update DDC and analyzer cli preprocessArgs

pkg/dev_compiler/bin/dartdevc.dart

 #!/usr/bin/env dart
 // Copyright (c) 2016, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 /// Command line entry point for Dart Development Compiler (dartdevc).
 ///
 /// Supported commands are
 ///   * compile: builds a collection of dart libraries into a single JS module
 ///
@@ skipping 19 matching lines @@
 ///   file server,
 /// * We didn't have a file watcher API at first,
 /// * We had no conventions about where compiled output should go (or even
 ///   that we would be compiling at all, vs running on an in-browser Dart VM),
 /// * We wanted a good first impression with our simple examples, so we used
 ///   local file servers, and users have an expectation of it now, even though
 ///   it doesn't scale to typical apps that need their own real servers.
 
 import 'dart:async';
 import 'dart:io';
+import 'package:analyzer/file_system/physical_file_system.dart';
+import 'package:analyzer/src/command_line/arguments.dart';
 import 'package:analyzer/src/generated/engine.dart' show AnalysisEngine;
 import 'package:bazel_worker/bazel_worker.dart';
 import 'package:dev_compiler/src/compiler/command.dart';
 
 Future main(List<String> args) async {
   // Always returns a new modifiable list.
-  args = _preprocessArgs(args);
+  args = preprocessArgs(PhysicalResourceProvider.INSTANCE, args);
 
   if (args.contains('--persistent_worker')) {
     new _CompilerWorker(args..remove('--persistent_worker')).run();
   } else {
     exitCode = compile(args);
   }
 }
 
 /// Runs the compiler worker loop.
 class _CompilerWorker extends AsyncWorkerLoop {
   /// The original args supplied to the executable.
   final List<String> _startupArgs;
 
   _CompilerWorker(this._startupArgs) : super();
 
   /// Performs each individual work request.
   Future<WorkResponse> performRequest(WorkRequest request) async {
     var args = _startupArgs.toList()..addAll(request.arguments);
 
     var output = new StringBuffer();
     var exitCode = compile(args, printFn: output.writeln);
     AnalysisEngine.instance.clearCaches();
     return new WorkResponse()
       ..exitCode = exitCode
       ..output = output.toString();
   }
 }
-
-/// Always returns a new modifiable list.
-///
-/// If the final arg is `@file_path` then read in all the lines of that file
-/// and add those as args.
-///
-/// Bazel actions that support workers must provide all their per-WorkRequest
-/// arguments in a file like this instead of as normal args.
-List<String> _preprocessArgs(List<String> args) {
-  args = new List.from(args);
-  if (args.isNotEmpty && args.last.startsWith('@')) {
-    var fileArg = args.removeLast();
-    args.addAll(new File(fileArg.substring(1)).readAsLinesSync());
-  }
-  return args;
-}