[flutter_tools] refactor AotBuilder, removing globals and duplicated kernel compilation (#52896)

Reland of #52091

packages/flutter_tools/lib/src/aot.dart

@@ -6,15 +6,18 @@ import 'dart:async';
 
 import 'package:meta/meta.dart';
 
-import 'base/build.dart';
 import 'base/common.dart';
-import 'base/io.dart';
 import 'base/logger.dart';
-import 'base/process.dart';
 import 'build_info.dart';
-import 'dart/package_map.dart';
+import 'build_system/build_system.dart';
+import 'build_system/targets/dart.dart';
+import 'build_system/targets/icon_tree_shaker.dart';
+import 'build_system/targets/ios.dart';
+import 'cache.dart';
+import 'convert.dart';
 import 'globals.dart' as globals;
 import 'ios/bitcode.dart';
+import 'project.dart';
 
 /// Builds AOT snapshots given a platform, build mode and a path to a Dart
 /// library.
@@ -26,18 +29,41 @@ class AotBuilder {
     @required String mainDartFile,
     bool bitcode = kBitcodeEnabledDefault,
     bool quiet = true,
-    bool reportTimings = false,
     Iterable<DarwinArch> iosBuildArchs = defaultIOSArchs,
   }) async {
     if (platform == null) {
       throwToolExit('No AOT build platform specified');
     }
-
-    if (bitcode) {
-      if (platform != TargetPlatform.ios) {
-        throwToolExit('Bitcode is only supported on iOS (TargetPlatform is $platform).');
-      }
-      await validateBitcode(buildInfo.mode, platform);
+    Target target;
+    bool expectSo = false;
+    switch (platform) {
+      case TargetPlatform.android:
+      case TargetPlatform.darwin_x64:
+      case TargetPlatform.linux_x64:
+      case TargetPlatform.windows_x64:
+      case TargetPlatform.fuchsia_arm64:
+      case TargetPlatform.tester:
+      case TargetPlatform.web_javascript:
+      case TargetPlatform.android_x86:
+        throwToolExit('$platform is not supported in AOT.');
+        break;
+      case TargetPlatform.fuchsia_x64:
+        throwToolExit(
+          "To build release for fuchsia, use 'flutter build fuchsia --release'"
+        );
+        break;
+      case TargetPlatform.ios:
+        target = buildInfo.isRelease
+          ? const AotAssemblyRelease()
+          : const AotAssemblyProfile();
+        break;
+      case TargetPlatform.android_arm:
+      case TargetPlatform.android_arm64:
+      case TargetPlatform.android_x64:
+        expectSo = true;
+        target = buildInfo.isRelease
+          ? const AotElfRelease()
+          : const AotElfProfile();
     }
 
     Status status;
@@ -48,102 +74,46 @@ class AotBuilder {
         timeout: timeoutConfiguration.slowOperation,
       );
     }
-    try {
-      final AOTSnapshotter snapshotter = AOTSnapshotter(reportTimings: reportTimings);
 
-      // Compile to kernel.
-      final String kernelOut = await snapshotter.compileKernel(
-        platform: platform,
-        buildMode: buildInfo.mode,
-        mainPath: mainDartFile,
-        packagesPath: PackageMap.globalPackagesPath,
-        trackWidgetCreation: buildInfo.trackWidgetCreation,
-        outputPath: outputPath,
-        extraFrontEndOptions: buildInfo.extraFrontEndOptions,
-        dartDefines: buildInfo.dartDefines
-      );
-      if (kernelOut == null) {
-        throwToolExit('Compiler terminated unexpectedly.');
-        return;
+    final Environment environment = Environment(
+      projectDir: globals.fs.currentDirectory,
+      outputDir: globals.fs.directory(outputPath),
+      buildDir: FlutterProject.current().dartTool.childDirectory('flutter_build'),
+      cacheDir: null,
+      flutterRootDir: globals.fs.directory(Cache.flutterRoot),
+      defines: <String, String>{
+        kTargetFile: mainDartFile ?? globals.fs.path.join('lib', 'main.dart'),
+        kBuildMode: getNameForBuildMode(buildInfo.mode),
+        kTargetPlatform: getNameForTargetPlatform(platform),
+        kIconTreeShakerFlag: buildInfo.treeShakeIcons.toString(),
+        kDartDefines: jsonEncode(buildInfo.dartDefines),
+        kBitcodeFlag: bitcode.toString(),
+        if (buildInfo?.extraGenSnapshotOptions?.isNotEmpty ?? false)
+          kExtraGenSnapshotOptions: buildInfo.extraGenSnapshotOptions.join(','),
+        if (buildInfo?.extraFrontEndOptions?.isNotEmpty ?? false)
+          kExtraFrontEndOptions: buildInfo.extraFrontEndOptions.join(','),
+        if (platform == TargetPlatform.ios)
+          kIosArchs: iosBuildArchs.map(getNameForDarwinArch).join(' ')
       }
+    );
+    final BuildResult result = await buildSystem.build(target, environment);
+    status?.stop();
 
-      // Build AOT snapshot.
-      if (platform == TargetPlatform.ios) {
-        // Determine which iOS architectures to build for.
-        final Map<DarwinArch, String> iosBuilds = <DarwinArch, String>{};
-        for (final DarwinArch arch in iosBuildArchs) {
-          iosBuilds[arch] = globals.fs.path.join(outputPath, getNameForDarwinArch(arch));
-        }
-
-        // Generate AOT snapshot and compile to arch-specific App.framework.
-        final Map<DarwinArch, Future<int>> exitCodes = <DarwinArch, Future<int>>{};
-        iosBuilds.forEach((DarwinArch iosArch, String outputPath) {
-          exitCodes[iosArch] = snapshotter.build(
-            platform: platform,
-            darwinArch: iosArch,
-            buildMode: buildInfo.mode,
-            mainPath: kernelOut,
-            packagesPath: PackageMap.globalPackagesPath,
-            outputPath: outputPath,
-            extraGenSnapshotOptions: buildInfo.extraGenSnapshotOptions,
-            bitcode: bitcode,
-            quiet: quiet,
-            splitDebugInfo: null,
-            dartObfuscation: false,
-          ).then<int>((int buildExitCode) {
-            return buildExitCode;
-          });
-        });
-
-        // Merge arch-specific App.frameworks into a multi-arch App.framework.
-        if ((await Future.wait<int>(exitCodes.values)).every((int buildExitCode) => buildExitCode == 0)) {
-          final Iterable<String> dylibs = iosBuilds.values.map<String>(
-              (String outputDir) => globals.fs.path.join(outputDir, 'App.framework', 'App'));
-          globals.fs.directory(globals.fs.path.join(outputPath, 'App.framework')).createSync();
-          await processUtils.run(
-            <String>[
-              'lipo',
-              ...dylibs,
-              '-create',
-              '-output', globals.fs.path.join(outputPath, 'App.framework', 'App'),
-            ],
-            throwOnError: true,
-          );
-        } else {
-          status?.cancel();
-          exitCodes.forEach((DarwinArch iosArch, Future<int> exitCodeFuture) async {
-            final int buildExitCode = await exitCodeFuture;
-            globals.printError('Snapshotting ($iosArch) exited with non-zero exit code: $buildExitCode');
-          });
-        }
-      } else {
-        // Android AOT snapshot.
-        final int snapshotExitCode = await snapshotter.build(
-          platform: platform,
-          buildMode: buildInfo.mode,
-          mainPath: kernelOut,
-          packagesPath: PackageMap.globalPackagesPath,
-          outputPath: outputPath,
-          extraGenSnapshotOptions: buildInfo.extraGenSnapshotOptions,
-          bitcode: false,
-          splitDebugInfo: null,
-          dartObfuscation: false,
-        );
-        if (snapshotExitCode != 0) {
-          status?.cancel();
-          throwToolExit('Snapshotting exited with non-zero exit code: $snapshotExitCode');
-        }
+    if (!result.success) {
+      for (final ExceptionMeasurement measurement in result.exceptions.values) {
+        globals.printError(measurement.exception.toString());
       }
-    } on ProcessException catch (error) {
-      // Catch the String exceptions thrown from the `runSync` methods below.
-      status?.cancel();
-      globals.printError(error.toString());
-      return;
+      throwToolExit('The aot build failed.');
     }
-    status?.stop();
 
-    if (outputPath == null) {
-      throwToolExit(null);
+    if (expectSo) {
+      environment.buildDir.childFile('app.so')
+        .copySync(globals.fs.path.join(outputPath, 'app.so'));
+    } else {
+      globals.fs.directory(globals.fs.path.join(outputPath, 'App.framework'))
+        .createSync(recursive: true);
+      environment.buildDir.childDirectory('App.framework').childFile('App')
+        .copySync(globals.fs.path.join(outputPath, 'App.framework', 'App'));
     }
 
     final String builtMessage = 'Built to $outputPath${globals.fs.path.separator}.';

packages/flutter_tools/lib/src/base/logger.dart

@@ -697,7 +697,7 @@ abstract class Status {
     @required Duration timeout,
     @required TimeoutConfiguration timeoutConfiguration,
     @required Stopwatch stopwatch,
-    @required AnsiTerminal terminal,
+    @required Terminal terminal,
     VoidCallback onFinish,
     SlowWarningCallback slowWarningCallback,
   }) {
@@ -877,7 +877,7 @@ class AnsiSpinner extends Status {
     @required Duration timeout,
     @required TimeoutConfiguration timeoutConfiguration,
     @required Stopwatch stopwatch,
-    @required AnsiTerminal terminal,
+    @required Terminal terminal,
     VoidCallback onFinish,
     this.slowWarningCallback,
     Stdio stdio,
@@ -893,7 +893,7 @@ class AnsiSpinner extends Status {
   final String _backspaceChar = '\b';
   final String _clearChar = ' ';
   final Stdio _stdio;
-  final AnsiTerminal _terminal;
+  final Terminal _terminal;
 
   bool timedOut = false;
 

packages/flutter_tools/lib/src/build_system/targets/android.dart

@@ -210,7 +210,14 @@ class AndroidAot extends AotElfBase {
 
   @override
   Future<void> build(Environment environment) async {
-    final AOTSnapshotter snapshotter = AOTSnapshotter(reportTimings: false);
+    final AOTSnapshotter snapshotter = AOTSnapshotter(
+      reportTimings: false,
+      fileSystem: globals.fs,
+      logger: globals.logger,
+      xcode: globals.xcode,
+      processManager: globals.processManager,
+      artifacts: globals.artifacts,
+    );
     final Directory output = environment.buildDir.childDirectory(_androidAbiName);
     final String splitDebugInfo = environment.defines[kSplitDebugInfo];
     if (environment.defines[kBuildMode] == null) {

packages/flutter_tools/lib/src/build_system/targets/dart.dart

@@ -204,9 +204,7 @@ class KernelSnapshot extends Target {
     final TargetPlatform targetPlatform = getTargetPlatformForName(environment.defines[kTargetPlatform]);
 
     // This configuration is all optional.
-    final List<String> extraFrontEndOptions = <String>[
-      ...?environment.defines[kExtraFrontEndOptions]?.split(',')
-    ];
+    final List<String> extraFrontEndOptions = environment.defines[kExtraFrontEndOptions]?.split(',');
     final List<String> fileSystemRoots = environment.defines[kFileSystemRoots]?.split(',');
     final String fileSystemScheme = environment.defines[kFileSystemScheme];
 
@@ -261,7 +259,14 @@ abstract class AotElfBase extends Target {
 
   @override
   Future<void> build(Environment environment) async {
-    final AOTSnapshotter snapshotter = AOTSnapshotter(reportTimings: false);
+    final AOTSnapshotter snapshotter = AOTSnapshotter(
+      reportTimings: false,
+      fileSystem: globals.fs,
+      logger: globals.logger,
+      xcode: globals.xcode,
+      processManager: globals.processManager,
+      artifacts: globals.artifacts,
+    );
     final String outputPath = environment.buildDir.path;
     if (environment.defines[kBuildMode] == null) {
       throw MissingDefineException(kBuildMode, 'aot_elf');

packages/flutter_tools/lib/src/build_system/targets/ios.dart

@@ -28,7 +28,14 @@ abstract class AotAssemblyBase extends Target {
 
   @override
   Future<void> build(Environment environment) async {
-    final AOTSnapshotter snapshotter = AOTSnapshotter(reportTimings: false);
+    final AOTSnapshotter snapshotter = AOTSnapshotter(
+      reportTimings: false,
+      fileSystem: globals.fs,
+      logger: globals.logger,
+      xcode: globals.xcode,
+      artifacts: globals.artifacts,
+      processManager: globals.processManager,
+    );
     final String buildOutputPath = environment.buildDir.path;
     if (environment.defines[kBuildMode] == null) {
       throw MissingDefineException(kBuildMode, 'aot_assembly');
@@ -36,6 +43,8 @@ abstract class AotAssemblyBase extends Target {
     if (environment.defines[kTargetPlatform] == null) {
       throw MissingDefineException(kTargetPlatform, 'aot_assembly');
     }
+    final List<String> extraGenSnapshotOptions = environment
+      .defines[kExtraGenSnapshotOptions]?.split(',') ?? const <String>[];
     final bool bitcode = environment.defines[kBitcodeFlag] == 'true';
     final BuildMode buildMode = getBuildModeForName(environment.defines[kBuildMode]);
     final TargetPlatform targetPlatform = getTargetPlatformForName(environment.defines[kTargetPlatform]);
@@ -65,6 +74,7 @@ abstract class AotAssemblyBase extends Target {
         quiet: true,
         splitDebugInfo: splitDebugInfo,
         dartObfuscation: dartObfuscation,
+        extraGenSnapshotOptions: extraGenSnapshotOptions,
       ));
     }
     final List<int> results = await Future.wait(pending);

packages/flutter_tools/lib/src/build_system/targets/macos.dart

@@ -202,7 +202,15 @@ class CompileMacOSFramework extends Target {
     }
     final String splitDebugInfo = environment.defines[kSplitDebugInfo];
     final bool dartObfuscation = environment.defines[kDartObfuscation] == 'true';
-    final int result = await AOTSnapshotter(reportTimings: false).build(
+    final AOTSnapshotter snapshotter = AOTSnapshotter(
+      reportTimings: false,
+      fileSystem: globals.fs,
+      logger: globals.logger,
+      xcode: globals.xcode,
+      artifacts: globals.artifacts,
+      processManager: globals.processManager
+    );
+    final int result = await snapshotter.build(
       bitcode: false,
       buildMode: buildMode,
       mainPath: environment.buildDir.childFile('app.dill').path,

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

@@ -27,11 +27,6 @@ class BuildAotCommand extends BuildSubCommand with TargetPlatformBasedDevelopmen
         allowed: <String>['android-arm', 'android-arm64', 'ios', 'android-x64'],
       )
       ..addFlag('quiet', defaultsTo: false)
-      ..addFlag('report-timings',
-        negatable: false,
-        defaultsTo: false,
-        help: 'Report timing information about build steps in machine readable form,',
-      )
       ..addMultiOption('ios-arch',
         splitCommas: true,
         defaultsTo: defaultIOSArchs.map<String>(getNameForDarwinArch),
@@ -80,7 +75,6 @@ class BuildAotCommand extends BuildSubCommand with TargetPlatformBasedDevelopmen
       mainDartFile: findMainDartFile(targetFile),
       bitcode: boolArg('bitcode'),
       quiet: boolArg('quiet'),
-      reportTimings: boolArg('report-timings'),
       iosBuildArchs: stringsArg('ios-arch').map<DarwinArch>(getIOSArchForName),
     );
     return FlutterCommandResult.success();

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

@@ -436,7 +436,6 @@ end
         mainDartFile: globals.fs.path.absolute(targetFile),
         quiet: true,
         bitcode: true,
-        reportTimings: false,
         iosBuildArchs: <DarwinArch>[DarwinArch.armv7, DarwinArch.arm64],
       );
     } finally {

packages/flutter_tools/lib/src/context_runner.dart

@@ -11,7 +11,6 @@ import 'android/gradle_utils.dart';
 import 'application_package.dart';
 import 'artifacts.dart';
 import 'asset.dart';
-import 'base/build.dart';
 import 'base/config.dart';
 import 'base/context.dart';
 import 'base/io.dart';
@@ -125,7 +124,6 @@ Future<T> runInContext<T>(
       FuchsiaDeviceTools: () => FuchsiaDeviceTools(),
       FuchsiaSdk: () => FuchsiaSdk(),
       FuchsiaWorkflow: () => FuchsiaWorkflow(),
-      GenSnapshot: () => const GenSnapshot(),
       GradleUtils: () => GradleUtils(),
       HotRunnerConfig: () => HotRunnerConfig(),
       IMobileDevice: () => IMobileDevice(),

packages/flutter_tools/lib/src/ios/xcodeproj.dart

@@ -249,7 +249,7 @@ class XcodeProjectInterpreter {
     @required ProcessManager processManager,
     @required Logger logger,
     @required FileSystem fileSystem,
-    @required AnsiTerminal terminal,
+    @required Terminal terminal,
   }) : _platform = platform,
        _fileSystem = fileSystem,
        _terminal = terminal,
@@ -259,7 +259,7 @@ class XcodeProjectInterpreter {
   final Platform _platform;
   final FileSystem _fileSystem;
   final ProcessUtils _processUtils;
-  final AnsiTerminal _terminal;
+  final Terminal _terminal;
   final Logger _logger;
 
   static const String _executable = '/usr/bin/xcodebuild';

packages/flutter_tools/test/general.shard/build_system/targets/macos_test.dart

@@ -5,7 +5,6 @@
 import 'package:flutter_tools/src/base/build.dart';
 import 'package:flutter_tools/src/base/file_system.dart';
 import 'package:flutter_tools/src/base/io.dart';
-import 'package:flutter_tools/src/base/process.dart';
 import 'package:flutter_tools/src/build_system/build_system.dart';
 import 'package:flutter_tools/src/build_system/targets/dart.dart';
 import 'package:flutter_tools/src/build_system/targets/macos.dart';
@@ -49,7 +48,6 @@ void main() {
   Testbed testbed;
   Environment environment;
   MockPlatform mockPlatform;
-  MockXcode mockXcode;
 
   setUpAll(() {
     Cache.disableLocking();
@@ -57,7 +55,6 @@ void main() {
   });
 
   setUp(() {
-    mockXcode = MockXcode();
     mockPlatform = MockPlatform();
     when(mockPlatform.isWindows).thenReturn(false);
     when(mockPlatform.isMacOS).thenReturn(true);
@@ -193,35 +190,6 @@ void main() {
 
     expect(outputFramework.readAsStringSync(), 'DEF');
   }));
-
-  test('release/profile macOS compilation uses correct gen_snapshot', () => testbed.run(() async {
-    when(genSnapshot.run(
-      snapshotType: anyNamed('snapshotType'),
-      additionalArgs: anyNamed('additionalArgs'),
-      darwinArch: anyNamed('darwinArch'),
-    )).thenAnswer((Invocation invocation) {
-      environment.buildDir.childFile('snapshot_assembly.o').createSync();
-      environment.buildDir.childFile('snapshot_assembly.S').createSync();
-      return Future<int>.value(0);
-    });
-    when(mockXcode.cc(any)).thenAnswer((Invocation invocation) {
-      return Future<RunResult>.value(RunResult(FakeProcessResult()..exitCode = 0, <String>['test']));
-    });
-    when(mockXcode.clang(any)).thenAnswer((Invocation invocation) {
-      return Future<RunResult>.value(RunResult(FakeProcessResult()..exitCode = 0, <String>['test']));
-    });
-    environment.buildDir.childFile('app.dill').createSync(recursive: true);
-    globals.fs.file('.packages')
-      ..createSync()
-      ..writeAsStringSync('''
-# Generated
-sky_engine:file:///bin/cache/pkg/sky_engine/lib/
-flutter_tools:lib/''');
-    await const CompileMacOSFramework().build(environment..defines[kBuildMode] = 'release');
-  }, overrides: <Type, Generator>{
-    GenSnapshot: () => MockGenSnapshot(),
-    Xcode: () => mockXcode,
-  }));
 }
 
 class MockPlatform extends Mock implements Platform {}