ModelGen(Swift, Java): Handle nullability of lists transparently based on the GraphQL schema specification (#142)

* fix(modelgen): Handle nullability of lists properly

Author: phani-srikar

.eslintrc.js

@@ -230,11 +230,7 @@ module.exports = {
     'function-template-dir',
 
     // Ignore output directories of typescript project until move to tsc and fixing src locations
-    '/packages/appsync-modelgen-plugin/lib',
-    '/packages/graphql-docs-generator/lib',
-    '/packages/graphql-types-generator/lib',
-    '/packages/amplify-codegen-e2e-core/lib',
-    '/packages/amplify-codegen-e2e-tests/lib',
+    '/packages/*/lib',
 
     // Ignore CHANGELOG.md files
     '/packages/*/CHANGELOG.md'

packages/amplify-codegen/src/commands/models.js

@@ -89,6 +89,8 @@ async function generateModels(context) {
       );
     }
   }
+  const handleListNullabilityTransparently = readFeatureFlag('codegen.handleListNullabilityTransparently');
+
   const appsyncLocalConfig = await appSyncDataStoreCodeGen.preset.buildGeneratesSection({
     baseOutputDir: outputPath,
     schema,
@@ -99,6 +101,7 @@ async function generateModels(context) {
       emitAuthProvider,
       generateIndexRules,
       enableDartNullSafety,
+      handleListNullabilityTransparently
     },
   });