apply writeAdditionalExports() of TypeScriptIntegration interface to the ssdk generation

Author: AllanZhengYP

smithy-typescript-codegen/src/main/java/software/amazon/smithy/typescript/codegen/IndexGenerator.java

@@ -60,6 +60,12 @@ static void writeIndex(
 
         // write export statement for models
         writer.write("export * from \"./models\";");
+
+        // Write each custom export.
+        for (TypeScriptIntegration integration : integrations) {
+            integration.writeAdditionalExports(settings, model, symbolProvider, writer);
+        }
+
         fileManifest.writeFile(Paths.get(CodegenUtils.SOURCE_FOLDER, "index.ts").toString(), writer.toString());
     }
 
@@ -83,8 +89,6 @@ static void writeServerIndex(
 
         writer.write("export * from \"./$L\"", symbol.getName());
 
-        writer.write("export { SmithyException } from $S", TypeScriptDependency.SERVER_COMMON.packageName);
-
         fileManifest.writeFile(
             Paths.get(CodegenUtils.SOURCE_FOLDER, ServerSymbolVisitor.SERVER_FOLDER, "index.ts").toString(),
             writer.toString());
@@ -124,11 +128,5 @@ private static void writeClientExports(
         if (operations.stream().anyMatch(operation -> operation.hasTrait(WaitableTrait.ID))) {
             writer.write("export * from \"./waiters\";");
         }
-
-        // Write each custom export.
-        for (TypeScriptIntegration integration : integrations) {
-            integration.writeAdditionalExports(settings, model, symbolProvider, writer);
-        }
-        fileManifest.writeFile(Paths.get(CodegenUtils.SOURCE_FOLDER, "index.ts").toString(), writer.toString());
     }
 }

smithy-typescript-codegen/src/main/java/software/amazon/smithy/typescript/codegen/integration/AddBaseExceptionClassExport.java

@@ -35,6 +35,11 @@ public void writeAdditionalExports(
             SymbolProvider symbolProvider,
             TypeScriptWriter writer
     ) {
-        writer.write("export { ServiceException } from $S;", TypeScriptDependency.AWS_SMITHY_CLIENT.packageName);
+        boolean isServerSdk = settings.generateServerSdk();
+        if (isServerSdk) {
+            writer.write("export {SmithyException} from $S;", TypeScriptDependency.SERVER_COMMON.packageName);
+        } else {
+            writer.write("export { ServiceException } from $S;", TypeScriptDependency.AWS_SMITHY_CLIENT.packageName);
+        }
     }
 }