tool: share formatter

Author: kevmoo

json_serializable/tool/shared.dart

@@ -5,8 +5,11 @@
 import 'dart:io';
 
 import 'package:build/build.dart';
+import 'package:dart_style/dart_style.dart';
 import 'package:yaml/yaml.dart';
 
+final formatter = DartFormatter();
+
 // Until we have verification in pkg:build and friends
 // https://github.com/dart-lang/build/issues/590
 Builder validate(String builderName, Builder builder) {

json_serializable/tool/test_builder.dart

@@ -6,13 +6,10 @@ import 'dart:async';
 import 'dart:collection';
 
 import 'package:build/build.dart';
-import 'package:dart_style/dart_style.dart';
 import 'package:path/path.dart' as p;
 
 import 'shared.dart';
 
-final _formatter = DartFormatter();
-
 Builder testBuilder([_]) => validate('_test_builder', const _TestBuilder());
 
 class _TestBuilder implements Builder {
@@ -56,7 +53,7 @@ class _TestBuilder implements Builder {
 
       final content = Replacement.generate(sourceContent, replacements);
 
-      await buildStep.writeAsString(newId, _formatter.format(content));
+      await buildStep.writeAsString(newId, formatter.format(content));
     }
 
     if (baseName == _kitchenSinkBaseName) {
@@ -73,7 +70,7 @@ class _TestBuilder implements Builder {
         '];',
       ];
 
-      await buildStep.writeAsString(newId, _formatter.format(lines.join('\n')));
+      await buildStep.writeAsString(newId, formatter.format(lines.join('\n')));
     }
   }
 

json_serializable/tool/test_type_builder.dart

@@ -6,14 +6,11 @@ import 'dart:async';
 
 import 'package:build/build.dart';
 import 'package:collection/collection.dart';
-import 'package:dart_style/dart_style.dart';
 import 'package:json_serializable/src/type_helpers/map_helper.dart';
 
 import 'shared.dart';
 import 'test_type_data.dart';
 
-final _formatter = DartFormatter();
-
 const _trivialTypesToTest = {
   'BigInt': TestTypeData.defaultFunc(
     jsonExpression: "'12345'",
@@ -128,7 +125,7 @@ class _TypeBuilder implements Builder {
 
       await buildStep.writeAsString(
         newId,
-        _formatter.format(entry.value.libContent(sourceContent, type)),
+        formatter.format(entry.value.libContent(sourceContent, type)),
       );
     }
   }