Reland #39157 (#39798)

dev/devicelab/bin/tasks/gradle_plugin_light_apk_test.dart

@@ -52,7 +52,6 @@ Future<void> main() async {
           'assets/flutter_assets/isolate_snapshot_data',
           'assets/flutter_assets/kernel_blob.bin',
           'assets/flutter_assets/vm_snapshot_data',
-          'lib/armeabi-v7a/libflutter.so',
           // Debug mode intentionally includes `x86` and `x86_64`.
           'lib/x86/libflutter.so',
           'lib/x86_64/libflutter.so',
@@ -79,7 +78,6 @@ Future<void> main() async {
           'assets/flutter_assets/isolate_snapshot_data',
           'assets/flutter_assets/kernel_blob.bin',
           'assets/flutter_assets/vm_snapshot_data',
-          'lib/armeabi-v7a/libflutter.so',
           // Debug mode intentionally includes `x86` and `x86_64`.
           'lib/x86/libflutter.so',
           'lib/x86_64/libflutter.so',

examples/platform_view/android/app/build.gradle

@@ -57,6 +57,6 @@ dependencies {
     testImplementation 'junit:junit:4.12'
     androidTestImplementation 'com.android.support.test:runner:1.0.2'
     androidTestImplementation 'com.android.support.test.espresso:espresso-core:3.0.2'
-    implementation 'com.android.support:appcompat-v7:26.1.0'
-    implementation 'com.android.support:design:26.1.0'
+    implementation 'com.android.support:appcompat-v7:28.0.0'
+    implementation 'com.android.support:design:28.0.0'
 }

packages/flutter_tools/gradle/flutter_proguard_rules.pro

-# Prevents `Fragment and FragmentActivity not found`.
-# TODO(blasten): Remove once we bring the Maven dependencies.
--dontwarn io.flutter.embedding.**
-
 # Build the ephemeral app in a module project.
 # Prevents: Warning: library class <plugin-package> depends on program class io.flutter.plugin.**
 # This is due to plugins (libraries) depending on the embedding (the program jar)

packages/flutter_tools/gradle/resolve_dependencies.gradle

+// Copyright 2019 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+//
+//
+// This script is used to warm the Gradle cache by downloading the Flutter dependencies
+// used during the build. This script is invoked when `flutter precache` is run.
+//
+// Command:
+//  gradle -b <flutter-sdk>packages/flutter_tools/gradle/resolve_dependencies.gradle
+//      resolveDependencies
+//
+// This way, Gradle can run with the `--offline` flag later on to eliminate any
+// network request during the build process.
+//
+// This includes:
+//   1. The embedding
+//   2. libflutter.so
+
+import java.nio.file.Paths
+
+repositories {
+    google()
+    jcenter()
+    maven {
+        url "http://download.flutter.io"
+    }
+}
+
+File flutterRoot = projectDir.parentFile.parentFile.parentFile
+
+assert flutterRoot.isDirectory()
+String engineVersion = Paths.get(flutterRoot.absolutePath, "bin", "internal", "engine.version")
+        .toFile().text.trim()
+
+configurations {
+    flutterRelease.extendsFrom releaseImplementation
+    flutterDebug.extendsFrom debugImplementation
+    flutterProfile.extendsFrom debugImplementation
+}
+
+dependencies {
+    flutterRelease "io.flutter:flutter_embedding_release:1.0.0-$engineVersion"
+    flutterRelease "io.flutter:armeabi_v7a_release:1.0.0-$engineVersion"
+    flutterRelease "io.flutter:arm64_v8a_release:1.0.0-$engineVersion"
+
+    flutterProfile "io.flutter:flutter_embedding_profile:1.0.0-$engineVersion"
+    flutterProfile "io.flutter:armeabi_v7a_profile:1.0.0-$engineVersion"
+    flutterProfile "io.flutter:arm64_v8a_profile:1.0.0-$engineVersion"
+
+    flutterDebug "io.flutter:flutter_embedding_debug:1.0.0-$engineVersion"
+    flutterDebug "io.flutter:armeabi_v7a_debug:1.0.0-$engineVersion"
+    flutterDebug "io.flutter:arm64_v8a_debug:1.0.0-$engineVersion"
+    flutterDebug "io.flutter:x86_debug:1.0.0-$engineVersion"
+    flutterDebug "io.flutter:x86_64_debug:1.0.0-$engineVersion"
+}
+
+task resolveDependencies {
+    configurations.each { configuration ->
+        if (configuration.name.startsWith("flutter")) {
+            configuration.resolve()
+        }
+    }
+}

packages/flutter_tools/lib/executable.dart

@@ -84,7 +84,7 @@ Future<void> main(List<String> args) async {
     LogsCommand(),
     MakeHostAppEditableCommand(),
     PackagesCommand(),
-    PrecacheCommand(),
+    PrecacheCommand(verboseHelp: verboseHelp),
     RunCommand(verboseHelp: verboseHelp),
     ScreenshotCommand(),
     ShellCompletionCommand(),

packages/flutter_tools/lib/src/android/gradle.dart

@@ -149,7 +149,7 @@ Future<void> checkGradleDependencies() async {
     <String>[gradlew, 'dependencies'],
     throwOnError: true,
     workingDirectory: flutterProject.android.hostAppGradleRoot.path,
-    environment: _gradleEnv,
+    environment: gradleEnv,
   );
   androidSdk.reinitialize();
   progress.stop();
@@ -239,13 +239,13 @@ Future<GradleProject> _readGradleProject({bool isLibrary = false}) async {
       <String>[gradlew, if (isLibrary) 'properties' else 'app:properties'],
       throwOnError: true,
       workingDirectory: hostAppGradleRoot.path,
-      environment: _gradleEnv,
+      environment: gradleEnv,
     );
     final RunResult tasksRunResult = await processUtils.run(
       <String>[gradlew, if (isLibrary) 'tasks' else 'app:tasks', '--all', '--console=auto'],
       throwOnError: true,
       workingDirectory: hostAppGradleRoot.path,
-      environment: _gradleEnv,
+      environment: gradleEnv,
     );
     project = GradleProject.fromAppProperties(propertiesRunResult.stdout, tasksRunResult.stdout);
   } catch (exception) {
@@ -324,7 +324,7 @@ Future<String> _initializeGradle(FlutterProject project) async {
     await processUtils.run(
       <String>[gradle, '-v'],
       throwOnError: true,
-      environment: _gradleEnv,
+      environment: gradleEnv,
     );
   } on ProcessException catch (e) {
     final String error = e.toString();
@@ -640,7 +640,7 @@ Future<void> buildGradleAar({
       command,
       workingDirectory: project.android.hostAppGradleRoot.path,
       allowReentrantFlutter: true,
-      environment: _gradleEnv,
+      environment: gradleEnv,
       mapFunction: (String line) {
         // Always print the full line in verbose mode.
         if (logger.isVerbose) {
@@ -678,7 +678,7 @@ Future<void> _buildGradleProjectV1(FlutterProject project) async {
     <String>[fs.file(gradlew).absolute.path, 'build'],
     workingDirectory: project.android.hostAppGradleRoot.path,
     allowReentrantFlutter: true,
-    environment: _gradleEnv,
+    environment: gradleEnv,
   );
   status.stop();
   flutterUsage.sendTiming('build', 'gradle-v1', Duration(milliseconds: sw.elapsedMilliseconds));
@@ -809,7 +809,7 @@ Future<void> _buildGradleProjectV2(
       command,
       workingDirectory: flutterProject.android.hostAppGradleRoot.path,
       allowReentrantFlutter: true,
-      environment: _gradleEnv,
+      environment: gradleEnv,
       // TODO(mklim): if AndroidX warnings are no longer required, this
       // mapFunction and all its associated variabled can be replaced with just
       // `filter: ndkMessagefilter`.
@@ -961,7 +961,8 @@ File findBundleFile(GradleProject project, BuildInfo buildInfo) {
   return null;
 }
 
-Map<String, String> get _gradleEnv {
+/// The environment variables needed to run Gradle.
+Map<String, String> get gradleEnv {
   final Map<String, String> env = Map<String, String>.from(platform.environment);
   if (javaPath != null) {
     // Use java bundled with Android Studio.

packages/flutter_tools/lib/src/commands/build_aar.dart

@@ -9,7 +9,7 @@ import '../base/os.dart';
 import '../build_info.dart';
 import '../project.dart';
 import '../reporting/reporting.dart';
-import '../runner/flutter_command.dart' show DevelopmentArtifact, FlutterCommandResult;
+import '../runner/flutter_command.dart' show FlutterCommandResult;
 import 'build.dart';
 
 class BuildAarCommand extends BuildSubCommand {
@@ -52,12 +52,6 @@ class BuildAarCommand extends BuildSubCommand {
     return usage;
   }
 
-  @override
-  Future<Set<DevelopmentArtifact>> get requiredArtifacts async => const <DevelopmentArtifact>{
-    DevelopmentArtifact.universal,
-    DevelopmentArtifact.android,
-  };
-
   @override
   final String description = 'Build a repository containing an AAR and a POM file.\n\n'
       'The POM file is used to include the dependencies that the AAR was compiled against.\n\n'

packages/flutter_tools/lib/src/commands/build_apk.dart

@@ -10,7 +10,7 @@ import '../build_info.dart';
 import '../globals.dart';
 import '../project.dart';
 import '../reporting/reporting.dart';
-import '../runner/flutter_command.dart' show DevelopmentArtifact, FlutterCommandResult;
+import '../runner/flutter_command.dart' show FlutterCommandResult;
 import 'build.dart';
 
 class BuildApkCommand extends BuildSubCommand {
@@ -69,12 +69,6 @@ class BuildApkCommand extends BuildSubCommand {
     return usage;
   }
 
-  @override
-  Future<Set<DevelopmentArtifact>> get requiredArtifacts async => const <DevelopmentArtifact>{
-    DevelopmentArtifact.universal,
-    DevelopmentArtifact.android,
-  };
-
   @override
   Future<FlutterCommandResult> runCommand() async {
     final BuildInfo buildInfo = getBuildInfo();

packages/flutter_tools/lib/src/commands/doctor.dart

@@ -37,7 +37,7 @@ class DoctorCommand extends FlutterCommand {
       // This is required because we use gen_snapshot to check if the host
       // machine can execute the provided artifacts. See `_genSnapshotRuns`
       // in `doctor.dart`.
-      DevelopmentArtifact.android,
+      DevelopmentArtifact.androidGenSnapshot,
     };
   }
 

packages/flutter_tools/lib/src/commands/precache.dart

@@ -10,13 +10,23 @@ import '../runner/flutter_command.dart';
 import '../version.dart';
 
 class PrecacheCommand extends FlutterCommand {
-  PrecacheCommand() {
+  PrecacheCommand({bool verboseHelp = false}) {
     argParser.addFlag('all-platforms', abbr: 'a', negatable: false,
         help: 'Precache artifacts for all host platforms.');
     argParser.addFlag('force', abbr: 'f', negatable: false,
         help: 'Force downloading of artifacts.');
     argParser.addFlag('android', negatable: true, defaultsTo: true,
-        help: 'Precache artifacts for Android development.');
+        help: 'Precache artifacts for Android development.',
+        hide: verboseHelp);
+    argParser.addFlag('android_gen_snapshot', negatable: true, defaultsTo: true,
+        help: 'Precache gen_snapshot for Android development.',
+        hide: !verboseHelp);
+    argParser.addFlag('android_maven', negatable: true, defaultsTo: true,
+        help: 'Precache Gradle dependencies for Android development.',
+        hide: !verboseHelp);
+    argParser.addFlag('android_internal_build', negatable: true, defaultsTo: false,
+        help: 'Precache dependencies for internal Android development.',
+        hide: !verboseHelp);
     argParser.addFlag('ios', negatable: true, defaultsTo: true,
         help: 'Precache artifacts for iOS development.');
     argParser.addFlag('web', negatable: true, defaultsTo: false,
@@ -58,6 +68,10 @@ class PrecacheCommand extends FlutterCommand {
       if (argResults[artifact.name]) {
         requiredArtifacts.add(artifact);
       }
+      // The `android` flag expands to android_gen_snapshot, android_maven, android_internal_build.
+      if (artifact.name.startsWith('android_') && argResults['android']) {
+        requiredArtifacts.add(artifact);
+      }
     }
     final bool forceUpdate = argResults['force'];
     if (forceUpdate || !cache.isUpToDate()) {

packages/flutter_tools/lib/src/commands/upgrade.dart

@@ -10,6 +10,7 @@ import '../base/common.dart';
 import '../base/file_system.dart';
 import '../base/io.dart';
 import '../base/os.dart';
+import '../base/platform.dart';
 import '../base/process.dart';
 import '../cache.dart';
 import '../dart/pub.dart';
@@ -130,6 +131,7 @@ class UpgradeCommandRunner {
       ],
       workingDirectory: Cache.flutterRoot,
       allowReentrantFlutter: true,
+      environment: platform.environment,
     );
     if (code != 0) {
       throwToolExit(null, exitCode: code);
@@ -248,6 +250,7 @@ class UpgradeCommandRunner {
       ],
       workingDirectory: Cache.flutterRoot,
       allowReentrantFlutter: true,
+      environment: platform.environment,
     );
     if (code != 0) {
       throwToolExit(null, exitCode: code);

packages/flutter_tools/lib/src/runner/flutter_command.dart

@@ -676,7 +676,7 @@ DevelopmentArtifact _artifactFromTargetPlatform(TargetPlatform targetPlatform) {
     case TargetPlatform.android_arm64:
     case TargetPlatform.android_x64:
     case TargetPlatform.android_x86:
-      return DevelopmentArtifact.android;
+      return DevelopmentArtifact.androidGenSnapshot;
     case TargetPlatform.web_javascript:
       return DevelopmentArtifact.web;
     case TargetPlatform.ios:

packages/flutter_tools/templates/module/android/host_app_common/app.tmpl/build.gradle.tmpl

@@ -47,9 +47,9 @@ dependencies {
     androidTestImplementation 'androidx.test.espresso:espresso-core:3.1.1'
     {{/androidX}}
     {{^androidX}}
-    implementation 'com.android.support:appcompat-v7:27.1.1'
+    implementation 'com.android.support:appcompat-v7:28.0.0'
     implementation 'com.android.support.constraint:constraint-layout:1.1.2'
-    implementation 'com.android.support:design:27.1.1'
+    implementation 'com.android.support:design:28.0.0'
     androidTestImplementation 'com.android.support.test:runner:1.0.2'
     androidTestImplementation 'com.android.support.test.espresso:espresso-core:3.0.2'
     {{/androidX}}

packages/flutter_tools/test/general.shard/cache_test.dart

@@ -8,8 +8,11 @@ import 'package:file_testing/file_testing.dart';
 import 'package:meta/meta.dart';
 import 'package:mockito/mockito.dart';
 import 'package:platform/platform.dart';
+import 'package:process/process.dart';
 
+import 'package:flutter_tools/src/android/gradle.dart';
 import 'package:flutter_tools/src/base/common.dart';
+import 'package:flutter_tools/src/base/io.dart';
 import 'package:flutter_tools/src/cache.dart';
 import 'package:flutter_tools/src/base/file_system.dart';
 import 'package:flutter_tools/src/base/io.dart' show InternetAddress, SocketException;
@@ -136,18 +139,30 @@ void main() {
       when(artifact1.isUpToDate()).thenReturn(true);
       when(artifact2.isUpToDate()).thenReturn(false);
       final Cache cache = Cache(artifacts: <CachedArtifact>[artifact1, artifact2]);
-      await cache.updateAll(<DevelopmentArtifact>{});
-      verifyNever(artifact1.update(<DevelopmentArtifact>{}));
-      verify(artifact2.update(<DevelopmentArtifact>{}));
+      await cache.updateAll(<DevelopmentArtifact>{
+        null,
+      });
+      verifyNever(artifact1.update());
+      verify(artifact2.update());
     });
     testUsingContext('getter dyLdLibEntry concatenates the output of each artifact\'s dyLdLibEntry getter', () async {
-      final CachedArtifact artifact1 = MockCachedArtifact();
-      final CachedArtifact artifact2 = MockCachedArtifact();
-      final CachedArtifact artifact3 = MockCachedArtifact();
-      when(artifact1.dyLdLibPath).thenReturn('/path/to/alpha:/path/to/beta');
-      when(artifact2.dyLdLibPath).thenReturn('/path/to/gamma:/path/to/delta:/path/to/epsilon');
-      when(artifact3.dyLdLibPath).thenReturn(''); // Empty output
+      final IosUsbArtifacts artifact1 = MockIosUsbArtifacts();
+      final IosUsbArtifacts artifact2 = MockIosUsbArtifacts();
+      final IosUsbArtifacts artifact3 = MockIosUsbArtifacts();
+      when(artifact1.environment)
+          .thenReturn(<String, String>{
+            'DYLD_LIBRARY_PATH': '/path/to/alpha:/path/to/beta',
+          });
+      when(artifact2.environment)
+          .thenReturn(<String, String>{
+            'DYLD_LIBRARY_PATH': '/path/to/gamma:/path/to/delta:/path/to/epsilon',
+          });
+      when(artifact3.environment)
+          .thenReturn(<String, String>{
+            'DYLD_LIBRARY_PATH': '',
+          });
       final Cache cache = Cache(artifacts: <CachedArtifact>[artifact1, artifact2, artifact3]);
+
       expect(cache.dyLdLibEntry.key, 'DYLD_LIBRARY_PATH');
       expect(
         cache.dyLdLibEntry.value,
@@ -163,18 +178,20 @@ void main() {
       when(artifact2.isUpToDate()).thenReturn(false);
       final MockInternetAddress address = MockInternetAddress();
       when(address.host).thenReturn('storage.googleapis.com');
-      when(artifact1.update(<DevelopmentArtifact>{})).thenThrow(SocketException(
+      when(artifact1.update()).thenThrow(SocketException(
         'Connection reset by peer',
         address: address,
       ));
       final Cache cache = Cache(artifacts: <CachedArtifact>[artifact1, artifact2]);
       try {
-        await cache.updateAll(<DevelopmentArtifact>{});
+        await cache.updateAll(<DevelopmentArtifact>{
+          null,
+        });
         fail('Mock thrown exception expected');
       } catch (e) {
-        verify(artifact1.update(<DevelopmentArtifact>{}));
+        verify(artifact1.update());
         // Don't continue when retrieval fails.
-        verifyNever(artifact2.update(<DevelopmentArtifact>{}));
+        verifyNever(artifact2.update());
         expect(
           testLogger.errorText,
           contains('https://flutter.dev/community/china'),
@@ -226,6 +243,7 @@ void main() {
         binaryDirs: <List<String>>[
           <String>['bin_dir', 'unused_url_path'],
         ],
+        requiredArtifacts: DevelopmentArtifact.universal,
       );
       await artifact.updateInner();
       final Directory dir = memoryFileSystem.systemTempDirectory
@@ -244,25 +262,53 @@ void main() {
     });
   });
 
-  testUsingContext('throws tool exit on fs exception', () async {
-    final FakeCachedArtifact fakeCachedArtifact = FakeCachedArtifact(
-      cache: MockCache(),
-      requiredArtifacts: <DevelopmentArtifact>{
-        DevelopmentArtifact.android,
-      }
-    );
-    final Directory mockDirectory = MockDirectory();
-    when(fakeCachedArtifact.cache.getArtifactDirectory(any))
-        .thenReturn(mockDirectory);
-    when(mockDirectory.existsSync()).thenReturn(false);
-    when(mockDirectory.createSync(recursive: true))
-        .thenThrow(const FileSystemException());
-
-    expect(() => fakeCachedArtifact.update(<DevelopmentArtifact>{
-        DevelopmentArtifact.android,
-    }), throwsA(isInstanceOf<ToolExit>()));
+  group('AndroidMavenArtifacts', () {
+    MemoryFileSystem memoryFileSystem;
+    MockProcessManager processManager;
+    MockCache mockCache;
+
+    setUp(() {
+      memoryFileSystem = MemoryFileSystem();
+      processManager = MockProcessManager();
+      mockCache = MockCache();
+    });
+
+    test('development artifact', () async {
+      final AndroidMavenArtifacts mavenArtifacts = AndroidMavenArtifacts();
+      expect(mavenArtifacts.developmentArtifact, DevelopmentArtifact.androidMaven);
+    });
+
+    testUsingContext('update', () async {
+      final AndroidMavenArtifacts mavenArtifacts = AndroidMavenArtifacts();
+      expect(mavenArtifacts.isUpToDate(), isFalse);
+
+      final Directory gradleWrapperDir = fs.systemTempDirectory.createTempSync('gradle_wrapper.');
+      when(mockCache.getArtifactDirectory('gradle_wrapper')).thenReturn(gradleWrapperDir);
+
+      fs.directory(gradleWrapperDir.childDirectory('gradle').childDirectory('wrapper'))
+          .createSync(recursive: true);
+      fs.file(fs.path.join(gradleWrapperDir.path, 'gradlew')).writeAsStringSync('irrelevant');
+      fs.file(fs.path.join(gradleWrapperDir.path, 'gradlew.bat')).writeAsStringSync('irrelevant');
+
+      when(processManager.run(any, environment: captureAnyNamed('environment')))
+        .thenAnswer((Invocation invocation) {
+          final List<String> args = invocation.positionalArguments[0];
+          expect(args.length, 6);
+          expect(args[1], '-b');
+          expect(args[2].endsWith('resolve_dependencies.gradle'), isTrue);
+          expect(args[5], 'resolveDependencies');
+          expect(invocation.namedArguments[#environment], gradleEnv);
+          return Future<ProcessResult>.value(ProcessResult(0, 0, '', ''));
+        });
+
+      await mavenArtifacts.update();
+
+      expect(mavenArtifacts.isUpToDate(), isFalse);
     }, overrides: <Type, Generator>{
-    FileSystem: () => MemoryFileSystem(),
+      Cache: ()=> mockCache,
+      FileSystem: () => memoryFileSystem,
+      ProcessManager: () => processManager,
+    });
   });
 }
 
@@ -270,7 +316,7 @@ class FakeCachedArtifact extends EngineCachedArtifact {
   FakeCachedArtifact({
     String stampName = 'STAMP',
     @required Cache cache,
-    Set<DevelopmentArtifact> requiredArtifacts = const <DevelopmentArtifact>{},
+    DevelopmentArtifact requiredArtifacts,
     this.binaryDirs = const <List<String>>[],
     this.licenseDirs = const <String>[],
     this.packageDirs = const <String>[],
@@ -290,12 +336,14 @@ class FakeCachedArtifact extends EngineCachedArtifact {
   List<String> getPackageDirs() => packageDirs;
 }
 
+class MockProcessManager extends Mock implements ProcessManager {}
 class MockFileSystem extends Mock implements FileSystem {}
 class MockFile extends Mock implements File {}
 class MockDirectory extends Mock implements Directory {}
 
 class MockRandomAccessFile extends Mock implements RandomAccessFile {}
 class MockCachedArtifact extends Mock implements CachedArtifact {}
+class MockIosUsbArtifacts extends Mock implements IosUsbArtifacts {}
 class MockInternetAddress extends Mock implements InternetAddress {}
 class MockCache extends Mock implements Cache {}
 class MockOperatingSystemUtils extends Mock implements OperatingSystemUtils {}

packages/flutter_tools/test/general.shard/commands/precache_test.dart

@@ -27,12 +27,24 @@ void main() {
       final PrecacheCommand command = PrecacheCommand();
       applyMocksToCommand(command);
       await createTestCommandRunner(command).run(
-        const <String>['precache', '--ios', '--android', '--web', '--macos', '--linux', '--windows', '--fuchsia', '--flutter_runner']
+        const <String>[
+          'precache',
+          '--ios',
+          '--android',
+          '--web',
+          '--macos',
+          '--linux',
+          '--windows',
+          '--fuchsia',
+          '--flutter_runner',
+        ]
       );
       expect(artifacts, unorderedEquals(<DevelopmentArtifact>{
         DevelopmentArtifact.universal,
         DevelopmentArtifact.iOS,
-        DevelopmentArtifact.android,
+        DevelopmentArtifact.androidGenSnapshot,
+        DevelopmentArtifact.androidMaven,
+        DevelopmentArtifact.androidInternalBuild,
         DevelopmentArtifact.web,
         DevelopmentArtifact.macOS,
         DevelopmentArtifact.linux,
@@ -44,6 +56,54 @@ void main() {
       Cache: () => cache,
     });
 
+    testUsingContext('Expands android artifacts when the android flag is used', () async {
+      // Release lock between test cases.
+      Cache.releaseLockEarly();
+
+      final PrecacheCommand command = PrecacheCommand();
+      applyMocksToCommand(command);
+      await createTestCommandRunner(command).run(
+        const <String>[
+          'precache',
+          '--no-ios',
+          '--android',
+        ]
+      );
+      expect(artifacts, unorderedEquals(<DevelopmentArtifact>{
+        DevelopmentArtifact.universal,
+        DevelopmentArtifact.androidGenSnapshot,
+        DevelopmentArtifact.androidMaven,
+        DevelopmentArtifact.androidInternalBuild,
+      }));
+    }, overrides: <Type, Generator>{
+      Cache: () => cache,
+    });
+
+    testUsingContext('Adds artifact flags to requested android artifacts', () async {
+      // Release lock between test cases.
+      Cache.releaseLockEarly();
+
+      final PrecacheCommand command = PrecacheCommand();
+      applyMocksToCommand(command);
+      await createTestCommandRunner(command).run(
+        const <String>[
+          'precache',
+          '--no-ios',
+          '--android_gen_snapshot',
+          '--android_maven',
+          '--android_internal_build',
+        ]
+      );
+      expect(artifacts, unorderedEquals(<DevelopmentArtifact>{
+        DevelopmentArtifact.universal,
+        DevelopmentArtifact.androidGenSnapshot,
+        DevelopmentArtifact.androidMaven,
+        DevelopmentArtifact.androidInternalBuild,
+      }));
+    }, overrides: <Type, Generator>{
+      Cache: () => cache,
+    });
+
     final MockFlutterVersion flutterVersion = MockFlutterVersion();
     when(flutterVersion.isMaster).thenReturn(false);
 
@@ -53,18 +113,31 @@ void main() {
       final PrecacheCommand command = PrecacheCommand();
       applyMocksToCommand(command);
       await createTestCommandRunner(command).run(
-       const <String>['precache', '--ios', '--android', '--web', '--macos', '--linux', '--windows', '--fuchsia', '--flutter_runner']
+        const <String>[
+         'precache',
+         '--ios',
+         '--android_gen_snapshot',
+         '--android_maven',
+         '--android_internal_build',
+         '--web',
+         '--macos',
+         '--linux',
+         '--windows',
+         '--fuchsia',
+         '--flutter_runner',
+        ]
       );
       expect(artifacts, unorderedEquals(<DevelopmentArtifact>{
         DevelopmentArtifact.universal,
         DevelopmentArtifact.iOS,
-       DevelopmentArtifact.android,
+        DevelopmentArtifact.androidGenSnapshot,
+        DevelopmentArtifact.androidMaven,
+        DevelopmentArtifact.androidInternalBuild,
       }));
     }, overrides: <Type, Generator>{
       Cache: () => cache,
       FlutterVersion: () => flutterVersion,
     });
-
     testUsingContext('Downloads artifacts when --force is provided', () async {
       when(cache.isUpToDate()).thenReturn(true);
       // Release lock between test cases.
@@ -75,7 +148,9 @@ void main() {
       expect(artifacts, unorderedEquals(<DevelopmentArtifact>{
         DevelopmentArtifact.universal,
         DevelopmentArtifact.iOS,
-       DevelopmentArtifact.android,
+        DevelopmentArtifact.androidGenSnapshot,
+        DevelopmentArtifact.androidMaven,
+        DevelopmentArtifact.androidInternalBuild,
       }));
     }, overrides: <Type, Generator>{
       Cache: () => cache,

packages/flutter_tools/test/general.shard/commands/run_test.dart

@@ -138,7 +138,7 @@ void main() {
 
       expect(await RunCommand().requiredArtifacts, unorderedEquals(<DevelopmentArtifact>{
         DevelopmentArtifact.universal,
-        DevelopmentArtifact.android,
+        DevelopmentArtifact.androidGenSnapshot,
       }));
 
       when(mockDeviceManager.getDevices()).thenAnswer((Invocation invocation) {
@@ -162,7 +162,7 @@ void main() {
       expect(await RunCommand().requiredArtifacts, unorderedEquals(<DevelopmentArtifact>{
         DevelopmentArtifact.universal,
         DevelopmentArtifact.iOS,
-        DevelopmentArtifact.android,
+        DevelopmentArtifact.androidGenSnapshot,
       }));
 
       when(mockDeviceManager.getDevices()).thenAnswer((Invocation invocation) {

packages/flutter_tools/test/general.shard/commands/upgrade_test.dart

@@ -5,12 +5,14 @@
 import 'package:flutter_tools/src/base/common.dart';
 import 'package:flutter_tools/src/base/file_system.dart';
 import 'package:flutter_tools/src/base/io.dart';
+import 'package:flutter_tools/src/base/platform.dart';
 import 'package:flutter_tools/src/base/os.dart';
 import 'package:flutter_tools/src/cache.dart';
 import 'package:flutter_tools/src/commands/upgrade.dart';
 import 'package:flutter_tools/src/runner/flutter_command.dart';
 import 'package:flutter_tools/src/version.dart';
 import 'package:mockito/mockito.dart';
+import 'package:platform/platform.dart';
 import 'package:process/process.dart';
 
 import '../../src/common.dart';
@@ -22,6 +24,7 @@ void main() {
     FakeUpgradeCommandRunner fakeCommandRunner;
     UpgradeCommandRunner realCommandRunner;
     MockProcessManager processManager;
+    FakePlatform fakePlatform;
     final MockFlutterVersion flutterVersion = MockFlutterVersion();
     const GitTagVersion gitTagVersion = GitTagVersion(1, 2, 3, 4, 5, 'asd');
     when(flutterVersion.channel).thenReturn('dev');
@@ -43,9 +46,13 @@ void main() {
         return Future<Process>.value(createMockProcess());
       });
       fakeCommandRunner.willHaveUncomittedChanges = false;
+      fakePlatform = FakePlatform()..environment = <String, String>{
+        'ENV1': 'irrelevant',
+        'ENV2': 'irrelevant',
+      };
     });
 
-    test('throws on unknown tag, official branch,  noforce', () async {
+    testUsingContext('throws on unknown tag, official branch,  noforce', () async {
       final Future<FlutterCommandResult> result = fakeCommandRunner.runCommand(
         false,
         false,
@@ -53,6 +60,8 @@ void main() {
         flutterVersion,
       );
       expect(result, throwsA(isInstanceOf<ToolExit>()));
+    }, overrides: <Type, Generator>{
+      Platform: () => fakePlatform,
     });
 
     testUsingContext('does not throw on unknown tag, official branch, force', () async {
@@ -65,9 +74,10 @@ void main() {
       expect(await result, null);
     }, overrides: <Type, Generator>{
       ProcessManager: () => processManager,
+      Platform: () => fakePlatform,
     });
 
-    test('throws tool exit with uncommitted changes', () async {
+    testUsingContext('throws tool exit with uncommitted changes', () async {
       fakeCommandRunner.willHaveUncomittedChanges = true;
       final Future<FlutterCommandResult> result = fakeCommandRunner.runCommand(
         false,
@@ -76,6 +86,8 @@ void main() {
         flutterVersion,
       );
       expect(result, throwsA(isA<ToolExit>()));
+    }, overrides: <Type, Generator>{
+      Platform: () => fakePlatform,
     });
 
     testUsingContext('does not throw tool exit with uncommitted changes and force', () async {
@@ -90,6 +102,7 @@ void main() {
       expect(await result, null);
     }, overrides: <Type, Generator>{
       ProcessManager: () => processManager,
+      Platform: () => fakePlatform,
     });
 
     testUsingContext('Doesn\'t throw on known tag, dev branch, no force', () async {
@@ -102,6 +115,7 @@ void main() {
       expect(await result, null);
     }, overrides: <Type, Generator>{
       ProcessManager: () => processManager,
+      Platform: () => fakePlatform,
     });
 
     testUsingContext('verifyUpstreamConfigured', () async {
@@ -116,6 +130,57 @@ void main() {
       await realCommandRunner.verifyUpstreamConfigured();
     }, overrides: <Type, Generator>{
       ProcessManager: () => processManager,
+      Platform: () => fakePlatform,
+    });
+
+    testUsingContext('flutterUpgradeContinue passes env variables to child process', () async {
+      await realCommandRunner.flutterUpgradeContinue();
+
+      final VerificationResult result = verify(processManager.start(
+        <String>[
+          fs.path.join('bin', 'flutter'),
+          'upgrade',
+          '--continue',
+          '--no-version-check',
+        ],
+        environment: captureAnyNamed('environment'),
+        workingDirectory: anyNamed('workingDirectory'),
+      ));
+
+      expect(result.captured.first, fakePlatform.environment);
+    }, overrides: <Type, Generator>{
+      ProcessManager: () => processManager,
+      Platform: () => fakePlatform,
+    });
+
+    testUsingContext('precacheArtifacts passes env variables to child process', () async {
+      final List<String> precacheCommand = <String>[
+        fs.path.join('bin', 'flutter'),
+        '--no-color',
+        '--no-version-check',
+        'precache',
+      ];
+
+      when(processManager.start(
+        precacheCommand,
+        environment: anyNamed('environment'),
+        workingDirectory: anyNamed('workingDirectory'),
+      )).thenAnswer((Invocation invocation) async {
+        return Future<Process>.value(createMockProcess());
+      });
+
+      await realCommandRunner.precacheArtifacts();
+
+      final VerificationResult result = verify(processManager.start(
+        precacheCommand,
+        environment: captureAnyNamed('environment'),
+        workingDirectory: anyNamed('workingDirectory'),
+      ));
+
+      expect(result.captured.first, fakePlatform.environment);
+    }, overrides: <Type, Generator>{
+      ProcessManager: () => processManager,
+      Platform: () => fakePlatform,
     });
   });