allow some config options to be optional

packages/core/data-transfer/src/commands/export/action.ts

@@ -61,9 +61,9 @@ export default async (opts: CmdOptions) => {
   const engine = createTransferEngine(source, destination, {
     versionStrategy: 'ignore', // for an export to file, versionStrategy will always be skipped
     schemaStrategy: 'ignore', // for an export to file, schemaStrategy will always be skipped
-    exclude: opts.exclude ?? [],
-    only: opts.only ?? [],
-    throttle: opts.throttle ?? 0,
+    exclude: opts.exclude,
+    only: opts.only,
+    throttle: opts.throttle,
     transforms: {
       links: [
         {

packages/core/data-transfer/src/commands/import/action.ts

@@ -72,9 +72,9 @@ export default async (opts: CmdOptions) => {
   const engineOptions: EngineOptions = {
     versionStrategy: DEFAULT_VERSION_STRATEGY,
     schemaStrategy: DEFAULT_SCHEMA_STRATEGY,
-    exclude: opts.exclude ?? [],
-    only: opts.only ?? [],
-    throttle: opts.throttle ?? 0,
+    exclude: opts.exclude,
+    only: opts.only,
+    throttle: opts.throttle,
     transforms: {
       links: [
         {

packages/core/data-transfer/src/commands/transfer/action.ts

@@ -111,9 +111,9 @@ export default async (opts: CmdOptions) => {
   const engine = createTransferEngine(source, destination, {
     versionStrategy: 'exact',
     schemaStrategy: 'strict',
-    exclude: opts.exclude ?? [],
-    only: opts.only ?? [],
-    throttle: opts.throttle ?? 0,
+    exclude: opts.exclude,
+    only: opts.only,
+    throttle: opts.throttle,
     transforms: {
       links: [
         {

packages/core/data-transfer/src/engine/index.ts

@@ -483,13 +483,13 @@ class TransferEngine<
 
     // everything is included by default unless 'only' has been set
     let included = isEmpty(only);
-    if (only?.length > 0) {
+    if (only && only.length > 0) {
       included = only.some((transferGroup) => {
         return TransferGroupPresets[transferGroup][stage];
       });
     }
 
-    if (exclude?.length > 0) {
+    if (exclude && exclude.length > 0) {
       if (included) {
         included = !exclude.some((transferGroup) => {
           return TransferGroupPresets[transferGroup][stage];

packages/core/data-transfer/types/transfer-engine.d.ts

@@ -170,9 +170,9 @@ export interface ITransferEngineOptions {
   transforms?: TransferTransforms;
 
   // List of TransferTransformList preset options to exclude/include
-  exclude: TransferFilterPreset[];
-  only: TransferFilterPreset[];
+  exclude?: TransferFilterPreset[];
+  only?: TransferFilterPreset[];
 
   // delay after each record
-  throttle: number;
+  throttle?: number;
 }