviceTier(
+            Dictionary<string, Dictionary<DeviceTier, string>> nameToDeviceTierToPath,
+            string outputPath, DeviceTier deviceTier)
+        {
+            foreach (var entry in nameToDeviceTierToPath)
+            {
+                var filePath = Path.Combine(outputPath, entry.Key);
+                entry.Value[deviceTier] = filePath;
+                if (!File.Exists(filePath))
+                {
+                    throw new InvalidOperationException(string.Format("Missing AssetBundle file: " + filePath));
+                }
+            }
+        }
+
+
+        private static void BuildAssetBundles(
+            string outputPath, AssetBundleBuild[] builds, BuildAssetBundleOptions assetBundleOptions)
+        {
+            // The output directory must exist before calling BuildAssetBundles(), so create it first.
+            Directory.CreateDirectory(outputPath);
+            var assetPackManifest =
+                BuildPipeline.BuildAssetBundles(outputPath, builds, assetBundleOptions, BuildTarget.Android);
+            if (assetPackManifest == null)
+            {
+                throw new InvalidOperationException("Error building AssetBundles");
+            }
+        }
+
+        private static void UpdateDictionary(
+            Dictionary<string, Dictionary<TextureCompressionFormat, string>> nameToTextureFormatToPath,
+            string outputPath, TextureCompressionFormat textureCompressionFormat)
+        {
+            foreach (var entry in nameToTextureFormatToPath)
+            {
+                var filePath = Path.Combine(outputPath, entry.Key);
+                entry.Value[textureCompressionFormat] = filePath;
+                if (!File.Exists(filePath))
+                {
+                    throw new InvalidOperationException(string.Format("Missing AssetBundle file: " + filePath));
+                }
+            }
+        }
+
+        private static string GetCompressionFormatSuffix(MobileTextureSubtarget subtarget)
+        {
+            var format = GetCompressionFormat(subtarget);
+            return TextureTargetingTools.GetTargetingSuffix(format);
+        }
+
+        private static TextureCompressionFormat GetCompressionFormat(MobileTextureSubtarget subtarget)
+        {
+            switch (subtarget)
+            {
+                case MobileTextureSubtarget.ASTC:
+                    return TextureCompressionFormat.Astc;
+                case MobileTextureSubtarget.DXT:
+                    return TextureCompressionFormat.Dxt1;
+                case MobileTextureSubtarget.ETC:
+                    return TextureCompressionFormat.Etc1;
+                case MobileTextureSubtarget.ETC2:
+                    return TextureCompressionFormat.Etc2;
+                case MobileTextureSubtarget.PVRTC:
+                    return TextureCompressionFormat.Pvrtc;
+                default:
+                    throw new ArgumentException("Unsupported MobileTextureSubtarget: " + subtarget);
+            }
+        }
+
+        private static void CheckDirectory(string path, bool allowClearDirectory)
+        {
+            var directoryInfo = new DirectoryInfo(path);
+            if (!directoryInfo.Exists)
+            {
+                return;
+            }
+
+            if (!allowClearDirectory && directoryInfo.GetFileSystemInfos().Any())
+            {
+                throw new ArgumentException("Directory is not empty: " + path);
+            }
+
+            directoryInfo.Delete( /* recursive= */ true);
+        }
+    }
+}

Assets/GooglePlayPlugins/com.google.android.appbundle/Editor/Scripts/AssetBundleBuilder.cs.meta

@@ -0,0 +1,12 @@
+fileFormatVersion: 2
+guid: 6103140ca35a146aebf90b0d5001cf9d
+timeCreated: 1582783480
+licenseType: Pro
+MonoImporter:
+  serializedVersion: 2
+  defaultReferences: []
+  executionOrder: 0
+  icon: {instanceID: 0}
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: 

Assets/GooglePlayPlugins/com.google.android.appbundle/Editor/Scripts/AssetOnlyBuildOptions.cs

@@ -0,0 +1,71 @@
+// Copyright 2021 Google LLC
+//
+// 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.
+
+using System;
+using System.Collections.Generic;
+
+namespace Google.Android.AppBundle.Editor
+{
+    /// <summary>
+    /// Options that configure the behavior of an asset-only app bundle build.
+    /// </summary>
+    public class AssetOnlyBuildOptions
+    {
+        /// <summary>
+        /// Constructor.
+        /// </summary>
+        /// <param name="assetPackConfig">AssetPackConfig specifying which asset packs to include in the build.</param>>
+        /// <exception cref="ArgumentException">Thrown if the AssetPackConfig contains install-time packs.</exception>
+        public AssetOnlyBuildOptions(AssetPackConfig assetPackConfig)
+        {
+            foreach (var keyValue in assetPackConfig.AssetPacks)
+            {
+                var deliveryMode = keyValue.Value.DeliveryMode;
+                if (deliveryMode == AssetPackDeliveryMode.InstallTime)
+                {
+                    throw new ArgumentException(
+                        "AssetPackConfig contains install-time asset packs which are not supported in asset-only app bundles.");
+                }
+            }
+
+            AssetPackConfig = assetPackConfig;
+        }
+
+        /// <summary>
+        /// Returns the AssetPackConfig to use for the build, or null.
+        /// </summary>
+        public AssetPackConfig AssetPackConfig { get; private set; }
+
+        /// <summary>
+        /// The version codes identifying which app versions should be served these asset packs.
+        /// </summary>
+        public IList<long> AppVersions { get; set; }
+
+        /// <summary>
+        /// A string that uniquely identifies this asset-only bundle.
+        /// </summary>
+        public string AssetVersionTag { get; set; }
+
+        /// <summary>
+        /// The path where the asset only bundle will be built. 
+        /// </summary>
+        public string LocationPathName { get; set; }
+
+        /// <summary>
+        /// If true, forces the entire build to run on the main thread, potentially freezing the Editor UI during some
+        /// build steps. This setting doesn't affect batch mode builds, which always run on the main thread.
+        /// </summary>
+        public bool ForceSingleThreadedBuild { get; set; }
+    }
+}

Assets/GooglePlayPlugins/com.google.android.appbundle/Editor/Scripts/AssetOnlyBuildOptions.cs.meta

@@ -0,0 +1,11 @@
+fileFormatVersion: 2
+guid: d1bdcdd916a424a938fe54bd01767156
+MonoImporter:
+  externalObjects: {}
+  serializedVersion: 2
+  defaultReferences: []
+  executionOrder: 0
+  icon: {instanceID: 0}
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: 

Assets/GooglePlayPlugins/com.google.android.appbundle/Editor/Scripts/AssetPack.cs

@@ -0,0 +1,332 @@
+// Copyright 2020 Google LLC
+//
+// 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.
+
+using System;
+using System.Collections.Generic;
+
+namespace Google.Android.AppBundle.Editor
+{
+    /// <summary>
+    /// Contains configuration about an asset pack including its <see cref="AssetPackDeliveryMode"/>
+    /// and the location on disk of the files that should be included in the pack.
+    /// </summary>
+    public class AssetPack
+    {
+        private string _assetBundleFilePath;
+        private string _assetPackDirectoryPath;
+        private Dictionary<TextureCompressionFormat, string> _compressionFormatToAssetBundleFilePath;
+        private Dictionary<TextureCompressionFormat, string> _compressionFormatToAssetPackDirectoryPath;
+        private Dictionary<DeviceTier, string> _deviceTierToAssetBundleFilePath;
+        private Dictionary<DeviceTier, string> _deviceTierToAssetPackDirectoryPath;
+
+
+        /// <summary>
+        /// Indicates how this asset pack will be delivered.
+        /// </summary>
+        public AssetPackDeliveryMode DeliveryMode { get; set; }
+
+        /// <summary>
+        /// Location on disk of a single AssetBundle file. This file can be fetched at runtime using the Play Asset
+        /// Delivery APIs.
+        /// </summary>
+        /// <exception cref="ArgumentException">
+        /// Thrown on set if any other path property is already set (non-null).
+        /// </exception>
+        public string AssetBundleFilePath
+        {
+            get { return _assetBundleFilePath; }
+            set
+            {
+                if (value == null)
+                {
+                    _assetBundleFilePath = null;
+                    return;
+                }
+
+                if (_assetPackDirectoryPath != null)
+                {
+                    throw new ArgumentException("AssetPackDirectoryPath is already set.");
+                }
+
+                if (_compressionFormatToAssetBundleFilePath != null)
+                {
+                    throw new ArgumentException("CompressionFormatToAssetBundleFilePath is already set.");
+                }
+
+                if (_compressionFormatToAssetPackDirectoryPath != null)
+                {
+                    throw new ArgumentException("CompressionFormatToAssetPackDirectoryPath is already set.");
+                }
+
+                if (_deviceTierToAssetBundleFilePath != null)
+                {
+                    throw new ArgumentException("DeviceTierToAssetBundleFilePath is already set.");
+                }
+
+                if (_deviceTierToAssetPackDirectoryPath != null)
+                {
+                    throw new ArgumentException("DeviceTierToAssetPackDirectoryPath is already set.");
+                }
+
+
+                _assetBundleFilePath = value;
+            }
+        }
+
+        /// <summary>
+        /// Location on disk of a folder containing raw asset files.
+        /// </summary>
+        /// <exception cref="ArgumentException">
+        /// Thrown on set if any other path property is already set (non-null).
+        /// </exception>
+        public string AssetPackDirectoryPath
+        {
+            get { return _assetPackDirectoryPath; }
+            set
+            {
+                if (value == null)
+                {
+                    _assetPackDirectoryPath = null;
+                    return;
+                }
+
+                if (_assetBundleFilePath != null)
+                {
+                    throw new ArgumentException("AssetBundleFilePath is already set.");
+                }
+
+                if (_compressionFormatToAssetBundleFilePath != null)
+                {
+                    throw new ArgumentException("CompressionFormatToAssetBundleFilePath is already set.");
+                }
+
+                if (_compressionFormatToAssetPackDirectoryPath != null)
+                {
+                    throw new ArgumentException("CompressionFormatToAssetPackDirectoryPath is already set.");
+                }
+
+                if (_deviceTierToAssetBundleFilePath != null)
+                {
+                    throw new ArgumentException("DeviceTierToAssetBundleFilePath is already set.");
+                }
+
+                if (_deviceTierToAssetPackDirectoryPath != null)
+                {
+                    throw new ArgumentException("DeviceTierToAssetPackDirectoryPath is already set.");
+                }
+
+
+                _assetPackDirectoryPath = value;
+            }
+        }
+
+        /// <summary>
+        /// Dictionary from <see cref="TextureCompressionFormat"/> to the location on disk of a single AssetBundle file.
+        /// The AssetBundles should be identical except for their texture compression format. When using Play
+        /// Asset Delivery APIs, only the AssetBundle for the device's preferred texture compression format will
+        /// be delivered.
+        /// </summary>
+        /// <exception cref="ArgumentException">
+        /// Thrown on set if any other path property is already set (non-null).
+        /// </exception>
+        public Dictionary<TextureCompressionFormat, string> CompressionFormatToAssetBundleFilePath
+        {
+            get { return _compressionFormatToAssetBundleFilePath; }
+            set
+            {
+                if (value == null)
+                {
+                    _compressionFormatToAssetBundleFilePath = null;
+                    return;
+                }
+
+                if (_assetBundleFilePath != null)
+                {
+                    throw new ArgumentException("AssetBundleFilePath is already set.");
+                }
+
+                if (_assetPackDirectoryPath != null)
+                {
+                    throw new ArgumentException("AssetPackDirectoryPath is already set.");
+                }
+
+                if (_compressionFormatToAssetPackDirectoryPath != null)
+                {
+                    throw new ArgumentException("CompressionFormatToAssetPackDirectoryPath is already set.");
+                }
+
+                if (_deviceTierToAssetBundleFilePath != null)
+                {
+                    throw new ArgumentException("DeviceTierToAssetBundleFilePath is already set.");
+                }
+
+                if (_deviceTierToAssetPackDirectoryPath != null)
+                {
+                    throw new ArgumentException("DeviceTierToAssetPackDirectoryPath is already set.");
+                }
+
+
+                _compressionFormatToAssetBundleFilePath = value;
+            }
+        }
+
+        /// <summary>
+        /// Dictionary from <see cref="TextureCompressionFormat"/> to the location on disk of a folder containing
+        /// raw asset files.
+        /// When using Play Asset Delivery APIs, only the folder for the device's preferred texture compression format
+        /// will be delivered.
+        /// </summary>
+        /// <exception cref="ArgumentException">
+        /// Thrown on set if any other path property is already set (non-null).
+        /// </exception>
+        public Dictionary<TextureCompressionFormat, string> CompressionFormatToAssetPackDirectoryPath
+        {
+            get { return _compressionFormatToAssetPackDirectoryPath; }
+            set
+            {
+                if (value == null)
+                {
+                    _compressionFormatToAssetPackDirectoryPath = null;
+                    return;
+                }
+
+                if (_assetBundleFilePath != null)
+                {
+                    throw new ArgumentException("AssetBundleFilePath is already set.");
+                }
+
+                if (_assetPackDirectoryPath != null)
+                {
+                    throw new ArgumentException("AssetPackDirectoryPath is already set.");
+                }
+
+                if (_compressionFormatToAssetBundleFilePath != null)
+                {
+                    throw new ArgumentException("CompressionFormatToAssetBundleFilePath is already set.");
+                }
+
+                if (_deviceTierToAssetBundleFilePath != null)
+                {
+                    throw new ArgumentException("DeviceTierToAssetBundleFilePath is already set.");
+                }
+
+                if (_deviceTierToAssetPackDirectoryPath != null)
+                {
+                    throw new ArgumentException("DeviceTierToAssetPackDirectoryPath is already set.");
+                }
+
+
+                _compressionFormatToAssetPackDirectoryPath = value;
+            }
+        }
+
+        /// <summary>
+        /// Dictionary from <see cref="DeviceTier"/> to the location on disk of a single AssetBundle file.
+        /// When using Play Asset Delivery APIs, only the AssetBundle for the device's tier will be delivered.
+        /// </summary>
+        /// <exception cref="ArgumentException">
+        /// Thrown on set if any other path property is already set (non-null).
+        /// </exception>
+        public Dictionary<DeviceTier, string> DeviceTierToAssetBundleFilePath
+        {
+            get { return _deviceTierToAssetBundleFilePath; }
+            set
+            {
+                if (value == null)
+                {
+                    _deviceTierToAssetBundleFilePath = null;
+                    return;
+                }
+
+                if (_assetBundleFilePath != null)
+                {
+                    throw new ArgumentException("AssetBundleFilePath is already set.");
+                }
+
+                if (_assetPackDirectoryPath != null)
+                {
+                    throw new ArgumentException("AssetPackDirectoryPath is already set.");
+                }
+
+                if (_compressionFormatToAssetBundleFilePath != null)
+                {
+                    throw new ArgumentException("CompressionFormatToAssetBundleFilePath is already set.");
+                }
+
+                if (_compressionFormatToAssetPackDirectoryPath != null)
+                {
+                    throw new ArgumentException("CompressionFormatToAssetPackDirectoryPath is already set.");
+                }
+
+
+                if (_deviceTierToAssetPackDirectoryPath != null)
+                {
+                    throw new ArgumentException("DeviceTierToAssetPackDirectoryPath is already set.");
+                }
+
+                _deviceTierToAssetBundleFilePath = value;
+            }
+        }
+
+        /// <summary>
+        /// Dictionary from <see cref="DeviceTier"/> to the location on disk of a folder containing
+        /// raw asset files.
+        /// When using Play Asset Delivery APIs, only the folder for the device's tier will be delivered.
+        /// </summary>
+        /// <exception cref="ArgumentException">
+        /// Thrown on set if any other path property is already set (non-null).
+        /// </exception>
+        public Dictionary<DeviceTier, string> DeviceTierToAssetPackDirectoryPath
+        {
+            get { return _deviceTierToAssetPackDirectoryPath; }
+            set
+            {
+                if (value == null)
+                {
+                    _deviceTierToAssetPackDirectoryPath = null;
+                    return;
+                }
+
+                if (_assetBundleFilePath != null)
+                {
+                    throw new ArgumentException("AssetBundleFilePath is already set.");
+                }
+
+                if (_assetPackDirectoryPath != null)
+                {
+                    throw new ArgumentException("AssetPackDirectoryPath is already set.");
+                }
+
+                if (_compressionFormatToAssetBundleFilePath != null)
+                {
+                    throw new ArgumentException("CompressionFormatToAssetBundleFilePath is already set.");
+                }
+
+                if (_compressionFormatToAssetPackDirectoryPath != null)
+                {
+                    throw new ArgumentException("CompressionFormatToAssetPackDirectoryPath is already set.");
+                }
+
+
+                if (_deviceTierToAssetBundleFilePath != null)
+                {
+                    throw new ArgumentException("DeviceTierToAssetBundleFilePath is already set.");
+                }
+
+                _deviceTierToAssetPackDirectoryPath = value;
+            }
+        }
+
+    }
+}

Assets/GooglePlayPlugins/com.google.android.appbundle/Editor/Scripts/AssetPack.cs.meta

@@ -0,0 +1,12 @@
+fileFormatVersion: 2
+guid: 8b308e30f8f2a419fa2d96ce08ab2697
+timeCreated: 1583258649
+licenseType: Pro
+MonoImporter:
+  serializedVersion: 2
+  defaultReferences: []
+  executionOrder: 0
+  icon: {instanceID: 0}
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: 

Assets/GooglePlayPlugins/com.google.android.appbundle/Editor/Scripts/AssetPackConfig.cs

@@ -0,0 +1,276 @@
+// Copyright 2020 Google LLC
+//
+// 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.
+
+using System;
+using System.Collections.Generic;
+using System.IO;
+using System.Linq;
+
+namespace Google.Android.AppBundle.Editor
+{
+    /// <summary>
+    /// Configuration for all asset packs that will be packaged in an Android App Bundle (AAB).
+    /// </summary>
+    public class AssetPackConfig
+    {
+        /// <summary>
+        /// Indicates that the assets in an AAB's base module should be split into a separate install-time asset
+        /// pack. Usually when building a game, some assets are stored in the base module's "assets" directory.
+        /// Games that run into APK size limits may have previously used the "Split Application Binary"
+        /// option to create APK Expansion (*.obb) files, however this is unsupported with AABs.
+        /// If Play Console indicates that the base module exceeds a download size limit, for example 150 MB,
+        /// enabling this option may resolve the issue. See https://developer.android.com/guide/app-bundle.
+        /// </summary>
+        public bool SplitBaseModuleAssets;
+
+        /// <summary>
+        /// Dictionary from asset pack name to <see cref="AssetPack"/> object containing info such as delivery mode.
+        /// Note: asset pack names must start with a letter and can contain only letters, numbers, and underscores.
+        /// Note: convenience methods such as <see cref="AddAssetBundle"/> are recommended to more safely add new
+        /// Asset packs, but this dictionary is available for direct modification for advanced use cases.
+        /// </summary>
+        public readonly Dictionary<string, AssetPack> AssetPacks = new Dictionary<string, AssetPack>();
+
+        /// <summary>
+        /// A dictionary containing the subset of <see cref="AssetPacks"/> that are marked for delivery.
+        /// Note: the returned Dictionary doesn't indicate whether <see cref="SplitBaseModuleAssets"/> is enabled.
+        /// </summary>
+        public Dictionary<string, AssetPack> DeliveredAssetPacks
+        {
+            get
+            {
+                return AssetPacks
+                    .Where(pair => pair.Value.DeliveryMode != AssetPackDeliveryMode.DoNotPackage)
+                    .ToDictionary(pair => pair.Key, pair => pair.Value);
+            }
+        }
+
+        /// <summary>
+        /// When asset packs for multiple texture compression formats are present, this specifies the format used
+        /// when building standalone APKs for Android pre-Lollipop devices.
+        /// </summary>
+        public TextureCompressionFormat DefaultTextureCompressionFormat = TextureCompressionFormat.Default;
+
+        /// <summary>
+        /// When asset packs for multiple device tiers are present, this specifies the tier used
+        /// when building standalone APKs for Android pre-Lollipop devices.
+        /// </summary>
+        public DeviceTier DefaultDeviceTier = 0;
+
+
+        /// <summary>
+        /// Returns true if this configuration includes at least 1 asset pack that may be packaged in an AAB.
+        /// Return true if <see cref="SplitBaseModuleAssets"/> is enabled, even if there are no other asset packs.
+        /// </summary>
+        public bool HasDeliveredAssetPacks()
+        {
+            return SplitBaseModuleAssets || DeliveredAssetPacks.Any();
+        }
+
+        /// <summary>
+        /// Package the specified AssetBundle file in its own <see cref="AssetPack"/> with the specified delivery mode.
+        /// The name of the created asset pack will match that of the specified AssetBundle file.
+        /// </summary>
+        /// <param name="assetBundleFilePath">The path to a single AssetBundle file.</param>
+        /// <param name="deliveryMode">The <see cref="AssetPackDeliveryMode"/> for the asset pack.</param>
+        /// <exception cref="ArgumentException">If the asset pack name is invalid.</exception>
+        /// <exception cref="FileNotFoundException">If the AssetBundle file doesn't exist.</exception>
+        public void AddAssetBundle(string assetBundleFilePath, AssetPackDeliveryMode deliveryMode)
+        {
+            var assetPackName = GetAssetPackName(assetBundleFilePath);
+            AssetPacks[assetPackName] = new AssetPack
+            {
+                DeliveryMode = deliveryMode,
+                AssetBundleFilePath = assetBundleFilePath
+            };
+        }
+
+        /// <summary>
+        /// Package all raw assets in the specified folder in an <see cref="AssetPack"/> with the specified name and
+        /// using the specified delivery mode.
+        /// </summary>
+        /// <param name="assetPackName">The name of the asset pack.</param>
+        /// <param name="assetsFolderPath">
+        /// The path to a directory whose files will be directly copied into the asset pack during app bundle creation.
+        /// </param>
+        /// <param name="deliveryMode">The <see cref="AssetPackDeliveryMode"/> for the asset pack.</param>
+        /// <exception cref="ArgumentException">If the <see cref="assetPackName"/> is invalid.</exception>
+        /// <exception cref="FileNotFoundException">If the <see cref="assetsFolderPath"/> doesn't exist.</exception>
+        public void AddAssetsFolder(string assetPackName, string assetsFolderPath, AssetPackDeliveryMode deliveryMode)
+        {
+            var directoryInfo = new DirectoryInfo(assetsFolderPath);
+            if (!directoryInfo.Exists)
+            {
+                throw new FileNotFoundException("Asset pack directory doesn't exist", assetsFolderPath);
+            }
+
+            CheckAssetPackName(assetPackName);
+            AssetPacks[assetPackName] = new AssetPack
+            {
+                DeliveryMode = deliveryMode,
+                AssetPackDirectoryPath = assetsFolderPath
+            };
+        }
+
+        /// <summary>
+        /// Package the specified raw assets in the specified folders, keyed by <see cref="TextureCompressionFormat"/>,
+        /// in an <see cref="AssetPack"/> with the specified delivery mode.
+        /// When using Play Asset Delivery APIs, only the folder for the device's preferred texture compression format
+        /// will be delivered.
+        /// </summary>
+        /// <param name="assetPackName">The name of the asset pack.</param>
+        /// <param name="compressionFormatToAssetPackDirectoryPath">
+        /// A dictionary from <see cref="TextureCompressionFormat"/> to the path of directories of files that will be
+        /// directly copied into the asset pack during app bundle creation.</param>
+        /// <param name="deliveryMode">The <see cref="AssetPackDeliveryMode"/> for the asset pack.</param>
+        /// <exception cref="ArgumentException">If the dictionary or asset pack name is invalid.</exception>
+        public void AddAssetsFolders(
+            string assetPackName,
+            IDictionary<TextureCompressionFormat, string> compressionFormatToAssetPackDirectoryPath,
+            AssetPackDeliveryMode deliveryMode)
+        {
+            if (compressionFormatToAssetPackDirectoryPath.Count == 0)
+            {
+                throw new ArgumentException("Dictionary should contain at least one path");
+            }
+
+            if (compressionFormatToAssetPackDirectoryPath.All(kvp => kvp.Key != TextureCompressionFormat.Default))
+            {
+                throw new ArgumentException("Dictionary should contain at least one Default compression path");
+            }
+
+            CheckAssetPackName(assetPackName);
+            AssetPacks[assetPackName] = new AssetPack
+            {
+                DeliveryMode = deliveryMode,
+                CompressionFormatToAssetPackDirectoryPath =
+                    new Dictionary<TextureCompressionFormat, string>(compressionFormatToAssetPackDirectoryPath)
+            };
+        }
+
+        /// <summary>
+        /// Package the specified AssetBundle files, which vary only by <see cref="TextureCompressionFormat"/>, in an
+        /// <see cref="AssetPack"/> with the specified delivery mode.
+        /// When using Play Asset Delivery APIs, only the AssetBundle for the device's preferred texture compression
+        /// format will be delivered.
+        /// </summary>
+        /// <param name="compressionFormatToAssetBundleFilePath">
+        /// A dictionary from <see cref="TextureCompressionFormat"/> to AssetBundle files.</param>
+        /// <param name="deliveryMode">The <see cref="AssetPackDeliveryMode"/> for the asset pack.</param>
+        /// <exception cref="ArgumentException">If the dictionary or asset pack name is invalid.</exception>
+        /// <exception cref="FileNotFoundException">If any AssetBundle file doesn't exist.</exception>
+        public void AddAssetBundles(
+            IDictionary<TextureCompressionFormat, string> compressionFormatToAssetBundleFilePath,
+            AssetPackDeliveryMode deliveryMode)
+        {
+            if (compressionFormatToAssetBundleFilePath.Count == 0)
+            {
+                throw new ArgumentException("Dictionary should contain at least one AssetBundle");
+            }
+
+            if (compressionFormatToAssetBundleFilePath.All(kvp => kvp.Key != TextureCompressionFormat.Default))
+            {
+                throw new ArgumentException("Dictionary should contain at least one Default compression AssetBundle");
+            }
+
+            var assetPackName = GetAssetPackName(compressionFormatToAssetBundleFilePath.Values.First());
+            if (compressionFormatToAssetBundleFilePath.Any(kvp => assetPackName != GetAssetPackName(kvp.Value)))
+            {
+                throw new ArgumentException("All AssetBundles in the Dictionary must have the same name");
+            }
+
+            AssetPacks[assetPackName] = new AssetPack
+            {
+                DeliveryMode = deliveryMode,
+                CompressionFormatToAssetBundleFilePath =
+                    new Dictionary<TextureCompressionFormat, string>(compressionFormatToAssetBundleFilePath)
+            };
+        }
+
+        /// <summary>
+        /// Package the specified raw assets in the specified folders, keyed by <see cref="DeviceTier"/>,
+        /// in an <see cref="AssetPack"/> with the specified delivery mode.
+        /// When using Play Asset Delivery APIs, only the AssetBundle for the device's tier will be delivered.
+        /// </summary>
+        public void AddAssetsFolders(
+            string assetPackName,
+            IDictionary<DeviceTier, string> deviceTierToAssetPackDirectoryPath,
+            AssetPackDeliveryMode deliveryMode)
+        {
+            if (deviceTierToAssetPackDirectoryPath.Count == 0)
+            {
+                throw new ArgumentException("Dictionary should contain at least one path");
+            }
+
+            CheckAssetPackName(assetPackName);
+            AssetPacks[assetPackName] = new AssetPack
+            {
+                DeliveryMode = deliveryMode,
+                DeviceTierToAssetPackDirectoryPath =
+                    new Dictionary<DeviceTier, string>(deviceTierToAssetPackDirectoryPath)
+            };
+        }
+
+        /// <summary>
+        /// Package the specified AssetBundle files, which vary only by <see cref="DeviceTier"/>, in an
+        /// <see cref="AssetPack"/> with the specified delivery mode.
+        /// When using Play Asset Delivery APIs, only the AssetBundle for the device's tier will be delivered.
+        /// </summary>
+        public void AddAssetBundles(
+            IDictionary<DeviceTier, string> deviceTierToAssetBundleFilePath,
+            AssetPackDeliveryMode deliveryMode)
+        {
+            if (deviceTierToAssetBundleFilePath.Count == 0)
+            {
+                throw new ArgumentException("Dictionary should contain at least one AssetBundle");
+                ;
+            }
+
+            var assetPackName = GetAssetPackName(deviceTierToAssetBundleFilePath.Values.First());
+            if (deviceTierToAssetBundleFilePath.Any(kvp => assetPackName != GetAssetPackName(kvp.Value)))
+            {
+                throw new ArgumentException("All AssetBundles in the Dictionary must have the same name");
+            }
+
+            AssetPacks[assetPackName] = new AssetPack
+            {
+                DeliveryMode = deliveryMode,
+                DeviceTierToAssetBundleFilePath =
+                    new Dictionary<DeviceTier, string>(deviceTierToAssetBundleFilePath)
+            };
+        }
+
+
+        private static string GetAssetPackName(string assetBundleFilePath)
+        {
+            var fileInfo = new FileInfo(assetBundleFilePath);
+            if (!fileInfo.Exists)
+            {
+                throw new FileNotFoundException("AssetBundle file doesn't exist", assetBundleFilePath);
+            }
+
+            var assetPackName = fileInfo.Name;
+            CheckAssetPackName(assetPackName);
+            return assetPackName;
+        }
+
+        private static void CheckAssetPackName(string assetPackName)
+        {
+            if (!AndroidAppBundle.IsValidModuleName(assetPackName))
+            {
+                throw new ArgumentException("Invalid asset pack name: " + assetPackName);
+            }
+        }
+    }
+}

Assets/GooglePlayPlugins/com.google.android.appbundle/Editor/Scripts/AssetPackConfig.cs.meta

@@ -0,0 +1,12 @@
+fileFormatVersion: 2
+guid: a0d123655d73c4856b6f7c6790c62082
+timeCreated: 1582764640
+licenseType: Pro
+MonoImporter:
+  serializedVersion: 2
+  defaultReferences: []
+  executionOrder: 0
+  icon: {instanceID: 0}
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: 

Assets/GooglePlayPlugins/com.google.android.appbundle/Editor/Scripts/AssetPackConfigSerializer.cs

@@ -0,0 +1,79 @@
+// Copyright 2020 Google LLC
+//
+// 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.
+
+using System.IO;
+using Google.Android.AppBundle.Editor.Internal.Config;
+using UnityEngine;
+
+namespace Google.Android.AppBundle.Editor.AssetPacks
+{
+    /// <summary>
+    /// Provides methods for serializing <see cref="AssetPackConfig"/> to a JSON file and for deserializing the config.
+    /// </summary>
+    public static class AssetPackConfigSerializer
+    {
+        /// <summary>
+        /// Save the specified <see cref="AssetPackConfig"/> config to disk.
+        /// </summary>
+        public static void SaveConfig(
+            AssetPackConfig assetPackConfig, string configurationFilePath = SerializationHelper.ConfigurationFilePath)
+        {
+            Debug.LogFormat("Saving {0}", configurationFilePath);
+            var config = SerializationHelper.Serialize(assetPackConfig);
+            var jsonText = JsonUtility.ToJson(config);
+            File.WriteAllText(configurationFilePath, jsonText);
+        }
+
+        /// <summary>
+        /// Returns an <see cref="AssetPackConfig"/> loaded from disk.
+        /// </summary>
+        public static AssetPackConfig LoadConfig()
+        {
+            if (!File.Exists(SerializationHelper.ConfigurationFilePath))
+            {
+                Debug.LogFormat("Creating new config {0}", SerializationHelper.ConfigurationFilePath);
+                return new AssetPackConfig();
+            }
+
+            Debug.LogFormat("Loading config {0}", SerializationHelper.ConfigurationFilePath);
+            var jsonText = File.ReadAllText(SerializationHelper.ConfigurationFilePath);
+            var config = JsonUtility.FromJson<SerializableAssetPackConfig>(jsonText);
+            return SerializationHelper.Deserialize(config);
+        }
+
+        /// <summary>
+        /// Returns an <see cref="AssetPackConfig"/> loaded from the specified file on disk.
+        /// </summary>
+        public static AssetPackConfig LoadConfig(string configurationFilePath)
+        {
+            Debug.LogFormat("Loading custom config {0}", configurationFilePath);
+            if (!File.Exists(configurationFilePath))
+            {
+                throw new FileNotFoundException("AssetPackConfig not found", configurationFilePath);
+            }
+
+            var jsonText = File.ReadAllText(configurationFilePath);
+            var config = JsonUtility.FromJson<SerializableAssetPackConfig>(jsonText);
+            return SerializationHelper.Deserialize(config);
+        }
+
+        /// <summary>
+        /// Delete config file.
+        /// </summary>
+        public static void DeleteConfig()
+        {
+            File.Delete(SerializationHelper.ConfigurationFilePath);
+        }
+    }
+}

Assets/GooglePlayPlugins/com.google.android.appbundle/Editor/Scripts/AssetPackConfigSerializer.cs.meta

@@ -0,0 +1,12 @@
+fileFormatVersion: 2
+guid: 3f277e21537064a51a435fbc4d4c713a
+timeCreated: 1582761043
+licenseType: Pro
+MonoImporter:
+  serializedVersion: 2
+  defaultReferences: []
+  executionOrder: 0
+  icon: {instanceID: 0}
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: 

Assets/GooglePlayPlugins/com.google.android.appbundle/Editor/Scripts/AssetPackDeliveryMode.cs

@@ -0,0 +1,43 @@
+// Copyright 2019 Google LLC
+//
+// 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.
+
+namespace Google.Android.AppBundle.Editor
+{
+    /// <summary>
+    /// Indicates whether an asset pack will be included in an Android App Bundle, and if so how it is delivered.
+    /// </summary>
+    public enum AssetPackDeliveryMode
+    {
+        /// <summary>
+        /// Do not include the corresponding asset pack in the Android App Bundle.
+        /// </summary>
+        DoNotPackage = 0,
+
+        /// <summary>
+        /// Deliver the corresponding asset pack when the app is installed.
+        /// </summary>
+        InstallTime = 1,
+
+        /// <summary>
+        /// Deliver the corresponding asset pack immediately after the app is installed and potentially before it is
+        /// opened.
+        /// </summary>
+        FastFollow = 2,
+
+        /// <summary>
+        /// Only deliver the corresponding asset pack when it is explicitly requested by the app.
+        /// </summary>
+        OnDemand = 3
+    }
+}

Assets/GooglePlayPlugins/com.google.android.appbundle/Editor/Scripts/AssetPackDeliveryMode.cs.meta

@@ -0,0 +1,12 @@
+fileFormatVersion: 2
+guid: 4d15a50545f1c4c4586351a1e698bfdc
+timeCreated: 1548906103
+licenseType: Pro
+MonoImporter:
+  serializedVersion: 2
+  defaultReferences: []
+  executionOrder: 0
+  icon: {instanceID: 0}
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: 

Assets/GooglePlayPlugins/com.google.android.appbundle/Editor/Scripts/Bundletool.cs

@@ -0,0 +1,122 @@
+// Copyright 2020 Google LLC
+//
+// 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.
+
+using Google.Android.AppBundle.Editor.Internal;
+using Google.Android.AppBundle.Editor.Internal.BuildTools;
+using UnityEditor;
+#if UNITY_2018_4_OR_NEWER && !NET_LEGACY
+using System.Threading.Tasks;
+
+#endif
+
+namespace Google.Android.AppBundle.Editor
+{
+    /// <summary>
+    /// Helper to build <a href="https://developer.android.com/platform/technology/app-bundle/">Android App Bundle</a>
+    /// files suitable for publishing on <a href="https://play.google.com/console/">Google Play Console</a>.
+    /// </summary>
+    public static class Bundletool
+    {
+#if UNITY_2018_4_OR_NEWER && !NET_LEGACY
+        /// <summary>
+        /// Builds an Android App Bundle using the specified build options.
+        ///
+        /// Before calling this method use PlayInstantBuildSettings.SetInstantBuildType() to decide whether to build an
+        /// instant app bundle or a regular app bundle for installed apps.
+        ///
+        /// This method returns an async Task because it partially runs on a background thread (except in Batch Mode).
+        /// As with other methods that return async tasks, the result can be awaited on or accessed via ContinueWith().
+        /// </summary>
+        /// <param name="androidBuildOptions">Configuration options for the build.</param>
+        /// <returns>An async task that provides an AndroidBuildReport.</returns>
+        /// <exception cref="AndroidBuildException">
+        /// Thrown in case of certain build failures. Includes an AndroidBuildReport when thrown.
+        /// </exception>
+        public static async Task<AndroidBuildReport> BuildBundle(AndroidBuildOptions androidBuildOptions)
+        {
+            return await AppBundlePublisher.BuildTask(androidBuildOptions);
+        }
+
+        /// <summary>
+        /// Build an App Bundle containing only the specified asset packs.
+        /// </summary>
+        /// <param name="assetOnlyBuildOptions">
+        /// Configuration options for the build, including what asset packs to include in the Android App Bundle.
+        /// </param>
+        /// <returns>
+        /// True if the build completed successfully and false otherwise.
+        /// </returns>
+        public static async Task BuildAssetOnlyBundle(AssetOnlyBuildOptions assetOnlyBuildOptions)
+        {
+            await AppBundlePublisher.BuildAssetOnlyBundle(assetOnlyBuildOptions);
+        }
+#endif
+
+        /// <summary>
+        /// Builds an Android App Bundle using the specified build options.
+        ///
+        /// Before calling this method use PlayInstantBuildSettings.SetInstantBuildType() to decide whether to build an
+        /// instant app bundle or a regular app bundle for installed apps.
+        ///
+        /// If this method is invoked in Batch Mode, for example from a command line build, then the entire build will
+        /// run on the main thread. In this case the <see cref="forceSynchronousBuild"/> parameter has no effect.
+        ///
+        /// If this method is invoked by a script running from an interactive Editor UI, some of the build will run on
+        /// a background thread and this method will return before the full build is complete. This behavior can be
+        /// overridden by setting the <see cref="forceSynchronousBuild"/> parameter to true; in this case the entire
+        /// build will run on the main thread. Note that this freezes the Editor UI.
+        ///
+        /// The asynchronous BuildBundle() method method should be preferred when building on Unity 2018.4 or higher.
+        /// </summary>
+        /// <param name="buildPlayerOptions">A Unity BuildPlayerOptions including the output file path.</param>
+        /// <param name="assetPackConfig">The asset packs to include in the Android App Bundle, if any.</param>
+        /// <param name="forceSynchronousBuild">If true, the build should only run on the main thread.</param>
+        /// <returns>
+        /// True if the build succeeded or began running in the background, false if it failed or was cancelled.
+        /// </returns>
+        public static bool BuildBundle(
+            BuildPlayerOptions buildPlayerOptions,
+            AssetPackConfig assetPackConfig = null,
+            bool forceSynchronousBuild = false)
+        {
+            return AppBundlePublisher.Build(buildPlayerOptions, assetPackConfig, forceSynchronousBuild);
+        }
+
+        /// <summary>
+        /// Builds an APK Set (.apks) file from the specified Android App Bundle file (.aab).
+        /// </summary>
+        /// <param name="aabFilePath">An .aab file.</param>
+        /// <param name="apksFilePath">An .apks output ZIP file containing APK files.</param>
+        /// <param name="buildMode">The type of APKs to build from the Android App Bundle.</param>
+        /// <param name="enableLocalTesting">
+        /// If true, enables a testing mode where fast-follow and on-demand asset packs are fetched from local storage
+        /// rather than downloaded.
+        /// </param>
+        /// <returns>An error message if there was a problem running bundletool, or null if successful.</returns>
+        public static string BuildApks(
+            string aabFilePath,
+            string apksFilePath,
+            BundletoolBuildMode buildMode = BundletoolBuildMode.Default,
+            bool enableLocalTesting = false)
+        {
+            var bundletoolHelper = new BundletoolHelper(new JavaUtils());
+            if (bundletoolHelper.Initialize(new BuildToolLogger()))
+            {
+                return bundletoolHelper.BuildApkSet(aabFilePath, apksFilePath, buildMode, enableLocalTesting);
+            }
+
+            return "Failed to initialize bundletool.";
+        }
+    }
+}

Assets/GooglePlayPlugins/com.google.android.appbundle/Editor/Scripts/Bundletool.cs.meta

@@ -0,0 +1,12 @@
+fileFormatVersion: 2
+guid: 801cb4138f93a4a9e9d7dfd5926fefba
+timeCreated: 1581697831
+licenseType: Pro
+MonoImporter:
+  serializedVersion: 2
+  defaultReferences: []
+  executionOrder: 0
+  icon: {instanceID: 0}
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: 

Assets/GooglePlayPlugins/com.google.android.appbundle/Editor/Scripts/BundletoolBuildMode.cs

@@ -0,0 +1,29 @@
+// Copyright 2020 Google LLC
+//
+// 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.
+
+namespace Google.Android.AppBundle.Editor
+{
+    /// <summary>
+    /// Indicates the build mode when building an APK Set with <see cref="Bundletool"/>.
+    /// </summary>
+    public enum BundletoolBuildMode
+    {
+        Default,
+        Universal,
+        System,
+        SystemCompressed,
+        Persistent,
+        Instant
+    }
+}

Assets/GooglePlayPlugins/com.google.android.appbundle/Editor/Scripts/BundletoolBuildMode.cs.meta

@@ -0,0 +1,12 @@
+fileFormatVersion: 2
+guid: 316269c5a97a14720bbcfb91400cf2a8
+timeCreated: 1581700818
+licenseType: Pro
+MonoImporter:
+  serializedVersion: 2
+  defaultReferences: []
+  executionOrder: 0
+  icon: {instanceID: 0}
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: 

Assets/GooglePlayPlugins/com.google.android.appbundle/Editor/Scripts/CompressionOptions.cs

@@ -0,0 +1,54 @@
+// Copyright 2021 Google LLC
+//
+// 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.
+
+using System.Collections.Generic;
+
+namespace Google.Android.AppBundle.Editor
+{
+    /// <summary>
+    /// Options that override the default Android App Bundle (AAB) compression settings for base APKs and install-time
+    /// asset pack APKs. The asset files in on-demand and fast-follow asset packs are always stored uncompressed.
+    ///
+    /// The default values for these options lead to APKs containing uncompressed files. This generally results in
+    /// faster APK downloads, smaller update patches, and straightforward asset loading. These settings should
+    /// generally only be changed in advanced use cases when the top priority is reducing on-disk APK size.
+    /// </summary>
+    public class CompressionOptions
+    {
+        /// <summary>
+        /// A list of file globs for matching files that should be kept uncompressed within the base APK or
+        /// install-time asset pack APKs. Matching occurs against the path of files within a generated APK using
+        /// forward slash ('/') as a separator, for example "assets/**/*.txt".
+        /// </summary>
+        public List<string> UncompressedGlobs { get; set; }
+
+        /// <summary>
+        /// Indicates the compression strategy for asset files in install-time asset packs. By default (when false),
+        /// asset files are stored uncompressed in the generated install-time asset pack APKs. If this setting is
+        /// enabled and a file matches one of the <see cref="UncompressedGlobs"/>, the <see cref="UncompressedGlobs"/>
+        /// setting takes precedence and the file is stored uncompressed in the generated APK.
+        /// </summary>
+        public bool CompressInstallTimeAssetPacks { get; set; }
+
+        /// <summary>
+        /// Indicates the compression strategy for asset files added to an AAB from the
+        /// <a href="https://docs.unity3d.com/Manual/StreamingAssets.html">StreamingAssets folder</a>.
+        /// By default (when false), the asset files are stored uncompressed in both the generated base APK and any
+        /// install-time asset pack APKs. If this setting is enabled and a file matches one of the
+        /// <see cref="UncompressedGlobs"/>, the <see cref="UncompressedGlobs"/> takes
+        /// precedence and the file is stored uncompressed in the generated APK.
+        /// </summary>
+        public bool CompressStreamingAssets { get; set; }
+    }
+}

Assets/GooglePlayPlugins/com.google.android.appbundle/Editor/Scripts/CompressionOptions.cs.meta

@@ -0,0 +1,11 @@
+fileFormatVersion: 2
+guid: 874234f05df734fa594e364198f4e4ac
+MonoImporter:
+  externalObjects: {}
+  serializedVersion: 2
+  defaultReferences: []
+  executionOrder: 0
+  icon: {instanceID: 0}
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: 

Assets/GooglePlayPlugins/com.google.android.appbundle/Editor/Scripts/DeviceTier.cs

@@ -0,0 +1,106 @@
+// Copyright 2020 Google LLC
+//
+// 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.
+
+using System;
+
+namespace Google.Android.AppBundle.Editor
+{
+    /// <summary>
+    /// The device tier labels that can be recognized in an asset pack folder name.
+    /// </summary>
+    public class DeviceTier
+    {
+        /// <summary>
+        /// Factory method.
+        /// </summary>
+        /// <param name="tier">The tier level.</param>>
+        /// <exception cref="ArgumentException">Thrown if the level is a negative int.</exception>
+        public static DeviceTier From(int tier)
+        {
+            return new DeviceTier(tier);
+        }
+
+        /// <summary>
+        /// Returns the tier level.
+        ///
+        /// Device tier levels determines the priority of what variation of app content gets
+        /// served to a specific device, for device-targeted content.
+        /// Tiers are evaluated from the highest to the lowest level; the highest
+        /// tier matching a given device is selected for that device.
+        /// </summary>
+        public int Tier { get; private set; }
+
+        /// <summary>
+        /// Implicit conversion from DeviceTier to int.
+        /// </summary>
+        public static implicit operator int(DeviceTier deviceTier)
+        {
+            return deviceTier.Tier;
+        }
+
+        /// <summary>
+        /// Implicit conversion from int to DeviceTier.
+        /// </summary>
+        public static implicit operator DeviceTier(int tier)
+        {
+            return new DeviceTier(tier);
+        }
+
+        /// <summary>
+        /// ToString conversion.
+        /// </summary>
+        public override string ToString()
+        {
+            return Convert.ToString(Tier);
+        }
+
+        /// <summary>
+        /// Equal comparision override for DeviceTier objects.
+        /// </summary>
+        public override bool Equals(object other)
+        {
+            var otherTier = other as DeviceTier;
+            if (otherTier != null)
+            {
+                return Tier == otherTier.Tier;
+            }
+
+            return false;
+        }
+
+        /// <summary>
+        /// Creates hash code for DeviceTier object from underlying tier value.
+        /// </summary>
+        public override int GetHashCode()
+        {
+            return Tier.GetHashCode();
+        }
+
+        /// <summary>
+        /// Constructor.
+        /// </summary>
+        /// <param name="tier">The tier level.</param>>
+        /// <exception cref="ArgumentException">Thrown if the level is a negative int.</exception>
+        private DeviceTier(int tier)
+        {
+            if (tier < 0)
+            {
+                throw new ArgumentException(
+                    String.Format("Tier levels are required to be non-negative integers, but found {0}.", tier));
+            }
+
+            Tier = tier;
+        }
+    }
+}

Assets/GooglePlayPlugins/com.google.android.appbundle/Editor/Scripts/DeviceTier.cs.meta

@@ -0,0 +1,3 @@
+fileFormatVersion: 2
+guid: e9a5886ee61a408c939351e7a04afe20
+timeCreated: 1602848407

Assets/GooglePlayPlugins/com.google.android.appbundle/Editor/Scripts/Internal.meta

@@ -0,0 +1,9 @@
+fileFormatVersion: 2
+guid: 7633a19d17e4c452a9c98b305f25746e
+folderAsset: yes
+timeCreated: 1580752771
+licenseType: Pro
+DefaultImporter:
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: 

Assets/GooglePlayPlugins/com.google.android.appbundle/Editor/Scripts/Internal/AndroidArchitectureHelper.cs

@@ -0,0 +1,113 @@
+// Copyright 2019 Google LLC
+//
+// 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.
+
+using UnityEditor;
+
+namespace Google.Android.AppBundle.Editor.Internal
+{
+    /// <summary>
+    /// Provides utilities for checking whether this version of Unity supports building ARM64 libraries.
+    /// </summary>
+    public static class AndroidArchitectureHelper
+    {
+        /// <summary>
+        /// Indicates the current status of architecture-related build settings.
+        /// </summary>
+        public enum Status
+        {
+            /// <summary>
+            /// No issues with selected architectures.
+            /// </summary>
+            Ok,
+
+            /// <summary>
+            /// ARMv7 is disabled.
+            /// </summary>
+            ArmV7Disabled,
+
+            /// <summary>
+            /// IL2CPP is disabled, also implying that ARM64 is unavailable.
+            /// </summary>
+            Il2CppDisabled,
+
+            /// <summary>
+            /// IL2CPP is enabled, but ARM64 is disabled.
+            /// </summary>
+            Arm64Disabled
+        }
+
+        /// <summary>
+        /// Returns true if this version of the Unity Editor has native support for building an Android App Bundle,
+        /// and false otherwise.
+        /// </summary>
+        public static Status ArchitectureStatus
+        {
+            get
+            {
+                if (!IsArchitectureEnabled(AndroidArchitecture.ARMv7))
+                {
+                    return Status.ArmV7Disabled;
+                }
+
+                if (PlayerSettings.GetScriptingBackend(BuildTargetGroup.Android) != ScriptingImplementation.IL2CPP)
+                {
+                    return Status.Il2CppDisabled;
+                }
+
+                return IsArchitectureEnabled(AndroidArchitecture.ARM64)
+                    ? Status.Ok
+                    : Status.Arm64Disabled;
+            }
+        }
+
+        /// <summary>
+        /// Enables an IL2CPP build of ARMv7 and ARM64 without affecting whether X86 is enabled.
+        /// IL2CPP is required since Unity's Mono scripting backend doesn't support ARM64.
+        /// </summary>
+        public static void FixTargetArchitectures()
+        {
+            PlayerSettings.SetScriptingBackend(BuildTargetGroup.Android, ScriptingImplementation.IL2CPP);
+            PlayerSettings.Android.targetArchitectures |= AndroidArchitecture.ARMv7 | AndroidArchitecture.ARM64;
+        }
+
+        /// <summary>
+        /// Enable the IL2CPP scripting backend and all Android architectures supported by IL2CPP builds.
+        /// </summary>
+        public static void EnableIl2CppBuildArchitectures()
+        {
+            PlayerSettings.SetScriptingBackend(BuildTargetGroup.Android, ScriptingImplementation.IL2CPP);
+            PlayerSettings.Android.targetArchitectures = AndroidArchitecture.All;
+        }
+
+        /// <summary>
+        /// Enable the Mono scripting backend and all Android architectures supported by Mono builds.
+        /// Note: Unity 2019.4.31+ only supports x86 for IL2CPP builds.
+        /// </summary>
+        public static void EnableMonoBuildArchitectures()
+        {
+            PlayerSettings.SetScriptingBackend(BuildTargetGroup.Android, ScriptingImplementation.Mono2x);
+#if UNITY_2019_3_OR_NEWER
+            PlayerSettings.Android.targetArchitectures = AndroidArchitecture.ARMv7;
+#else
+            PlayerSettings.Android.targetArchitectures = AndroidArchitecture.ARMv7 | AndroidArchitecture.X86;
+#endif
+        }
+
+        private static bool IsArchitectureEnabled(AndroidArchitecture androidArchitecture)
+        {
+            // Note: Enum.HasFlag() was introduced in .NET 4.x
+            return (PlayerSettings.Android.targetArchitectures & androidArchitecture) == androidArchitecture;
+        }
+    }
+}

Assets/GooglePlayPlugins/com.google.android.appbundle/Editor/Scripts/Internal/AndroidArchitectureHelper.cs.meta

@@ -0,0 +1,11 @@
+fileFormatVersion: 2
+guid: f33b5abf4e34544e597d9b43a21c8741
+MonoImporter:
+  externalObjects: {}
+  serializedVersion: 2
+  defaultReferences: []
+  executionOrder: 0
+  icon: {instanceID: 0}
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: 

Assets/GooglePlayPlugins/com.google.android.appbundle/Editor/Scripts/Internal/AndroidManifest.meta

@@ -0,0 +1,9 @@
+fileFormatVersion: 2
+guid: dac17760a2fd2434188c3671e822fcc2
+folderAsset: yes
+timeCreated: 1540331103
+licenseType: Pro
+DefaultImporter:
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: 

Assets/GooglePlayPlugins/com.google.android.appbundle/Editor/Scripts/Internal/AndroidManifest/AssetPackManifestHelper.cs

@@ -0,0 +1,71 @@
+// Copyright 2018 Google LLC
+//
+// 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.
+
+using System;
+using System.Xml.Linq;
+using Google.Android.AppBundle.Editor.AssetPacks;
+
+namespace Google.Android.AppBundle.Editor.Internal.AndroidManifest
+{
+    /// <summary>
+    /// A helper class for creating asset pack AndroidManifest xml documents.
+    /// </summary>
+    public static class AssetPackManifestHelper
+    {
+        /// <summary>
+        /// Creates a new XDocument representing the AndroidManifest.xml for an asset pack.
+        /// </summary>
+        /// <param name="packageName">Package name of this application.</param>
+        /// <param name="assetPackName">The name of the asset pack.</param>
+        /// <param name="deliveryMode">The <see cref="AssetPackDeliveryMode"/> of this asset pack.</param>
+        public static XDocument CreateAssetPackManifestXDocument(
+            string packageName, string assetPackName, AssetPackDeliveryMode deliveryMode)
+        {
+            // TODO(b/129943210): Add support for <dist:instant-delivery>
+            var deliveryTypeXName = ManifestConstants.DistDeliveryXName;
+            XName deliveryModeXName;
+            switch (deliveryMode)
+            {
+                case AssetPackDeliveryMode.OnDemand:
+                    deliveryModeXName = ManifestConstants.DistOnDemandXName;
+                    break;
+                case AssetPackDeliveryMode.InstallTime:
+                    deliveryModeXName = ManifestConstants.DistInstallTimeName;
+                    break;
+                case AssetPackDeliveryMode.FastFollow:
+                    deliveryModeXName = ManifestConstants.DistFastFollowName;
+                    break;
+                default:
+                    throw new ArgumentException("Unexpected delivery mode: " + deliveryMode, "deliveryMode");
+            }
+
+            var moduleElement = new XElement(
+                ManifestConstants.DistModuleXName,
+                new XAttribute(ManifestConstants.DistTypeXName, ManifestConstants.AssetPack),
+                new XElement(deliveryTypeXName,
+                    new XElement(deliveryModeXName)),
+                new XElement(ManifestConstants.DistFusingXName,
+                    new XAttribute(ManifestConstants.DistIncludeXName, ManifestConstants.ValueTrue))
+            );
+
+            return new XDocument(new XElement(
+                ManifestConstants.Manifest,
+                new XAttribute(ManifestConstants.AndroidXmlns, XNamespace.Get(ManifestConstants.AndroidNamespaceUrl)),
+                new XAttribute(ManifestConstants.DistXmlns, XNamespace.Get(ManifestConstants.DistNamespaceUrl)),
+                new XAttribute(ManifestConstants.Package, packageName),
+                new XAttribute(ManifestConstants.Split, assetPackName),
+                moduleElement));
+        }
+    }
+}

Assets/GooglePlayPlugins/com.google.android.appbundle/Editor/Scripts/Internal/AndroidManifest/AssetPackManifestHelper.cs.meta

@@ -0,0 +1,12 @@
+fileFormatVersion: 2
+guid: f3c4c13f33e6f48dc9e8130d699f1428
+timeCreated: 1540331105
+licenseType: Pro
+MonoImporter:
+  serializedVersion: 2
+  defaultReferences: []
+  executionOrder: 0
+  icon: {instanceID: 0}
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: 

Assets/GooglePlayPlugins/com.google.android.appbundle/Editor/Scripts/Internal/AndroidManifest/IAssetPackManifestTransformer.cs

@@ -0,0 +1,31 @@
+// Copyright 2019 Google LLC
+//
+// 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.
+
+using System.Xml.Linq;
+using Google.Android.AppBundle.Editor.Internal.BuildTools;
+
+namespace Google.Android.AppBundle.Editor.Internal.AndroidManifest
+{
+    /// <summary>
+    /// Provides an interface to modify the AndroidManifest xml documents configured for asset packs.
+    /// </summary>
+    public interface IAssetPackManifestTransformer : IBuildTool
+    {
+        /// <summary>
+        /// Modifies the specified AndroidManifest xml document. Returns an error message if the operation fails and
+        /// null otherwise.
+        /// </summary>
+        string Transform(XDocument document);
+    }
+}

Assets/GooglePlayPlugins/com.google.android.appbundle/Editor/Scripts/Internal/AndroidManifest/IAssetPackManifestTransformer.cs.meta

@@ -0,0 +1,3 @@
+fileFormatVersion: 2
+guid: 12432c2ade03483e9e956f11ddde2992
+timeCreated: 1574716612

Assets/GooglePlayPlugins/com.google.android.appbundle/Editor/Scripts/Internal/AndroidManifest/ManifestConstants.cs

@@ -0,0 +1,66 @@
+// Copyright 2019 Google LLC
+//
+// 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.
+
+using System.Xml.Linq;
+
+namespace Google.Android.AppBundle.Editor.Internal.AndroidManifest
+{
+    /// <summary>
+    /// String constants used by AndroidManifest.xml files.
+    /// </summary>
+    public static class ManifestConstants
+    {
+        public const string Action = "action";
+        public const string Activity = "activity";
+        public const string Application = "application";
+        public const string AssetPack = "asset-pack";
+        public const string Category = "category";
+        public const string Data = "data";
+        public const string IntentFilter = "intent-filter";
+        public const string Manifest = "manifest";
+        public const string Package = "package";
+        public const string Service = "service";
+        public const string Split = "split";
+        public const string ValueTrue = "true";
+
+        public const string AndroidNamespaceAlias = "android";
+        public const string AndroidNamespaceUrl = "http://schemas.android.com/apk/res/android";
+        public static readonly XName AndroidXmlns = XNamespace.Xmlns + AndroidNamespaceAlias;
+        public static readonly XName AndroidEnabledXName = XName.Get("enabled", AndroidNamespaceUrl);
+        public static readonly XName AndroidIconXName = XName.Get("icon", AndroidNamespaceUrl);
+        public static readonly XName AndroidLabelXName = XName.Get("label", AndroidNamespaceUrl);
+        public static readonly XName AndroidNameXName = XName.Get("name", AndroidNamespaceUrl);
+
+        public static readonly XName AndroidTargetSandboxVersionXName =
+            XName.Get("targetSandboxVersion", AndroidNamespaceUrl);
+
+        public const string DistNamespaceAlias = "dist";
+        public const string DistNamespaceUrl = "http://schemas.android.com/apk/distribution";
+        public static readonly XName DistXmlns = XNamespace.Xmlns + DistNamespaceAlias;
+        public static readonly XName DistDeliveryXName = XName.Get("delivery", DistNamespaceUrl);
+        public static readonly XName DistFastFollowName = XName.Get("fast-follow", DistNamespaceUrl);
+        public static readonly XName DistFusingXName = XName.Get("fusing", DistNamespaceUrl);
+        public static readonly XName DistIncludeXName = XName.Get("include", DistNamespaceUrl);
+        public static readonly XName DistInstallTimeName = XName.Get("install-time", DistNamespaceUrl);
+        public static readonly XName DistInstantXName = XName.Get("instant", DistNamespaceUrl);
+        public static readonly XName DistModuleXName = XName.Get("module", DistNamespaceUrl);
+        public static readonly XName DistOnDemandXName = XName.Get("on-demand", DistNamespaceUrl);
+        public static readonly XName DistTypeXName = XName.Get("type", DistNamespaceUrl);
+
+        public const string ToolsNamespaceAlias = "tools";
+        public const string ToolsNamespaceUrl = "http://schemas.android.com/tools";
+        public static readonly XName ToolsXmlns = XNamespace.Xmlns + ToolsNamespaceAlias;
+        public static readonly XName ToolsReplaceXName = XName.Get("replace", ToolsNamespaceUrl);
+    }
+}

Assets/GooglePlayPlugins/com.google.android.appbundle/Editor/Scripts/Internal/AndroidManifest/ManifestConstants.cs.meta

@@ -0,0 +1,12 @@
+fileFormatVersion: 2
+guid: 16b5ed2898b684f67ab9286244de2e19
+timeCreated: 1556563916
+licenseType: Pro
+MonoImporter:
+  serializedVersion: 2
+  defaultReferences: []
+  executionOrder: 0
+  icon: {instanceID: 0}
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: 

Assets/GooglePlayPlugins/com.google.android.appbundle/Editor/Scripts/Internal/AppBundleEditorMenu.cs

@@ -0,0 +1,75 @@
+// Copyright 2019 Google LLC
+//
+// 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.
+
+using Google.Android.AppBundle.Editor.Internal.AssetPacks;
+using UnityEditor;
+using UnityEngine;
+
+namespace Google.Android.AppBundle.Editor.Internal
+{
+    /// <summary>
+    /// Provides "Android App Bundle" and Android build related menu items for the Unity Editor.
+    /// </summary>
+    public static class AppBundleEditorMenu
+    {
+        private const string AppBundleMenuName = GoogleEditorMenu.MainMenuName + "/Android App Bundle/";
+        private const string RootMenuName = GoogleEditorMenu.MainMenuName + "/";
+
+        private const int AboveLine = GoogleEditorMenu.AndroidAppBundlePriority;
+        private const int BelowLine = GoogleEditorMenu.AndroidAppBundlePriority + GoogleEditorMenu.SeparatorSize;
+
+        [MenuItem(AppBundleMenuName + "Asset Delivery Settings...", false, AboveLine)]
+        private static void ShowAssetDeliveryWindow()
+        {
+            AssetDeliveryWindow.ShowWindow();
+        }
+
+        [MenuItem(AppBundleMenuName + GoogleEditorMenu.BuildSettings, false, AboveLine + 1)]
+        private static void OpenEditorSettings()
+        {
+            BuildSettingsWindow.ShowWindow();
+        }
+
+        [MenuItem(AppBundleMenuName + GoogleEditorMenu.ViewDocumentation, false, BelowLine)]
+        private static void ViewDocumentation()
+        {
+            Application.OpenURL("https://developer.android.com/guide/app-bundle/asset-delivery/build-unity");
+        }
+
+        [MenuItem(AppBundleMenuName + GoogleEditorMenu.ViewLicense, false, BelowLine + 1)]
+        private static void ViewLicense()
+        {
+            // The guid is for GooglePlayPlugins/com.google.android.appbundle/LICENSE.md
+            GoogleEditorMenu.OpenFileByGuid("4b995f494568e47259d526c5211d778b");
+        }
+
+        [MenuItem(AppBundleMenuName + GoogleEditorMenu.FileBug, false, BelowLine + 2)]
+        private static void ViewPlayPluginsIssuesPage()
+        {
+            GoogleEditorMenu.ViewPlayPluginsIssuesPage();
+        }
+
+        [MenuItem(RootMenuName + "Build Android App Bundle...", false, GoogleEditorMenu.RootMenuPriority + 10)]
+        private static void BuildAndroidAppBundle()
+        {
+            AppBundlePublisher.Build();
+        }
+
+        [MenuItem(RootMenuName + "Build and Run #%r", false, GoogleEditorMenu.RootMenuPriority + 11)]
+        private static void BuildAndRun()
+        {
+            BuildAndRunner.BuildAndRun();
+        }
+    }
+}

Assets/GooglePlayPlugins/com.google.android.appbundle/Editor/Scripts/Internal/AppBundleEditorMenu.cs.meta

@@ -0,0 +1,11 @@
+fileFormatVersion: 2
+guid: 79f87642d146d41d7bdaaa2328b529b8
+MonoImporter:
+  externalObjects: {}
+  serializedVersion: 2
+  defaultReferences: []
+  executionOrder: 0
+  icon: {instanceID: 0}
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: 

Assets/GooglePlayPlugins/com.google.android.appbundle/Editor/Scripts/Internal/AppBundlePublisher.cs

@@ -0,0 +1,310 @@
+// Copyright 2018 Google LLC
+//
+// 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.
+
+using System;
+using System.IO;
+using Google.Android.AppBundle.Editor.AssetPacks;
+using Google.Android.AppBundle.Editor.Internal.BuildTools;
+using UnityEditor;
+#if !UNITY_2018_3_OR_NEWER
+using Google.Android.AppBundle.Editor.Internal.Config;
+#endif
+#if UNITY_2018_2_OR_NEWER
+using UnityEngine;
+#endif
+#if UNITY_2018_4_OR_NEWER && !NET_LEGACY
+using System.Threading.Tasks;
+#endif
+
+namespace Google.Android.AppBundle.Editor.Internal
+{
+    /// <summary>
+    /// Helper to build <a href="https://developer.android.com/platform/technology/app-bundle/">Android App Bundles</a>.
+    /// </summary>
+    public static class AppBundlePublisher
+    {
+        private class AppBundleBuildSettings
+        {
+            public BuildPlayerOptions buildPlayerOptions;
+            public AssetPackConfig assetPackConfig;
+            public bool runOnDevice;
+            public bool forceSynchronousBuild;
+        }
+
+#if !UNITY_2018_3_OR_NEWER
+        /// <summary>
+        /// A <see cref="PostBuildTask"/> that serializes state to resume an app bundle build after a script reload
+        /// occurs. Starting with Unity 2018.3 player builds no longer reset the application domain.
+        /// </summary>
+        [Serializable]
+        private class AppBundlePostBuildTask : PostBuildTask
+        {
+            public SerializableAssetPackConfig serializableAssetPackConfig;
+            public string workingDirectoryPath;
+            public string aabFilePath;
+            public bool runOnDevice;
+
+            public override void RunPostBuildTask()
+            {
+                var buildToolLogger = new BuildToolLogger();
+                var appBundleBuilder = CreateAppBundleBuilder(workingDirectoryPath);
+                if (!appBundleBuilder.Initialize(buildToolLogger))
+                {
+                    buildToolLogger.DisplayErrorDialog("Failed to initialize AppBundleBuilder in post-build task.");
+                    return;
+                }
+
+                var assetPackConfig = SerializationHelper.Deserialize(serializableAssetPackConfig);
+                CreateBundleAsync(appBundleBuilder, aabFilePath, assetPackConfig, runOnDevice);
+            }
+        }
+#endif
+
+        private static IBuildModeProvider _buildModeProvider;
+
+#if UNITY_2018_4_OR_NEWER && !NET_LEGACY
+        /// <summary>
+        /// Builds an Android App Bundle given the specified configuration.
+        /// </summary>
+        public static async Task<AndroidBuildReport> BuildTask(AndroidBuildOptions androidBuildOptions)
+        {
+            var appBundleBuilder = CreateAppBundleBuilder();
+            if (!appBundleBuilder.Initialize(new BuildToolLogger()))
+            {
+                throw new Exception("Failed to initialize AppBundleBuilder");
+            }
+
+            return await appBundleBuilder.CreateBundleWithTask(androidBuildOptions);
+        }
+
+        /// <summary>
+        /// Builds an Android App Bundle containing only asset packs.
+        /// </summary>
+        public static async Task BuildAssetOnlyBundle(AssetOnlyBuildOptions assetOnlyBuildOptions)
+        {
+            var appBundleBuilder = CreateAppBundleBuilder();
+            if (!appBundleBuilder.Initialize(new BuildToolLogger()))
+            {
+                throw new Exception("Failed to initialize AppBundleBuilder");
+            }
+
+            await appBundleBuilder.CreateAssetOnlyBundle(assetOnlyBuildOptions);
+        }
+#endif
+
+        /// <summary>
+        /// Builds an Android App Bundle given the specified configuration.
+        /// </summary>
+        public static bool Build(
+            BuildPlayerOptions buildPlayerOptions, AssetPackConfig assetPackConfig, bool forceSynchronousBuild)
+        {
+            var appBundleBuilder = CreateAppBundleBuilder();
+            if (!appBundleBuilder.Initialize(new BuildToolLogger()))
+            {
+                return false;
+            }
+
+            var buildSettings = new AppBundleBuildSettings
+            {
+                buildPlayerOptions = buildPlayerOptions,
+                assetPackConfig = assetPackConfig ?? new AssetPackConfig(),
+                forceSynchronousBuild = forceSynchronousBuild
+            };
+            return Build(appBundleBuilder, buildSettings);
+        }
+
+        /// <summary>
+        /// Builds an Android App Bundle at a location specified in a file save dialog.
+        /// The AAB will include asset packs configured in Asset Delivery Settings.
+        /// </summary>
+        public static void Build()
+        {
+            // Check that we're ready to build before displaying the file save dialog.
+            var appBundleBuilder = CreateAppBundleBuilder();
+            if (!appBundleBuilder.Initialize(new BuildToolLogger()))
+            {
+                return;
+            }
+
+            var aabFilePath = EditorUtility.SaveFilePanel("Create Android App Bundle", null, null, "aab");
+            if (string.IsNullOrEmpty(aabFilePath))
+            {
+                // Assume cancelled.
+                return;
+            }
+
+            var buildSettings = new AppBundleBuildSettings
+            {
+                buildPlayerOptions = AndroidBuildHelper.CreateBuildPlayerOptions(aabFilePath),
+                assetPackConfig = AssetPackConfigSerializer.LoadConfig()
+            };
+            Build(appBundleBuilder, buildSettings);
+        }
+
+        /// <summary>
+        /// Builds an Android App Bundle to a temp directory and then runs it on device.
+        /// </summary>
+        /// <param name="assetPackConfig">The asset pack configuration to use when building.</param>
+        public static void BuildAndRun(AssetPackConfig assetPackConfig)
+        {
+            var appBundleBuilder = CreateAppBundleBuilder();
+            if (!appBundleBuilder.Initialize(new BuildToolLogger()))
+            {
+                return;
+            }
+
+            var tempOutputFilePath = Path.Combine(appBundleBuilder.WorkingDirectoryPath, "temp.aab");
+            var buildSettings = new AppBundleBuildSettings
+            {
+                buildPlayerOptions = AndroidBuildHelper.CreateBuildPlayerOptions(tempOutputFilePath),
+                assetPackConfig = assetPackConfig,
+                runOnDevice = true
+            };
+            Build(appBundleBuilder, buildSettings);
+        }
+
+        /// <summary>
+        /// Sets the current BuildModeProvider. Should be called in a class annotated with "InitializeOnLoad" in order
+        /// for it to be assigned after assembly reload.
+        /// </summary>
+        public static void SetBuildModeProvider(IBuildModeProvider buildModeProvider)
+        {
+            _buildModeProvider = buildModeProvider;
+        }
+
+        private static bool Build(AppBundleBuilder appBundleBuilder, AppBundleBuildSettings buildSettings)
+        {
+            var androidBuildResult = appBundleBuilder.BuildAndroidPlayer(buildSettings.buildPlayerOptions);
+            if (!androidBuildResult.Succeeded)
+            {
+                return false;
+            }
+
+            var aabFilePath = buildSettings.buildPlayerOptions.locationPathName;
+            if (IsBatchMode || buildSettings.forceSynchronousBuild)
+            {
+                var createBundleOptions = new CreateBundleOptions
+                {
+                    AabFilePath = aabFilePath, AssetPackConfig = buildSettings.assetPackConfig
+                };
+                var errorMessage = appBundleBuilder.CreateBundle(createBundleOptions);
+                return errorMessage == null;
+            }
+
+#if UNITY_2018_3_OR_NEWER
+            CreateBundleAsync(appBundleBuilder, aabFilePath, buildSettings.assetPackConfig, buildSettings.runOnDevice);
+#else
+            var task = new AppBundlePostBuildTask
+            {
+                serializableAssetPackConfig = SerializationHelper.Serialize(buildSettings.assetPackConfig),
+                workingDirectoryPath = appBundleBuilder.WorkingDirectoryPath,
+                aabFilePath = aabFilePath,
+                runOnDevice = buildSettings.runOnDevice
+            };
+            PostBuildRunner.RunTask(task);
+#endif
+            // This return value should be ignored since the build is being finished asynchronously.
+            return true;
+        }
+
+        private static void CreateBundleAsync(
+            AppBundleBuilder appBundleBuilder, string aabFilePath, AssetPackConfig assetPackConfig, bool runOnDevice)
+        {
+            var callback =
+                runOnDevice
+                    ? (AppBundleBuilder.PostBuildCallback) RunBundle
+                    : EditorUtility.RevealInFinder;
+
+            var createBundleOptions = new CreateBundleOptions
+            {
+                AabFilePath = aabFilePath, AssetPackConfig = assetPackConfig
+            };
+            appBundleBuilder.CreateBundleAsync(createBundleOptions, callback);
+        }
+
+        private static void RunBundle(string aabFile)
+        {
+            var buildToolLogger = new BuildToolLogger();
+            var appBundleRunner = CreateAppBundleRunner();
+            if (!appBundleRunner.Initialize(buildToolLogger))
+            {
+                buildToolLogger.DisplayErrorDialog("Failed to initialize AppBundleRunner.");
+                return;
+            }
+
+            appBundleRunner.RunBundle(aabFile, GetBuildMode());
+        }
+
+        private static AppBundleBuilder CreateAppBundleBuilder()
+        {
+            return CreateAppBundleBuilder(GetTempFolder());
+        }
+
+        private static AppBundleBuilder CreateAppBundleBuilder(string workingDirectoryPath)
+        {
+            var androidSdk = new AndroidSdk();
+            var javaUtils = new JavaUtils();
+            var androidSdkPlatform = new AndroidSdkPlatform(androidSdk);
+            var androidBuildTools = new AndroidBuildTools(androidSdk);
+            var jarSigner = new JarSigner(javaUtils);
+            return new AppBundleBuilder(
+                new AndroidAssetPackagingTool(androidBuildTools, androidSdkPlatform),
+                new AndroidBuilder(androidSdkPlatform),
+                new BundletoolHelper(javaUtils),
+                jarSigner,
+                workingDirectoryPath,
+                new ZipUtils(javaUtils));
+        }
+
+        private static AppBundleRunner CreateAppBundleRunner()
+        {
+            var androidSdk = new AndroidSdk();
+            var javaUtils = new JavaUtils();
+            var adb = new AndroidDebugBridge(androidSdk);
+            var bundletool = new BundletoolHelper(javaUtils);
+            return new AppBundleRunner(adb, bundletool);
+        }
+
+        private static string GetTempFolder()
+        {
+            // Create a new temp folder with each build. Some developers prefer a random path here since there may be
+            // multiple builds running concurrently, e.g. on an automated build machine. See Issue #69.
+            // Note: this plugin doesn't clear out old temporary build folders, so disk usage will grow over time.
+            // Note: we use the 2 argument Path.Combine() to support .NET 3.
+            return Path.Combine(Path.Combine(Path.GetTempPath(), "play-unity-build"), Path.GetRandomFileName());
+        }
+
+        private static BundletoolBuildMode GetBuildMode()
+        {
+            if (_buildModeProvider != null)
+            {
+                return _buildModeProvider.GetBuildMode();
+            }
+
+            return BundletoolBuildMode.Persistent;
+        }
+
+        private static bool IsBatchMode
+        {
+            get
+            {
+#if UNITY_2018_2_OR_NEWER
+                return Application.isBatchMode;
+#else
+                return Environment.CommandLine.Contains("-batchmode");
+#endif
+            }
+        }
+    }
+}

Assets/GooglePlayPlugins/com.google.android.appbundle/Editor/Scripts/Internal/AppBundlePublisher.cs.meta

@@ -0,0 +1,12 @@
+fileFormatVersion: 2
+guid: 067a2af83af994d2bab4a749cba47b73
+timeCreated: 1540331104
+licenseType: Pro
+MonoImporter:
+  serializedVersion: 2
+  defaultReferences: []
+  executionOrder: 0
+  icon: {instanceID: 0}
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: 

Assets/GooglePlayPlugins/com.google.android.appbundle/Editor/Scripts/Internal/AssetOnlyOptions.cs

@@ -0,0 +1,34 @@
+// Copyright 2021 Google LLC
+//
+// 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.
+
+using System.Collections.Generic;
+
+namespace Google.Android.AppBundle.Editor.Internal
+{
+    /// <summary>
+    /// Build Options for building asset-only app bundles.
+    /// </summary>
+    public class AssetOnlyOptions
+    {
+        /// <summary>
+        /// A list of app versions that are eligible to update to this asset-only app bundle.
+        /// </summary>
+        public IList<long> AppVersions { get; set; }
+
+        /// <summary>
+        /// A string uniquely identifying this asset-only app bundle.
+        /// </summary>
+        public string AssetVersionTag { get; set; }
+    }
+}

Assets/GooglePlayPlugins/com.google.android.appbundle/Editor/Scripts/Internal/AssetOnlyOptions.cs.meta

@@ -0,0 +1,11 @@
+fileFormatVersion: 2
+guid: 36ce805c46a1445b5b499fbe670efae4
+MonoImporter:
+  externalObjects: {}
+  serializedVersion: 2
+  defaultReferences: []
+  executionOrder: 0
+  icon: {instanceID: 0}
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: 

Assets/GooglePlayPlugins/com.google.android.appbundle/Editor/Scripts/Internal/AssetPackManifestTransformerRegistry.cs

@@ -0,0 +1,39 @@
+// Copyright 2020 Google LLC
+//
+// 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.
+
+using Google.Android.AppBundle.Editor.Internal.AndroidManifest;
+
+namespace Google.Android.AppBundle.Editor.Internal
+{
+    /// <summary>
+    /// Provides a <see cref="Registry"/> of <see cref="IAssetPackManifestTransformer"/>s.
+    /// </summary>
+    public class AssetPackManifestTransformerRegistry : Registry<IAssetPackManifestTransformer>
+    {
+        private static AssetPackManifestTransformerRegistry _instance;
+
+        public static AssetPackManifestTransformerRegistry Registry
+        {
+            get
+            {
+                if (_instance == null)
+                {
+                    _instance = new AssetPackManifestTransformerRegistry();
+                }
+
+                return _instance;
+            }
+        }
+    }
+}

Assets/GooglePlayPlugins/com.google.android.appbundle/Editor/Scripts/Internal/AssetPackManifestTransformerRegistry.cs.meta

@@ -0,0 +1,3 @@
+fileFormatVersion: 2
+guid: d02bb9eaf0454eeda560629d83c032ce
+timeCreated: 1574886319

Assets/GooglePlayPlugins/com.google.android.appbundle/Editor/Scripts/Internal/AssetPacks.meta

@@ -0,0 +1,8 @@
+fileFormatVersion: 2
+guid: f68087b1bfbaa4196b496b765b6f3b91
+folderAsset: yes
+DefaultImporter:
+  externalObjects: {}
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: 

Assets/GooglePlayPlugins/com.google.android.appbundle/Editor/Scripts/Internal/AssetPacks/AssetBundleFolder.cs

@@ -0,0 +1,184 @@
+// Copyright 2019 Google LLC
+//
+// 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.
+
+using System;
+using System.Collections.Generic;
+using System.IO;
+using System.Linq;
+using UnityEngine;
+
+namespace Google.Android.AppBundle.Editor.Internal.AssetPacks
+{
+    /// <summary>
+    /// Internal-only representation of a folder containing AssetBundles.
+    /// </summary>
+    public class AssetBundleFolder
+    {
+        /// <summary>
+        /// The error state of this folder or <see cref="AssetPackFolderState.Ok"/>.
+        /// </summary>
+        public AssetPackFolderState State { get; private set; }
+
+        /// <summary>
+        /// The path represented by the folder.
+        /// </summary>
+        public string FolderPath { get; private set; }
+
+        /// <summary>
+        /// The texture compression format of AssetBundles inside this folder, based on the folder name.
+        /// </summary>
+        public TextureCompressionFormat TextureCompressionFormat { get; private set; }
+
+        /// <summary>
+        /// The number of AssetBundles found in this folder.
+        /// Note: this value is cached during calls to <see cref="ExtractAssetBundleVariant"/>.
+        /// </summary>
+        public int AssetBundleCount { get; private set; }
+
+        private string _searchedManifestFileName;
+
+        /// <summary>
+        /// Create a new AssetBundleFolder for a given path (which is then immutable).
+        /// Call <see cref="Refresh"/> to update the folder state and texture compression format targeting.
+        /// </summary>
+        public AssetBundleFolder(string folderPath)
+        {
+            AssetBundleCount = 0;
+            FolderPath = folderPath;
+        }
+
+        /// <summary>
+        /// Update the folder state and texture compression format targeting, if any.
+        /// </summary>
+        /// <returns>true if the refresh was properly done (no errors)</returns>
+        public bool Refresh()
+        {
+            var directoryInfo = new DirectoryInfo(FolderPath);
+            if (!directoryInfo.Exists)
+            {
+                AssetBundleCount = 0;
+                State = AssetPackFolderState.FolderMissing;
+                return false;
+            }
+
+            var files = directoryInfo.GetFiles();
+            if (files.Length == 0)
+            {
+                AssetBundleCount = 0;
+                State = AssetPackFolderState.FolderEmpty;
+                return false;
+            }
+
+            TextureCompressionFormat textureCompressionFormat;
+            TextureTargetingTools.GetTextureCompressionFormatAndStripSuffix(
+                directoryInfo.Name,
+                out textureCompressionFormat,
+                out _searchedManifestFileName);
+            TextureCompressionFormat = textureCompressionFormat;
+
+            return true;
+        }
+
+        /// <summary>
+        /// Scans and returns every <see cref="AssetBundleVariant"/> found in this folder.
+        /// </summary>
+        public IDictionary<string, AssetBundleVariant> ExtractAssetBundleVariant()
+        {
+            AssetBundleCount = 0;
+            var assetBundleVariants = new Dictionary<string, AssetBundleVariant>();
+            if (!Refresh())
+            {
+                return assetBundleVariants;
+            }
+
+            var directoryInfo = new DirectoryInfo(FolderPath);
+            var files = directoryInfo.GetFiles();
+
+            var fileDictionary = files.ToDictionary(file => file.Name, file => file);
+
+            // Look for an AssetBundle file with the same name as the directory that contains it.
+            // This AssetBundle file contains a single asset, which is of type AssetBundleManifest.
+            // See https://unity3d.com/learn/tutorials/topics/best-practices/assetbundle-fundamentals
+            FileInfo manifestFileInfo;
+            if (!fileDictionary.TryGetValue(_searchedManifestFileName, out manifestFileInfo))
+            {
+                State = AssetPackFolderState.ManifestFileMissing;
+                return assetBundleVariants;
+            }
+
+            var manifestFilePath = manifestFileInfo.FullName;
+            AssetBundle manifestAssetBundle;
+            try
+            {
+                manifestAssetBundle = AssetBundle.LoadFromFile(manifestFilePath);
+            }
+            catch (Exception ex)
+            {
+                Debug.LogErrorFormat("Exception loading AssetBundle file containing manifest ({0}): {1}",
+                    manifestFilePath, ex);
+                State = AssetPackFolderState.ManifestFileLoadError;
+                return assetBundleVariants;
+            }
+
+            try
+            {
+                var manifest = manifestAssetBundle.LoadAsset<AssetBundleManifest>("AssetBundleManifest");
+                if (manifest == null)
+                {
+                    State = AssetPackFolderState.ManifestAssetMissing;
+                    return assetBundleVariants;
+                }
+
+                var allAssetBundles = manifest.GetAllAssetBundles();
+                if (allAssetBundles.Length == 0)
+                {
+                    State = AssetPackFolderState.AssetBundlesMissing;
+                    return assetBundleVariants;
+                }
+
+                foreach (var assetBundleName in allAssetBundles)
+                {
+                    FileInfo assetBundleFileInfo;
+                    var fileSizeBytes = fileDictionary.TryGetValue(assetBundleName, out assetBundleFileInfo)
+                        ? assetBundleFileInfo.Length
+                        : AssetBundleVariant.FileSizeIfMissing;
+
+                    assetBundleVariants.Add(
+                        assetBundleName,
+                        AssetBundleVariant.CreateVariant(
+                            assetBundleName,
+                            fileSizeBytes,
+                            manifest.GetDirectDependencies(assetBundleName),
+                            manifest.GetAllDependencies(assetBundleName),
+                            Path.Combine(FolderPath, assetBundleName)));
+                }
+
+                AssetBundleCount = assetBundleVariants.Count;
+                return assetBundleVariants;
+            }
+            catch (Exception ex)
+            {
+                Debug.LogErrorFormat(
+                    "Exception loading AssetBundleManifest from AssetBundle ({0}): {1}", manifestFilePath, ex);
+                State = AssetPackFolderState.ManifestAssetLoadError;
+                return assetBundleVariants;
+            }
+            finally
+            {
+                // If an AssetBundle isn't unloaded, the Editor will have to be restarted to load it again.
+                manifestAssetBundle.Unload(true);
+            }
+        }
+    }
+}

Assets/GooglePlayPlugins/com.google.android.appbundle/Editor/Scripts/Internal/AssetPacks/AssetBundleFolder.cs.meta

@@ -0,0 +1,12 @@
+fileFormatVersion: 2
+guid: 2c3bd268718fc41b48090fadb8eee0bd
+timeCreated: 1548906103
+licenseType: Pro
+MonoImporter:
+  serializedVersion: 2
+  defaultReferences: []
+  executionOrder: 0
+  icon: {instanceID: 0}
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: 

Assets/GooglePlayPlugins/com.google.android.appbundle/Editor/Scripts/Internal/AssetPacks/AssetBundlePack.cs

@@ -0,0 +1,170 @@
+// Copyright 2019 Google LLC
+//
+// 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.
+
+using System.Collections.Generic;
+using System.Linq;
+using Google.Android.AppBundle.Editor.Internal.Utils;
+using UnityEngine;
+
+namespace Google.Android.AppBundle.Editor.Internal.AssetPacks
+{
+    /// <summary>
+    /// Internal-only wrapper around <see cref="AssetBundleVariant"/>s that are identical except for their
+    /// texture compression formats.
+    /// </summary>
+    public class AssetBundlePack
+    {
+        /// <summary>
+        /// The name of the asset pack, which is the same as the name of every included AssetBundle.
+        /// </summary>
+        public readonly string Name;
+
+        /// <summary>
+        /// Indicates whether this pack will be included in an Android App Bundle, and if so how it is delivered.
+        /// </summary>
+        public AssetPackDeliveryMode DeliveryMode;
+
+        /// <summary>
+        /// The AssetBundles, all with the same name but generated for different texture compression formats.
+        /// </summary>
+        public IDictionary<TextureCompressionFormat, AssetBundleVariant> Variants { get; private set; }
+
+        /// <summary>
+        /// If non-empty, these errors will prevent this AssetBundlePack from being packaged in an App Bundle.
+        /// </summary>
+        public readonly HashSet<AssetPackError> Errors = new HashSet<AssetPackError>();
+
+        /// <summary>
+        /// Constructor.
+        /// </summary>
+        public AssetBundlePack(string name, AssetPackDeliveryMode deliveryMode)
+        {
+            Name = name;
+            DeliveryMode = deliveryMode;
+            Variants = new Dictionary<TextureCompressionFormat, AssetBundleVariant>();
+        }
+
+        /// <summary>
+        /// Adds an <see cref="AssetBundleVariant"/> to this asset pack.
+        /// <returns>true if the AssetBundle was added, false if another AssetBundle with the same compression
+        /// is already present.</returns>
+        /// </summary>
+        public bool Add(TextureCompressionFormat textureCompressionFormat, AssetBundleVariant variant)
+        {
+            AssetBundleVariant existingVariant;
+            if (Variants.TryGetValue(textureCompressionFormat, out existingVariant))
+            {
+                Debug.LogErrorFormat("Multiple AssetBundles for texture format {0} are used for {1}.",
+                    textureCompressionFormat.ToString(), Name);
+                existingVariant.Errors.Add(AssetPackError.DuplicateName);
+                return false;
+            }
+
+            Variants.Add(textureCompressionFormat, variant);
+            return true;
+        }
+
+        /// <summary>
+        /// Adds the specified error to all children.
+        /// </summary>
+        public void AddErrorToVariants(AssetPackError error)
+        {
+            foreach (var assetPack in Variants.Values)
+            {
+                assetPack.Errors.Add(error);
+            }
+        }
+
+        /// <summary>
+        /// The names of any AssetBundles that the AssetBundles inside this AssetBundlePack directly depend on.
+        /// </summary>
+        public IList<string> DirectDependencies
+        {
+            get
+            {
+                var directDependencies =
+                    Variants.Values.SelectMany(pack => pack.DirectDependencies).Distinct().ToList();
+                directDependencies.Sort();
+                return directDependencies;
+            }
+        }
+
+        /// <summary>
+        /// A UI friendly way of displaying the error with this AssetBundlePack (if one) or the number of errors
+        /// (if more than one). If there are no errors, returns null.
+        /// </summary>
+        public string ErrorSummary
+        {
+            get
+            {
+                switch (Errors.Count)
+                {
+                    case 0:
+                        return null;
+                    case 1:
+                        return NameAndDescriptionAttribute.GetAttribute(Errors.First()).Name;
+                    default:
+                        return Errors.Count + " Errors";
+                }
+            }
+        }
+
+        /// <summary>
+        /// Delegate to find an AssetBundlePack when doing the dependencies check.
+        /// </summary>
+        /// <param name="name">The name of the other AssetBundlePack.</param>
+        /// <param name="assetBundlePack">If found, will contain the AssetBundlePack.</param>
+        public delegate bool TryGetAssetBundlePack(string name, out AssetBundlePack assetBundlePack);
+
+        /// <summary>
+        /// Evaluates whether to set any <see cref="Errors"/> based on problems with the dependencies.
+        /// </summary>
+        /// <param name="tryGetAssetBundlePack">Function to get an <see cref="AssetBundlePack"/> given its name.</param>
+        public void CheckDependencyErrors(TryGetAssetBundlePack tryGetAssetBundlePack)
+        {
+            if (DeliveryMode == AssetPackDeliveryMode.DoNotPackage)
+            {
+                return;
+            }
+
+            foreach (var variant in Variants)
+            {
+                var textureCompressionFormat = variant.Key;
+                var assetPack = variant.Value;
+                assetPack.CheckDependencyErrors(
+                    DeliveryMode,
+                    TryGetDependency(tryGetAssetBundlePack, textureCompressionFormat));
+            }
+        }
+
+        private static AssetBundleVariant.TryGetDependency TryGetDependency(
+            TryGetAssetBundlePack tryGetAssetBundlePack, TextureCompressionFormat textureCompressionFormat)
+        {
+            return (string name, out AssetBundleVariant dependency, out AssetPackDeliveryMode deliveryMode) =>
+            {
+                deliveryMode = AssetPackDeliveryMode.DoNotPackage;
+                dependency = null;
+                AssetBundlePack assetBundlePack;
+                if (tryGetAssetBundlePack(name, out assetBundlePack) &&
+                    assetBundlePack.Variants.TryGetValue(textureCompressionFormat, out dependency))
+                {
+                    deliveryMode = assetBundlePack.DeliveryMode;
+                    return true;
+                }
+
+                return false;
+            };
+        }
+    }
+}

Assets/GooglePlayPlugins/com.google.android.appbundle/Editor/Scripts/Internal/AssetPacks/AssetBundlePack.cs.meta

@@ -0,0 +1,3 @@
+fileFormatVersion: 2
+guid: 20e43cae4a4245538a68b920730857b6
+timeCreated: 1571324952

Assets/GooglePlayPlugins/com.google.android.appbundle/Editor/Scripts/Internal/AssetPacks/AssetBundleVariant.cs

@@ -0,0 +1,206 @@
+// Copyright 2019 Google LLC
+//
+// 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.
+
+using System.Collections.Generic;
+using System.Linq;
+using Google.Android.AppBundle.Editor.Internal.Utils;
+
+namespace Google.Android.AppBundle.Editor.Internal.AssetPacks
+{
+    /// <summary>
+    /// Internal-only wrapper around an AssetBundle that by virtue of its texture compression format is a
+    /// variant of the other AssetBundles contained in an <see cref="AssetBundlePack"/>.
+    /// </summary>
+    public class AssetBundleVariant
+    {
+        /// <summary>
+        /// Special value for <see cref="FileSizeBytes"/> indicating the AssetBundle file does not exist.
+        /// </summary>
+        public const long FileSizeIfMissing = -1L;
+
+        // Visible for testing.
+        public const string FileMissingText = "file missing";
+
+        // Visible for testing.
+        public const string NoneText = "none";
+
+        private static readonly string[] EmptyStringArray = new string[0];
+
+        /// <summary>
+        /// Constructor. Prefer <see cref="CreateVariant"/> for all cases except deserialization and testing.
+        /// </summary>
+        public AssetBundleVariant()
+        {
+            DirectDependencies = EmptyStringArray;
+            AllDependencies = EmptyStringArray;
+        }
+
+        /// <summary>
+        /// If non-empty, these errors will prevent this AssetBundle from being packaged in an app bundle.
+        /// </summary>
+        public readonly HashSet<AssetPackError> Errors = new HashSet<AssetPackError>();
+
+        /// <summary>
+        /// The names of any AssetBundles that this one directly depends on.
+        /// </summary>
+        public string[] DirectDependencies { get; private set; }
+
+        /// <summary>
+        /// The names of any AssetBundles that this one directly or transitively depends on.
+        /// </summary>
+        public string[] AllDependencies { get; private set; }
+
+        /// <summary>
+        /// The size of the file in bytes, or -1L if the file doesn't exist.
+        /// </summary>
+        public long FileSizeBytes { get; private set; }
+
+        /// <summary>
+        /// The path to the AssetBundle represented by this wrapper.
+        /// </summary>
+        public string Path { get; private set; }
+
+        /// <summary>
+        /// A UI friendly way of displaying dependency info.
+        /// </summary>
+        public string DependenciesText
+        {
+            // TODO: consider how to handle an extra long string in the UI.
+            get { return DirectDependencies.Length == 0 ? NoneText : string.Join(", ", DirectDependencies); }
+        }
+
+        /// <summary>
+        /// A UI friendly way of displaying file size or that the file doesn't exist on disk.
+        /// </summary>
+        public string FileSizeText
+        {
+            get
+            {
+                // Display file size in Kibibytes using "JEDEC" standard. See https://en.wikipedia.org/wiki/Kilobyte
+                return FileSizeBytes == FileSizeIfMissing ? FileMissingText : (FileSizeBytes / 1024) + " KB";
+            }
+        }
+
+        /// <summary>
+        /// A UI friendly way of displaying the error with this AssetBundle (if there is one) or the number of errors
+        /// (if there is more than one). If there are no errors, this is null.
+        /// </summary>
+        public string ErrorSummary
+        {
+            get
+            {
+                switch (Errors.Count)
+                {
+                    case 0:
+                        return null;
+                    case 1:
+                        return NameAndDescriptionAttribute.GetAttribute(Errors.First()).Name;
+                    default:
+                        return Errors.Count + " Errors";
+                }
+            }
+        }
+
+        /// <summary>
+        /// Delegate to find a variant when doing the dependencies check.
+        /// See <see cref="AssetBundleVariant.CheckDependencyErrors"/>.
+        /// </summary>
+        /// <param name="name">The asset pack to search.</param>
+        /// <param name="dependencyVariant">If found, will contain the searched asset pack.</param>
+        /// <param name="dependencyDeliveryMode">If found, will contain the delivery mode of the searched asset pack.</param>
+        /// <returns>true if the asset pack was found, false otherwise.</returns>
+        public delegate bool TryGetDependency(string name, out AssetBundleVariant dependencyVariant,
+            out AssetPackDeliveryMode dependencyDeliveryMode);
+
+        /// <summary>
+        /// Evaluates whether to set any <see cref="Errors"/> based on problems with this variant's dependencies.
+        /// </summary>
+        /// <param name="deliveryMode">The delivery mode of this asset pack.</param>
+        /// <param name="tryGetDependency">A function returning the asset pack for the given dependency name,
+        /// along with the delivery mode of the asset pack.</param>
+        public void CheckDependencyErrors(AssetPackDeliveryMode deliveryMode, TryGetDependency tryGetDependency)
+        {
+            if (deliveryMode == AssetPackDeliveryMode.DoNotPackage)
+            {
+                return;
+            }
+
+            foreach (var dependencyName in AllDependencies)
+            {
+                AssetBundleVariant dependencyVariant;
+                AssetPackDeliveryMode dependencyDeliveryMode;
+                if (!tryGetDependency(dependencyName, out dependencyVariant, out dependencyDeliveryMode))
+                {
+                    Errors.Add(AssetPackError.DependencyMissing);
+                    continue;
+                }
+
+                if (dependencyVariant.Errors.Count > 0)
+                {
+                    Errors.Add(AssetPackError.DependencyError);
+                }
+
+                // If this asset pack is marked for delivery, all of its dependencies must be packaged for delivery.
+                if (dependencyDeliveryMode == AssetPackDeliveryMode.DoNotPackage)
+                {
+                    Errors.Add(AssetPackError.DependencyNotPackaged);
+                    continue;
+                }
+
+                // An asset pack cannot have dependencies on asset packs with later delivery modes,
+                // e.g. A FastFollow asset pack cannot depend on an OnDemand asset pack.
+                if (deliveryMode < dependencyDeliveryMode)
+                {
+                    Errors.Add(AssetPackError.DependencyIncompatibleDelivery);
+                }
+            }
+        }
+
+        /// <summary>
+        /// Creates a new <see cref="AssetBundleVariant"/>. Evaluates some conditions and may set <see cref="Errors"/>.
+        /// </summary>
+        /// <param name="assetBundleName">Name of the AssetBundle represented by this variant.</param>
+        /// <param name="fileSizeBytes">Size of the file in bytes, or <see cref="FileSizeIfMissing"/>.</param>
+        /// <param name="directDependencies">AssetBundles that are direct dependencies of this one.</param>
+        /// <param name="allDependencies">AssetBundles that are direct or transitive dependencies of this one.</param>
+        /// <param name="path">The path to the AssetBundle represented by this variant.</param>
+        public static AssetBundleVariant CreateVariant(
+            string assetBundleName,
+            long fileSizeBytes,
+            string[] directDependencies,
+            string[] allDependencies,
+            string path)
+        {
+            var variant = new AssetBundleVariant
+            {
+                DirectDependencies = directDependencies ?? EmptyStringArray,
+                AllDependencies = allDependencies ?? EmptyStringArray,
+                FileSizeBytes = fileSizeBytes,
+                Path = path,
+            };
+
+            if (fileSizeBytes == FileSizeIfMissing)
+            {
+                variant.Errors.Add(AssetPackError.FileMissing);
+            }
+
+            if (!AndroidAppBundle.IsValidModuleName(assetBundleName))
+            {
+                variant.Errors.Add(AssetPackError.InvalidName);
+            }
+
+            return variant;
+        }
+    }
+}

Assets/GooglePlayPlugins/com.google.android.appbundle/Editor/Scripts/Internal/AssetPacks/AssetBundleVariant.cs.meta

@@ -0,0 +1,12 @@
+fileFormatVersion: 2
+guid: 6c348752fa8c94d3a8f6f085846aa228
+timeCreated: 1548906103
+licenseType: Pro
+MonoImporter:
+  serializedVersion: 2
+  defaultReferences: []
+  executionOrder: 0
+  icon: {instanceID: 0}
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: 

Assets/GooglePlayPlugins/com.google.android.appbundle/Editor/Scripts/Internal/AssetPacks/AssetDeliveryConfig.cs

@@ -0,0 +1,251 @@
+// Copyright 2019 Google LLC
+//
+// 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.
+
+using System.Collections.Generic;
+using System.Linq;
+using Google.Android.AppBundle.Editor.Internal.Config;
+using UnityEditor;
+using UnityEngine;
+
+namespace Google.Android.AppBundle.Editor.Internal.AssetPacks
+{
+    /// <summary>
+    /// Internal-only representation of asset packs being considered for packaging in an Android App Bundle.
+    /// </summary>
+    public class AssetDeliveryConfig
+    {
+        /// <summary>
+        /// Default texture compression format for building standalone APKs for Android pre-Lollipop devices.
+        /// </summary>
+        public TextureCompressionFormat DefaultTextureCompressionFormat = TextureCompressionFormat.Default;
+
+        /// <summary>
+        /// Whether to split the assets in an AAB's base module into a separate install-time asset pack.
+        /// </summary>
+        public bool SplitBaseModuleAssets;
+
+        /// <summary>
+        /// Dictionary from a folder path to a AssetBundleFolder object describing the folder's contents.
+        /// </summary>
+        public readonly IDictionary<string, AssetBundleFolder> Folders =
+            new SortedDictionary<string, AssetBundleFolder>();
+
+        /// <summary>
+        /// Dictionary from AssetBundle name to AssetBundlePacks.
+        /// </summary>
+        public IDictionary<string, AssetBundlePack> AssetBundlePacks { get; private set; }
+
+        // TODO(b/150701341): add support for managing this type of asset pack in the UI.
+        public List<SerializableAssetPack> rawAssetsPacks;
+
+        private readonly IEnumerable<IAssetPackValidator> _packValidators;
+
+        public AssetDeliveryConfig()
+        {
+            AssetBundlePacks = new Dictionary<string, AssetBundlePack>();
+            _packValidators = AssetPackValidatorRegistry.Registry.ConstructInstances();
+        }
+
+        /// <summary>
+        /// Updates the in-memory state based on the AssetBundles on disk.
+        /// </summary>
+        public void Refresh()
+        {
+            // Refresh the AssetBundlePacks according to AssetBundles contained in folders.
+            RefreshAssetBundlePacks();
+
+            // Check for errors.
+            foreach (var assetBundlePack in AssetBundlePacks.Values)
+            {
+                CheckBuildTypeErrors(assetBundlePack);
+                assetBundlePack.CheckDependencyErrors(
+                    (string name, out AssetBundlePack pack) => AssetBundlePacks.TryGetValue(name, out pack));
+            }
+        }
+
+        /// <summary>
+        /// Potentially refresh all folders and/or add and remove the specified folders.
+        /// </summary>
+        /// <returns>true if changes were made.</returns>
+        public bool UpdateAndRefreshFolders(bool refreshFolders, List<string> foldersToAdd,
+            List<string> foldersToRemove)
+        {
+            if (!refreshFolders && foldersToRemove.Count == 0 && foldersToAdd.Count == 0)
+            {
+                return false;
+            }
+
+            foreach (var folder in foldersToAdd)
+            {
+                if (Folders.ContainsKey(folder))
+                {
+                    Debug.LogWarningFormat("Skipping folder \"{0}\" because it is already in the list.", folder);
+                }
+                else
+                {
+                    Folders.Add(folder, new AssetBundleFolder(folder));
+                }
+            }
+
+            foreach (var folder in foldersToRemove)
+            {
+                Folders.Remove(folder);
+            }
+
+            Refresh();
+            return true;
+        }
+
+        /// <summary>
+        /// Return a list of error messages that are applicable to AssetBundles marked for packaging/delivery
+        /// along with the number of AssetBundles that are marked for packaging/delivery.
+        /// </summary>
+        public List<string> GetPackagingErrorMessages(out int numAssetPacksToDeliver)
+        {
+            // Check for errors in asset packs
+            numAssetPacksToDeliver = 0;
+            var errors = new List<string>();
+
+            foreach (var assetBundlePack in AssetBundlePacks.Values)
+            {
+                if (assetBundlePack.DeliveryMode == AssetPackDeliveryMode.DoNotPackage)
+                {
+                    continue;
+                }
+
+                var errorSummary = assetBundlePack.ErrorSummary;
+                if (errorSummary != null)
+                {
+                    errors.Add(string.Format(
+                        "Unable to package AssetBundle pack \"{0}\" because {1}.",
+                        assetBundlePack.Name, errorSummary.ToLower()));
+                }
+
+                numAssetPacksToDeliver++;
+                foreach (var variant in assetBundlePack.Variants.Values)
+                {
+                    var variantErrorSummary = variant.ErrorSummary;
+                    if (variantErrorSummary != null)
+                    {
+                        errors.Add(string.Format(
+                            "Unable to package AssetBundle \"{0}\" because {1}.",
+                            variant.Path, variantErrorSummary.ToLower()));
+                    }
+                }
+            }
+
+            // Check for errors in the rest of the configuration.
+            if (HasTextureCompressionFormatTargeting() &&
+                !GetAllTextureCompressionFormats().Contains(DefaultTextureCompressionFormat))
+            {
+                errors.Add(string.Format(
+                    "The default texture compression format ({0}) is not used by any AssetBundles.",
+                    DefaultTextureCompressionFormat.ToString()));
+            }
+
+            // TODO: think about moving to a build check.
+            if (HasTextureCompressionFormatTargeting() &&
+                EditorUserBuildSettings.androidBuildSubtarget != MobileTextureSubtarget.Generic)
+            {
+                errors.Add(string.Format(
+                    "Texture Compression in the Build Settings for Android is set to \"{0}\". This is not compatible with asset packs having targeted textures. Set the texture compression in the Build Settings for Android to \"Don't override'\" before continuing.",
+                    EditorUserBuildSettings.androidBuildSubtarget));
+            }
+
+            return errors;
+        }
+
+        /// <summary>
+        /// Refresh the list of all the <see cref="AssetBundlePacks"/> represented by the folders.
+        /// </summary>
+        public void RefreshAssetBundlePacks()
+        {
+            var assetBundlePacks = new Dictionary<string, AssetBundlePack>();
+            foreach (var folder in Folders.Values)
+            {
+                var assetPacks = folder.ExtractAssetBundleVariant();
+
+                foreach (var targetedAssetPackPair in assetPacks)
+                {
+                    var targetedAssetPackName = targetedAssetPackPair.Key;
+                    var targetedAssetPack = targetedAssetPackPair.Value;
+
+                    AssetBundlePack assetBundlePack;
+                    if (!assetBundlePacks.TryGetValue(targetedAssetPackName, out assetBundlePack))
+                    {
+                        var deliveryMode = GetMultiTargetingAssetPackDeliveryMode(targetedAssetPackName);
+                        assetBundlePack = new AssetBundlePack(targetedAssetPackName, deliveryMode);
+                        assetBundlePacks.Add(targetedAssetPackName, assetBundlePack);
+                    }
+
+                    if (!assetBundlePack.Add(folder.TextureCompressionFormat, targetedAssetPack))
+                    {
+                        assetBundlePack.Errors.Add(AssetPackError.DuplicateName);
+                    }
+                }
+            }
+
+            AssetBundlePacks = assetBundlePacks;
+        }
+
+        /// <summary>
+        /// Returns the delivery mode for the AssetBundlePack with the given name, or DoNotPackage if not found.
+        /// </summary>
+        private AssetPackDeliveryMode GetMultiTargetingAssetPackDeliveryMode(string multiTargetingAssetPackName)
+        {
+            AssetBundlePack assetBundlePack;
+            if (AssetBundlePacks.TryGetValue(multiTargetingAssetPackName, out assetBundlePack))
+            {
+                return assetBundlePack.DeliveryMode;
+            }
+
+            return AssetPackDeliveryMode.DoNotPackage;
+        }
+
+        /// <summary>
+        /// Returns all texture compression formats used by asset packs.
+        /// </summary>
+        public IEnumerable<TextureCompressionFormat> GetAllTextureCompressionFormats()
+        {
+            return AssetBundlePacks.Values.SelectMany(
+                multiTargetingAssetPack => multiTargetingAssetPack.Variants.Keys).Distinct();
+        }
+
+        /// <summary>
+        /// Check if some asset packs are using targeted texture compression format.
+        /// </summary>
+        public bool HasTextureCompressionFormatTargeting()
+        {
+            return GetAllTextureCompressionFormats().Any(textureCompressionFormat =>
+                textureCompressionFormat != TextureCompressionFormat.Default);
+        }
+
+        /// <summary>
+        /// Checks the specified bundlePack for build errors using validators registered in AssetPackValidatorRegistry.
+        /// </summary>
+        private void CheckBuildTypeErrors(AssetBundlePack bundlePack)
+        {
+            var buildErrors = new HashSet<AssetPackError>();
+            foreach (var buildValidator in _packValidators)
+            {
+                buildErrors.UnionWith(buildValidator.CheckBuildErrors(bundlePack));
+            }
+
+            foreach (var error in buildErrors)
+            {
+                bundlePack.AddErrorToVariants(error);
+            }
+        }
+    }
+}

Assets/GooglePlayPlugins/com.google.android.appbundle/Editor/Scripts/Internal/AssetPacks/AssetDeliveryConfig.cs.meta

@@ -0,0 +1,12 @@
+fileFormatVersion: 2
+guid: bdc061489f3c64fd78ed0cefe895b007
+timeCreated: 1549914493
+licenseType: Pro
+MonoImporter:
+  serializedVersion: 2
+  defaultReferences: []
+  executionOrder: 0
+  icon: {instanceID: 0}
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: 

Assets/GooglePlayPlugins/com.google.android.appbundle/Editor/Scripts/Internal/AssetPacks/AssetDeliveryConfigSerializer.cs

@@ -0,0 +1,111 @@
+// Copyright 2019 Google LLC
+//
+// 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.
+
+using System.Collections.Generic;
+using System.IO;
+using System.Linq;
+using Google.Android.AppBundle.Editor.Internal.Config;
+using UnityEngine;
+
+namespace Google.Android.AppBundle.Editor.Internal.AssetPacks
+{
+    /// <summary>
+    /// Provides methods for serializing <see cref="AssetDeliveryConfig"/> to a JSON file and for deserializing it.
+    /// </summary>
+    public static class AssetDeliveryConfigSerializer
+    {
+        /// <summary>
+        /// Save the specified AssetDeliveryConfig config to disk.
+        /// </summary>
+        public static void SaveConfig(AssetDeliveryConfig assetDeliveryConfig)
+        {
+            Debug.LogFormat("Saving {0}", SerializationHelper.ConfigurationFilePath);
+            var config = Serialize(assetDeliveryConfig);
+            var jsonText = JsonUtility.ToJson(config);
+            File.WriteAllText(SerializationHelper.ConfigurationFilePath, jsonText);
+        }
+
+        /// <summary>
+        /// Returns an AssetDeliveryConfig loaded from disk.
+        /// </summary>
+        public static AssetDeliveryConfig LoadConfig()
+        {
+            Debug.LogFormat("Loading {0}", SerializationHelper.ConfigurationFilePath);
+            SerializableAssetPackConfig config;
+            if (File.Exists(SerializationHelper.ConfigurationFilePath))
+            {
+                var jsonText = File.ReadAllText(SerializationHelper.ConfigurationFilePath);
+                config = JsonUtility.FromJson<SerializableAssetPackConfig>(jsonText);
+            }
+            else
+            {
+                config = new SerializableAssetPackConfig();
+            }
+
+            return Deserialize(config);
+        }
+
+        private static SerializableAssetPackConfig Serialize(AssetDeliveryConfig assetDeliveryConfig)
+        {
+            var config = new SerializableAssetPackConfig
+            {
+                DefaultTextureCompressionFormat = assetDeliveryConfig.DefaultTextureCompressionFormat,
+                splitBaseModuleAssets = assetDeliveryConfig.SplitBaseModuleAssets
+            };
+
+            foreach (var assetPack in assetDeliveryConfig.AssetBundlePacks.Values)
+            {
+                config.assetBundles.Add(new SerializableMultiTargetingAssetBundle
+                {
+                    name = assetPack.Name,
+                    DeliveryMode = assetPack.DeliveryMode,
+                    assetBundles = assetPack.Variants.Select(pack => new SerializableAssetBundle
+                    {
+                        path = pack.Value.Path,
+                        TextureCompressionFormat = pack.Key
+                    }).ToList()
+                });
+            }
+
+            config.assetPacks = assetDeliveryConfig.rawAssetsPacks;
+
+            return config;
+        }
+
+        private static AssetDeliveryConfig Deserialize(SerializableAssetPackConfig config)
+        {
+            var assetDeliveryConfig = new AssetDeliveryConfig
+            {
+                DefaultTextureCompressionFormat = config.DefaultTextureCompressionFormat,
+                SplitBaseModuleAssets = config.splitBaseModuleAssets
+            };
+
+            var paths = new HashSet<string>();
+            foreach (var multiTargetingAssetBundle in config.assetBundles)
+            {
+                paths.UnionWith(
+                    multiTargetingAssetBundle.assetBundles.Select(item => Path.GetDirectoryName(item.path)));
+                assetDeliveryConfig.AssetBundlePacks.Add(multiTargetingAssetBundle.name,
+                    new AssetBundlePack(multiTargetingAssetBundle.name,
+                        multiTargetingAssetBundle.DeliveryMode));
+            }
+
+            paths.ToList().ForEach(path => assetDeliveryConfig.Folders.Add(path, new AssetBundleFolder(path)));
+
+            assetDeliveryConfig.rawAssetsPacks = config.assetPacks;
+
+            return assetDeliveryConfig;
+        }
+    }
+}

Assets/GooglePlayPlugins/com.google.android.appbundle/Editor/Scripts/Internal/AssetPacks/AssetDeliveryConfigSerializer.cs.meta

@@ -0,0 +1,12 @@
+fileFormatVersion: 2
+guid: f127ef3c767384ec89ad3e3aef7ae1bb
+timeCreated: 1548906103
+licenseType: Pro
+MonoImporter:
+  serializedVersion: 2
+  defaultReferences: []
+  executionOrder: 0
+  icon: {instanceID: 0}
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: 

Assets/GooglePlayPlugins/com.google.android.appbundle/Editor/Scripts/Internal/AssetPacks/AssetDeliveryWindow.cs

@@ -0,0 +1,399 @@
+// Copyright 2019 Google LLC
+//
+// 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.
+
+using System.Collections.Generic;
+using System.Linq;
+using Google.Android.AppBundle.Editor.Internal.Utils;
+using UnityEditor;
+using UnityEngine;
+
+namespace Google.Android.AppBundle.Editor.Internal.AssetPacks
+{
+    public class AssetDeliveryWindow : EditorWindow
+    {
+        /// <summary>
+        /// Label for the split base APK checkbox. Visible for referencing from error messages.
+        /// </summary>
+        public const string SeparateAssetsLabel = "Separate Base APK Assets";
+
+        private const string RefreshButtonText = "Refresh";
+        private const int WindowMinWidth = 610;
+        private const int WindowMinHeight = 300;
+        private const int ButtonWidth = 150;
+        private const int FieldWidth = 100;
+
+        private AssetDeliveryConfig _assetDeliveryConfig;
+        private Vector2 _scrollPosition;
+
+        /// <summary>
+        /// The names of asset packs that are shown collapsed.
+        /// </summary>
+        private HashSet<string> _collapsedAssetPacks;
+
+        /// <summary>
+        /// Displays this window, creating it if necessary.
+        /// </summary>
+        public static void ShowWindow()
+        {
+            var window = GetWindow(typeof(AssetDeliveryWindow), false, "Asset Delivery");
+            window.minSize = new Vector2(WindowMinWidth, WindowMinHeight);
+        }
+
+        private void OnGUI()
+        {
+            if (_assetDeliveryConfig == null)
+            {
+                _assetDeliveryConfig = AssetDeliveryConfigSerializer.LoadConfig();
+                _assetDeliveryConfig.Refresh();
+            }
+
+            if (_collapsedAssetPacks == null)
+            {
+                _collapsedAssetPacks = new HashSet<string>();
+            }
+
+            EditorGUILayout.Space();
+            EditorGUILayout.LabelField("Base APK Asset Delivery", EditorStyles.boldLabel);
+            RenderDescription(
+                "When building an Android App Bundle (AAB), automatically move assets that would normally be " +
+                "delivered in the base APK into an install-time asset pack. This option reduces base APK size " +
+                "similarly to the \"Split Application Binary\" publishing setting, but it uses Play Asset Delivery " +
+                "instead of APK Expansion (OBB) files, so it's compatible with AABs. This option is recommended for " +
+                "apps with a large base APK, e.g. over 150 MB.");
+            EditorGUILayout.BeginHorizontal();
+            EditorGUILayout.LabelField(SeparateAssetsLabel, GUILayout.Width(145));
+            var pendingSplitBaseModuleAssets = EditorGUILayout.Toggle(_assetDeliveryConfig.SplitBaseModuleAssets);
+            EditorGUILayout.EndHorizontal();
+            EditorGUILayout.Space();
+            EditorGUILayout.Space();
+
+            EditorGUILayout.LabelField("Asset Pack Configuration", EditorStyles.boldLabel);
+            RenderDescription(
+                "Add folders that directly contain AssetBundle files, for example the output folder from Unity's " +
+                "AssetBundle Browser. All AssetBundles directly contained in the specified folders will be displayed " +
+                "below. Update the \"Delivery Mode\" to include an AssetBundle in AAB builds.");
+            EditorGUILayout.Space();
+
+            // TODO(b/144677274): Remove this #if once TCF support is available in Play, to make TCF targeting discoverable.
+#if SHOW_TCF_IN_UI
+            if (_assetDeliveryConfig.Folders.Count != 0 && !_assetDeliveryConfig.HasTextureCompressionFormatTargeting())
+            {
+                // TODO(b/144677274): Add link to public documentation when available.
+                EditorGUILayout.HelpBox(
+                    "These AssetBundles don't specify texture compression format targeting. Generate additional " +
+                    "AssetBundles into folders ending with #tcf_xxx (e.g. AssetBundles#tcf_astc), and the " +
+                    "AssetBundles will be delivered to devices supporting that format.", MessageType.Info);
+                EditorGUILayout.Space();
+            }
+#endif
+
+            EditorGUILayout.BeginHorizontal();
+
+            // Store the changes and defer the actual update at the end to avoid modifications during rendering.
+            var refreshAssetDeliveryConfig = false;
+            var foldersToRemove = new List<string>();
+            var foldersToAdd = new List<string>();
+
+            if (GUILayout.Button("Add Folder...", GUILayout.Width(ButtonWidth)))
+            {
+                var folderPath = EditorUtility.OpenFolderPanel("Add Folder Containing AssetBundles", null, null);
+                if (string.IsNullOrEmpty(folderPath))
+                {
+                    // Assume cancelled.
+                    return;
+                }
+
+                if (_assetDeliveryConfig.Folders.ContainsKey(folderPath))
+                {
+                    var errorMessage =
+                        string.Format(
+                            "Cannot add a folder that has already been added. Use \"{0}\" to analyze existing folders.",
+                            RefreshButtonText);
+                    EditorUtility.DisplayDialog("Add Folder Error", errorMessage, WindowUtils.OkButtonText);
+                }
+                else
+                {
+                    foldersToAdd.Add(folderPath);
+                }
+            }
+
+            if (GUILayout.Button(RefreshButtonText, GUILayout.Width(ButtonWidth)))
+            {
+                refreshAssetDeliveryConfig = true;
+            }
+
+            if (GUILayout.Button("App Bundle Summary...", GUILayout.Width(ButtonWidth)))
+            {
+                _assetDeliveryConfig.Refresh();
+                EditorUtility.DisplayDialog("App Bundle Summary", GetPackagingSummary(), WindowUtils.OkButtonText);
+            }
+
+            EditorGUILayout.EndHorizontal();
+            EditorGUILayout.Space();
+
+            // Hide this setting for projects targeting SDK 21+ since it only affects install-time asset pack
+            // installation on older devices.
+            if (_assetDeliveryConfig.HasTextureCompressionFormatTargeting() &&
+                TextureTargetingTools.IsSdkVersionPreLollipop(PlayerSettings.Android.minSdkVersion))
+            {
+                EditorGUILayout.LabelField("Texture Compression Configuration", EditorStyles.boldLabel);
+                EditorGUILayout.Space();
+
+                bool targetingUpdated;
+                RenderTextureCompressionFormatTargetingConfiguration(_assetDeliveryConfig, out targetingUpdated);
+                refreshAssetDeliveryConfig |= targetingUpdated;
+            }
+
+            _scrollPosition = EditorGUILayout.BeginScrollView(_scrollPosition);
+
+            EditorGUILayout.LabelField("AssetBundle Folders", EditorStyles.boldLabel);
+            EditorGUILayout.Space();
+            foreach (var folderPair in _assetDeliveryConfig.Folders)
+            {
+                var folderPath = folderPair.Key;
+                bool removeFolder;
+                RenderFolder(folderPath, folderPair.Value, out removeFolder);
+                if (removeFolder)
+                {
+                    foldersToRemove.Add(folderPath);
+                }
+            }
+
+            if (_assetDeliveryConfig.Folders.Count == 0)
+            {
+                EditorGUILayout.HelpBox("Add folders that directly contain AssetBundles.", MessageType.None);
+                EditorGUILayout.Space();
+            }
+            else
+            {
+                EditorGUILayout.LabelField("AssetBundle Configuration", EditorStyles.boldLabel);
+                EditorGUILayout.Space();
+                foreach (var assetBundlePack in _assetDeliveryConfig.AssetBundlePacks.Values)
+                {
+                    bool refreshFolder;
+                    RenderAssetBundlePack(assetBundlePack, out refreshFolder);
+                    refreshAssetDeliveryConfig |= refreshFolder;
+                }
+            }
+
+            EditorGUILayout.EndScrollView();
+
+            // Defer folder refresh, addition and removal to avoid modification of the collection while iterating.
+            var pendingConfigChanges =
+                _assetDeliveryConfig.UpdateAndRefreshFolders(refreshAssetDeliveryConfig, foldersToAdd, foldersToRemove);
+            pendingConfigChanges |= pendingSplitBaseModuleAssets != _assetDeliveryConfig.SplitBaseModuleAssets;
+            if (pendingConfigChanges)
+            {
+                _assetDeliveryConfig.SplitBaseModuleAssets = pendingSplitBaseModuleAssets;
+                AssetDeliveryConfigSerializer.SaveConfig(_assetDeliveryConfig);
+            }
+        }
+
+        private void RenderAssetBundlePack(AssetBundlePack assetBundlePack, out bool refreshFolder)
+        {
+            refreshFolder = false;
+
+#if UNITY_2019_1_OR_NEWER
+            var showGroupExpanded = !_collapsedAssetPacks.Contains(assetBundlePack.Name);
+            var groupExpanded =
+                EditorGUILayout.BeginFoldoutHeaderGroup(showGroupExpanded, assetBundlePack.Name);
+            if (groupExpanded)
+            {
+                _collapsedAssetPacks.Remove(assetBundlePack.Name);
+                RenderAssetBundlePackContent(assetBundlePack, out refreshFolder);
+            }
+            else
+            {
+                _collapsedAssetPacks.Add(assetBundlePack.Name);
+            }
+
+            EditorGUILayout.EndFoldoutHeaderGroup();
+#else
+            // Old Unity versions don't support foldable headers. Use a simple label instead.
+            EditorGUILayout.LabelField(assetBundlePack.Name, EditorStyles.boldLabel);
+            RenderAssetBundlePackContent(assetBundlePack, out refreshFolder);
+            EditorGUILayout.Separator();
+#endif
+        }
+
+        private static void RenderAssetBundlePackContent(AssetBundlePack assetBundlePack, out bool refreshFolder)
+        {
+            refreshFolder = false;
+
+            EditorGUI.BeginChangeCheck();
+            var newDeliveryMode =
+                (AssetPackDeliveryMode) EditorGUILayout.EnumPopup("Delivery Mode", assetBundlePack.DeliveryMode,
+                    GUILayout.Width(300));
+            if (EditorGUI.EndChangeCheck())
+            {
+                assetBundlePack.DeliveryMode = newDeliveryMode;
+
+                // Don't use a short-circuit evaluation one-liner to ensure EndChangeCheck() is called above.
+                refreshFolder = true;
+            }
+
+            // Display the direct dependencies of all the contained asset packs.
+            var directDependencies = assetBundlePack.DirectDependencies;
+            EditorGUILayout.BeginHorizontal();
+            EditorGUILayout.PrefixLabel("Dependencies");
+            GUILayout.TextArea(
+                directDependencies.Count > 0 ? string.Join(", ", directDependencies.ToArray()) : "None");
+            EditorGUILayout.EndHorizontal();
+
+            EditorGUILayout.LabelField("AssetBundles");
+            EditorGUI.indentLevel++;
+            foreach (var variant in assetBundlePack.Variants)
+            {
+                RenderVariant(variant.Value, variant.Key);
+            }
+
+            EditorGUI.indentLevel--;
+
+            EditorGUILayout.Space();
+        }
+
+        private static void RenderVariant(AssetBundleVariant variant, TextureCompressionFormat targeting)
+        {
+            EditorGUILayout.BeginHorizontal();
+
+            // TODO: revisit TextureCompressionFormat enum extension methods.
+            var targetingDescription = targeting == TextureCompressionFormat.Default
+                ? targeting.ToString()
+                : targeting.ToString().ToUpper();
+            EditorGUILayout.PrefixLabel(targetingDescription);
+
+            EditorGUILayout.LabelField(variant.FileSizeText, GUILayout.ExpandWidth(false));
+
+            var errors = variant.Errors;
+            if (errors.Count == 0)
+            {
+                EditorGUILayout.LabelField("No errors", GUILayout.ExpandWidth(true));
+            }
+            else
+            {
+                if (GUILayout.Button(variant.ErrorSummary + "...", GUILayout.ExpandWidth(true)))
+                {
+                    var errorDialogTitle = "AssetBundle Error" + (errors.Count == 1 ? string.Empty : "s");
+                    var errorDialogMessage = string.Join("\n\n",
+                        errors.Select(e => NameAndDescriptionAttribute.GetAttribute(e).Description).ToArray());
+                    EditorUtility.DisplayDialog(errorDialogTitle, errorDialogMessage, WindowUtils.OkButtonText);
+                }
+            }
+
+            EditorGUILayout.EndHorizontal();
+        }
+
+        private static void RenderFolder(string folderPath, AssetBundleFolder assetBundleFolder, out bool removeFolder)
+        {
+            // Folder path and associated management buttons.
+            EditorGUILayout.BeginHorizontal();
+            EditorGUILayout.LabelField(folderPath, EditorStyles.wordWrappedLabel);
+            removeFolder = GUILayout.Button("Remove", GUILayout.Width(FieldWidth));
+            EditorGUILayout.EndHorizontal();
+            EditorGUILayout.Space();
+
+            // Display the folder state.
+            if (assetBundleFolder.State == AssetPackFolderState.Ok)
+            {
+                EditorGUILayout.HelpBox(
+                    string.Format("Found {0} AssetBundle(s) in this folder", assetBundleFolder.AssetBundleCount),
+                    MessageType.None);
+            }
+            else
+            {
+                var errorMessage = NameAndDescriptionAttribute.GetAttribute(assetBundleFolder.State).Description;
+                EditorGUILayout.HelpBox(errorMessage, MessageType.Warning);
+            }
+
+            EditorGUILayout.Space();
+            EditorGUILayout.Space();
+        }
+
+        private static void RenderTextureCompressionFormatTargetingConfiguration(
+            AssetDeliveryConfig assetDeliveryConfig, out bool targetingUpdated)
+        {
+            targetingUpdated = false;
+            const string label = "Format for pre-L devices";
+            var width = GUILayout.Width(300);
+
+            EditorGUI.BeginChangeCheck();
+#if UNITY_2018_3_OR_NEWER
+            var validTextureCompressionFormats = assetDeliveryConfig.GetAllTextureCompressionFormats();
+            var newDefaultTextureCompressionFormat =
+                (TextureCompressionFormat) EditorGUILayout.EnumPopup(new GUIContent(label),
+                    assetDeliveryConfig.DefaultTextureCompressionFormat,
+                    textureCompressionFormat =>
+                        validTextureCompressionFormats.Contains((TextureCompressionFormat) textureCompressionFormat),
+                    false, width);
+#else
+            var newDefaultTextureCompressionFormat =
+                (TextureCompressionFormat) EditorGUILayout.EnumPopup(label,
+                    assetDeliveryConfig.DefaultTextureCompressionFormat, width);
+#endif
+            if (EditorGUI.EndChangeCheck())
+            {
+                assetDeliveryConfig.DefaultTextureCompressionFormat = newDefaultTextureCompressionFormat;
+                targetingUpdated = true;
+            }
+
+            EditorGUILayout.HelpBox(
+                "This compression format will be used for devices running Android 4.4.4 (SDK 20) or older. " +
+                "AssetBundles marked as install-time will be included in the APK generated for these devices. " +
+                "Android 5.0 (SDK 21) and newer devices aren't affected by this setting.",
+                MessageType.None);
+        }
+
+        private static void RenderDescription(string label)
+        {
+            var descriptionTextStyle = new GUIStyle(GUI.skin.label)
+            {
+                fontStyle = FontStyle.Italic,
+                wordWrap = true
+            };
+
+            EditorGUILayout.BeginVertical("textfield"); // Adds a light grey background.
+            EditorGUILayout.Space();
+            EditorGUILayout.LabelField(label, descriptionTextStyle);
+            EditorGUILayout.Space();
+            EditorGUILayout.EndVertical();
+        }
+
+        private string GetPackagingSummary()
+        {
+            int numAssetPacksToDeliver;
+            var errorMessages = _assetDeliveryConfig.GetPackagingErrorMessages(out numAssetPacksToDeliver);
+
+            if (numAssetPacksToDeliver == 0)
+            {
+                return _assetDeliveryConfig.SplitBaseModuleAssets
+                    ? "The Base APK's assets will be packaged in an asset pack."
+                    : "There are no AssetBundles marked for packaging.";
+            }
+
+            if (errorMessages.Count > 0)
+            {
+                const string separator = "\n\n- ";
+                return "The following error(s) will occur when building an Android App Bundle:" + separator +
+                       string.Join(separator, errorMessages.ToArray());
+            }
+
+            var description = numAssetPacksToDeliver == 1
+                ? "There is 1 AssetBundle marked for packaging."
+                : string.Format("There are {0} AssetBundles marked for packaging.", numAssetPacksToDeliver);
+            return _assetDeliveryConfig.SplitBaseModuleAssets
+                ? description + " Also, the Base APK's assets will be packaged in an asset pack."
+                : description;
+        }
+    }
+}

Assets/GooglePlayPlugins/com.google.android.appbundle/Editor/Scripts/Internal/AssetPacks/AssetDeliveryWindow.cs.meta

@@ -0,0 +1,12 @@
+fileFormatVersion: 2
+guid: 2fe34ebc6742d4f818529bc14c64c974
+timeCreated: 1548906103
+licenseType: Pro
+MonoImporter:
+  serializedVersion: 2
+  defaultReferences: []
+  executionOrder: 0
+  icon: {instanceID: 0}
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: 

Assets/GooglePlayPlugins/com.google.android.appbundle/Editor/Scripts/Internal/AssetPacks/AssetPackError.cs

@@ -0,0 +1,59 @@
+// Copyright 2019 Google LLC
+//
+// 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.
+
+using Google.Android.AppBundle.Editor.Internal.Utils;
+
+namespace Google.Android.AppBundle.Editor.Internal.AssetPacks
+{
+    /// <summary>
+    /// Describes various possible error states of an AssetPack.
+    /// </summary>
+    public enum AssetPackError
+    {
+        [NameAndDescription("Duplicate Name",
+            "AssetBundles with the same name and texture format exist in different folders. An " +
+            "AssetBundle's name and parent folder texture format must be unique.")]
+        DuplicateName,
+
+        [NameAndDescription("Invalid Name",
+            "A Play-delivered AssetBundle's name must start with an English letter and can only contain letters, " +
+            "numbers, and underscores. Please regenerate the AssetBundle with a new name.")]
+        InvalidName,
+
+        [NameAndDescription("Missing File", "An AssetBundle file with this name is missing from the folder.")]
+        FileMissing,
+
+        [NameAndDescription("Dependency Error", "One or more of this AssetBundle's dependencies has an error.")]
+        DependencyError,
+
+        [NameAndDescription("Missing Dependency", "One or more of this AssetBundle's dependencies is missing.")]
+        DependencyMissing,
+
+        [NameAndDescription("Dependency Not Packaged",
+            "This AssetBundle is marked for delivery, but one or more of its dependencies is not.")]
+        DependencyNotPackaged,
+
+        [NameAndDescription("Incompatible Dependency",
+            "This AssetBundle is marked to be delivered earlier than one or more of its dependencies.")]
+        DependencyIncompatibleDelivery,
+
+        [NameAndDescription("Instant Incompatible",
+            "Install-time asset packs aren't supported for instant apps.")]
+        InstallTimeAndInstant,
+
+        [NameAndDescription("Instant Incompatible",
+            "Fast-follow asset packs aren't supported for instant apps.")]
+        FastFollowAndInstant,
+    }
+}

Assets/GooglePlayPlugins/com.google.android.appbundle/Editor/Scripts/Internal/AssetPacks/AssetPackError.cs.meta

@@ -0,0 +1,12 @@
+fileFormatVersion: 2
+guid: 8cad3b640bc35422c88ba5dd808e4170
+timeCreated: 1549483271
+licenseType: Pro
+MonoImporter:
+  serializedVersion: 2
+  defaultReferences: []
+  executionOrder: 0
+  icon: {instanceID: 0}
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: 

Assets/GooglePlayPlugins/com.google.android.appbundle/Editor/Scripts/Internal/AssetPacks/AssetPackFolderState.cs

@@ -0,0 +1,52 @@
+// Copyright 2019 Google LLC
+//
+// 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.
+
+using Google.Android.AppBundle.Editor.Internal.Utils;
+
+namespace Google.Android.AppBundle.Editor.Internal.AssetPacks
+{
+    /// <summary>
+    /// Describes various possible states of a folder containing AssetBundle files.
+    /// </summary>
+    public enum AssetPackFolderState
+    {
+        // Does not need NameAndDescription attribute.
+        Ok,
+
+        [NameAndDescription("Folder Missing", "This folder does not exist.")]
+        FolderMissing,
+
+        [NameAndDescription("Folder Empty", "This folder contains no files.")]
+        FolderEmpty,
+
+        [NameAndDescription("Manifest File Missing",
+            "This folder is missing an AssetBundle file that matches the folder name.")]
+        ManifestFileMissing,
+
+        [NameAndDescription("Manifest File Load Error",
+            "There was an error loading the AssetBundle containing the AssetBundleManifest asset.")]
+        ManifestFileLoadError,
+
+        [NameAndDescription("AssetBundleManifest Missing",
+            "This folder's AssetBundle manifest file is missing the AssetBundleManifest asset.")]
+        ManifestAssetMissing,
+
+        [NameAndDescription("AssetBundleManifest Load Error",
+            "There was an error loading the AssetBundleManifest asset.")]
+        ManifestAssetLoadError,
+
+        [NameAndDescription("AssetBundle Files Missing", "This folder contains no AssetBundle files.")]
+        AssetBundlesMissing,
+    }
+}

Assets/GooglePlayPlugins/com.google.android.appbundle/Editor/Scripts/Internal/AssetPacks/AssetPackFolderState.cs.meta

@@ -0,0 +1,12 @@
+fileFormatVersion: 2
+guid: 0110294bad4d544c486274699623a0c2
+timeCreated: 1548906103
+licenseType: Pro
+MonoImporter:
+  serializedVersion: 2
+  defaultReferences: []
+  executionOrder: 0
+  icon: {instanceID: 0}
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: 

Assets/GooglePlayPlugins/com.google.android.appbundle/Editor/Scripts/Internal/AssetPacks/AssetPackValidatorRegistry.cs

@@ -0,0 +1,37 @@
+// Copyright 2020 Google LLC
+//
+// 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.
+
+namespace Google.Android.AppBundle.Editor.Internal.AssetPacks
+{
+    /// <summary>
+    /// Provides a <see cref="Registry"/> of <see cref="IAssetPackValidator"/>s.
+    /// </summary>
+    public class AssetPackValidatorRegistry : Registry<IAssetPackValidator>
+    {
+        private static AssetPackValidatorRegistry _instance;
+
+        public static AssetPackValidatorRegistry Registry
+        {
+            get
+            {
+                if (_instance == null)
+                {
+                    _instance = new AssetPackValidatorRegistry();
+                }
+
+                return _instance;
+            }
+        }
+    }
+}

Assets/GooglePlayPlugins/com.google.android.appbundle/Editor/Scripts/Internal/AssetPacks/AssetPackValidatorRegistry.cs.meta

@@ -0,0 +1,3 @@
+fileFormatVersion: 2
+guid: 4ad448820c8d482996636e3862c1a420
+timeCreated: 1574899929

Assets/GooglePlayPlugins/com.google.android.appbundle/Editor/Scripts/Internal/AssetPacks/IAssetPackValidator.cs

@@ -0,0 +1,29 @@
+// Copyright 2019 Google LLC
+//
+// 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.
+
+using System.Collections.Generic;
+
+namespace Google.Android.AppBundle.Editor.Internal.AssetPacks
+{
+    /// <summary>
+    /// Provides methods for validating whether an <see cref="AssetBundlePack"/> can be included in an app bundle.
+    /// </summary>
+    public interface IAssetPackValidator
+    {
+        /// <summary>
+        /// Returns a list of errors that would prevent the specified asset pack from being included in an app bundle.
+        /// </summary>
+        IList<AssetPackError> CheckBuildErrors(AssetBundlePack assetBundlePack);
+    }
+}

Assets/GooglePlayPlugins/com.google.android.appbundle/Editor/Scripts/Internal/AssetPacks/IAssetPackValidator.cs.meta

@@ -0,0 +1,3 @@
+fileFormatVersion: 2
+guid: 56526b5a57974a7f8d23788f47d6a0db
+timeCreated: 1574729323

Assets/GooglePlayPlugins/com.google.android.appbundle/Editor/Scripts/Internal/AssetPacks/TextureTargetingTools.cs

@@ -0,0 +1,115 @@
+// Copyright 2019 Google LLC
+//
+// 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.
+
+using System;
+using System.Text.RegularExpressions;
+using Google.Android.AppBundle.Editor.Internal.BuildTools;
+using UnityEditor;
+using UnityEngine;
+
+namespace Google.Android.AppBundle.Editor.Internal.AssetPacks
+{
+    /// <summary>
+    /// Tools for adding texture compression format targeting to folders of an Android App Bundle.
+    /// </summary>
+    public static class TextureTargetingTools
+    {
+        /// <summary>
+        /// The key used by bundletool to recognize a folder targeted for a specific texture format
+        /// (for example, "tcf" in "textures#tcf_astc").
+        /// </summary>
+        private const string TextureCompressionFormatTargetingKey = "tcf";
+
+        /// <summary>
+        /// Returns the string used to designate a texture compression format in bundletool.
+        /// </summary>
+        public static string GetBundleToolTextureCompressionFormatName(TextureCompressionFormat format)
+        {
+            if (format == TextureCompressionFormat.Default)
+            {
+                return "";
+            }
+
+            var name = Enum.GetName(typeof(TextureCompressionFormat), format);
+            return name == null ? format.ToString() : name.ToLower();
+        }
+
+        /// <summary>
+        /// Get the targeting suffix for a given texture compression format, to
+        /// be appended to a folder name containing AssetBundles.
+        /// </summary>
+        public static string GetTargetingSuffix(TextureCompressionFormat format)
+        {
+            if (format == TextureCompressionFormat.Default)
+            {
+                return "";
+            }
+
+            return string.Format("#{0}_{1}", TextureCompressionFormatTargetingKey,
+                GetBundleToolTextureCompressionFormatName(format));
+        }
+
+        /// <summary>
+        /// Parse the folder name for a texture compression format, if any, and return it as
+        /// well as the name of the folder without the targeting.
+        /// </summary>
+        public static void GetTextureCompressionFormatAndStripSuffix(string folderName,
+            out TextureCompressionFormat targeting,
+            out string tcfStrippedFolderName)
+        {
+            targeting = TextureCompressionFormat.Default;
+            tcfStrippedFolderName = folderName;
+
+            // Parse the texture compression format used, if any, using the same convention
+            // as bundletool for folder suffixes.
+            Regex regex = new Regex(@"(?<base>.+?)#tcf_(?<value>.+)");
+            GroupCollection matchedGroups = regex.Match(folderName).Groups;
+
+            if (!matchedGroups["base"].Success || !matchedGroups["value"].Success)
+            {
+                // No texture compression format targeting found.
+                return;
+            }
+
+            string tcfValue = matchedGroups["value"].Captures[0].Value;
+            try
+            {
+                targeting = (TextureCompressionFormat) Enum.Parse(typeof(TextureCompressionFormat), tcfValue, true);
+                tcfStrippedFolderName = matchedGroups["base"].Captures[0].Value;
+            }
+            catch (ArgumentException)
+            {
+                Debug.LogWarningFormat(
+                    "Ignoring unrecognized texture format \"{0}\" for folder: {1}",
+                    tcfValue, folderName);
+            }
+        }
+
+        /// <summary>
+        /// Returns true if the specified SDK version is less than 21 and false if it's greater than or equal to 21.
+        ///
+        /// This method can be used (along with the existence of install-time asset packs) to determine whether this
+        /// app requires <see cref="BundletoolConfig.StandaloneConfig"/> to support pre-L devices.
+        /// </summary>
+        public static bool IsSdkVersionPreLollipop(AndroidSdkVersions sdkVersion)
+        {
+#if UNITY_2021_2_OR_NEWER
+            // The minimum API level supported by Unity 2021.2+ is 22.
+            return false;
+#else
+            return sdkVersion < AndroidSdkVersions.AndroidApiLevel21;
+#endif
+        }
+    }
+}

Assets/GooglePlayPlugins/com.google.android.appbundle/Editor/Scripts/Internal/AssetPacks/TextureTargetingTools.cs.meta

@@ -0,0 +1,11 @@
+fileFormatVersion: 2
+guid: d474e3691efbb4141a8e8f46aeb406ef
+MonoImporter:
+  externalObjects: {}
+  serializedVersion: 2
+  defaultReferences: []
+  executionOrder: 0
+  icon: {instanceID: 0}
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: 

Assets/GooglePlayPlugins/com.google.android.appbundle/Editor/Scripts/Internal/BuildAndRunner.cs

@@ -0,0 +1,109 @@
+// Copyright 2019 Google LLC
+//
+// 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.
+
+using System;
+using System.Collections.Generic;
+using System.IO;
+using System.Linq;
+using Google.Android.AppBundle.Editor.AssetPacks;
+using Google.Android.AppBundle.Editor.Internal.BuildTools;
+using UnityEditor;
+
+namespace Google.Android.AppBundle.Editor.Internal
+{
+    /// <summary>
+    /// Helper to build and run the app based on the current build configuration.
+    /// </summary>
+    public static class BuildAndRunner
+    {
+        /// <summary>
+        /// Builds the app, then runs it on device.
+        /// First checks if any IBuildAndRunnerExtensions opt to override this action.
+        /// If so, it calls their BuildAndRun method.
+        /// Otherwise, it builds an AppBundle or apk based on asset delivery settings.
+        /// </summary>
+        public static void BuildAndRun()
+        {
+            // IBuildAndRunExtensions can opt to override the default Build and Run functionality.
+            var extensions = GetOverridingExtensions();
+            switch (extensions.Count)
+            {
+                case 0:
+                    break;
+                case 1:
+                    extensions.First().BuildAndRun();
+                    return;
+                default:
+                    // TODO(b/144588472): Choose one of multiple implementations instead of throwing.
+                    throw new InvalidOperationException(
+                        "Multiple IBuildExtensions attempting to override Build and Run.");
+            }
+
+            BuildAndRunDefault();
+        }
+
+        /// <summary>
+        /// First builds the current project as an APK or Android App Bundle, and then installs and runs it on a
+        /// connected Android device.
+        /// </summary>
+        private static void BuildAndRunDefault()
+        {
+            var assetPackConfig = AssetPackConfigSerializer.LoadConfig();
+            if (assetPackConfig.HasDeliveredAssetPacks())
+            {
+                AppBundlePublisher.BuildAndRun(assetPackConfig);
+            }
+            else
+            {
+                EmulateUnityBuildAndRun();
+            }
+        }
+
+        /// <summary>
+        /// Emulates Unity's File -> Build And Run menu option.
+        /// </summary>
+        private static void EmulateUnityBuildAndRun()
+        {
+            var androidSdk = new AndroidSdk();
+            var androidSdkPlatform = new AndroidSdkPlatform(androidSdk);
+            var androidBuilder = new AndroidBuilder(androidSdkPlatform);
+            var buildToolLogger = new BuildToolLogger();
+            if (!androidBuilder.Initialize(buildToolLogger))
+            {
+                return;
+            }
+
+            var artifactName = EditorUserBuildSettings.buildAppBundle ? "temp.aab" : "temp.apk";
+            var artifactPath = Path.Combine(Path.GetTempPath(), artifactName);
+            var buildPlayerOptions = AndroidBuildHelper.CreateBuildPlayerOptions(artifactPath);
+            buildPlayerOptions.options |= BuildOptions.AutoRunPlayer;
+            androidBuilder.Build(buildPlayerOptions);
+        }
+
+        // Visible for testing
+        public static List<IBuildAndRunExtension> GetOverridingExtensions()
+        {
+            return GetExtensions().Where(x => x.ShouldOverride()).ToList();
+        }
+
+        private static IEnumerable<IBuildAndRunExtension> GetExtensions()
+        {
+            return AppDomain.CurrentDomain.GetAssemblies().SelectMany(assembly => assembly.GetTypes())
+                .Where(type =>
+                    typeof(IBuildAndRunExtension).IsAssignableFrom(type) && !type.IsInterface && !type.IsAbstract)
+                .Select(Activator.CreateInstance)
+                .Cast<IBuildAndRunExtension>();
+        }
+    }
+}

Assets/GooglePlayPlugins/com.google.android.appbundle/Editor/Scripts/Internal/BuildAndRunner.cs.meta

@@ -0,0 +1,12 @@
+fileFormatVersion: 2
+guid: 0928808bcd00049ba8435d9cfe4f410c
+timeCreated: 1540331104
+licenseType: Pro
+MonoImporter:
+  serializedVersion: 2
+  defaultReferences: []
+  executionOrder: 0
+  icon: {instanceID: 0}
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: 

Assets/GooglePlayPlugins/com.google.android.appbundle/Editor/Scripts/Internal/BuildSettingsWindow.cs

@@ -0,0 +1,157 @@
+// Copyright 2018 Google LLC
+//
+// 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.
+
+using System;
+using Google.Android.AppBundle.Editor.Internal.Config;
+using UnityEditor;
+using UnityEngine;
+
+namespace Google.Android.AppBundle.Editor.Internal
+{
+    /// <summary>
+    /// A window for managing settings related to building an Android app for distribution on Google Play.
+    /// </summary>
+    public class BuildSettingsWindow : EditorWindow
+    {
+        public const string WindowTitle = "Play Build Settings";
+        private const int WindowMinWidth = 500;
+        private const int WindowMinHeight = 250;
+        private const int FieldWidth = 175;
+
+        private static BuildSettingsWindow _windowInstance;
+
+        private string _assetBundleManifestPath;
+
+        /// <summary>
+        /// Displays this window, creating it if necessary.
+        /// </summary>
+        public static void ShowWindow()
+        {
+            _windowInstance = (BuildSettingsWindow) GetWindow(typeof(BuildSettingsWindow), true, WindowTitle);
+            _windowInstance.minSize = new Vector2(WindowMinWidth, WindowMinHeight);
+        }
+
+        private void OnDestroy()
+        {
+            _windowInstance = null;
+        }
+
+        private void Awake()
+        {
+            ReadFromBuildConfiguration();
+        }
+
+        /// <summary>
+        /// Read and update the window with most recent build configuration values.
+        /// </summary>
+        void ReadFromBuildConfiguration()
+        {
+            _assetBundleManifestPath = AndroidBuildConfiguration.AssetBundleManifestPath;
+        }
+
+        /// <summary>
+        /// Update window with most recent build configuration values if the window is open.
+        /// </summary>
+        public static void UpdateWindowIfOpen()
+        {
+            if (_windowInstance != null)
+            {
+                _windowInstance.ReadFromBuildConfiguration();
+                _windowInstance.Repaint();
+            }
+        }
+
+        private void OnGUI()
+        {
+            // Edge case that takes place when the plugin code gets re-compiled while this window is open.
+            if (_windowInstance == null)
+            {
+                _windowInstance = this;
+            }
+
+            var descriptionTextStyle = new GUIStyle(GUI.skin.label)
+            {
+                fontStyle = FontStyle.Italic,
+                wordWrap = true
+            };
+
+            EditorGUILayout.LabelField("Scenes in Build", EditorStyles.boldLabel);
+            EditorGUILayout.LabelField(
+                string.Format(
+                    "Note: the following settings affect APKs and app bundles built using the \"{0}\" menu's " +
+                    "build actions, but not apps built using the \"File\" menu's build actions.",
+                    GoogleEditorMenu.MainMenuName), descriptionTextStyle);
+            EditorGUILayout.Space();
+
+            EditorGUILayout.LabelField(
+                "The scenes in the build are selected via Unity's \"Build Settings\" window.", descriptionTextStyle);
+            EditorGUILayout.Space();
+            EditorGUILayout.BeginHorizontal();
+            var enabledScenes = string.Join(", ", AndroidBuildHelper.GetEditorBuildEnabledScenes());
+            EditorGUILayout.LabelField(string.Format("Scenes: {0}", enabledScenes), EditorStyles.wordWrappedLabel);
+            if (GUILayout.Button("Update", GUILayout.Width(100)))
+            {
+                GetWindow(Type.GetType("UnityEditor.BuildPlayerWindow,UnityEditor"), true);
+            }
+
+            EditorGUILayout.EndHorizontal();
+            EditorGUILayout.Space();
+
+            EditorGUILayout.LabelField(
+                "If you use AssetBundles, provide the path to your AssetBundle Manifest file below to ensure that " +
+                "required engine components are not stripped during the build process.", descriptionTextStyle);
+            EditorGUILayout.Space();
+            _assetBundleManifestPath =
+                GetLabelAndTextField("AssetBundle Manifest (Optional)", _assetBundleManifestPath);
+            EditorGUILayout.Space();
+
+            // Disable the Save button unless one of the fields has changed.
+            GUI.enabled = IsAnyFieldChanged();
+
+            if (GUILayout.Button("Save"))
+            {
+                SaveConfiguration();
+            }
+
+            GUI.enabled = true;
+        }
+
+        private bool IsAnyFieldChanged()
+        {
+            return _assetBundleManifestPath != AndroidBuildConfiguration.AssetBundleManifestPath;
+        }
+
+        private static string GetLabelAndTextField(string label, string text)
+        {
+            EditorGUILayout.BeginHorizontal();
+            EditorGUILayout.LabelField(label, GUILayout.Width(FieldWidth));
+            var result = EditorGUILayout.TextField(text);
+            EditorGUILayout.EndHorizontal();
+            EditorGUILayout.Space();
+            return result;
+        }
+
+        private void SaveConfiguration()
+        {
+            _assetBundleManifestPath = _assetBundleManifestPath.Trim();
+            AndroidBuildConfiguration.SaveConfiguration(_assetBundleManifestPath);
+
+            Debug.Log("Saved Android Build Settings");
+
+            // If a TextField is in focus, it won't update to reflect the Trim(). So reassign focus to controlID 0.
+            GUIUtility.keyboardControl = 0;
+            Repaint();
+        }
+    }
+}

Assets/GooglePlayPlugins/com.google.android.appbundle/Editor/Scripts/Internal/BuildSettingsWindow.cs.meta

@@ -0,0 +1,12 @@
+fileFormatVersion: 2
+guid: d3494e8040ba74ee78ff64f1018b5969
+timeCreated: 1540331105
+licenseType: Pro
+MonoImporter:
+  serializedVersion: 2
+  defaultReferences: []
+  executionOrder: 0
+  icon: {instanceID: 0}
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: 

Assets/GooglePlayPlugins/com.google.android.appbundle/Editor/Scripts/Internal/BuildTools.meta

@@ -0,0 +1,8 @@
+fileFormatVersion: 2
+guid: 2ee7c5073444e433eb10f83395460280
+folderAsset: yes
+DefaultImporter:
+  externalObjects: {}
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: 

Assets/GooglePlayPlugins/com.google.android.appbundle/Editor/Scripts/Internal/BuildTools/AndroidAssetPackagingTool.cs

@@ -0,0 +1,109 @@
+// Copyright 2018 Google LLC
+//
+// 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.
+
+using System;
+using System.IO;
+using Google.Android.AppBundle.Editor.Internal.PlayServices;
+
+namespace Google.Android.AppBundle.Editor.Internal.BuildTools
+{
+    /// <summary>
+    /// Build tool for running <a href="https://developer.android.com/studio/command-line/aapt2">aapt2</a> commands.
+    /// </summary>
+    public class AndroidAssetPackagingTool : IBuildTool
+    {
+        /// <summary>
+        /// Minimum version of Android SDK Build-Tools that supports "aapt2 link --proto-format".
+        /// </summary>
+        private const string BuildToolsMinimumVersion = "28.0.0";
+
+        private const string BuildToolsDisplayName = "Android SDK Build-Tools";
+
+        private readonly AndroidBuildTools _androidBuildTools;
+        private readonly AndroidSdkPlatform _androidSdkPlatform;
+
+        /// <summary>
+        /// Constructor.
+        /// </summary>
+        public AndroidAssetPackagingTool(AndroidBuildTools androidBuildTools, AndroidSdkPlatform androidSdkPlatform)
+        {
+            _androidBuildTools = androidBuildTools;
+            _androidSdkPlatform = androidSdkPlatform;
+        }
+
+        public virtual bool Initialize(BuildToolLogger buildToolLogger)
+        {
+            if (!_androidBuildTools.Initialize(buildToolLogger) || !_androidSdkPlatform.Initialize(buildToolLogger))
+            {
+                return false;
+            }
+
+            var newestBuildToolsVersion = _androidBuildTools.GetNewestBuildToolsVersion();
+            if (newestBuildToolsVersion == null)
+            {
+                buildToolLogger.DisplayErrorDialog(string.Format("Failed to locate {0}", BuildToolsDisplayName));
+                return false;
+            }
+
+            if (AndroidBuildTools.IsBuildToolsVersionAtLeast(newestBuildToolsVersion, BuildToolsMinimumVersion))
+            {
+                return true;
+            }
+
+            var message =
+                string.Format(
+                    "This build requires {0} version {1} or later.", BuildToolsDisplayName, BuildToolsMinimumVersion);
+            buildToolLogger.DisplayErrorDialog(message);
+            return false;
+        }
+
+        /// <summary>
+        /// Given the AndroidManifest.xml file path, creates an APK whose
+        /// files are exploded into the specified output directory path.
+        /// </summary>
+        /// <returns>An error message if there was a problem running aapt2, or null if successful.</returns>
+        public virtual string Link(string manifestPath, string outputPath)
+        {
+            return Run(
+                "link -I {0} --manifest {1} --proto-format --output-to-dir -o {2}",
+                CommandLine.QuotePath(GetAndroidJarPath()),
+                CommandLine.QuotePath(manifestPath),
+                CommandLine.QuotePath(outputPath));
+        }
+
+        private string Run(string aaptCommand, params object[] args)
+        {
+            var aaptPath = Path.Combine(_androidBuildTools.GetNewestBuildToolsPath(), "aapt2");
+            var result = CommandLine.Run(aaptPath, string.Format(aaptCommand, args));
+            return result.exitCode == 0 ? null : result.message;
+        }
+
+        private string GetAndroidJarPath()
+        {
+            var newestPlatformPath = _androidSdkPlatform.GetNewestAndroidSdkPlatformPath();
+            if (newestPlatformPath == null)
+            {
+                throw new Exception("Unable to locate the latest version of the Android SDK Platform.");
+            }
+
+            var androidJarPath = Path.Combine(newestPlatformPath, "android.jar");
+            if (!File.Exists(androidJarPath))
+            {
+                throw new Exception("Unable to locate android.jar in path:" + androidJarPath);
+            }
+
+            return androidJarPath;
+        }
+    }
+}

Assets/GooglePlayPlugins/com.google.android.appbundle/Editor/Scripts/Internal/BuildTools/AndroidAssetPackagingTool.cs.meta

@@ -0,0 +1,12 @@
+fileFormatVersion: 2
+guid: c349f457532c645d8817661cbdcb5729
+timeCreated: 1556911730
+licenseType: Pro
+MonoImporter:
+  serializedVersion: 2
+  defaultReferences: []
+  executionOrder: 0
+  icon: {instanceID: 0}
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: 

Assets/GooglePlayPlugins/com.google.android.appbundle/Editor/Scripts/Internal/BuildTools/AndroidBuildTools.cs

@@ -0,0 +1,161 @@
+// Copyright 2018 Google LLC
+//
+// 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.
+
+using System;
+using System.Collections.Generic;
+using System.IO;
+using System.Linq;
+using System.Text.RegularExpressions;
+using Google.Android.AppBundle.Editor.Internal.Utils;
+using UnityEngine;
+
+namespace Google.Android.AppBundle.Editor.Internal.BuildTools
+{
+    /// <summary>
+    /// Provides utility methods related to Android SDK build-tools.
+    /// </summary>
+    public class AndroidBuildTools : IBuildTool
+    {
+        private const long VersionComponentMultiplier = 10000L;
+        private const long ReleaseCandidateComponentSubtractor = 5000L;
+
+        private static readonly Regex VersionRegex = RegexHelper.CreateCompiled(@"^(\d+)\.(\d+)\.(\d+)(-rc(\d+))?$");
+
+        private readonly AndroidSdk _androidSdk;
+
+        /// <summary>
+        /// Constructor. Must be called from the main thread.
+        /// </summary>
+        public AndroidBuildTools(AndroidSdk androidSdk)
+        {
+            _androidSdk = androidSdk;
+        }
+
+        public virtual bool Initialize(BuildToolLogger buildToolLogger)
+        {
+            return _androidSdk.Initialize(buildToolLogger);
+        }
+
+        /// <summary>
+        /// Returns the path to the newest version of build-tools path as a string, or null if it wasn't found.
+        /// </summary>
+        public virtual string GetNewestBuildToolsPath()
+        {
+            var newestBuildToolsVersion = GetNewestBuildToolsVersion();
+            return newestBuildToolsVersion == null ? null : Path.Combine(GetBuildToolsPath(), newestBuildToolsVersion);
+        }
+
+        /// <summary>
+        /// Returns the newest build-tools version as a string, or null if one couldn't be found.
+        /// </summary>
+        public virtual string GetNewestBuildToolsVersion()
+        {
+            var buildToolsPath = GetBuildToolsPath();
+            if (!Directory.Exists(buildToolsPath))
+            {
+                Debug.LogErrorFormat("Failed to locate build-tools path: {0}", buildToolsPath);
+                return null;
+            }
+
+            var directoryInfo = new DirectoryInfo(buildToolsPath);
+            var directoryNames = directoryInfo.GetDirectories().Select(dir => dir.Name);
+            var newestBuildTools = GetNewestVersion(directoryNames);
+            if (newestBuildTools == null)
+            {
+                Debug.LogErrorFormat("Failed to locate newest build-tools: {0}", buildToolsPath);
+                return null;
+            }
+
+            return newestBuildTools;
+        }
+
+        private string GetBuildToolsPath()
+        {
+            return Path.Combine(_androidSdk.RootPath, "build-tools");
+        }
+
+        /// <summary>
+        /// Returns true if the specified existing version is the same as or newer than the specified minimum version,
+        /// and false otherwise.
+        /// </summary>
+        public static bool IsBuildToolsVersionAtLeast(string existingVersion, string minimumRequiredVersion)
+        {
+            return ConvertVersionStringToLong(existingVersion) >= ConvertVersionStringToLong(minimumRequiredVersion);
+        }
+
+        // Visible for testing.
+        public static string GetNewestVersion(IEnumerable<string> versions)
+        {
+            var maxVersionLong = -1L;
+            string maxVersionString = null;
+            foreach (var versionString in versions)
+            {
+                var versionLong = ConvertVersionStringToLong(versionString);
+                if (versionLong > maxVersionLong)
+                {
+                    maxVersionLong = versionLong;
+                    maxVersionString = versionString;
+                }
+            }
+
+            return maxVersionString;
+        }
+
+        private static long ConvertVersionStringToLong(string versionString)
+        {
+            var match = VersionRegex.Match(versionString);
+            if (!match.Success)
+            {
+                return -1L;
+            }
+
+            var versionLong = 0L;
+            for (var i = 1; i <= 3; i++)
+            {
+                var versionComponent = long.Parse(match.Groups[i].Value);
+                if (versionComponent >= VersionComponentMultiplier)
+                {
+                    throw new ArgumentException(
+                        string.Format("Component {0} from {1} exceeds the limit.", versionComponent, versionString),
+                        "versionString");
+                }
+
+                versionLong += versionComponent;
+                // Multiply by a somewhat arbitrary value since major version outweighs minor version.
+                // This particular arbitrary value supports up to 4 digits per version component.
+                versionLong *= VersionComponentMultiplier;
+            }
+
+            var releaseCandidateVersionGroup = match.Groups[5];
+            if (releaseCandidateVersionGroup.Success)
+            {
+                var releaseCandidateVersion = long.Parse(releaseCandidateVersionGroup.Value);
+                if (releaseCandidateVersion >= ReleaseCandidateComponentSubtractor)
+                {
+                    throw new ArgumentException(
+                        string.Format("rc{0} from {1} exceeds the limit.", releaseCandidateVersion, versionString),
+                        "versionString");
+                }
+
+                // Add the release candidate version, e.g. rc2 is newer than rc1.
+                versionLong += releaseCandidateVersion;
+                // But also subtract a little, since any "rc" is earlier than the equivalent release,
+                // e.g. "28.0.0-rc2" is older than "28.0.0".
+                versionLong -= ReleaseCandidateComponentSubtractor;
+            }
+
+            return versionLong;
+        }
+    }
+}

Assets/GooglePlayPlugins/com.google.android.appbundle/Editor/Scripts/Internal/BuildTools/AndroidBuildTools.cs.meta

@@ -0,0 +1,12 @@
+fileFormatVersion: 2
+guid: 46ae92b3dd8eb4e38b66ff3b58205318
+timeCreated: 1556911730
+licenseType: Pro
+MonoImporter:
+  serializedVersion: 2
+  defaultReferences: []
+  executionOrder: 0
+  icon: {instanceID: 0}
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: 

Assets/GooglePlayPlugins/com.google.android.appbundle/Editor/Scripts/Internal/BuildTools/AndroidBuilder.cs

@@ -0,0 +1,257 @@
+// Copyright 2018 Google LLC
+//
+// 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.
+
+using System;
+using System.IO;
+using Google.Android.AppBundle.Editor.Internal.AssetPacks;
+using UnityEditor;
+using UnityEngine;
+#if UNITY_2018_1_OR_NEWER
+using UnityEditor.Build.Reporting;
+
+#endif
+
+namespace Google.Android.AppBundle.Editor.Internal.BuildTools
+{
+    /// <summary>
+    /// Indicates the results of an <see cref="AndroidBuilder"/> build. This provides similar information as
+    /// Task&lt;AndroidBuildReport&gt; without requiring the .NET 4.0 async task API.
+    /// </summary>
+    public class AndroidBuildResult
+    {
+        /// <summary>
+        /// Returns true if Android Player build Succeeded, otherwise false.
+        /// </summary>
+        public bool Succeeded
+        {
+            get { return !Cancelled && ErrorMessage == null; }
+        }
+
+        /// <summary>
+        /// Returns true if the Android Player build was cancelled before it finished.
+        /// </summary>
+        public bool Cancelled { get; internal set; }
+
+        /// <summary>
+        /// If non-null, the build failed and this message may indicate the cause.
+        /// </summary>
+        public string ErrorMessage { get; internal set; }
+
+#if UNITY_2018_1_OR_NEWER
+        /// <summary>
+        /// Contains the BuildReport generated during the creation of the Android Player.
+        /// </summary>
+        public BuildReport Report { get; internal set; }
+#endif
+    }
+
+    /// <summary>
+    /// Provides methods for building an Android app for distribution on Google Play.
+    /// </summary>
+    public class AndroidBuilder : IBuildTool
+    {
+        // This string is returned by pre-2018.1's BuildPipeline.BuildPlayer() when a build is cancelled.
+        private const string BuildCancelledMessage = "Building Player was cancelled";
+
+        private readonly AndroidSdkPlatform _androidSdkPlatform;
+
+        private BuildToolLogger _buildToolLogger;
+
+        public AndroidBuilder(AndroidSdkPlatform androidSdkPlatform)
+        {
+            _androidSdkPlatform = androidSdkPlatform;
+        }
+
+        // TODO(b/189958664): Needed for 1.x API compatibility. Should be removed with 2.x.
+        public AndroidBuilder(AndroidSdkPlatform androidSdkPlatform, ApkSigner apkSigner) : this(androidSdkPlatform)
+        {
+        }
+
+        public virtual bool Initialize(BuildToolLogger buildToolLogger)
+        {
+            _buildToolLogger = buildToolLogger;
+
+            if (EditorUserBuildSettings.androidBuildSystem != AndroidBuildSystem.Gradle)
+            {
+                // We require Gradle builds for APK Signature Scheme V2, which is required for Play Instant on Unity 2017+.
+                const string message = "This build requires the Gradle Build System.\n\n" +
+                                       "Click \"OK\" to change the Android Build System to Gradle.";
+                if (buildToolLogger.DisplayActionableErrorDialog(message))
+                {
+                    EditorUserBuildSettings.androidBuildSystem = AndroidBuildSystem.Gradle;
+                }
+
+                return false;
+            }
+
+            // TODO(b/154937088): remove this check if we add support for exporting a Gradle project.
+            if (EditorUserBuildSettings.exportAsGoogleAndroidProject)
+            {
+                const string message = "This build doesn't support exporting to Android Studio.\n\n" +
+                                       "Click \"OK\" to disable exporting a Gradle project.";
+                if (buildToolLogger.DisplayActionableErrorDialog(message))
+                {
+                    EditorUserBuildSettings.exportAsGoogleAndroidProject = false;
+                }
+
+                return false;
+            }
+
+            if (BuiltInPadHelper.EditorSupportsPad() && BuiltInPadHelper.ProjectHasAndroidPacks())
+            {
+                var message =
+                    "This build method doesn't support .androidpack folders. Assets within those folders will not be included" +
+                    " in the build.";
+                buildToolLogger.DisplayOptOutDialog(message, "androidPackError");
+            }
+
+            if (PlayerSettings.Android.splitApplicationBinary)
+            {
+                string messagePrefix;
+                if (BuiltInPadHelper.EditorSupportsPad())
+                {
+                    messagePrefix = "This build method doesn't support Unity's \"Split Application Binary\" option.";
+                }
+                else
+                {
+                    messagePrefix = "This build method doesn't support APK Expansion (OBB) files.";
+                }
+
+                var message = string.Format(
+                    "{0}\n\nLarge games can instead use the " +
+                    "\"{1}\" option available through the \"Google > Android App Bundle > Asset Delivery " +
+                    "Settings\" menu or the AssetPackConfig API's SplitBaseModuleAssets field.\n\n" +
+                    "Click \"OK\" to disable the \"Split Application Binary\" setting.",
+                    messagePrefix,
+                    AssetDeliveryWindow.SeparateAssetsLabel);
+                if (buildToolLogger.DisplayActionableErrorDialog(message))
+                {
+                    PlayerSettings.Android.splitApplicationBinary = false;
+                }
+
+                return false;
+            }
+
+            return _androidSdkPlatform.Initialize(buildToolLogger);
+        }
+
+        // TODO(b/189958664): Needed for 1.x API compatibility. Should be removed with 2.x.
+        public virtual bool BuildAndSign(BuildPlayerOptions buildPlayerOptions)
+        {
+            return Build(buildPlayerOptions).Succeeded;
+        }
+
+        /// <summary>
+        /// Builds an APK or AAB based on the specified options.
+        /// Displays warning/error dialogs if there are issues during the build.
+        /// </summary>
+        public virtual AndroidBuildResult Build(BuildPlayerOptions buildPlayerOptions)
+        {
+            if (_buildToolLogger == null)
+            {
+                throw new BuildToolNotInitializedException(this);
+            }
+
+            if (buildPlayerOptions.target != BuildTarget.Android)
+            {
+                throw new ArgumentException("The build target must be Android.", "buildPlayerOptions");
+            }
+
+            if (buildPlayerOptions.targetGroup != BuildTargetGroup.Android)
+            {
+                throw new ArgumentException("The build target group must be Android.", "buildPlayerOptions");
+            }
+
+            // Note: the type of the variable below differs by version. On 2018+ it's BuildReport. On pre-2018 it's
+            // string: if the string is null, the build was successful, otherwise it's a build error message.
+            var buildReportOrErrorMessage = BuildPipeline.BuildPlayer(buildPlayerOptions);
+            var androidBuildResult = GetAndroidBuildResult(buildReportOrErrorMessage);
+            if (androidBuildResult.Cancelled)
+            {
+                // Don't display an error message dialog if the user asked to cancel, just log to the Console.
+                Debug.Log(BuildCancelledMessage);
+                return androidBuildResult;
+            }
+
+            if (androidBuildResult.Succeeded && !File.Exists(buildPlayerOptions.locationPathName))
+            {
+                // Sometimes the build "succeeds" but the AAB/APK file is missing.
+                androidBuildResult.ErrorMessage =
+                    string.Format(
+                        "The Android Player file \"{0}\" is missing, possibly because of a late cancellation.",
+                        buildPlayerOptions.locationPathName);
+#if UNITY_2018_1_OR_NEWER
+                androidBuildResult.ErrorMessage += " TotalErrors=" + buildReportOrErrorMessage.summary.totalErrors;
+#endif
+            }
+
+            if (androidBuildResult.Succeeded)
+            {
+                Debug.Log("Android Player build succeeded");
+            }
+            else
+            {
+                _buildToolLogger.DisplayErrorDialog(androidBuildResult.ErrorMessage);
+            }
+
+            return androidBuildResult;
+        }
+
+#if UNITY_2018_1_OR_NEWER
+        private static AndroidBuildResult GetAndroidBuildResult(BuildReport buildReport)
+        {
+            var androidBuildResult = new AndroidBuildResult();
+            androidBuildResult.Report = buildReport;
+            switch (buildReport.summary.result)
+            {
+                case BuildResult.Succeeded:
+                    // Do nothing.
+                    break;
+                case BuildResult.Cancelled:
+                    androidBuildResult.Cancelled = true;
+                    break;
+                case BuildResult.Failed:
+                    androidBuildResult.ErrorMessage =
+                        string.Format("Build failed with {0} error(s)", buildReport.summary.totalErrors);
+                    break;
+                case BuildResult.Unknown:
+                    androidBuildResult.ErrorMessage = "Build failed with unknown result";
+                    break;
+                default:
+                    androidBuildResult.ErrorMessage =
+                        "Build failed with unexpected result: " + buildReport.summary.result;
+                    break;
+            }
+
+            return androidBuildResult;
+        }
+#else
+        private static AndroidBuildResult GetAndroidBuildResult(string errorMessage)
+        {
+            var androidBuildResult = new AndroidBuildResult();
+            if (errorMessage == BuildCancelledMessage)
+            {
+                androidBuildResult.Cancelled = true;
+            }
+            else if (!string.IsNullOrEmpty(errorMessage))
+            {
+                // Assume that a null or empty error message string indicates success.
+                androidBuildResult.ErrorMessage = errorMessage;
+            }
+
+            return androidBuildResult;
+        }
+#endif
+    }
+}

Assets/GooglePlayPlugins/com.google.android.appbundle/Editor/Scripts/Internal/BuildTools/AndroidBuilder.cs.meta

@@ -0,0 +1,12 @@
+fileFormatVersion: 2
+guid: 24e34b4393a4d4a5d8de83ca5e08621c
+timeCreated: 1556919494
+licenseType: Pro
+MonoImporter:
+  serializedVersion: 2
+  defaultReferences: []
+  executionOrder: 0
+  icon: {instanceID: 0}
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: 

Assets/GooglePlayPlugins/com.google.android.appbundle/Editor/Scripts/Internal/BuildTools/AndroidDebugBridge.cs

@@ -0,0 +1,85 @@
+// Copyright 2019 Google LLC
+//
+// 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.
+
+using System.IO;
+using Google.Android.AppBundle.Editor.Internal.PlayServices;
+
+namespace Google.Android.AppBundle.Editor.Internal.BuildTools
+{
+    /// <summary>
+    /// Provides methods for <a href="https://developer.android.com/studio/command-line/adb">adb</a>.
+    /// </summary>
+    public class AndroidDebugBridge : IBuildTool
+    {
+        private const string AdbName = "adb";
+        private const string AdbDirectory = "platform-tools";
+        private readonly AndroidSdk _androidSdk;
+        private string _adbPath;
+
+        /// <summary>
+        /// Constructor.
+        /// </summary>
+        public AndroidDebugBridge(AndroidSdk androidSdk)
+        {
+            _androidSdk = androidSdk;
+        }
+
+        public virtual bool Initialize(BuildToolLogger buildToolLogger)
+        {
+            if (!_androidSdk.Initialize(buildToolLogger))
+            {
+                return false;
+            }
+
+            _adbPath = GetAdbPath();
+            return _adbPath != null;
+        }
+
+        /// <summary>
+        /// Launches the default activity in the specified package.
+        /// Assumes that there is exactly one adb connected device.
+        /// </summary>
+        /// <param name="packageName">The name of the package to be launched e.g. "com.package.name".</param>
+        /// <returns>An error message if the command failed or null if successful.</returns>
+        public string LaunchApp(string packageName)
+        {
+            // Run the Monkey tool restricted to packageName and with 1 event, thereby launching the app.
+            // See https://developer.android.com/studio/test/monkey.html
+            return Run("shell monkey -p {0} 1", packageName);
+        }
+
+        /// <summary>
+        /// Gets the path to the adb executable associated with the androidSdk object passed into Initialize().
+        /// </summary>
+        public string GetAdbPath()
+        {
+            var adbPath = Path.Combine(_androidSdk.RootPath,
+                Path.Combine(AdbDirectory, AdbName + CommandLine.GetExecutableExtension()));
+            if (File.Exists(adbPath))
+            {
+                return adbPath;
+            }
+
+            adbPath = CommandLine.FindExecutable(AdbName);
+            return File.Exists(adbPath) ? adbPath : null;
+        }
+
+        private string Run(string adbCommand, params object[] args)
+        {
+            var adbCommandWithArgs = string.Format(adbCommand, args);
+            var result = CommandLine.Run(_adbPath, adbCommandWithArgs);
+            return result.exitCode == 0 ? null : result.message;
+        }
+    }
+}

Assets/GooglePlayPlugins/com.google.android.appbundle/Editor/Scripts/Internal/BuildTools/AndroidDebugBridge.cs.meta

@@ -0,0 +1,12 @@
+fileFormatVersion: 2
+guid: 3a5aaac6c5d78491aa3590cbff08a890
+timeCreated: 1556913938
+licenseType: Pro
+MonoImporter:
+  serializedVersion: 2
+  defaultReferences: []
+  executionOrder: 0
+  icon: {instanceID: 0}
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: 

Assets/GooglePlayPlugins/com.google.android.appbundle/Editor/Scripts/Internal/BuildTools/AndroidSdk.cs

@@ -0,0 +1,169 @@
+// Copyright 2019 Google LLC
+//
+// 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.
+
+using System;
+using System.IO;
+using UnityEditor;
+using UnityEngine;
+
+namespace Google.Android.AppBundle.Editor.Internal.BuildTools
+{
+    /// <summary>
+    /// Build tool for finding the Android SDK root path.
+    /// </summary>
+    public class AndroidSdk : IBuildTool
+    {
+        /// <summary>
+        /// The ANDROID_HOME environment variable key.
+        /// </summary>
+        public const string AndroidHomeEnvironmentVariableKey = "ANDROID_HOME";
+
+        private const string AndroidNdkHomeEnvironmentVariableKey = "ANDROID_NDK_HOME";
+
+        /// <summary>
+        /// The environment variable key we use when overriding existing Unity editor preferences.
+        /// We use UNITY_JAVA_HOME instead of JAVA_HOME because Unity will override JAVA_HOME to match it's editor preferences.
+        /// </summary>
+        private const string JavaHomeEnvironmentVariableKey = "UNITY_JAVA_HOME";
+        private const string AndroidSdkRootEditorPrefsKey = "AndroidSdkRoot";
+        private const string AndroidNdkRootEditorPrefsKey = "AndroidNdkRoot";
+        private const string JdkPathEditorPrefsKey = "JdkPath";
+        private const string JdkUseEmbeddedEditorPrefsKey = "JdkUseEmbedded";
+
+        private string _androidSdkRoot;
+
+        public virtual bool Initialize(BuildToolLogger buildToolLogger)
+        {
+#if !UNITY_2019_3_OR_NEWER
+            return SetSdkRoot(buildToolLogger, EditorPrefs.GetString(AndroidSdkRootEditorPrefsKey));
+#elif UNITY_ANDROID
+            // Guard with #if UNITY_ANDROID since UnityEditor.Android.Extensions.dll might be unavailable,
+            // e.g. on a build machine without the Android platform installed.
+            return SetSdkRoot(buildToolLogger, UnityEditor.Android.AndroidExternalToolsSettings.sdkRootPath);
+#else
+            // This would be an unexpected and hopefully transient error.
+            if (EditorUserBuildSettings.activeBuildTarget == BuildTarget.Android)
+            {
+                buildToolLogger.DisplayErrorDialog("ActiveBuildTarget disagrees with #if UNITY_ANDROID.");
+                return false;
+            }
+
+            // Handle the case where the UnityEditor.Android.Extensions.dll file may not be available by requiring that
+            // Android be the selected platform on 2019.3+.
+            const string message = "The Build Settings > Platform must be set to Android." +
+                                   "\n\nClick \"OK\" to switch the active platform to Android.";
+            if (buildToolLogger.DisplayActionableErrorDialog(message))
+            {
+                EditorUserBuildSettings.SwitchActiveBuildTarget(BuildTargetGroup.Android, BuildTarget.Android);
+            }
+
+            return false;
+#endif
+        }
+
+        /// <summary>
+        /// Returns the AndroidSdkRoot from Unity preferences or from the ANDROID_HOME environment variable.
+        /// </summary>
+        public virtual string RootPath
+        {
+            get
+            {
+                if (_androidSdkRoot == null)
+                {
+                    throw new BuildToolNotInitializedException(this);
+                }
+
+                return _androidSdkRoot;
+            }
+        }
+
+        /// <summary>
+        /// Override the AndroidSdkRoot/AndroidNdkRoot/JdkPath EditorPrefs with corresponding environment variables.
+        /// This is especially helpful for automated builds where the preferences may not be set.
+        /// </summary>
+        public static void OverrideEditorPreferences()
+        {
+#if !UNITY_ANDROID
+            return;
+#elif UNITY_2019_3_OR_NEWER
+            OverrideEditorPreference(AndroidHomeEnvironmentVariableKey,
+                () => UnityEditor.Android.AndroidExternalToolsSettings.sdkRootPath,
+                v => { UnityEditor.Android.AndroidExternalToolsSettings.sdkRootPath = v; });
+            OverrideEditorPreference(AndroidNdkHomeEnvironmentVariableKey,
+                () => UnityEditor.Android.AndroidExternalToolsSettings.ndkRootPath,
+                v => { UnityEditor.Android.AndroidExternalToolsSettings.ndkRootPath = v; });
+            OverrideEditorPreference(JavaHomeEnvironmentVariableKey,
+                () => UnityEditor.Android.AndroidExternalToolsSettings.jdkRootPath,
+                v => { UnityEditor.Android.AndroidExternalToolsSettings.jdkRootPath = v; });
+#else
+            OverrideEditorPreference(AndroidHomeEnvironmentVariableKey,
+                () => EditorPrefs.GetString(AndroidSdkRootEditorPrefsKey),
+                v => { EditorPrefs.SetString(AndroidSdkRootEditorPrefsKey, v); });
+            OverrideEditorPreference(AndroidNdkHomeEnvironmentVariableKey,
+                () => EditorPrefs.GetString(AndroidNdkRootEditorPrefsKey),
+                v => { EditorPrefs.SetString(AndroidNdkRootEditorPrefsKey, v); });
+
+            OverrideEditorPreference(JavaHomeEnvironmentVariableKey,
+                () => EditorPrefs.GetString(JdkPathEditorPrefsKey),
+                v => { EditorPrefs.SetString(JdkPathEditorPrefsKey, v); });
+
+            // Older versions of Unity have an additional boolean preference that must be disabled.
+            // Otherwise, Unity will use the JDK installed with the editor instead of the path we set in EditorPrefs.
+            EditorPrefs.SetInt(JdkUseEmbeddedEditorPrefsKey, 0);
+#endif
+        }
+
+        // TODO(b/189958664): Move this to a helper class and move the JDK portion of OverrideEditorPreferences into JavaUtils.
+        private static void OverrideEditorPreference(
+            string environmentVariableKey, Func<string> getPreference, Action<string> setPreference)
+        {
+            var environmentVariableValue = Environment.GetEnvironmentVariable(environmentVariableKey);
+            var existingPreferenceValue = getPreference();
+            Debug.LogFormat("Existing preference for {0} is \"{1}\"", environmentVariableKey, existingPreferenceValue);
+            if (environmentVariableValue == existingPreferenceValue)
+            {
+                // Nothing to do.
+                return;
+            }
+
+            if (string.IsNullOrEmpty(environmentVariableValue))
+            {
+                Debug.LogWarningFormat("Skipping empty environment variable: {0}", environmentVariableKey);
+            }
+            else
+            {
+                Debug.LogFormat("Setting preference for {0} to {1}", environmentVariableKey, environmentVariableValue);
+                setPreference(environmentVariableValue);
+            }
+        }
+
+        private bool SetSdkRoot(BuildToolLogger buildToolLogger, string sdkPath)
+        {
+            if (string.IsNullOrEmpty(sdkPath))
+            {
+                sdkPath = Environment.GetEnvironmentVariable(AndroidHomeEnvironmentVariableKey);
+            }
+
+            if (!Directory.Exists(sdkPath))
+            {
+                buildToolLogger.DisplayErrorDialog(
+                    "Failed to locate the Android SDK. Check Preferences -> External Tools to set the path.");
+                return false;
+            }
+
+            _androidSdkRoot = sdkPath;
+            return true;
+        }
+    }
+}

Assets/GooglePlayPlugins/com.google.android.appbundle/Editor/Scripts/Internal/BuildTools/AndroidSdk.cs.meta

@@ -0,0 +1,12 @@
+fileFormatVersion: 2
+guid: 408798f1df959420d8fb95911a935f2d
+timeCreated: 1556899571
+licenseType: Pro
+MonoImporter:
+  serializedVersion: 2
+  defaultReferences: []
+  executionOrder: 0
+  icon: {instanceID: 0}
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: 

Assets/GooglePlayPlugins/com.google.android.appbundle/Editor/Scripts/Internal/BuildTools/AndroidSdkPlatform.cs

@@ -0,0 +1,155 @@
+// Copyright 2019 Google LLC
+//
+// 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.
+
+using System;
+using System.IO;
+using System.Text.RegularExpressions;
+using Google.Android.AppBundle.Editor.Internal.Utils;
+using UnityEditor;
+using UnityEngine;
+
+namespace Google.Android.AppBundle.Editor.Internal.BuildTools
+{
+    /// <summary>
+    /// Build tool for discovering Android SDK Platform versions.
+    /// </summary>
+    public class AndroidSdkPlatform : IBuildTool
+    {
+        // The minimum Android target SDK version supported by Google Play is described here:
+        // https://support.google.com/googleplay/android-developer/answer/113469#targetsdk
+        private const int MinimumVersion = 30;
+        private const int LatestVersion = 31;
+
+        private static readonly Regex PlatformVersionRegex = RegexHelper.CreateCompiled(@"^android-(\d+)$");
+
+        private readonly AndroidSdk _androidSdk;
+
+        public AndroidSdkPlatform(AndroidSdk androidSdk)
+        {
+            _androidSdk = androidSdk;
+        }
+
+        public virtual bool Initialize(BuildToolLogger buildToolLogger)
+        {
+            if (!_androidSdk.Initialize(buildToolLogger))
+            {
+                return false;
+            }
+
+            // If targetSdkVersion is higher than the MinimumVersion, we skip verifying the newest version,
+            // and instead trust that Unity will install it at build time if it isn't already available.
+            var targetSdkVersion = PlayerSettings.Android.targetSdkVersion;
+            if ((int)targetSdkVersion >= MinimumVersion)
+            {
+                return true;
+            }
+
+            string ignoredPath;
+            var newestVersion = GetNewestVersionAndPath(out ignoredPath);
+            if (newestVersion == null)
+            {
+                // Being unable to find any existing SDK may indicate a config issue, so don't try to install a new SDK.
+                buildToolLogger.DisplayErrorDialog(
+                    "Failed to locate any Android SDK Platform version. Check that the Android SDK specified "
+                    + "through Preferences -> External Tools has at least one Android SDK Platform installed.");
+                return false;
+            }
+
+            if (newestVersion < MinimumVersion)
+            {
+                var installedVersionMessage = string.Format(
+                    "The highest installed Android API Level is {0}, however version {1} is the minimum "
+                    + "required to build for Google Play.\n\nClick \"OK\" to install Android API Level {2}.",
+                    newestVersion, MinimumVersion, LatestVersion);
+                if (buildToolLogger.DisplayActionableErrorDialog(installedVersionMessage))
+                {
+                    // Note: this install can be slow, but it's not clear that it's any slower through Unity.
+                    AndroidSdkPackageInstaller.InstallPackage(
+                        string.Format("platforms;android-{0}", LatestVersion),
+                        string.Format("Android SDK Platform {0}", LatestVersion),
+                        _androidSdk.RootPath);
+                }
+
+                return false;
+            }
+
+            if (targetSdkVersion == AndroidSdkVersions.AndroidApiLevelAuto)
+            {
+                return true;
+            }
+
+            var selectedVersionMessage = string.Format(
+                "The currently selected Android Target API Level is {0}, however version {1} is the minimum "
+                + "required to build for Google Play.\n\nClick \"OK\" to change the Target API Level to "
+                + "\"Automatic (highest installed)\", which is currently {2}.",
+                (int)targetSdkVersion, MinimumVersion, newestVersion);
+            if (buildToolLogger.DisplayActionableErrorDialog(selectedVersionMessage))
+            {
+                PlayerSettings.Android.targetSdkVersion = AndroidSdkVersions.AndroidApiLevelAuto;
+            }
+
+            return false;
+        }
+
+        /// <summary>
+        /// Returns the path to the newest installed version of the Android SDK Platform, or null if it isn't found.
+        /// </summary>
+        public virtual string GetNewestAndroidSdkPlatformPath()
+        {
+            string newestPlatformPath;
+            GetNewestVersionAndPath(out newestPlatformPath);
+            return newestPlatformPath;
+        }
+
+        private int? GetNewestVersionAndPath(out string newestPlatformPath)
+        {
+            newestPlatformPath = null;
+            var platformsPath = Path.Combine(_androidSdk.RootPath, "platforms");
+            var platformsDirectoryInfo = new DirectoryInfo(platformsPath);
+            if (!platformsDirectoryInfo.Exists)
+            {
+                Debug.LogErrorFormat("Unable to locate Android SDK platforms directory: {0}", platformsPath);
+                return null;
+            }
+
+            int? newestPlatformVersion = null;
+            DirectoryInfo newestPlatformDirectory = null;
+            foreach (var platformDirectory in platformsDirectoryInfo.GetDirectories())
+            {
+                var match = PlatformVersionRegex.Match(platformDirectory.Name);
+                if (!match.Success)
+                {
+                    continue;
+                }
+
+                var platformVersionString = match.Groups[1].Value;
+                var platformVersion = int.Parse(platformVersionString);
+                newestPlatformVersion = Math.Max(platformVersion, newestPlatformVersion ?? -1);
+                if (platformVersion == newestPlatformVersion)
+                {
+                    newestPlatformDirectory = platformDirectory;
+                }
+            }
+
+            if (newestPlatformDirectory == null)
+            {
+                Debug.LogErrorFormat("Unable to locate newest Android SDK platform in directory: {0}", platformsPath);
+                return null;
+            }
+
+            newestPlatformPath = newestPlatformDirectory.FullName;
+            return newestPlatformVersion;
+        }
+    }
+}

Assets/GooglePlayPlugins/com.google.android.appbundle/Editor/Scripts/Internal/BuildTools/AndroidSdkPlatform.cs.meta

@@ -0,0 +1,12 @@
+fileFormatVersion: 2
+guid: 36e42f83ed7a745ea9e4f4166d786141
+timeCreated: 1556910452
+licenseType: Pro
+MonoImporter:
+  serializedVersion: 2
+  defaultReferences: []
+  executionOrder: 0
+  icon: {instanceID: 0}
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: 

Assets/GooglePlayPlugins/com.google.android.appbundle/Editor/Scripts/Internal/BuildTools/ApkSigner.cs

@@ -0,0 +1,36 @@
+// Copyright 2018 Google LLC
+//
+// 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.
+
+namespace Google.Android.AppBundle.Editor.Internal.BuildTools
+{
+    /// <summary>
+    /// Provided methods on 2017.4 and earlier that call the Android SDK build tool "apksigner" to verify whether an APK
+    /// complies with <a href="https://source.android.com/security/apksigning/v2">APK Signature Scheme V2</a>.
+    /// </summary>
+    // TODO(b/189958664): Needed for 1.x API compatibility. Should be removed with 2.x.
+    public class ApkSigner : IBuildTool
+    {
+        /// <summary>
+        /// Constructor.
+        /// </summary>
+        public ApkSigner(AndroidBuildTools androidBuildTools, JavaUtils javaUtils)
+        {
+        }
+
+        public virtual bool Initialize(BuildToolLogger buildToolLogger)
+        {
+            return true;
+        }
+    }
+}

Assets/GooglePlayPlugins/com.google.android.appbundle/Editor/Scripts/Internal/BuildTools/ApkSigner.cs.meta

@@ -0,0 +1,12 @@
+fileFormatVersion: 2
+guid: 960e36d9911aa4011958de1e7407757d
+timeCreated: 1556916021
+licenseType: Pro
+MonoImporter:
+  serializedVersion: 2
+  defaultReferences: []
+  executionOrder: 0
+  icon: {instanceID: 0}
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: 

Assets/GooglePlayPlugins/com.google.android.appbundle/Editor/Scripts/Internal/BuildTools/AppBundleBuilder.cs

@@ -0,0 +1,992 @@
+// Copyright 2018 Google LLC
+//
+// 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.
+
+using System;
+using System.Collections.Generic;
+using System.IO;
+using System.Threading;
+using System.Xml.Linq;
+using Google.Android.AppBundle.Editor.Internal.AndroidManifest;
+using Google.Android.AppBundle.Editor.Internal.AssetPacks;
+using Google.Android.AppBundle.Editor.Internal.Config;
+using Google.Android.AppBundle.Editor.Internal.Utils;
+using UnityEditor;
+using UnityEngine;
+
+#if UNITY_2018_4_OR_NEWER && !NET_LEGACY
+using System.Threading.Tasks;
+#endif
+
+namespace Google.Android.AppBundle.Editor.Internal.BuildTools
+{
+    /// <summary>
+    /// Helper to build an Android App Bundle file on Unity.
+    /// </summary>
+    public class AppBundleBuilder : IBuildTool
+    {
+        public delegate void PostBuildCallback(string finishedAabFilePath);
+
+        /// <summary>
+        /// Status for coordinating between the background thread and main thread on async builds.
+        /// </summary>
+        private enum BuildStatus
+        {
+            Running,
+            Failing,
+            Succeeding,
+            Halted
+        }
+
+        private const string AndroidManifestFileName = "AndroidManifest.xml";
+        private const string AssetsDirectoryName = "assets";
+        private const string BundleMetadataDirectoryName = "BUNDLE-METADATA";
+        private const string ManifestDirectoryName = "manifest";
+        private const string RequiredDirectoryName = "assets/bin/Data/Managed";
+        private const string ResourceTableFileName = "resources.pb";
+        private const float ProgressCreateBaseModule = 0.3f;
+        private const float ProgressProcessModules = 0.5f;
+        private const float ProgressRunBundletool = 0.7f;
+        private const int ProgressBarWaitHandleTimeoutMs = 100;
+
+        // For simplicity we use the same filename when building an APK or an AAB.
+        // Note: AAB builds fail if we use a .apk file extension, but APK builds can use any extension.
+        private const string AndroidPlayerFileName = "tmp.aab";
+        private const string AndroidPlayerFilePrefix = "tmp";
+
+        /// <summary>
+        /// The folder where to store the asset pack, inside the "assets" folder of an Android App Bundle module.
+        /// This intermediate folder name can be suffixed with a texture compression format targeting (e.g: #tcf_astc),
+        /// which will be stripped out by bundletool.
+        /// </summary>
+        private const string AssetPackFolder = "assetpack";
+
+        private readonly AndroidAssetPackagingTool _androidAssetPackagingTool;
+        private readonly AndroidBuilder _androidBuilder;
+        private readonly BundletoolHelper _bundletool;
+        private readonly JarSigner _jarSigner;
+        private readonly string _workingDirectoryPath;
+        private readonly ZipUtils _zipUtils;
+
+        private volatile BuildStatus _buildStatus = BuildStatus.Running;
+        private volatile string _progressBarMessage = "";
+        private volatile float _progressBarProgress;
+        private volatile string _buildErrorMessage;
+        private volatile string _finishedAabFilePath;
+        private volatile bool _canceled;
+        private Thread _backgroundThread;
+        private EventWaitHandle _progressBarWaitHandle;
+        private AndroidSdkVersions _minSdkVersion;
+        private string _packageName;
+        private int _versionCode;
+        private string _versionName;
+        private PostBuildCallback _createBundleAsyncOnSuccess = delegate { };
+        private IEnumerable<IAssetPackManifestTransformer> _assetPackManifestTransformers;
+
+        /// <summary>
+        /// Constructor.
+        /// </summary>
+        public AppBundleBuilder(
+            AndroidAssetPackagingTool androidAssetPackagingTool,
+            AndroidBuilder androidBuilder,
+            BundletoolHelper bundletool,
+            JarSigner jarSigner,
+            string workingDirectoryPath,
+            ZipUtils zipUtils)
+        {
+            _androidAssetPackagingTool = androidAssetPackagingTool;
+            _androidBuilder = androidBuilder;
+            _bundletool = bundletool;
+            _jarSigner = jarSigner;
+            _workingDirectoryPath = workingDirectoryPath;
+            _zipUtils = zipUtils;
+        }
+
+        public virtual bool Initialize(BuildToolLogger buildToolLogger)
+        {
+            // Cache information that is only accessible from the main thread.
+            _minSdkVersion = PlayerSettings.Android.minSdkVersion;
+            _packageName = PlayerSettings.GetApplicationIdentifier(BuildTargetGroup.Android);
+            _versionCode = PlayerSettings.Android.bundleVersionCode;
+            _versionName = PlayerSettings.bundleVersion;
+
+            _assetPackManifestTransformers = AssetPackManifestTransformerRegistry.Registry.ConstructInstances();
+            var initializedManifestTransformers = true;
+            foreach (var transformer in _assetPackManifestTransformers)
+            {
+                initializedManifestTransformers &= transformer.Initialize(buildToolLogger);
+            }
+
+            return CheckUnityVersion(buildToolLogger)
+                   && initializedManifestTransformers
+                   && _androidAssetPackagingTool.Initialize(buildToolLogger)
+                   && _androidBuilder.Initialize(buildToolLogger)
+                   && _jarSigner.Initialize(buildToolLogger)
+                   && _bundletool.Initialize(buildToolLogger)
+                   && _zipUtils.Initialize(buildToolLogger);
+        }
+
+        public string WorkingDirectoryPath
+        {
+            get { return _workingDirectoryPath; }
+        }
+
+        private string AndroidPlayerFilePath
+        {
+            get { return Path.Combine(_workingDirectoryPath, AndroidPlayerFileName); }
+        }
+
+        /// <summary>
+        /// Builds an Android Player with the specified options.
+        /// Note: the specified <see cref="BuildPlayerOptions.locationPathName"/> field is ignored and the
+        /// Android Player is written to a temporary file.
+        /// </summary>
+        public virtual AndroidBuildResult BuildAndroidPlayer(BuildPlayerOptions buildPlayerOptions)
+        {
+            var workingDirectory = new DirectoryInfo(_workingDirectoryPath);
+            if (workingDirectory.Exists)
+            {
+                workingDirectory.Delete(true);
+            }
+
+            workingDirectory.Create();
+
+            EditorUserBuildSettings.buildAppBundle = true;
+
+            Debug.LogFormat("Building Android Player: {0}", AndroidPlayerFilePath);
+            // This Android Player is an intermediate build artifact, so use a temporary path for the output file path.
+            var updatedBuildPlayerOptions = new BuildPlayerOptions
+            {
+                assetBundleManifestPath = buildPlayerOptions.assetBundleManifestPath,
+                locationPathName = AndroidPlayerFilePath,
+                options = buildPlayerOptions.options,
+                scenes = buildPlayerOptions.scenes,
+                target = buildPlayerOptions.target,
+                targetGroup = buildPlayerOptions.targetGroup
+            };
+
+            // Do not use BuildAndSign since this signature won't be used.
+            return _androidBuilder.Build(updatedBuildPlayerOptions);
+        }
+
+        /// <summary>
+        /// Synchronously builds an AAB given the specified options and existing Android Player on disk.
+        /// </summary>
+        /// <returns>An error message if there was an error, or null if successful.</returns>
+        public string CreateBundle(CreateBundleOptions options)
+        {
+            if (_buildStatus != BuildStatus.Running)
+            {
+                throw new Exception("Unexpected call to CreateBundle() with status: " + _buildStatus);
+            }
+
+            var moduleDirectoryList = new List<DirectoryInfo>();
+            var workingDirectory = new DirectoryInfo(_workingDirectoryPath);
+
+            var error = CreateAssetModules(moduleDirectoryList, options.AssetPackConfig, workingDirectory);
+            if (error != null)
+            {
+                return error;
+            }
+
+            IList<string> bundleMetadata;
+            error = CreateBaseModules(moduleDirectoryList, options, workingDirectory, out bundleMetadata);
+            if (error != null)
+            {
+                return error;
+            }
+
+            error = CreateBundle(moduleDirectoryList, options, bundleMetadata);
+            if (error != null)
+            {
+                return error;
+            }
+
+            Debug.LogFormat("Finished building app bundle: {0}", options.AabFilePath);
+            _finishedAabFilePath = options.AabFilePath;
+            _buildStatus = BuildStatus.Succeeding;
+            return null;
+        }
+
+        /// <summary>
+        /// Asynchronously builds an AAB at the specified path.
+        /// </summary>
+        /// <param name="aabFilePath">The AAB output file path.</param>
+        /// <param name="assetPackConfig">Asset packs to include in the AAB.</param>
+        /// <param name="onSuccess">
+        /// Callback that fires with the final aab file location, when the bundle creation succeeds.
+        /// </param>
+        public void CreateBundleAsync(CreateBundleOptions options, PostBuildCallback onSuccess)
+        {
+            // Copy the AssetPackConfig before leaving the main thread in case the original is modified later.
+            options.AssetPackConfig = SerializationHelper.DeepCopy(options.AssetPackConfig);
+            _createBundleAsyncOnSuccess = onSuccess;
+            StartCreateBundleAsync(() =>
+            {
+                try
+                {
+                    CreateBundle(options);
+                }
+                catch (ThreadAbortException ex)
+                {
+                    if (!_canceled)
+                    {
+                        // Unexpected ThreadAbortException.
+                        DisplayBuildError("Exception", ex.ToString());
+                    }
+                }
+                catch (Exception ex)
+                {
+                    // Catch and display exceptions since they may otherwise be undetected on a background thread.
+                    DisplayBuildError("Exception", ex.ToString());
+                }
+            });
+        }
+
+#if UNITY_2018_4_OR_NEWER && !NET_LEGACY
+        /// <summary>
+        /// Synchronously builds an Android Player and then produces a final AAB synchronously or asynchronously,
+        /// as specified.
+        /// </summary>
+        /// <param name="androidBuildOptions">Options indicating how to build the AAB, including asset packs.</param>
+        /// <returns>An async task that provides an AndroidBuildReport.</returns>
+        public async Task<AndroidBuildReport> CreateBundleWithTask(AndroidBuildOptions androidBuildOptions)
+        {
+            var taskCompletionSource = new TaskCompletionSource<AndroidBuildReport>();
+            var androidBuildResult = BuildAndroidPlayer(androidBuildOptions.BuildPlayerOptions);
+            if (androidBuildResult.Cancelled)
+            {
+                taskCompletionSource.SetCanceled();
+                return await taskCompletionSource.Task;
+            }
+
+            var androidBuildReport = new AndroidBuildReport(androidBuildResult.Report);
+            if (androidBuildResult.ErrorMessage != null)
+            {
+                taskCompletionSource.SetException(
+                    new AndroidBuildException(androidBuildResult.ErrorMessage, androidBuildReport));
+                return await taskCompletionSource.Task;
+            }
+
+            var createBundleOptions = new CreateBundleOptions
+            {
+                AabFilePath = androidBuildOptions.BuildPlayerOptions.locationPathName,
+                AssetPackConfig = androidBuildOptions.AssetPackConfig ?? new AssetPackConfig(),
+                CompressionOptions = androidBuildOptions.CompressionOptions
+            };
+            if (androidBuildOptions.ForceSingleThreadedBuild || Application.isBatchMode)
+            {
+                CreateBundleInternal(
+                    taskCompletionSource,
+                    () => CreateBundle(createBundleOptions),
+                    androidBuildReport,
+                    androidBuildReport);
+            }
+            else
+            {
+                // Copy the AssetPackConfig while still on the main thread in case the original is modified later.
+                createBundleOptions.AssetPackConfig = SerializationHelper.DeepCopy(createBundleOptions.AssetPackConfig);
+                StartCreateBundleAsync(() =>
+                {
+                    CreateBundleInternal(
+                        taskCompletionSource,
+                        () => CreateBundle(createBundleOptions),
+                        androidBuildReport,
+                        androidBuildReport);
+                });
+            }
+
+            return await taskCompletionSource.Task;
+        }
+
+        /// <summary>
+        /// Builds an Android App Bundle containing only asset packs.
+        /// </summary>
+        public async Task CreateAssetOnlyBundle(AssetOnlyBuildOptions assetOnlyBuildOptions)
+        {
+            var assetOnlyOptions = new AssetOnlyOptions
+            {
+                AppVersions = new List<long>(assetOnlyBuildOptions.AppVersions),
+                AssetVersionTag = assetOnlyBuildOptions.AssetVersionTag
+            };
+
+            var createBundleOptions = new CreateBundleOptions
+            {
+                AabFilePath = assetOnlyBuildOptions.LocationPathName,
+                AssetPackConfig = SerializationHelper.DeepCopy(assetOnlyBuildOptions.AssetPackConfig),
+                AssetOnlyOptions = assetOnlyOptions
+            };
+
+            var completionSource = new TaskCompletionSource<bool>();
+            if (assetOnlyBuildOptions.ForceSingleThreadedBuild || Application.isBatchMode)
+            {
+                CreateBundleInternal(
+                    completionSource,
+                    () => CreateAssetOnlyBundle(createBundleOptions),
+                    true);
+            }
+            else
+            {
+                StartCreateBundleAsync(() =>
+                {
+                    CreateBundleInternal(
+                        completionSource,
+                        () => CreateAssetOnlyBundle(createBundleOptions),
+                        true);
+                });
+            }
+
+            await completionSource.Task;
+        }
+
+        private string CreateAssetOnlyBundle(CreateBundleOptions options)
+        {
+            if (_buildStatus != BuildStatus.Running)
+            {
+                throw new Exception("Unexpected call to CreateAssetOnlyBundle() with status: " + _buildStatus);
+            }
+
+            var moduleDirectoryList = new List<DirectoryInfo>();
+            var workingDirectory = new DirectoryInfo(_workingDirectoryPath);
+
+            var error = CreateAssetModules(moduleDirectoryList, options.AssetPackConfig, workingDirectory);
+            if (error != null)
+            {
+                return error;
+            }
+
+            error = CreateBundle(moduleDirectoryList, options);
+            if (error != null)
+            {
+                return error;
+            }
+
+            Debug.LogFormat("Finished building asset-only app bundle: {0}", options.AabFilePath);
+            _finishedAabFilePath = options.AabFilePath;
+            _buildStatus = BuildStatus.Succeeding;
+            return null;
+        }
+
+        private void CreateBundleInternal<T>(
+            TaskCompletionSource<T> taskCompletionSource,
+            Func<string> createBundleFunc,
+            T successResult,
+            AndroidBuildReport androidBuildReport = null)
+        {
+            try
+            {
+                var errorMessage = createBundleFunc.Invoke();
+                if (errorMessage == null)
+                {
+                    taskCompletionSource.SetResult(successResult);
+                }
+                else
+                {
+                    // Already logged.
+                    taskCompletionSource.SetException(new AndroidBuildException(errorMessage, androidBuildReport));
+                }
+            }
+            catch (ThreadAbortException ex)
+            {
+                if (_canceled)
+                {
+                    taskCompletionSource.SetCanceled();
+                }
+                else
+                {
+                    // Unexpected ThreadAbortException.
+                    taskCompletionSource.SetException(new AndroidBuildException(ex, androidBuildReport));
+                    DisplayBuildError("Exception", ex.ToString());
+                }
+            }
+            catch (Exception ex)
+            {
+                taskCompletionSource.SetException(new AndroidBuildException(ex, androidBuildReport));
+                DisplayBuildError("Exception", ex.ToString());
+            }
+        }
+#endif
+
+        private string CreateBaseModules(IList<DirectoryInfo> moduleDirectoryList, CreateBundleOptions options,
+            DirectoryInfo workingDirectory, out IList<string> bundleMetadata)
+        {
+            // Create base module directory.
+            bundleMetadata = new List<string>();
+            var baseDirectory = workingDirectory.CreateSubdirectory(AndroidAppBundle.BaseModuleName);
+            var baseErrorMessage = CreateBaseModule(baseDirectory, out bundleMetadata);
+            if (baseErrorMessage != null)
+            {
+                // Already displayed the error.
+                return baseErrorMessage;
+            }
+
+            moduleDirectoryList.Add(baseDirectory);
+
+            if (options.AssetPackConfig.SplitBaseModuleAssets)
+            {
+                // Move assets from base module directory to the separate module's directory.
+                var splitBaseDirectory = workingDirectory.CreateSubdirectory(AndroidAppBundle.BaseAssetsModuleName);
+                var splitBaseErrorMessage = CreateSplitBaseModule(baseDirectory, splitBaseDirectory);
+                if (splitBaseErrorMessage != null)
+                {
+                    // Already displayed the error.
+                    return splitBaseErrorMessage;
+                }
+
+                moduleDirectoryList.Add(splitBaseDirectory);
+            }
+
+            return null;
+        }
+
+        private string CreateAssetModules(IList<DirectoryInfo> moduleDirectoryList, AssetPackConfig assetPackConfig,
+            DirectoryInfo workingDirectory)
+        {
+            // Create asset pack module directories.
+            var index = 0;
+            var assetPacks = assetPackConfig.DeliveredAssetPacks;
+            foreach (var entry in assetPacks)
+            {
+                DisplayProgress(
+                    string.Format("Processing asset pack {0} of {1}", index + 1, assetPacks.Count),
+                    Mathf.Lerp(0.1f, ProgressCreateBaseModule, (float)index / assetPacks.Count));
+                index++;
+
+                var assetPackName = entry.Key;
+                var assetPack = entry.Value;
+                var assetPackDirectoryInfo = workingDirectory.CreateSubdirectory(assetPackName);
+                var assetPackErrorMessage = CreateAssetPackModule(assetPackName, assetPack, assetPackDirectoryInfo);
+                if (assetPackErrorMessage != null)
+                {
+                    // Already displayed the error.
+                    return assetPackErrorMessage;
+                }
+
+                moduleDirectoryList.Add(assetPackDirectoryInfo);
+            }
+
+            return null;
+        }
+
+        private string CreateBundle(List<DirectoryInfo> moduleDirectoryList, CreateBundleOptions options,
+            IList<string> bundleMetadata = null)
+        {
+            // Create a ZIP file for each module directory.
+            var moduleFiles = new List<string>();
+            var numModules = moduleDirectoryList.Count;
+            for (var i = 0; i < numModules; i++)
+            {
+                if (numModules == 1)
+                {
+                    DisplayProgress("Processing base module", ProgressProcessModules);
+                }
+                else
+                {
+                    DisplayProgress(
+                        string.Format("Processing module {0} of {1}", i + 1, numModules),
+                        Mathf.Lerp(ProgressProcessModules, ProgressRunBundletool, (float)i / numModules));
+                }
+
+                var moduleDirectoryInfo = moduleDirectoryList[i];
+                var destinationDirectoryInfo = GetDestinationSubdirectory(moduleDirectoryInfo);
+
+                // Create ZIP file path, for example /path/to/files/base becomes /path/to/files/base/base.zip
+                var zipFilePath = Path.Combine(moduleDirectoryInfo.FullName, moduleDirectoryInfo.Name + ".zip");
+                var zipErrorMessage = _zipUtils.CreateZipFile(zipFilePath, destinationDirectoryInfo.FullName, ".");
+                if (zipErrorMessage != null)
+                {
+                    return DisplayBuildError("Zip creation", zipErrorMessage);
+                }
+
+                moduleFiles.Add(zipFilePath);
+            }
+
+            if (bundleMetadata == null)
+            {
+                bundleMetadata = new List<string>();
+            }
+
+            DisplayProgress("Running bundletool", ProgressRunBundletool);
+            var configParams = CreateBuildBundleConfigParams(options);
+            var buildBundleErrorMessage =
+                _bundletool.BuildBundle(options.AabFilePath, moduleFiles, bundleMetadata, configParams);
+            if (buildBundleErrorMessage != null)
+            {
+                return DisplayBuildError("Bundletool", buildBundleErrorMessage);
+            }
+
+            // Only sign the .aab if a custom keystore is configured.
+            if (_jarSigner.UseCustomKeystore)
+            {
+                DisplayProgress("Signing bundle", 0.9f);
+                var signingErrorMessage = _jarSigner.Sign(options.AabFilePath);
+                if (signingErrorMessage != null)
+                {
+                    Debug.LogError("Failed to sign");
+                    return DisplayBuildError("Signing", signingErrorMessage);
+                }
+            }
+            else
+            {
+                Debug.LogFormat("Skipped signing since a Custom Keystore isn't configured in Android Player Settings");
+            }
+
+            MoveSymbolsZipFile(options.AabFilePath);
+
+            return null;
+        }
+
+        private BundletoolHelper.BuildBundleConfigParams CreateBuildBundleConfigParams(CreateBundleOptions options)
+        {
+            var configParams = new BundletoolHelper.BuildBundleConfigParams
+            {
+                defaultTcfSuffix = TextureTargetingTools.GetBundleToolTextureCompressionFormatName(
+                    options.AssetPackConfig.DefaultTextureCompressionFormat),
+                defaultDeviceTier =
+                    DeviceTierTargetingTools.GetBundleToolDeviceTierFormatName(
+                        options.AssetPackConfig.DefaultDeviceTier),
+                minSdkVersion = _minSdkVersion,
+                compressionOptions = options.CompressionOptions ?? new CompressionOptions(),
+                containsInstallTimeAssetPack = options.AssetPackConfig.SplitBaseModuleAssets
+            };
+
+            var assetPacks = options.AssetPackConfig.DeliveredAssetPacks;
+            foreach (var entry in assetPacks)
+            {
+                var assetPackName = entry.Key;
+                var assetPack = entry.Value;
+
+                configParams.enableTcfTargeting |= assetPack.CompressionFormatToAssetBundleFilePath != null;
+                configParams.enableTcfTargeting |= assetPack.CompressionFormatToAssetPackDirectoryPath != null;
+                configParams.enableDeviceTierTargeting |= assetPack.DeviceTierToAssetBundleFilePath != null;
+                configParams.enableDeviceTierTargeting |= assetPack.DeviceTierToAssetPackDirectoryPath != null;
+                configParams.containsInstallTimeAssetPack |=
+                    assetPack.DeliveryMode == AssetPackDeliveryMode.InstallTime;
+            }
+
+            configParams.containsInstallTimeAssetPack |= options.AssetPackConfig.SplitBaseModuleAssets;
+            configParams.assetOnlyOptions = options.AssetOnlyOptions;
+            return configParams;
+        }
+
+        private void StartCreateBundleAsync(ThreadStart threadStart)
+        {
+            _progressBarWaitHandle = new EventWaitHandle(false, EventResetMode.AutoReset);
+            EditorApplication.update += HandleUpdate;
+            _backgroundThread = new Thread(threadStart);
+            _backgroundThread.Name = "AppBundle";
+            _backgroundThread.Start();
+        }
+
+        // Handler for EditorApplication.update callbacks on the main thread.
+        private void HandleUpdate()
+        {
+            switch (_buildStatus)
+            {
+                case BuildStatus.Running:
+                    // Checking for task cancellation during EditorApplication.update is much more responsive
+                    // than only calling DisplayCancelableProgressBar() when the message changes.
+                    if (EditorUtility.DisplayCancelableProgressBar(
+                            "Building App Bundle", _progressBarMessage, _progressBarProgress))
+                    {
+                        Debug.Log("Cancelling app bundle build...");
+                        EditorUtility.ClearProgressBar();
+                        _canceled = true;
+                        _backgroundThread.Abort();
+                        _buildStatus = BuildStatus.Halted;
+                    }
+
+                    // Signal the background thread that we've handled an update since DisplayProgress() was called.
+                    _progressBarWaitHandle.Set();
+                    break;
+                case BuildStatus.Failing:
+                    EditorUtility.ClearProgressBar();
+                    EditorUtility.DisplayDialog(
+                        BuildToolLogger.BuildErrorTitle, _buildErrorMessage, WindowUtils.OkButtonText);
+                    _buildStatus = BuildStatus.Halted;
+                    break;
+                case BuildStatus.Succeeding:
+                    EditorUtility.ClearProgressBar();
+                    _buildStatus = BuildStatus.Halted;
+                    _createBundleAsyncOnSuccess(_finishedAabFilePath);
+                    break;
+                case BuildStatus.Halted:
+                    _progressBarWaitHandle.Close();
+                    EditorApplication.update -= HandleUpdate;
+                    break;
+                default:
+                    throw new Exception("Unexpected BuildStatus: " + _buildStatus);
+            }
+        }
+
+        private string CreateAssetPackModule(
+            string assetPackName, AssetPack assetPack, DirectoryInfo assetPackDirectoryInfo)
+        {
+            var aaptErrorMessage =
+                CreateAssetPackWithManifest(assetPackDirectoryInfo, assetPackName, assetPack.DeliveryMode);
+            if (aaptErrorMessage != null)
+            {
+                // Already displayed the error.
+                return aaptErrorMessage;
+            }
+
+            // Copy all assets to an "assets" subdirectory in the destination folder.
+            var destinationAssetsDirectory =
+                GetDestinationSubdirectory(assetPackDirectoryInfo).CreateSubdirectory(AssetsDirectoryName);
+            if (assetPack.AssetBundleFilePath != null)
+            {
+                // Copy AssetBundle files into the module's "assets" folder, inside an "assetpack" folder.
+                var outputDirectory = destinationAssetsDirectory.CreateSubdirectory(AssetPackFolder).FullName;
+                File.Copy(assetPack.AssetBundleFilePath, Path.Combine(outputDirectory, assetPackName));
+            }
+            else if (assetPack.CompressionFormatToAssetBundleFilePath != null)
+            {
+                // Copy the AssetBundle files into the module's "assets" folder, inside an "assetpack#tcf_xxx" folder.
+                foreach (var compressionAndFilePath in assetPack.CompressionFormatToAssetBundleFilePath)
+                {
+                    var targetedAssetsFolderName =
+                        AssetPackFolder + TextureTargetingTools.GetTargetingSuffix(compressionAndFilePath.Key);
+                    var outputDirectory = destinationAssetsDirectory.CreateSubdirectory(targetedAssetsFolderName);
+                    File.Copy(compressionAndFilePath.Value, Path.Combine(outputDirectory.FullName, assetPackName));
+                }
+            }
+            else if (assetPack.DeviceTierToAssetBundleFilePath != null)
+            {
+                // Copy the AssetBundle files into the module's "assets" folder, inside an "assetpack#tier_xxx" folder.
+                foreach (var deviceTierAndFilePath in assetPack.DeviceTierToAssetBundleFilePath)
+                {
+                    var targetedAssetsFolderName =
+                        AssetPackFolder + DeviceTierTargetingTools.GetTargetingSuffix(deviceTierAndFilePath.Key);
+                    var outputDirectory = destinationAssetsDirectory.CreateSubdirectory(targetedAssetsFolderName);
+                    File.Copy(deviceTierAndFilePath.Value, Path.Combine(outputDirectory.FullName, assetPackName));
+                }
+            }
+            else if (assetPack.AssetPackDirectoryPath != null)
+            {
+                var sourceAssetsDirectory = new DirectoryInfo(assetPack.AssetPackDirectoryPath);
+                if (!sourceAssetsDirectory.Exists)
+                {
+                    // TODO: check this earlier.
+                    return DisplayBuildError("Missing directory for " + assetPackName, sourceAssetsDirectory.FullName);
+                }
+
+                // Copy asset pack files into the module's "assets" folder, inside an "assetpack" folder.
+                var outputDirectory = destinationAssetsDirectory.CreateSubdirectory(AssetPackFolder);
+                CopyFilesRecursively(sourceAssetsDirectory, outputDirectory);
+            }
+            else if (assetPack.CompressionFormatToAssetPackDirectoryPath != null)
+            {
+                // Copy asset pack files into the module's "assets" folder, inside an "assetpack#tcf_xxx" folder.
+                foreach (var compressionAndDirectoryPath in assetPack.CompressionFormatToAssetPackDirectoryPath)
+                {
+                    var sourceAssetsDirectory = new DirectoryInfo(compressionAndDirectoryPath.Value);
+                    if (!sourceAssetsDirectory.Exists)
+                    {
+                        // TODO: check this earlier.
+                        return DisplayBuildError(
+                            "Missing directory for " + assetPackName, sourceAssetsDirectory.FullName);
+                    }
+
+                    var targetedAssetsFolderName =
+                        AssetPackFolder + TextureTargetingTools.GetTargetingSuffix(compressionAndDirectoryPath.Key);
+                    var outputDirectory = destinationAssetsDirectory.CreateSubdirectory(targetedAssetsFolderName);
+                    CopyFilesRecursively(sourceAssetsDirectory, outputDirectory);
+                }
+            }
+            else if (assetPack.DeviceTierToAssetPackDirectoryPath != null)
+            {
+                // Copy asset pack files into the module's "assets" folder, inside an "assetpack#tier_xxx" folder.
+                foreach (var deviceTierAndDirectoryPath in assetPack.DeviceTierToAssetPackDirectoryPath)
+                {
+                    var sourceAssetsDirectory = new DirectoryInfo(deviceTierAndDirectoryPath.Value);
+                    if (!sourceAssetsDirectory.Exists)
+                    {
+                        // TODO: check this earlier.
+                        return DisplayBuildError("Missing directory for " + assetPackName,
+                            sourceAssetsDirectory.FullName);
+                    }
+
+                    var targetedAssetsFolderName =
+                        AssetPackFolder + DeviceTierTargetingTools.GetTargetingSuffix(deviceTierAndDirectoryPath.Key);
+                    var outputDirectory = destinationAssetsDirectory.CreateSubdirectory(targetedAssetsFolderName);
+                    CopyFilesRecursively(sourceAssetsDirectory, outputDirectory);
+                }
+            }
+            else
+            {
+                throw new InvalidOperationException("Missing asset pack files: " + assetPackName);
+            }
+
+            return null;
+        }
+
+        private void MoveSymbolsZipFile(string aabFilePath)
+        {
+            var outputDirectoryPath = Path.GetDirectoryName(aabFilePath);
+            if (_workingDirectoryPath == outputDirectoryPath)
+            {
+                // If the temporary player file and final output file are in the same directory, don't move the symbols.
+                // (This is likely a Build & Run.)
+                return;
+            }
+
+            var symbolsFilePath = Path.Combine(_workingDirectoryPath, GetSymbolsFileName(AndroidPlayerFilePrefix));
+            if (!File.Exists(symbolsFilePath))
+            {
+                // The file won't exist for Mono builds or if EditorUserBuildSettings.androidCreateSymbolsZip is false.
+                return;
+            }
+
+            var outputSymbolsFileName = GetSymbolsFileName(Path.GetFileNameWithoutExtension(aabFilePath));
+            var outputSymbolsFilePath = Path.Combine(outputDirectoryPath, outputSymbolsFileName);
+            if (File.Exists(outputSymbolsFilePath))
+            {
+                // If the symbols file already exists, we need to delete it first.
+                File.Delete(outputSymbolsFilePath);
+            }
+
+            File.Move(symbolsFilePath, outputSymbolsFilePath);
+        }
+
+        private string GetSymbolsFileName(string prefix)
+        {
+            return string.Format("{0}-{1}-v{2}.symbols.zip", prefix, _versionName, _versionCode);
+        }
+
+        private static void CopyFilesRecursively(DirectoryInfo sourceDirectory, DirectoryInfo destinationDirectory)
+        {
+            foreach (var sourceSubdirectory in sourceDirectory.GetDirectories())
+            {
+                var destinationSubdirectory = destinationDirectory.CreateSubdirectory(sourceSubdirectory.Name);
+                CopyFilesRecursively(sourceSubdirectory, destinationSubdirectory);
+            }
+
+            foreach (var file in sourceDirectory.GetFiles())
+            {
+                file.CopyTo(Path.Combine(destinationDirectory.FullName, file.Name), false);
+            }
+        }
+
+        private XDocument CreateAssetPackManifestXDocument(string packName, AssetPackDeliveryMode deliveryMode)
+        {
+            if (_assetPackManifestTransformers == null)
+            {
+                throw new BuildToolNotInitializedException(this);
+            }
+
+            var doc = AssetPackManifestHelper.CreateAssetPackManifestXDocument(
+                _packageName,
+                packName,
+                deliveryMode);
+            foreach (var transformer in _assetPackManifestTransformers)
+            {
+                var error = transformer.Transform(doc);
+                if (!string.IsNullOrEmpty(error))
+                {
+                    DisplayBuildError("AndroidManifest configuration", error);
+                    break;
+                }
+            }
+
+            return doc;
+        }
+
+        private string CreateBaseModule(DirectoryInfo baseWorkingDirectory, out IList<string> bundleMetadata)
+        {
+            DisplayProgress("Creating base module", ProgressCreateBaseModule);
+
+            var sourceDirectoryInfo = baseWorkingDirectory.CreateSubdirectory("source");
+            var unzipErrorMessage = _zipUtils.UnzipFile(AndroidPlayerFilePath, sourceDirectoryInfo.FullName);
+            if (unzipErrorMessage != null)
+            {
+                bundleMetadata = null;
+                return DisplayBuildError("Unzip", unzipErrorMessage);
+            }
+
+            bundleMetadata = GetExistingBundleMetadata(sourceDirectoryInfo);
+
+            var destinationDirectoryInfo = GetDestinationSubdirectory(baseWorkingDirectory);
+            var baseModuleDirectories = sourceDirectoryInfo.GetDirectories(AndroidAppBundle.BaseModuleName);
+            if (baseModuleDirectories.Length != 1)
+            {
+                return DisplayBuildError("Find base directory", sourceDirectoryInfo.FullName);
+            }
+
+            ArrangeFilesForExistingModule(baseModuleDirectories[0], destinationDirectoryInfo);
+            return null;
+        }
+
+        private string CreateSplitBaseModule(DirectoryInfo baseDirectory, DirectoryInfo splitBaseDirectory)
+        {
+            var aaptErrorMessage =
+                CreateAssetPackWithManifest(
+                    splitBaseDirectory, AndroidAppBundle.BaseAssetsModuleName, AssetPackDeliveryMode.InstallTime);
+            if (aaptErrorMessage != null)
+            {
+                // Already displayed the error.
+                return aaptErrorMessage;
+            }
+
+            var baseDestination = GetDestinationSubdirectory(baseDirectory);
+            var baseAssetsDirectories = baseDestination.GetDirectories(AssetsDirectoryName);
+            if (baseAssetsDirectories.Length != 1)
+            {
+                return DisplayBuildError("Find base assets directory",
+                    string.Format("Expected 1 directory but found {0}", baseAssetsDirectories.Length));
+            }
+
+            var splitBaseDestination = GetDestinationSubdirectory(splitBaseDirectory);
+            var splitBaseAssetsPath = Path.Combine(splitBaseDestination.FullName, AssetsDirectoryName);
+            baseAssetsDirectories[0].MoveTo(splitBaseAssetsPath);
+
+            // IL2CPP build crash unless the assets/bin/Data/Managed folder exists in the base apk.
+            // Create an empty file in that folder to ensure that folder is present.
+            var requiredDirPath = Path.Combine(baseDestination.FullName, RequiredDirectoryName);
+            var requiredDirInfo = Directory.CreateDirectory(requiredDirPath);
+            File.Create(Path.Combine(requiredDirInfo.FullName, ".keep_folder")).Close();
+
+            return null;
+        }
+
+        // Don't support certain versions of Unity due to the "Failed to load 'libmain.so'" crash.
+        // See https://github.com/google/play-unity-plugins/issues/80 and
+        // https://issuetracker.unity3d.com/issues/android-app-installed-using-apk-from-app-bundle-option-in-android-studio-fails-to-run
+        private static bool CheckUnityVersion(BuildToolLogger buildToolLogger)
+        {
+#if UNITY_2020_2 || UNITY_2020_3_0 || UNITY_2020_3_1 || UNITY_2020_3_2 || UNITY_2021_1_0 || UNITY_2021_1_1
+            buildToolLogger.DisplayErrorDialog(
+                "Apps built as AABs with this version of Unity may crash at runtime. Upgrade to 2020.3.3f1, 2021.1.2f1, or later to avoid this issue.");
+            return false;
+#else
+            return true;
+#endif
+        }
+
+        private string CreateAssetPackWithManifest(
+            DirectoryInfo rootDirectory, string assetPackName, AssetPackDeliveryMode deliveryMode)
+        {
+            var androidManifestFilePath = Path.Combine(rootDirectory.FullName, AndroidManifestFileName);
+            var assetPackManifestXDocument = CreateAssetPackManifestXDocument(assetPackName, deliveryMode);
+            assetPackManifestXDocument.Save(androidManifestFilePath);
+
+            var source = rootDirectory.CreateSubdirectory("manifest");
+            var aaptErrorMessage = _androidAssetPackagingTool.Link(androidManifestFilePath, source.FullName);
+            if (aaptErrorMessage != null)
+            {
+                return DisplayBuildError("AAPT2 link " + assetPackName, aaptErrorMessage);
+            }
+
+            // aapt2 link creates an empty resource table even though asset packs have no resources.
+            // Bundletool fails if the asset pack has a resources.pb. Only retain the AndroidManifest.xml file.
+            var destination = GetDestinationSubdirectory(rootDirectory);
+            foreach (var sourceFileInfo in source.GetFiles())
+            {
+                if (sourceFileInfo.Name == AndroidManifestFileName)
+                {
+                    var destinationSubdirectory = destination.CreateSubdirectory(ManifestDirectoryName);
+                    sourceFileInfo.MoveTo(Path.Combine(destinationSubdirectory.FullName, sourceFileInfo.Name));
+                }
+            }
+
+            return null;
+        }
+
+        private static void ArrangeFilesForExistingModule(DirectoryInfo source, DirectoryInfo destination)
+        {
+            // Only include the resources.pb file located directly in the source directory.
+            foreach (var sourceFileInfo in source.GetFiles())
+            {
+                if (sourceFileInfo.Name == ResourceTableFileName)
+                {
+                    sourceFileInfo.MoveTo(Path.Combine(destination.FullName, ResourceTableFileName));
+                }
+            }
+
+            // Include all directories located in the source directory.
+            foreach (var sourceDirectoryInfo in source.GetDirectories())
+            {
+                sourceDirectoryInfo.MoveTo(Path.Combine(destination.FullName, sourceDirectoryInfo.Name));
+            }
+        }
+
+        /// <summary>
+        /// Given the root directory of an existing AAB, return a list of all bundle metadata files in the specific
+        /// format expected by bundletool.
+        /// </summary>
+        private static IList<string> GetExistingBundleMetadata(DirectoryInfo rootDirectoryInfo)
+        {
+            var bundleMetadata = new List<string>();
+            var bundleMetadataDirectories = rootDirectoryInfo.GetDirectories(BundleMetadataDirectoryName);
+            if (bundleMetadataDirectories.Length != 1)
+            {
+                return bundleMetadata;
+            }
+
+            // The metadata files are usually one directory deep, but use Directory.GetFiles() since this isn't a given.
+            var bundleMetadataPath = bundleMetadataDirectories[0].FullName;
+            var metadataFiles = Directory.GetFiles(bundleMetadataPath, "*", SearchOption.AllDirectories);
+            foreach (var physicalFile in metadataFiles)
+            {
+                if (physicalFile.Substring(0, bundleMetadataPath.Length) != bundleMetadataPath)
+                {
+                    throw new InvalidOperationException(
+                        "A bundle metadata file doesn't match the expected parent path: " + physicalFile);
+                }
+
+                var startIndex = bundleMetadataPath.Length + 1;
+                var relativePath = physicalFile.Substring(startIndex, physicalFile.Length - startIndex);
+                // Expected format is "<bundle-path>:<physical-file>". "<bundle-path>" uses "/" directory separators.
+                var bundlePath = relativePath.Replace("\\", "/");
+                bundleMetadata.Add(string.Format("{0}:{1}", bundlePath, physicalFile));
+            }
+
+            return bundleMetadata;
+        }
+
+        private static DirectoryInfo GetDestinationSubdirectory(DirectoryInfo directoryInfo)
+        {
+            return directoryInfo.CreateSubdirectory("destination");
+        }
+
+        private void DisplayProgress(string info, float progress)
+        {
+            Debug.LogFormat("{0}...", info);
+            if (_backgroundThread == null)
+            {
+                // Running synchronously in batch mode.
+                return;
+            }
+
+            _progressBarMessage = info;
+            _progressBarProgress = progress;
+
+            // Wait for the main thread to display the message in at least one callback of the update handler.
+            // Give up after a short timeout since this is best effort, and we don't want to block indefinitely.
+            _progressBarWaitHandle.WaitOne(ProgressBarWaitHandleTimeoutMs);
+        }
+
+        private string DisplayBuildError(string errorType, string errorMessage)
+        {
+            if (_buildStatus == BuildStatus.Halted)
+            {
+                // Ignore any errors after we've halted, e.g. if the thread abort causes an exception to be thrown.
+                return null;
+            }
+
+            _buildStatus = BuildStatus.Failing;
+            _buildErrorMessage = string.Format("{0} failed: {1}", errorType, errorMessage);
+            Debug.LogError(_buildErrorMessage);
+            return _buildErrorMessage;
+        }
+    }
+}

Assets/GooglePlayPlugins/com.google.android.appbundle/Editor/Scripts/Internal/BuildTools/AppBundleBuilder.cs.meta

@@ -0,0 +1,12 @@
+fileFormatVersion: 2
+guid: a4ee87517b6d8405f9af0cd4e6d2029e
+timeCreated: 1556919555
+licenseType: Pro
+MonoImporter:
+  serializedVersion: 2
+  defaultReferences: []
+  executionOrder: 0
+  icon: {instanceID: 0}
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: 

Assets/GooglePlayPlugins/com.google.android.appbundle/Editor/Scripts/Internal/BuildTools/AppBundleRunner.cs

@@ -0,0 +1,111 @@
+// Copyright 2019 Google LLC
+//
+// 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.
+
+using System.IO;
+using UnityEditor;
+using UnityEngine;
+
+namespace Google.Android.AppBundle.Editor.Internal.BuildTools
+{
+    /// <summary>
+    /// Helper to build an Android App Bundle file on Unity.
+    /// </summary>
+    public class AppBundleRunner : IBuildTool
+    {
+        private readonly AndroidDebugBridge _adb;
+        private readonly BundletoolHelper _bundletool;
+        private string _packageName;
+
+        /// <summary>
+        /// Constructor.
+        /// </summary>
+        public AppBundleRunner(AndroidDebugBridge adb, BundletoolHelper bundletool)
+        {
+            _adb = adb;
+            _bundletool = bundletool;
+        }
+
+        public virtual bool Initialize(BuildToolLogger buildToolLogger)
+        {
+            _packageName = PlayerSettings.GetApplicationIdentifier(BuildTargetGroup.Android);
+            return _adb.Initialize(buildToolLogger) && _bundletool.Initialize(buildToolLogger);
+        }
+
+        /// <summary>
+        /// Converts the specified app bundle into an apk set file,
+        /// installs the proper apks,
+        /// then runs the app on device.
+        /// Note: This is designed to run in the main thread.
+        /// TODO(b/139089705): Explore running this in a background thread.
+        /// </summary>
+        public void RunBundle(string aabFilePath, BundletoolBuildMode buildMode)
+        {
+            string apkSetFilePath;
+            var errorMessage = ConvertAabToApkSet(aabFilePath, buildMode, out apkSetFilePath);
+            if (errorMessage != null)
+            {
+                DisplayRunError("Creating apk set", errorMessage);
+                return;
+            }
+
+            errorMessage = _bundletool.InstallApkSet(apkSetFilePath, _adb.GetAdbPath());
+            if (errorMessage != null)
+            {
+                DisplayRunError("Installing app bundle", errorMessage);
+                return;
+            }
+
+            Debug.Log("Installing app bundle");
+
+            // TODO(b/138958246): Check the number of devices before launching to display a nicer error message.
+            errorMessage = _adb.LaunchApp(_packageName);
+            if (errorMessage != null)
+            {
+                DisplayRunError("Launching app bundle", errorMessage);
+            }
+
+            Debug.Log("Launching app bundle");
+        }
+
+        /// <summary>
+        /// Converts the specified app bundle into an apk set file.
+        /// </summary>
+        /// <returns>An error message if the operation failed and null otherwise.</returns>
+        public string ConvertAabToApkSet(string aabFilePath, BundletoolBuildMode buildMode, out string apkSetFilePath)
+        {
+            var aabFileDirectory = Path.GetDirectoryName(aabFilePath);
+            if (aabFileDirectory == null)
+            {
+                apkSetFilePath = null;
+                return "App Bundle does not exist at path " + aabFilePath;
+            }
+
+            var apkSetFileName = Path.GetFileNameWithoutExtension(aabFilePath);
+            apkSetFilePath = Path.Combine(aabFileDirectory, apkSetFileName + ".apks");
+            File.Delete(apkSetFilePath);
+
+            // TODO(b/149439143): Set this value to be true regardless of BuildMode once local testing works on instant.
+            var enableLocalTesting = buildMode == BundletoolBuildMode.Persistent;
+
+            return _bundletool.BuildApkSet(aabFilePath, apkSetFilePath, buildMode, enableLocalTesting);
+        }
+
+        // TODO(b/138958246): Display a dialog prompt and/or progress bar.
+        private void DisplayRunError(string errorType, string errorMessage)
+        {
+            var fullErrorMessage = string.Format("{0} failed: {1}", errorType, errorMessage);
+            Debug.LogError(fullErrorMessage);
+        }
+    }
+}

Assets/GooglePlayPlugins/com.google.android.appbundle/Editor/Scripts/Internal/BuildTools/AppBundleRunner.cs.meta

@@ -0,0 +1,12 @@
+fileFormatVersion: 2
+guid: 8103f73350aca4529af9e65605055a8b
+timeCreated: 1540331104
+licenseType: Pro
+MonoImporter:
+  serializedVersion: 2
+  defaultReferences: []
+  executionOrder: 0
+  icon: {instanceID: 0}
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: 

Assets/GooglePlayPlugins/com.google.android.appbundle/Editor/Scripts/Internal/BuildTools/BuildToolLogger.cs

@@ -0,0 +1,103 @@
+// Copyright 2019 Google LLC
+//
+// 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.
+
+using Google.Android.AppBundle.Editor.Internal.Utils;
+using UnityEditor;
+using UnityEngine;
+
+namespace Google.Android.AppBundle.Editor.Internal.BuildTools
+{
+    /// <summary>
+    /// Provides methods for logging errors and/or displaying dialogs if there is a build issue.
+    /// </summary>
+    public class BuildToolLogger
+    {
+        public const string BuildErrorTitle = "Build Error";
+        public const string BuildWarningTitle = "Build Warning";
+
+        /// <summary>
+        /// Returns true if the running instance of Unity is headless (e.g. a command line build),
+        /// and false if it's a normal instance of Unity.
+        /// </summary>
+        public virtual bool IsHeadlessMode()
+        {
+            return WindowUtils.IsHeadlessMode();
+        }
+
+        /// <summary>
+        /// Displays the specified message indicating that a build error occurred. Displays an "OK" button that can
+        /// be used to indicate that the user wants to perform a followup action, e.g. fixing a build setting.
+        /// </summary>
+        /// <returns>True if the user clicks "OK", otherwise false.</returns>
+        public virtual bool DisplayActionableErrorDialog(string message)
+        {
+            Debug.LogErrorFormat("Actionable build error: {0}", message);
+
+            if (IsHeadlessMode())
+            {
+                // During a headless build it isn't possible to prompt to fix the issue, so always return false.
+                return false;
+            }
+
+            return EditorUtility.DisplayDialog(
+                BuildErrorTitle, message, WindowUtils.OkButtonText, WindowUtils.CancelButtonText);
+        }
+
+        /// <summary>
+        /// Displays dialog with an additional option to "Opt out for this session". If the user selects that setting,
+        /// they won't be shown the dialog again until they restart Unity. Instead, the specified message will be logged
+        /// as a warning.
+        ///
+        /// On Unity versions 2019.2 and below, this method displays a normal dialog without the opt out option.
+        /// </summary>
+        /// <param name="message">The message included in the dialog.</param>
+        /// <param name="optOutPreferenceKey">The unique key used to determine if a user has opted out of this dialog.</param>
+        public virtual void DisplayOptOutDialog(string message, string optOutPreferenceKey)
+        {
+            Debug.LogWarningFormat("Build warning: {0}", message);
+            if (IsHeadlessMode())
+            {
+                return;
+            }
+
+#if UNITY_2019_3_OR_NEWER
+            var didOptOut =
+                EditorUtility.GetDialogOptOutDecision(DialogOptOutDecisionType.ForThisSession, optOutPreferenceKey);
+            if (didOptOut)
+            {
+                return;
+            }
+
+
+            EditorUtility.DisplayDialog(BuildWarningTitle, message, WindowUtils.OkButtonText,
+                DialogOptOutDecisionType.ForThisSession, optOutPreferenceKey);
+#else
+            EditorUtility.DisplayDialog(BuildWarningTitle, message, WindowUtils.OkButtonText);
+#endif
+        }
+
+        /// <summary>
+        /// Displays the specified message indicating that a build error occurred.
+        /// </summary>
+        public virtual void DisplayErrorDialog(string message)
+        {
+            Debug.LogErrorFormat("Build error: {0}", message);
+
+            if (!IsHeadlessMode())
+            {
+                EditorUtility.DisplayDialog(BuildErrorTitle, message, WindowUtils.OkButtonText);
+            }
+        }
+    }
+}

Assets/GooglePlayPlugins/com.google.android.appbundle/Editor/Scripts/Internal/BuildTools/BuildToolLogger.cs.meta

@@ -0,0 +1,12 @@
+fileFormatVersion: 2
+guid: 1fb883fe4e14d4d90a8d664e93cb0b81
+timeCreated: 1556899571
+licenseType: Pro
+MonoImporter:
+  serializedVersion: 2
+  defaultReferences: []
+  executionOrder: 0
+  icon: {instanceID: 0}
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: 

Assets/GooglePlayPlugins/com.google.android.appbundle/Editor/Scripts/Internal/BuildTools/BuildToolNotInitializedException.cs

@@ -0,0 +1,32 @@
+// Copyright 2019 Google LLC
+//
+// 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.
+
+using System;
+
+namespace Google.Android.AppBundle.Editor.Internal.BuildTools
+{
+    /// <summary>
+    /// Exception thrown if an <see cref="IBuildTool"/> method is called before <see cref="IBuildTool.Initialize"/>.
+    /// </summary>
+    public class BuildToolNotInitializedException : Exception
+    {
+        /// <summary>
+        /// Constructor.
+        /// </summary>
+        public BuildToolNotInitializedException(IBuildTool buildTool) :
+            base(string.Format("Call {0}.Initialize() before calling this method/property.", buildTool.GetType().Name))
+        {
+        }
+    }
+}

Assets/GooglePlayPlugins/com.google.android.appbundle/Editor/Scripts/Internal/BuildTools/BuildToolNotInitializedException.cs.meta

@@ -0,0 +1,12 @@
+fileFormatVersion: 2
+guid: 09bfd5773b8db4b3ebc596a1c11cae96
+timeCreated: 1556899570
+licenseType: Pro
+MonoImporter:
+  serializedVersion: 2
+  defaultReferences: []
+  executionOrder: 0
+  icon: {instanceID: 0}
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: 

Assets/GooglePlayPlugins/com.google.android.appbundle/Editor/Scripts/Internal/BuildTools/BundletoolConfig.cs

@@ -0,0 +1,115 @@
+// Copyright 2019 Google LLC
+//
+// 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.
+
+using System;
+using System.Collections.Generic;
+
+namespace Google.Android.AppBundle.Editor.Internal.BuildTools
+{
+    /// <summary>
+    /// Provides a C# mirror of
+    /// <a href="https://github.com/google/bundletool/blob/master/src/main/proto/config.proto">BundletoolConfig</a>
+    /// for use with JsonUtility.
+    /// Inner class fields are camelCase to match json style.
+    /// </summary>
+    public static class BundletoolConfig
+    {
+        // Options for installTimeAssetModuleDefaultCompression
+        public const string Unspecified = "UNSPECIFIED";
+        public const string Compressed = "COMPRESSED";
+
+        public const string Abi = "ABI";
+        public const string Language = "LANGUAGE";
+        public const string ScreenDensity = "SCREEN_DENSITY";
+        public const string TextureCompressionFormat = "TEXTURE_COMPRESSION_FORMAT";
+        public const string DeviceTier = "DEVICE_TIER";
+
+
+        // Options for BundleType
+        public const string Regular = "REGULAR";
+        public const string AssetOnly = "ASSET_ONLY";
+
+        [Serializable]
+        public class Config
+        {
+            public Optimizations optimizations = new Optimizations();
+            public Compression compression = new Compression();
+            public string type = Regular;
+            public AssetModulesConfig asset_modules_config = new AssetModulesConfig();
+        }
+
+        [Serializable]
+        public class Optimizations
+        {
+            public SplitsConfig splitsConfig = new SplitsConfig();
+            public UncompressNativeLibraries uncompressNativeLibraries = new UncompressNativeLibraries();
+            public UncompressDexFiles uncompressDexFiles = new UncompressDexFiles();
+            public StandaloneConfig standaloneConfig = new StandaloneConfig();
+        }
+
+        [Serializable]
+        public class SplitsConfig
+        {
+            public List<SplitDimension> splitDimension = new List<SplitDimension>();
+        }
+
+        [Serializable]
+        public class StandaloneConfig
+        {
+            public List<SplitDimension> splitDimension = new List<SplitDimension>();
+            public bool strip64BitLibraries;
+        }
+
+        [Serializable]
+        public class SplitDimension
+        {
+            public string value;
+            public bool negate;
+            public SuffixStripping suffixStripping = new SuffixStripping();
+        }
+
+        [Serializable]
+        public class Compression
+        {
+            public List<string> uncompressedGlob = new List<string>();
+            public string installTimeAssetModuleDefaultCompression = Unspecified;
+        }
+
+        [Serializable]
+        public class UncompressNativeLibraries
+        {
+            public bool enabled;
+        }
+
+        [Serializable]
+        public class UncompressDexFiles
+        {
+            public bool enabled;
+        }
+
+        [Serializable]
+        public class SuffixStripping
+        {
+            public bool enabled;
+            public string defaultSuffix;
+        }
+
+        [Serializable]
+        public class AssetModulesConfig
+        {
+            public List<long> app_version = new List<long>();
+            public string asset_version_tag;
+        }
+    }
+}

Assets/GooglePlayPlugins/com.google.android.appbundle/Editor/Scripts/Internal/BuildTools/BundletoolConfig.cs.meta

@@ -0,0 +1,11 @@
+fileFormatVersion: 2
+guid: f770d51f7cfa14c9da2a31e08a167e73
+MonoImporter:
+  externalObjects: {}
+  serializedVersion: 2
+  defaultReferences: []
+  executionOrder: 0
+  icon: {instanceID: 0}
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: