fix: Unable to generate files in different directories smotastic#54

smotastic#54 (comment)

example/build.yaml

@@ -0,0 +1,18 @@
+# Use the different 'build_extensions' on the folder 'otherlib'. So that the code generated by 
+# smartstruct will be writed to the customized folder ('otherlib/gen').
+
+targets:
+  $default:
+    sources:
+      exclude:
+        - otherlib/**
+
+  $my-target:
+    sources:
+      - otherlib/**
+
+    builders:
+      smartstruct_generator|mapper:
+
+        options:
+          build_extensions: {"^otherlib/{{}}.dart": "otherlib/gen/{{}}.mapper.g.dart"}

example/otherlib/example/example.dart

@@ -0,0 +1,19 @@
+import 'package:smartstruct/smartstruct.dart';
+part '../gen/example/example.mapper.g.dart';
+
+class Source {
+  final String userName;
+
+  Source(this.userName);
+}
+
+class Target {
+  final String username;
+
+  Target({required this.username});
+}
+
+@Mapper()
+abstract class ExampleMapper {
+  Target fromSource(Source source);
+}

generator/lib/integrations/builder.dart

@@ -4,4 +4,4 @@ import '../generators/mapper_generator.dart';
 
 /// Main Builder for the [Mapping] Annotation
 Builder smartstructBuilder(BuilderOptions options) =>
-    PartBuilder([MapperGenerator()], '.mapper.g.dart');
+    PartBuilder([MapperGenerator()], '.mapper.g.dart', options: options);