fixes #219, able to compile multiple entry points

lib/src/codegen/code_generator.dart

Index: lib/src/codegen/code_generator.dart
diff --git a/lib/src/codegen/code_generator.dart b/lib/src/codegen/code_generator.dart
index 033833ead97fb8efbf655335fc7702a4a3af2455..888a2d4095ce7b97635bf4acdbedc26f7d7087be 100644
--- a/lib/src/codegen/code_generator.dart
+++ b/lib/src/codegen/code_generator.dart
@@ -4,15 +4,12 @@
 
 library dev_compiler.src.codegen.code_generator;
 
-import 'dart:io';
-
-import 'package:analyzer/src/generated/ast.dart' show CompilationUnit;
 import 'package:analyzer/src/generated/element.dart'
     show CompilationUnitElement, LibraryElement;
 import 'package:analyzer/src/generated/engine.dart' show AnalysisContext;
 import 'package:path/path.dart' as path;
 
-import 'package:dev_compiler/devc.dart' show AbstractCompiler;
+import 'package:dev_compiler/src/compiler.dart' show AbstractCompiler;
 import 'package:dev_compiler/src/info.dart';
 import 'package:dev_compiler/src/utils.dart' show canonicalLibraryName;
 import 'package:dev_compiler/src/checker/rules.dart';
@@ -20,16 +17,12 @@ import 'package:dev_compiler/src/options.dart' show CodegenOptions;
 
 abstract class CodeGenerator {
   final AbstractCompiler compiler;
-  final String outDir;
-  final Uri root;
   final TypeRules rules;
   final AnalysisContext context;
   final CodegenOptions options;
 
   CodeGenerator(AbstractCompiler compiler)
       : compiler = compiler,
-        outDir = path.absolute(compiler.options.codegenOptions.outputDir),
-        root = compiler.entryPointUri,
         rules = compiler.rules,
         context = compiler.context,
         options = compiler.options.codegenOptions;
@@ -37,7 +30,7 @@ abstract class CodeGenerator {
   /// Return a hash, if any, that can be used for caching purposes. When two
   /// invocations to this function return the same hash, the underlying
   /// code-generator generated the same code.
-  String generateLibrary(LibraryUnit unit, LibraryInfo info);
+  String generateLibrary(LibraryUnit unit);
 
   static List<String> _searchPaths = () {
     // TODO(vsm): Can we remove redundancy with multi_package_resolver logic?
@@ -114,16 +107,6 @@ abstract class CodeGenerator {
     return _convertIfPackage(suffix);
   }
 
-  String makeOutputDirectory(LibraryInfo info, CompilationUnit unit) {
-    var suffix = _getOutputDirectory(info.name, unit.element);
-    var fileDir = path.join(outDir, suffix);
-    var dir = new Directory(fileDir);
-    if (!dir.existsSync()) {
-      dir.createSync(recursive: true);
-    }
-    return fileDir;
-  }
-
   static Uri uriFor(LibraryElement lib) {
     var unitElement = lib.definingCompilationUnit;
     var uri = unitElement.source.uri;