Add diagrams for Canvas.drawArc and Path.addArc

bin/generate.dart

@@ -313,8 +313,9 @@ class DiagramGenerator {
         .where((File input) => path.basename(input.path) == 'error.log')
         .toList();
 
-    if (errorFiles.length != 1)
+    if (errorFiles.length != 1) {
       throw GeneratorException('Subprocess did not complete cleanly!');
+    }
 
     print('Processing ${inputFiles.length - 1} files...');
 

bin/pubspec.yaml

@@ -8,9 +8,11 @@ dependencies:
   process_runner: ">=4.0.0 <5.0.0"
 
 dev_dependencies:
+  args: ^2.3.1
   analyzer: ^4.1.0
   test: ^1.16.8
+  path: ^1.8.0
+  process: ^4.2.1
 
 environment:
   sdk: ">=2.17.0-0 <3.0.0"
-

bin/test/fake_process_manager.dart

@@ -243,7 +243,7 @@ class StringStreamConsumer implements StreamConsumer<List<int>> {
       }),
     );
     subscriptions.last.onDone(() => completers.last.complete(null));
-    return Future<dynamic>.value(null);
+    return Future<dynamic>.value();
   }
 
   @override
@@ -254,6 +254,6 @@ class StringStreamConsumer implements StreamConsumer<List<int>> {
     completers.clear();
     streams.clear();
     subscriptions.clear();
-    return Future<dynamic>.value(null);
+    return Future<dynamic>.value();
   }
 }

packages/diagram_generator/lib/main.dart

@@ -94,6 +94,7 @@ Future<void> main(List<String> args) async {
     AlignDiagramStep(controller),
     AnimationStatusValueDiagramStep(controller),
     AppBarDiagramStep(controller),
+    ArcDiagramStep(controller),
     BlendModeDiagramStep(controller),
     BottomNavigationBarDiagramStep(controller),
     BoxDecorationDiagramStep(controller),

packages/diagrams/lib/diagrams.dart

@@ -10,6 +10,7 @@ export 'src/align.dart';
 export 'src/animation_diagram.dart';
 export 'src/animation_status_value.dart';
 export 'src/app_bar.dart';
+export 'src/arc_diagram.dart';
 export 'src/blend_mode.dart';
 export 'src/bottom_navigation_bar.dart';
 export 'src/box_decoration.dart';