remove sdk summaries (#7957)

packages/flutter_tools/lib/src/cache.dart

@@ -4,8 +4,6 @@
 
 import 'dart:async';
 
-import 'package:flutter_tools/src/dart/pub.dart';
-import 'package:flutter_tools/src/dart/summary.dart';
 import 'package:path/path.dart' as path;
 
 import 'base/context.dart';
@@ -247,8 +245,6 @@ class FlutterEngine {
 
   static const String kName = 'engine';
   static const String kSkyEngine = 'sky_engine';
-  static const String kSdkBundleSpec = 'spec.sum';
-  static const String kSdkBundleStrong = 'strong.sum';
 
   final Cache cache;
 
@@ -316,19 +312,10 @@ class FlutterEngine {
     Directory pkgDir = cache.getCacheDir('pkg');
     for (String pkgName in _getPackageDirs()) {
       String pkgPath = path.join(pkgDir.path, pkgName);
-      String dotPackagesPath = path.join(pkgPath, '.packages');
       if (!fs.directory(pkgPath).existsSync())
         return false;
-      if (!fs.file(dotPackagesPath).existsSync())
-        return false;
     }
 
-    if (!fs.file(path.join(pkgDir.path, kSkyEngine, kSdkBundleSpec)).existsSync())
-      return false;
-
-    if (!fs.file(path.join(pkgDir.path, kSkyEngine, kSdkBundleStrong)).existsSync())
-      return false;
-
     Directory engineDir = cache.getArtifactDirectory(kName);
     for (List<String> toolsDir in _getBinaryDirs()) {
       Directory dir = fs.directory(path.join(engineDir.path, toolsDir[0]));
@@ -350,23 +337,6 @@ class FlutterEngine {
       if (dir.existsSync())
         dir.deleteSync(recursive: true);
       await _downloadItem('Downloading package $pkgName...', url + pkgName + '.zip', pkgDir);
-      await pubGet(directory: pkgPath);
-    }
-
-    Status summarySpecStatus = logger.startProgress('Building Dart SDK spec summary...');
-    try {
-      String skyEnginePath = path.join(pkgDir.path, kSkyEngine);
-      buildSkyEngineSdkSummary(skyEnginePath, kSdkBundleSpec, false);
-    } finally {
-      summarySpecStatus.stop();
-    }
-
-    Status summaryStrongStatus = logger.startProgress('Building Dart SDK strong summary...');
-    try {
-      String skyEnginePath = path.join(pkgDir.path, kSkyEngine);
-      buildSkyEngineSdkSummary(skyEnginePath, kSdkBundleStrong, true);
-    } finally {
-      summaryStrongStatus.stop();
     }
 
     Directory engineDir = cache.getArtifactDirectory(kName);

packages/flutter_tools/lib/src/dart/summary.dart

-import 'package:analyzer/file_system/file_system.dart';
-import 'package:analyzer/file_system/physical_file_system.dart';
-import 'package:analyzer/src/context/builder.dart'; // ignore: implementation_imports
-import 'package:analyzer/src/dart/sdk/sdk.dart'; // ignore: implementation_imports
-import 'package:analyzer/src/generated/engine.dart'; // ignore: implementation_imports
-import 'package:analyzer/src/generated/source.dart'; // ignore: implementation_imports
-import 'package:analyzer/src/summary/summary_file_builder.dart'; // ignore: implementation_imports
-import 'package:flutter_tools/src/globals.dart';
-import 'package:path/path.dart' as pathos;
-import 'package:yaml/src/yaml_node.dart'; // ignore: implementation_imports
-
-import '../base/file_system.dart' as file;
-
-/// Given the [skyEnginePath], locate corresponding `_embedder.yaml` and compose
-/// the full embedded Dart SDK, and build the [outBundleName] file with its
-/// linked [strong] or spec summary.
-void buildSkyEngineSdkSummary(String skyEnginePath, String outBundleName, bool strong) {
-  ResourceProvider resourceProvider = PhysicalResourceProvider.INSTANCE;
-
-  Map<String, List<Folder>> packageMap = <String, List<Folder>>{
-    'sky_engine': <Folder>[
-      resourceProvider.getFolder(pathos.join(skyEnginePath, 'lib'))
-    ]
-  };
-
-  // Read the `_embedder.yaml` file.
-  EmbedderYamlLocator yamlLocator = new EmbedderYamlLocator(packageMap);
-  Map<Folder, YamlMap> embedderYamls = yamlLocator.embedderYamls;
-  if (embedderYamls.length != 1) {
-    printError('Exactly one _embedder.yaml was expected in $packageMap, '
-        'but $embedderYamls found.');
-    return;
-  }
-
-  // Create the EmbedderSdk instance.
-  EmbedderSdk sdk = new EmbedderSdk(resourceProvider, embedderYamls);
-  sdk.analysisOptions = new AnalysisOptionsImpl()..strongMode = true;
-
-  // Gather sources.
-  List<Source> sources = sdk.uris.map(sdk.mapDartUri).toList();
-
-  // Build.
-  List<int> bytes = new SummaryBuilder(sources, sdk.context, strong).build();
-  String outputPath = pathos.join(skyEnginePath, outBundleName);
-  file.fs.file(outputPath).writeAsBytesSync(bytes);
-}