feat(transformers): implement initializing deferred libraries

Implement deferred libraries to work with dependency injection and other
angular codegen. This is done by not initializing the library in the parent
ng_deps file when it is declared as deferred, rewriting the import and,
chaining a future that initializes the library in any files that are using
deferred libraries which need angular codegen.

modules/angular2/test/transform/deferred_rewriter/all_tests.dart

@@ -0,0 +1,58 @@
+library angular2.test.transform.deferred_rewriter.all_tests;
+
+import 'package:barback/barback.dart';
+import 'package:angular2/src/transform/deferred_rewriter/transformer.dart';
+import 'package:angular2/src/transform/common/annotation_matcher.dart';
+import 'package:angular2/src/transform/common/asset_reader.dart';
+import 'package:angular2/src/transform/common/logging.dart' as log;
+import 'package:code_transformers/messages/build_logger.dart';
+import 'package:dart_style/dart_style.dart';
+import 'package:guinness/guinness.dart';
+import 'package:path/path.dart' as path;
+import '../common/read_file.dart';
+
+var formatter = new DartFormatter();
+
+main() {
+  allTests();
+}
+
+void allTests() {
+  _testRewriteDeferredLibraries(
+      'should return null when no deferred libraries found.',
+      'no_deferred_libraries/index.dart');
+  _testRewriteDeferredLibraries(
+      'should return null when deferred libraries with no ng_deps.',
+      'no_ng_deps_libraries/index.dart');
+  _testRewriteDeferredLibraries(
+      'should rewrite deferred libraries with ng_deps.',
+      'simple_deferred_example/index.dart');
+  _testRewriteDeferredLibraries(
+      'should not rewrite deferred libraries without ng_deps.',
+      'deferred_example_no_ng_deps/index.dart');
+  _testRewriteDeferredLibraries(
+      'should rewrite deferred libraries with ng_deps leave other deferred library alone.',
+      'complex_deferred_example/index.dart');
+}
+
+void _testRewriteDeferredLibraries(String name, String inputPath) {
+  it(name, () async {
+    var inputId = _assetIdForPath(inputPath);
+    var reader = new TestAssetReader();
+    var expectedPath = path.join(
+        path.dirname(inputPath), 'expected', path.basename(inputPath));
+    var expectedId = _assetIdForPath(expectedPath);
+
+    var output = await rewriteDeferredLibraries(reader, inputId);
+    var input = await reader.readAsString(expectedId);
+    if (input == null) {
+      // Null input signals no output. Ensure that is true.
+      expect(output).toBeNull();
+    } else {
+      expect(formatter.format(output)).toEqual(formatter.format(input));
+    }
+  });
+}
+
+AssetId _assetIdForPath(String path) =>
+    new AssetId('angular2', 'test/transform/deferred_rewriter/$path');

modules/angular2/test/transform/deferred_rewriter/complex_deferred_example/expected/index.dart

@@ -0,0 +1,17 @@
+library web_foo;
+
+import 'package:angular2/src/core/application.dart';
+import 'package:angular2/src/reflection/reflection.dart';
+import 'package:angular2/src/reflection/reflection_capabilities.dart';
+import 'hello.ng_deps.dart' deferred as a; // ng_deps. Should be rewritten.
+import 'b.dart' deferred as b; // No ng_deps. Shouldn't be rewritten.
+
+void main() {
+  reflector.reflectionCapabilities = new ReflectionCapabilities();
+  a.loadLibrary().then((_) {
+    a.initReflector();
+  }).then((_) {
+    bootstrap(a.HelloCmp);
+  });
+  b.loadLibrary();
+}

modules/angular2/test/transform/deferred_rewriter/complex_deferred_example/hello.dart

@@ -0,0 +1,8 @@
+library examples.src.hello_world.absolute_url_expression_files;
+
+import 'package:angular2/angular2.dart'
+    show bootstrap, Component, Directive, View, NgElement;
+
+@Component(selector: 'hello-app')
+@View(templateUrl: 'package:other_package/template.html')
+class HelloCmp {}

modules/angular2/test/transform/deferred_rewriter/complex_deferred_example/hello.ng_deps.dart

@@ -0,0 +1,24 @@
+library examples.src.hello_world.absolute_url_expression_files.ng_deps.dart;
+
+import 'hello.dart';
+export 'hello.dart';
+import 'package:angular2/src/reflection/reflection.dart' as _ngRef;
+import 'package:angular2/angular2.dart'
+    show bootstrap, Component, Directive, View, NgElement;
+
+var _visited = false;
+void initReflector() {
+  if (_visited) return;
+  _visited = true;
+  _ngRef.reflector
+    ..registerType(HelloCmp, {
+      'factory': () => new HelloCmp(),
+      'parameters': const [],
+      'annotations': const [
+        const Component(selector: 'hello-app'),
+        const View(
+            template: r'''{{greeting}}''',
+            templateUrl: r'package:other_package/template.html')
+      ]
+    });
+}

modules/angular2/test/transform/deferred_rewriter/complex_deferred_example/index.dart

@@ -0,0 +1,15 @@
+library web_foo;
+
+import 'package:angular2/src/core/application.dart';
+import 'package:angular2/src/reflection/reflection.dart';
+import 'package:angular2/src/reflection/reflection_capabilities.dart';
+import 'hello.dart' deferred as a; // ng_deps. Should be rewritten.
+import 'b.dart' deferred as b; // No ng_deps. Shouldn't be rewritten.
+
+void main() {
+  reflector.reflectionCapabilities = new ReflectionCapabilities();
+  a.loadLibrary().then((_) {
+    bootstrap(a.HelloCmp);
+  });
+  b.loadLibrary();
+}

modules/angular2/test/transform/deferred_rewriter/deferred_example_no_ng_deps/hello.dart

@@ -0,0 +1,8 @@
+library examples.src.hello_world.absolute_url_expression_files;
+
+import 'package:angular2/angular2.dart'
+    show bootstrap, Component, Directive, View, NgElement;
+
+@Component(selector: 'hello-app')
+@View(templateUrl: 'package:other_package/template.html')
+class HelloCmp {}

modules/angular2/test/transform/deferred_rewriter/deferred_example_no_ng_deps/index.dart

@@ -0,0 +1,13 @@
+library web_foo;
+
+import 'package:angular2/src/core/application.dart';
+import 'package:angular2/src/reflection/reflection.dart';
+import 'package:angular2/src/reflection/reflection_capabilities.dart';
+import 'hello.dart' deferred as a;
+
+void main() {
+  reflector.reflectionCapabilities = new ReflectionCapabilities();
+  a.loadLibrary().then((_) {
+    bootstrap(a.HelloCmp);
+  });
+}

modules/angular2/test/transform/deferred_rewriter/no_deferred_libraries/index.dart

@@ -0,0 +1,10 @@
+library web_foo;
+
+import 'package:angular2/src/core/application.dart';
+import 'package:angular2/src/reflection/reflection.dart';
+import 'package:angular2/src/reflection/reflection_capabilities.dart';
+
+void main() {
+  reflector.reflectionCapabilities = new ReflectionCapabilities();
+  bootstrap(MyComponent);
+}

modules/angular2/test/transform/deferred_rewriter/no_ng_deps_libraries/index.dart

@@ -0,0 +1,11 @@
+library web_foo;
+
+import 'package:angular2/src/core/application.dart';
+import 'package:angular2/src/reflection/reflection.dart';
+import 'package:angular2/src/reflection/reflection_capabilities.dart';
+import 'a.dart' deferred as a;
+
+void main() {
+  reflector.reflectionCapabilities = new ReflectionCapabilities();
+  bootstrap(MyComponent);
+}

modules/angular2/test/transform/deferred_rewriter/simple_deferred_example/expected/index.dart

@@ -0,0 +1,15 @@
+library web_foo;
+
+import 'package:angular2/src/core/application.dart';
+import 'package:angular2/src/reflection/reflection.dart';
+import 'package:angular2/src/reflection/reflection_capabilities.dart';
+import 'hello.ng_deps.dart' deferred as a;
+
+void main() {
+  reflector.reflectionCapabilities = new ReflectionCapabilities();
+  a.loadLibrary().then((_) {
+    a.initReflector();
+  }).then((_) {
+    bootstrap(a.HelloCmp);
+  });
+}

modules/angular2/test/transform/deferred_rewriter/simple_deferred_example/hello.dart

@@ -0,0 +1,8 @@
+library examples.src.hello_world.absolute_url_expression_files;
+
+import 'package:angular2/angular2.dart'
+    show bootstrap, Component, Directive, View, NgElement;
+
+@Component(selector: 'hello-app')
+@View(templateUrl: 'package:other_package/template.html')
+class HelloCmp {}

modules/angular2/test/transform/deferred_rewriter/simple_deferred_example/hello.ng_deps.dart

@@ -0,0 +1,24 @@
+library examples.src.hello_world.absolute_url_expression_files.ng_deps.dart;
+
+import 'hello.dart';
+export 'hello.dart';
+import 'package:angular2/src/reflection/reflection.dart' as _ngRef;
+import 'package:angular2/angular2.dart'
+    show bootstrap, Component, Directive, View, NgElement;
+
+var _visited = false;
+void initReflector() {
+  if (_visited) return;
+  _visited = true;
+  _ngRef.reflector
+    ..registerType(HelloCmp, {
+      'factory': () => new HelloCmp(),
+      'parameters': const [],
+      'annotations': const [
+        const Component(selector: 'hello-app'),
+        const View(
+            template: r'''{{greeting}}''',
+            templateUrl: r'package:other_package/template.html')
+      ]
+    });
+}

modules/angular2/test/transform/deferred_rewriter/simple_deferred_example/index.dart

@@ -0,0 +1,13 @@
+library web_foo;
+
+import 'package:angular2/src/core/application.dart';
+import 'package:angular2/src/reflection/reflection.dart';
+import 'package:angular2/src/reflection/reflection_capabilities.dart';
+import 'hello.dart' deferred as a;
+
+void main() {
+  reflector.reflectionCapabilities = new ReflectionCapabilities();
+  a.loadLibrary().then((_) {
+    bootstrap(a.HelloCmp);
+  });
+}

modules/angular2/test/transform/directive_linker/simple_export_files/bar.ng_deps.dart

@@ -1,6 +1,7 @@
 library bar.ng_deps.dart;
 
 import 'bar.dart';
+export 'bar.dart';
 import 'package:angular2/src/reflection/reflection.dart' as _ngRef;
 import 'package:angular2/src/core/annotations_impl/annotations.dart';
 export 'foo.dart';

modules/angular2/test/transform/directive_linker/simple_export_files/expected/bar.ng_deps.dart

@@ -1,6 +1,7 @@
 library bar.ng_deps.dart;
 
 import 'bar.dart';
+export 'bar.dart';
 import 'package:angular2/src/reflection/reflection.dart' as _ngRef;
 import 'package:angular2/src/core/annotations_impl/annotations.dart';
 export 'foo.dart';

modules/angular2/test/transform/directive_linker/simple_export_files/expected/foo.ng_deps.dart

@@ -1,6 +1,7 @@
 library foo.ng_deps.dart;
 
 import 'foo.dart';
+export 'foo.dart';
 import 'package:angular2/src/reflection/reflection.dart' as _ngRef;
 import 'package:angular2/src/core/annotations_impl/annotations.dart';
 

modules/angular2/test/transform/directive_linker/simple_export_files/foo.ng_deps.dart

@@ -1,6 +1,7 @@
 library foo.ng_deps.dart;
 
 import 'foo.dart';
+export 'foo.dart';
 import 'package:angular2/src/reflection/reflection.dart' as _ngRef;
 import 'package:angular2/src/core/annotations_impl/annotations.dart';
 

modules/angular2/test/transform/directive_linker/simple_files/bar.ng_deps.dart

@@ -1,6 +1,7 @@
 library bar.ng_deps.dart;
 
 import 'bar.dart';
+export 'bar.dart';
 import 'package:angular2/src/reflection/reflection.dart' as _ngRef;
 import 'package:angular2/src/core/annotations_impl/annotations.dart';
 import 'foo.dart' as dep;

modules/angular2/test/transform/directive_linker/simple_files/expected/bar.ng_deps.dart

@@ -1,6 +1,7 @@
 library bar.ng_deps.dart;
 
 import 'bar.dart';
+export 'bar.dart';
 import 'package:angular2/src/reflection/reflection.dart' as _ngRef;
 import 'package:angular2/src/core/annotations_impl/annotations.dart';
 import 'foo.dart' as dep;

modules/angular2/test/transform/directive_linker/simple_files/expected/foo.ng_deps.dart

@@ -1,6 +1,7 @@
 library foo.ng_deps.dart;
 
 import 'foo.dart';
+export 'foo.dart';
 import 'package:angular2/src/reflection/reflection.dart' as _ngRef;
 import 'package:angular2/src/core/annotations_impl/annotations.dart';
 

modules/angular2/test/transform/directive_linker/simple_files/foo.ng_deps.dart

@@ -1,6 +1,7 @@
 library foo.ng_deps.dart;
 
 import 'foo.dart';
+export 'foo.dart';
 import 'package:angular2/src/reflection/reflection.dart' as _ngRef;
 import 'package:angular2/src/core/annotations_impl/annotations.dart';
 

modules/angular2/test/transform/directive_processor/absolute_url_expression_files/expected/hello.ng_deps.dart

@@ -1,6 +1,7 @@
 library examples.src.hello_world.absolute_url_expression_files.ng_deps.dart;
 
 import 'hello.dart';
+export 'hello.dart';
 import 'package:angular2/src/reflection/reflection.dart' as _ngRef;
 import 'package:angular2/angular2.dart'
     show bootstrap, Component, Directive, View, NgElement;

modules/angular2/test/transform/directive_processor/custom_metadata/expected/package_soup.ng_deps.dart

@@ -1,6 +1,7 @@
 library dinner.package_soup.ng_deps.dart;
 
 import 'package_soup.dart';
+export 'package_soup.dart';
 import 'package:angular2/src/reflection/reflection.dart' as _ngRef;
 import 'package:soup/soup.dart';
 

modules/angular2/test/transform/directive_processor/custom_metadata/expected/relative_soup.ng_deps.dart

@@ -1,6 +1,7 @@
 library dinner.relative_soup.ng_deps.dart;
 
 import 'relative_soup.dart';
+export 'relative_soup.dart';
 import 'package:angular2/src/reflection/reflection.dart' as _ngRef;
 import 'annotations/soup.dart';
 

modules/angular2/test/transform/directive_processor/expected/hello.ng_deps.dart

@@ -1,6 +1,7 @@
 library examples.src.hello_world.index_common_dart.ng_deps.dart;
 
 import 'hello.dart';
+export 'hello.dart';
 import 'package:angular2/src/reflection/reflection.dart' as _ngRef;
 import 'package:angular2/angular2.dart'
     show bootstrap, Component, Directive, View, NgElement;

modules/angular2/test/transform/directive_processor/interface_chain_files/expected/soup.ng_deps.dart

@@ -1,6 +1,7 @@
 library dinner.soup.ng_deps.dart;
 
 import 'soup.dart';
+export 'soup.dart';
 import 'package:angular2/src/reflection/reflection.dart' as _ngRef;
 import 'package:angular2/src/core/annotations_impl/annotations.dart';
 

modules/angular2/test/transform/directive_processor/interfaces_files/expected/soup.ng_deps.dart

@@ -1,6 +1,7 @@
 library dinner.soup.ng_deps.dart;
 
 import 'soup.dart';
+export 'soup.dart';
 import 'package:angular2/src/reflection/reflection.dart' as _ngRef;
 import 'package:angular2/src/core/annotations_impl/annotations.dart';
 

modules/angular2/test/transform/directive_processor/invalid_url_files/expected/hello.ng_deps.dart

@@ -1,6 +1,7 @@
 library test.transform.directive_processor.invalid_url_files.hello.ng_deps.dart;
 
 import 'hello.dart';
+export 'hello.dart';
 import 'package:angular2/src/reflection/reflection.dart' as _ngRef;
 import 'package:angular2/angular2.dart'
     show bootstrap, Component, Directive, View, NgElement;

modules/angular2/test/transform/directive_processor/multiple_style_urls_files/expected/hello.ng_deps.dart

@@ -1,6 +1,7 @@
 library examples.src.hello_world.multiple_style_urls_files.ng_deps.dart;
 
 import 'hello.dart';
+export 'hello.dart';
 import 'package:angular2/src/reflection/reflection.dart' as _ngRef;
 import 'package:angular2/angular2.dart'
     show bootstrap, Component, Directive, View, NgElement;

modules/angular2/test/transform/directive_processor/multiple_style_urls_not_inlined_files/expected/hello.ng_deps.dart

@@ -1,6 +1,7 @@
 library examples.src.hello_world.multiple_style_urls_not_inlined_files.ng_deps.dart;
 
 import 'hello.dart';
+export 'hello.dart';
 import 'package:angular2/src/reflection/reflection.dart' as _ngRef;
 import 'package:angular2/angular2.dart'
     show bootstrap, Component, Directive, View, NgElement;

modules/angular2/test/transform/directive_processor/parameter_metadata/expected/soup.ng_deps.dart

@@ -1,6 +1,7 @@
 library dinner.soup.ng_deps.dart;
 
 import 'soup.dart';
+export 'soup.dart';
 import 'package:angular2/src/reflection/reflection.dart' as _ngRef;
 import 'package:angular2/src/core/annotations_impl/annotations.dart';
 

modules/angular2/test/transform/directive_processor/split_url_expression_files/expected/hello.ng_deps.dart

@@ -1,6 +1,7 @@
 library examples.src.hello_world.split_url_expression_files.ng_deps.dart;
 
 import 'hello.dart';
+export 'hello.dart';
 import 'package:angular2/src/reflection/reflection.dart' as _ngRef;
 import 'package:angular2/angular2.dart'
     show bootstrap, Component, Directive, View, NgElement;

modules/angular2/test/transform/directive_processor/static_function_files/expected/hello.ng_deps.dart

@@ -1,6 +1,7 @@
 library static_function_files.hello.ng_deps.dart;
 
 import 'hello.dart';
+export 'hello.dart';
 import 'package:angular2/src/reflection/reflection.dart' as _ngRef;
 import 'package:angular2/angular2.dart';
 

modules/angular2/test/transform/directive_processor/superclass_files/expected/soup.ng_deps.dart

@@ -1,6 +1,7 @@
 library dinner.soup.ng_deps.dart;
 
 import 'soup.dart';
+export 'soup.dart';
 import 'package:angular2/src/reflection/reflection.dart' as _ngRef;
 import 'package:angular2/src/core/annotations_impl/annotations.dart';
 

modules/angular2/test/transform/directive_processor/url_expression_files/expected/hello.ng_deps.dart

@@ -1,6 +1,7 @@
 library examples.src.hello_world.url_expression_files.ng_deps.dart;
 
 import 'hello.dart';
+export 'hello.dart';
 import 'package:angular2/src/reflection/reflection.dart' as _ngRef;
 import 'package:angular2/angular2.dart'
     show bootstrap, Component, Directive, View, NgElement;

modules/angular2/test/transform/integration/list_of_types_files/expected/bar.ng_deps.dart

@@ -1,6 +1,7 @@
 library bar.ng_deps.dart;
 
 import 'bar.dart';
+export 'bar.dart';
 import 'package:angular2/src/reflection/reflection.dart' as _ngRef;
 import 'package:angular2/src/core/annotations_impl/annotations.dart';
 import 'foo.dart';

modules/angular2/test/transform/integration/simple_annotation_files/expected/bar.ng_deps.dart

@@ -1,6 +1,7 @@
 library bar.ng_deps.dart;
 
 import 'bar.dart';
+export 'bar.dart';
 import 'package:angular2/src/reflection/reflection.dart' as _ngRef;
 import 'package:angular2/src/core/annotations_impl/annotations.dart';
 

modules/angular2/test/transform/integration/simple_annotation_files/expected/index.ng_deps.dart

@@ -1,6 +1,7 @@
 library web_foo.ng_deps.dart;
 
 import 'index.dart';
+export 'index.dart';
 import 'package:angular2/src/reflection/reflection.dart' as _ngRef;
 import 'package:angular2/src/core/application.dart';
 import 'package:angular2/src/reflection/reflection.dart';

modules/angular2/test/transform/integration/synthetic_ctor_files/expected/bar.ng_deps.dart

@@ -1,6 +1,7 @@
 library bar.ng_deps.dart;
 
 import 'bar.dart';
+export 'bar.dart';
 import 'package:angular2/src/reflection/reflection.dart' as _ngRef;
 import 'package:angular2/src/core/annotations_impl/annotations.dart';
 

modules/angular2/test/transform/integration/two_annotations_files/expected/bar.ng_deps.dart

@@ -4,6 +4,7 @@ import 'package:angular2/src/change_detection/pregen_proto_change_detector.dart'
     as _gen;
 
 import 'bar.dart';
+export 'bar.dart';
 import 'package:angular2/src/reflection/reflection.dart' as _ngRef;
 import 'package:angular2/src/core/annotations_impl/annotations.dart';
 import 'package:angular2/src/core/annotations_impl/view.dart';

modules/angular2/test/transform/integration/two_deps_files/expected/bar.ng_deps.dart

@@ -1,6 +1,7 @@
 library bar.ng_deps.dart;
 
 import 'bar.dart';
+export 'bar.dart';
 import 'package:angular2/src/reflection/reflection.dart' as _ngRef;
 import 'package:angular2/src/core/annotations_impl/annotations.dart';
 import 'foo.dart' as prefix;

modules/angular2/test/transform/transform.server.spec.dart

@@ -6,6 +6,7 @@ import 'package:unittest/vm_config.dart';
 
 import 'common/async_string_writer_tests.dart' as asyncStringWriter;
 import 'bind_generator/all_tests.dart' as bindGenerator;
+import 'deferred_rewriter/all_tests.dart' as deferredRewriter;
 import 'directive_linker/all_tests.dart' as directiveLinker;
 import 'directive_metadata_extractor/all_tests.dart' as directiveMeta;
 import 'directive_processor/all_tests.dart' as directiveProcessor;
@@ -22,6 +23,7 @@ main() {
   describe('Directive Processor', directiveProcessor.allTests);
   describe('Reflection Remover', reflectionRemover.allTests);
   describe('Template Compiler', templateCompiler.allTests);
+  describe('Deferred Rewriter', deferredRewriter.allTests);
   // NOTE(kegluneq): These use `code_transformers#testPhases`, which is not
   // designed to work with `guinness`.
   group('Transformer Pipeline', integration.allTests);