Stop generating index information for SDK and simplify summary generation.

pkg/analyzer/tool/summary/build_sdk_summaries.dart

 import 'dart:io';
 
 import 'package:analyzer/file_system/physical_file_system.dart';
 import 'package:analyzer/src/dart/sdk/sdk.dart';
-import 'package:analyzer/src/summary/flat_buffers.dart' as fb;
 import 'package:analyzer/src/summary/summary_file_builder.dart';
 
 main(List<String> args) {
-  if (args.length < 1) {
-    _printUsage();
-    exitCode = 1;
-    return;
-  }
-  String command = args[0];
-  if ((command == 'multiple-outputs' || command == 'strong-outputs') &&
-      args.length >= 2 &&
-      args.length <= 3) {
-    bool includeSpec = command != 'strong-outputs';
-    //
-    // Prepare the output path.
-    //
-    String outputDirectoryPath = args[1];
-    if (!FileSystemEntity.isDirectorySync(outputDirectoryPath)) {
-      print("'$outputDirectoryPath' is not a directory.");
-      _printUsage();
-      exitCode = 1;
-      return;
-    }
-    //
-    // Prepare results.
-    //
-    String sdkPath = args.length > 2 ? args[2] : null;
-    SummaryOutput output = _buildMultipleOutputs(sdkPath, includeSpec);
-    if (output == null) {
-      exitCode = 1;
-      return;
-    }
-    //
-    // Write results.
-    //
-    if (includeSpec) {
-      output.spec.writeMultiple(outputDirectoryPath, 'spec');
-    }
-    output.strong.writeMultiple(outputDirectoryPath, 'strong');
-  } else if (command == 'single-output' &&
-      args.length >= 2 &&
-      args.length <= 3) {
-    String outputPath = args[1];
-    String sdkPath = args.length > 2 ? args[2] : null;
-    //
-    // Prepare results.
-    //
-    SummaryOutput output = _buildMultipleOutputs(sdkPath, true);
-    if (output == null) {
-      exitCode = 1;
-      return;
-    }
-
-    //
-    // Write results.
-    //
-    output.write(outputPath);
-  } else if (command == 'extract-spec-sum' && args.length == 3) {
-    String inputPath = args[1];
-    String outputPath = args[2];
-    _extractSingleOutput(inputPath, FIELD_SPEC_SUM, outputPath);
-  } else if (command == 'extract-spec-index' && args.length == 3) {
-    String inputPath = args[1];
-    String outputPath = args[2];
-    _extractSingleOutput(inputPath, FIELD_SPEC_INDEX, outputPath);
-  } else if (command == 'extract-strong-sum' && args.length == 3) {
-    String inputPath = args[1];
-    String outputPath = args[2];
-    _extractSingleOutput(inputPath, FIELD_STRONG_SUM, outputPath);
-  } else if (command == 'extract-strong-index' && args.length == 3) {
-    String inputPath = args[1];
-    String outputPath = args[2];
-    _extractSingleOutput(inputPath, FIELD_STRONG_INDEX, outputPath);
+  String command;
+  String outFilePath;
+  String sdkPath;
+  if (args.length == 2) {
+    command = args[0];
+    outFilePath = args[1];
+  } else if (args.length == 3) {
+    command = args[0];
+    outFilePath = args[1];
+    sdkPath = args[2];
   } else {
     _printUsage();
     exitCode = 1;
     return;
   }
+
+  //
+  // Validate the SDK path.
+  //
+  sdkPath ??= FolderBasedDartSdk
+      .defaultSdkDirectory(PhysicalResourceProvider.INSTANCE)
+      .path;
+  if (!FileSystemEntity.isDirectorySync('$sdkPath/lib')) {
+    print("'$sdkPath/lib' does not exist.");
+    _printUsage();
+    return;
+  }
+
+  //
+  // Handle commands.
+  //
+  if (command == 'build-spec') {
+    _buildSummary(sdkPath, outFilePath, false);
+  } else if (command == 'build-strong') {
+    _buildSummary(sdkPath, outFilePath, true);
+  } else {
+    _printUsage();
+    return;
+  }
 }
 
 /**
  * The name of the SDK summaries builder application.
  */
 const BINARY_NAME = "build_sdk_summaries";
 
-SummaryOutput _buildMultipleOutputs(String sdkPath, bool includeSpec) {
-  //
-  // Validate the SDK path.
-  //
-  if (sdkPath != null) {
-    if (!FileSystemEntity.isDirectorySync('$sdkPath/lib')) {
-      print("'$sdkPath/lib' does not exist.");
-      _printUsage();
-      return null;
-    }
-  } else {
-    sdkPath = FolderBasedDartSdk
-        .defaultSdkDirectory(PhysicalResourceProvider.INSTANCE)
-        .path;
-  }
-
-  //
-  // Build spec and strong outputs.
-  //
-  BuilderOutput spec = includeSpec ? _buildOutput(sdkPath, false) : null;
-  BuilderOutput strong = _buildOutput(sdkPath, true);
-  return new SummaryOutput(spec, strong);
-}
-
-BuilderOutput _buildOutput(String sdkPath, bool strongMode) {
-  String modeName = strongMode ? 'strong' : 'spec';
-  print('Generating $modeName mode summary and index.');
+void _buildSummary(String sdkPath, String outPath, bool strong) {
+  String modeName = strong ? 'strong' : 'spec';
+  print('Generating $modeName mode summary.');
   Stopwatch sw = new Stopwatch()..start();
-  SummaryBuildConfig config = new SummaryBuildConfig(strongMode: strongMode);
-  BuilderOutput output = new SummaryBuilder.forSdk(sdkPath, config).build();
+  List<int> bytes = new SummaryBuilder.forSdk(sdkPath, strong).build();
+  new File(outPath).writeAsBytesSync(bytes, mode: FileMode.WRITE_ONLY);
   print('\tDone in ${sw.elapsedMilliseconds} ms.');
-  return output;
-}
-
-/**
- * Open the flat buffer in [inputPath] and extract the byte array in the [field]
- * into the [outputPath] file.
- */
-void _extractSingleOutput(String inputPath, int field, String outputPath) {
-  List<int> bytes = new File(inputPath).readAsBytesSync();
-  fb.BufferContext root = new fb.BufferContext.fromBytes(bytes);
-  int tableOffset = root.derefObject(0);
-  List<int> fieldBytes =
-      const fb.Uint8ListReader().vTableGet(root, tableOffset, field);
-  new File(outputPath).writeAsBytesSync(fieldBytes, mode: FileMode.WRITE_ONLY);
 }
 
 /**
  * Print information about how to use the SDK summaries builder.
  */
 void _printUsage() {
-//  print('Usage: $BINARY_NAME command output_directory_path [sdk_path]');
   print('Usage: $BINARY_NAME command arguments');
   print('Where command can be one of the following:');
-  print('  multiple-outputs output_directory_path [sdk_path]');
-  print('    Generate separate summary and index files.');
-  print('  strong-outputs output_directory_path [sdk_path]');
-  print('    Generate separate summary and index files (strong mode only).');
-  print('  single-output output_file_path [sdk_path]');
-  print('    Generate a single file with summary and index.');
-  print('  extract-spec-sum input_file output_file');
-  print('    Extract the spec-mode summary file.');
-  print('  extract-strong-sum input_file output_file');
-  print('    Extract the strong-mode summary file.');
-  print('  extract-spec-index input_file output_file');
-  print('    Extract the spec-mode index file.');
-  print('  extract-strong-index input_file output_file');
-  print('    Extract the strong-mode index file.');
+  print('  build-spec output_file [sdk_path]');
+  print('    Generate spec mode summary file.');
+  print('  build-strong output_file [sdk_path]');
+  print('    Generate strong mode summary file.');
 }