Handle parts as input in resolver.

pkg/compiler/bin/resolver.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.
 
 import 'dart:io';
 
 import 'package:args/args.dart';
-import 'package:compiler/src/apiimpl.dart';
 import 'package:compiler/src/filenames.dart';
-import 'package:compiler/src/null_compiler_output.dart';
-import 'package:compiler/src/options.dart';
-import 'package:compiler/src/serialization/json_serializer.dart';
-import 'package:compiler/src/source_file_provider.dart';
-import 'package:package_config/discovery.dart';
+
+import 'package:compiler/src/dart2js_resolver.dart';
 
 main(var argv) async {
   var parser = new ArgParser();
   parser.addOption('deps', abbr: 'd', allowMultiple: true);
   parser.addOption('out', abbr: 'o');
   parser.addOption('library-root', abbr: 'l');
   parser.addOption('packages', abbr: 'p');
   parser.addOption('bazel-paths', abbr: 'I', allowMultiple: true);
   var args = parser.parse(argv);
 
-  var resolutionInputs = args['deps']
-      .map((uri) => currentDirectory.resolve(nativeToUriPath(uri)))
-      .toList();
-  var root = args['library-root'];
-  var libraryRoot = root == null
-      ? Platform.script.resolve('../../../sdk/')
-      : currentDirectory.resolve(nativeToUriPath(root));
-
-  var options = new CompilerOptions(
-      libraryRoot: libraryRoot,
-      packageConfig: args['packages'] == null
-          ? null
-          : currentDirectory.resolve(args['packages']),
-      resolveOnly: true,
-      resolutionInputs: resolutionInputs,
-      packagesDiscoveryProvider: findPackages);
-
-  var bazelSearchPaths = args['bazel-paths'];
-  var inputProvider = bazelSearchPaths != null
-      ? new BazelInputProvider(bazelSearchPaths)
-      : new CompilerSourceFileProvider();
-
-  var outputProvider = const NullCompilerOutput();
-  var diagnostics = new FormattingDiagnosticHandler(inputProvider)
-    ..enableColors = true;
-  var compiler =
-      new CompilerImpl(inputProvider, outputProvider, diagnostics, options);
-
   if (args.rest.isEmpty) {
     print('missing input files');
     exit(1);
   }
 
   var inputs = args.rest
       .map((uri) => currentDirectory.resolve(nativeToUriPath(uri)))
       .toList();
 
-  await compiler.setupSdk();
-  await compiler.setupPackages(inputs.first);
-
-  for (var library in inputs) {
-    await compiler.libraryLoader.loadLibrary(library);
-  }
-
-  for (var library in inputs) {
-    compiler.fullyEnqueueLibrary(compiler.libraryLoader.lookupLibrary(library),
-        compiler.enqueuer.resolution);
-  }
-
-  compiler.processQueue(compiler.enqueuer.resolution, null);
-
-  var librariesToSerialize =
-      inputs.map((lib) => compiler.libraryLoader.lookupLibrary(lib)).toList();
-
-  var serializer =
-      compiler.serialization.createSerializer(librariesToSerialize);
-  var text = serializer.toText(const JsonSerializationEncoder());
+  var text = await resolve(
+      inputs,
+      deps: args['deps'],
+      root: args['library-root'],
+      packages: args['packages'],
+      bazelSearchPaths: args['bazel-paths']);
 
   var outFile = args['out'] ?? 'out.data';
 
   await new File(outFile).writeAsString(text);
 }