Add build_runner builder

README.md

@@ -78,6 +78,20 @@ index_generator:
 -h, --help 
 ```
 
+## Build runner 
+
+`index_generator` can be run via [build_runner](https://pub.dev/packages/build_runner). To do so, add the following dependancies:
+
+```yaml
+dev_dependencies:
+  build_runner: ^2.3.3
+  index_generator: ^3.5.0 
+```
+
+To generate use `<dart|flutter> pub global run build_runner <build|watch>`
+
+
+
 ## Features and bugs
 
 Please file feature requests and bugs at the [issue tracker](https://github.com/BreX900/index_generator/issues).

build.yaml

@@ -1,7 +1,9 @@
 targets:
   $default:
+    auto_apply_builders: false
     builders:
       json_serializable:
+        enabled: false
         options:
           # Options configure how source code is generated for every
           # `@JsonSerializable`-annotated class in the package.
@@ -16,4 +18,15 @@ targets:
           field_rename: snake
           generic_argument_factories: false
           ignore_unannotated: false
-          include_if_null: true
+          include_if_null: true
+      index_generator:
+        enabled: true
+
+builders:
+  index_generator:
+    import: "package:index_generator/src/builder.dart"
+    builder_factories: ["indexGeneratorBuilder"]
+    build_extensions: { '$package$': ['.dart'] }
+    auto_apply: root_package
+    build_to: source
+    required_inputs: ['.gen.dart']

example/pubspec.yaml

@@ -2,8 +2,13 @@ name: example
 publish_to: 'none'
 
 environment:
-  sdk: '>=2.10.0 <3.0.0'
+  sdk: '>=2.12.0 <3.0.0'
 
 dependencies:
   args:
-  path:
+  path:
+
+dev_dependencies:
+  build_runner: ^2.3.3
+  index_generator:
+    path: ../

lib/index_generator.dart

@@ -2,6 +2,7 @@
 /// with all the export needed for your library.
 library index_generator;
 
+export 'src/builder.dart';
 export 'src/converters.dart';
 export 'src/dart_code/dart_export.dart';
 export 'src/index_generator.dart';

lib/src/builder.dart

@@ -0,0 +1,86 @@
+// ignore_for_file: depend_on_referenced_packages
+import 'dart:io';
+
+import 'package:build/build.dart';
+import 'package:glob/glob.dart';
+import 'package:path/path.dart' as p;
+import 'package:index_generator/src/settings/library_settings.dart';
+import 'package:index_generator/src/settings/package_settings.dart';
+import 'package:index_generator/src/index_generator.dart';
+import 'package:yaml/yaml.dart';
+import 'package:checked_yaml/checked_yaml.dart';
+import 'package:dart_style/dart_style.dart';
+
+Builder indexGeneratorBuilder(BuilderOptions options) {
+  final toolBox = ToolBoxSync(name: 'index_generator');
+  final project = ToolBoxSync.loadYaml(toolBox.projectYaml, ProjectSettings.fromJson);
+  final settingsFile = toolBox.findYaml(null);
+  final settings = ToolBoxSync.loadYaml(settingsFile, PackageSettings.fromYaml);
+  return IndexGeneratorBuilder(project, settings);
+}
+
+class IndexGeneratorBuilder implements Builder {
+  IndexGeneratorBuilder(ProjectSettings project, this.package) {
+    generators = package.libraries.map((library) {
+      return IndexGenerator.from(project, package, library);
+    }).toList();
+  }
+  late final List<IndexGenerator> generators;
+  final PackageSettings package;
+
+  static AssetId _createFileOutput(BuildStep buildStep, String filePath) {
+    return AssetId(
+      buildStep.inputId.package,
+      filePath,
+    );
+  }
+
+  @override
+  Map<String, List<String>> get buildExtensions {
+    return {
+      r'$package$': generators.map((g) => g.indexFile.path).toList(),
+    };
+  }
+
+  @override
+  Future<void> build(BuildStep buildStep) async {
+    final formatter = DartFormatter(
+      lineEnding: package.lineBreak,
+      pageWidth: package.pageWidth,
+    );
+    for (var generator in generators) {
+      final content = formatter.format(generator.generate().join(package.lineBreak));
+      final output = _createFileOutput(buildStep, generator.indexFile.path);
+      buildStep.writeAsString(output, content);
+    }
+  }
+}
+
+class ToolBoxSync {
+  ToolBoxSync({required String name}) : packageYaml = File('$name.yaml');
+  final File projectYaml = File('pubspec.yaml');
+  final File packageYaml;
+
+  File findYaml(String? path) {
+    if (path != null) return File(path);
+
+    if (packageYaml.existsSync()) return packageYaml;
+
+    return projectYaml;
+  }
+
+  static T loadYaml<T>(File file, T Function(Map map) from) {
+    if (!file.existsSync()) {
+      throw Exception('Not find ${file.path} file in this project');
+    }
+    try {
+      return checkedYamlDecode(
+        file.readAsStringSync(),
+        (map) => from(map!),
+        sourceUrl: Uri.file(file.path),
+      );
+    } on ParsedYamlException catch (error) {
+      throw Exception(error.formattedMessage!);
+    }
+  }
+}

pubspec.yaml

@@ -1,6 +1,6 @@
 name: index_generator
 description: Automatically generate index / barrel / library files with all the export needed for your library.
-version: 3.4.1
+version: 3.5.0
 homepage: https://github.com/BreX900/index_generator
 topics:
   - library
@@ -24,20 +24,20 @@ dependencies:
   yaml: ^3.1.1
   checked_yaml: ^2.0.1
   mek_data_class: ^1.0.1
-  json_annotation: ^4.8.0
+  json_annotation: ^4.8.1
   glob: ^2.1.0
 
   pubspec: ^2.2.0
   dart_style: ^2.2.3
 
 dev_dependencies:
-  lints: ^2.0.0
+  lints: ^3.0.0
 
   test: ^1.21.6
 
   build_runner: ^2.3.3
   mek_data_class_generator: ^1.1.1
-  json_serializable: ^6.6.1
+  json_serializable: ^6.7.1
 
 executables:
   index_generator: