Avoid unnecessary async on RequestOpts when no auth is configured

The typescript-fetch generator unconditionally marks all
RequestOpts functions as async, even when the endpoint has no
auth methods and the function body is entirely synchronous.

Only emit async/Promise when the operation has auth methods that
require await calls (bearer tokens, API keys, OAuth).

Author: guizmaii

modules/openapi-generator/src/main/resources/typescript-fetch/apis.mustache

@@ -53,7 +53,7 @@ export interface {{classname}}Interface {
      * @throws {RequiredError}
      * @memberof {{classname}}Interface
      */
-    {{nickname}}RequestOpts({{#allParams.0}}requestParameters: {{#prefixParameterInterfaces}}{{classname}}{{/prefixParameterInterfaces}}{{operationIdCamelCase}}Request{{/allParams.0}}): Promise<runtime.RequestOpts>;
+    {{nickname}}RequestOpts({{#allParams.0}}requestParameters: {{#prefixParameterInterfaces}}{{classname}}{{/prefixParameterInterfaces}}{{operationIdCamelCase}}Request{{/allParams.0}}): {{#hasAuthMethods}}Promise<{{/hasAuthMethods}}runtime.RequestOpts{{#hasAuthMethods}}>{{/hasAuthMethods}};
 
     /**
      * {{&notes}}
@@ -113,7 +113,7 @@ export class {{classname}} extends runtime.BaseAPI {
      * @deprecated
      {{/isDeprecated}}
      */
-    async {{nickname}}RequestOpts({{#allParams.0}}requestParameters: {{#prefixParameterInterfaces}}{{classname}}{{/prefixParameterInterfaces}}{{operationIdCamelCase}}Request{{/allParams.0}}): Promise<runtime.RequestOpts> {
+    {{#hasAuthMethods}}async {{/hasAuthMethods}}{{nickname}}RequestOpts({{#allParams.0}}requestParameters: {{#prefixParameterInterfaces}}{{classname}}{{/prefixParameterInterfaces}}{{operationIdCamelCase}}Request{{/allParams.0}}): {{#hasAuthMethods}}Promise<{{/hasAuthMethods}}runtime.RequestOpts{{#hasAuthMethods}}>{{/hasAuthMethods}} {
         {{#allParams}}
         {{#required}}
         if (requestParameters['{{paramName}}'] == null) {

modules/openapi-generator/src/test/java/org/openapitools/codegen/typescript/fetch/TypeScriptFetchClientCodegenTest.java

@@ -458,6 +458,28 @@ public void testValidationAttributesWithWithoutRuntimeChecks() throws IOExceptio
         TestUtils.assertFileContains(modelsIndex, "[property: string]:");
     }
 
+    /**
+     * Endpoints without auth methods should generate synchronous RequestOpts functions,
+     * while endpoints with auth methods should generate async RequestOpts functions.
+     */
+    @Test(description = "Verify RequestOpts is only async when auth methods are present")
+    public void testRequestOptsIsAsyncOnlyWithAuthMethods() throws IOException {
+        File output = generate(
+            Collections.emptyMap(),
+            "src/test/resources/3_0/typescript-fetch/api-with-and-without-auth.yaml"
+        );
+
+        Path apiFile = Paths.get(output + "/apis/DefaultApi.ts");
+        TestUtils.assertFileExists(apiFile);
+
+        // Endpoint without auth: synchronous signature
+        TestUtils.assertFileContains(apiFile, "listPublicItemsRequestOpts(): runtime.RequestOpts {");
+        TestUtils.assertFileNotContains(apiFile, "listPublicItemsRequestOpts(): Promise<runtime.RequestOpts>");
+
+        // Endpoint with auth: async signature
+        TestUtils.assertFileContains(apiFile, "async listPrivateItemsRequestOpts(): Promise<runtime.RequestOpts> {");
+    }
+
     private static File generate(
         Map<String, Object> properties
     ) throws IOException {

modules/openapi-generator/src/test/resources/3_0/typescript-fetch/api-with-and-without-auth.yaml

@@ -0,0 +1,50 @@
+openapi: 3.0.3
+info:
+  title: API with mixed auth
+  version: 1.0.0
+paths:
+  /public/items:
+    get:
+      operationId: listPublicItems
+      summary: List public items (no auth)
+      responses:
+        '200':
+          description: OK
+          content:
+            application/json:
+              schema:
+                type: array
+                items:
+                  $ref: '#/components/schemas/Item'
+  /private/items:
+    get:
+      operationId: listPrivateItems
+      summary: List private items (requires API key)
+      security:
+        - ApiKeyAuth: []
+      responses:
+        '200':
+          description: OK
+          content:
+            application/json:
+              schema:
+                type: array
+                items:
+                  $ref: '#/components/schemas/Item'
+components:
+  securitySchemes:
+    ApiKeyAuth:
+      type: apiKey
+      in: header
+      name: X-API-KEY
+  schemas:
+    Item:
+      type: object
+      required:
+        - id
+        - name
+      properties:
+        id:
+          type: string
+        name:
+          type: string

samples/client/petstore/typescript-fetch/builds/allOf-nullable/apis/DefaultApi.ts

@@ -34,7 +34,7 @@ export class DefaultApi extends runtime.BaseAPI {
     /**
      * Creates request options for list without sending the request
      */
-    async listRequestOpts(requestParameters: ListRequest): Promise<runtime.RequestOpts> {
+    listRequestOpts(requestParameters: ListRequest): runtime.RequestOpts {
         if (requestParameters['personId'] == null) {
             throw new runtime.RequiredError(
                 'personId',

samples/client/petstore/typescript-fetch/builds/allOf-readonly/apis/DefaultApi.ts

@@ -34,7 +34,7 @@ export class DefaultApi extends runtime.BaseAPI {
     /**
      * Creates request options for list without sending the request
      */
-    async listRequestOpts(requestParameters: ListRequest): Promise<runtime.RequestOpts> {
+    listRequestOpts(requestParameters: ListRequest): runtime.RequestOpts {
         if (requestParameters['personId'] == null) {
             throw new runtime.RequiredError(
                 'personId',

samples/client/petstore/typescript-fetch/builds/default-v3.0/apis/AnotherFakeApi.ts

@@ -34,7 +34,7 @@ export class AnotherFakeApi extends runtime.BaseAPI {
     /**
      * Creates request options for _123testSpecialTags without sending the request
      */
-    async _123testSpecialTagsRequestOpts(requestParameters: 123testSpecialTagsRequest): Promise<runtime.RequestOpts> {
+    _123testSpecialTagsRequestOpts(requestParameters: 123testSpecialTagsRequest): runtime.RequestOpts {
         if (requestParameters['client'] == null) {
             throw new runtime.RequiredError(
                 'client',

samples/client/petstore/typescript-fetch/builds/default-v3.0/apis/DefaultApi.ts

@@ -30,7 +30,7 @@ export class DefaultApi extends runtime.BaseAPI {
     /**
      * Creates request options for fooGet without sending the request
      */
-    async fooGetRequestOpts(): Promise<runtime.RequestOpts> {
+    fooGetRequestOpts(): runtime.RequestOpts {
         const queryParameters: any = {};
 
         const headerParameters: runtime.HTTPHeaders = {};

samples/client/petstore/typescript-fetch/builds/default-v3.0/apis/FakeApi.ts

@@ -176,7 +176,7 @@ export class FakeApi extends runtime.BaseAPI {
     /**
      * Creates request options for fakeBigDecimalMap without sending the request
      */
-    async fakeBigDecimalMapRequestOpts(): Promise<runtime.RequestOpts> {
+    fakeBigDecimalMapRequestOpts(): runtime.RequestOpts {
         const queryParameters: any = {};
 
         const headerParameters: runtime.HTTPHeaders = {};
@@ -213,7 +213,7 @@ export class FakeApi extends runtime.BaseAPI {
     /**
      * Creates request options for fakeHealthGet without sending the request
      */
-    async fakeHealthGetRequestOpts(): Promise<runtime.RequestOpts> {
+    fakeHealthGetRequestOpts(): runtime.RequestOpts {
         const queryParameters: any = {};
 
         const headerParameters: runtime.HTTPHeaders = {};
@@ -304,7 +304,7 @@ export class FakeApi extends runtime.BaseAPI {
     /**
      * Creates request options for fakeOuterBooleanSerialize without sending the request
      */
-    async fakeOuterBooleanSerializeRequestOpts(requestParameters: FakeOuterBooleanSerializeRequest): Promise<runtime.RequestOpts> {
+    fakeOuterBooleanSerializeRequestOpts(requestParameters: FakeOuterBooleanSerializeRequest): runtime.RequestOpts {
         const queryParameters: any = {};
 
         const headerParameters: runtime.HTTPHeaders = {};
@@ -348,7 +348,7 @@ export class FakeApi extends runtime.BaseAPI {
     /**
      * Creates request options for fakeOuterCompositeSerialize without sending the request
      */
-    async fakeOuterCompositeSerializeRequestOpts(requestParameters: FakeOuterCompositeSerializeRequest): Promise<runtime.RequestOpts> {
+    fakeOuterCompositeSerializeRequestOpts(requestParameters: FakeOuterCompositeSerializeRequest): runtime.RequestOpts {
         const queryParameters: any = {};
 
         const headerParameters: runtime.HTTPHeaders = {};
@@ -388,7 +388,7 @@ export class FakeApi extends runtime.BaseAPI {
     /**
      * Creates request options for fakeOuterNumberSerialize without sending the request
      */
-    async fakeOuterNumberSerializeRequestOpts(requestParameters: FakeOuterNumberSerializeRequest): Promise<runtime.RequestOpts> {
+    fakeOuterNumberSerializeRequestOpts(requestParameters: FakeOuterNumberSerializeRequest): runtime.RequestOpts {
         const queryParameters: any = {};
 
         const headerParameters: runtime.HTTPHeaders = {};
@@ -432,7 +432,7 @@ export class FakeApi extends runtime.BaseAPI {
     /**
      * Creates request options for fakeOuterStringSerialize without sending the request
      */
-    async fakeOuterStringSerializeRequestOpts(requestParameters: FakeOuterStringSerializeRequest): Promise<runtime.RequestOpts> {
+    fakeOuterStringSerializeRequestOpts(requestParameters: FakeOuterStringSerializeRequest): runtime.RequestOpts {
         const queryParameters: any = {};
 
         const headerParameters: runtime.HTTPHeaders = {};
@@ -476,7 +476,7 @@ export class FakeApi extends runtime.BaseAPI {
     /**
      * Creates request options for fakePropertyEnumIntegerSerialize without sending the request
      */
-    async fakePropertyEnumIntegerSerializeRequestOpts(requestParameters: FakePropertyEnumIntegerSerializeRequest): Promise<runtime.RequestOpts> {
+    fakePropertyEnumIntegerSerializeRequestOpts(requestParameters: FakePropertyEnumIntegerSerializeRequest): runtime.RequestOpts {
         if (requestParameters['outerObjectWithEnumProperty'] == null) {
             throw new runtime.RequiredError(
                 'outerObjectWithEnumProperty',
@@ -523,7 +523,7 @@ export class FakeApi extends runtime.BaseAPI {
     /**
      * Creates request options for testAdditionalPropertiesReference without sending the request
      */
-    async testAdditionalPropertiesReferenceRequestOpts(requestParameters: TestAdditionalPropertiesReferenceRequest): Promise<runtime.RequestOpts> {
+    testAdditionalPropertiesReferenceRequestOpts(requestParameters: TestAdditionalPropertiesReferenceRequest): runtime.RequestOpts {
         if (requestParameters['requestBody'] == null) {
             throw new runtime.RequiredError(
                 'requestBody',
@@ -571,7 +571,7 @@ export class FakeApi extends runtime.BaseAPI {
     /**
      * Creates request options for testBodyWithBinary without sending the request
      */
-    async testBodyWithBinaryRequestOpts(requestParameters: TestBodyWithBinaryRequest): Promise<runtime.RequestOpts> {
+    testBodyWithBinaryRequestOpts(requestParameters: TestBodyWithBinaryRequest): runtime.RequestOpts {
         if (requestParameters['body'] == null) {
             throw new runtime.RequiredError(
                 'body',
@@ -617,7 +617,7 @@ export class FakeApi extends runtime.BaseAPI {
     /**
      * Creates request options for testBodyWithFileSchema without sending the request
      */
-    async testBodyWithFileSchemaRequestOpts(requestParameters: TestBodyWithFileSchemaRequest): Promise<runtime.RequestOpts> {
+    testBodyWithFileSchemaRequestOpts(requestParameters: TestBodyWithFileSchemaRequest): runtime.RequestOpts {
         if (requestParameters['fileSchemaTestClass'] == null) {
             throw new runtime.RequiredError(
                 'fileSchemaTestClass',
@@ -663,7 +663,7 @@ export class FakeApi extends runtime.BaseAPI {
     /**
      * Creates request options for testBodyWithQueryParams without sending the request
      */
-    async testBodyWithQueryParamsRequestOpts(requestParameters: TestBodyWithQueryParamsRequest): Promise<runtime.RequestOpts> {
+    testBodyWithQueryParamsRequestOpts(requestParameters: TestBodyWithQueryParamsRequest): runtime.RequestOpts {
         if (requestParameters['query'] == null) {
             throw new runtime.RequiredError(
                 'query',
@@ -718,7 +718,7 @@ export class FakeApi extends runtime.BaseAPI {
     /**
      * Creates request options for testClientModel without sending the request
      */
-    async testClientModelRequestOpts(requestParameters: TestClientModelRequest): Promise<runtime.RequestOpts> {
+    testClientModelRequestOpts(requestParameters: TestClientModelRequest): runtime.RequestOpts {
         if (requestParameters['client'] == null) {
             throw new runtime.RequiredError(
                 'client',
@@ -909,7 +909,7 @@ export class FakeApi extends runtime.BaseAPI {
     /**
      * Creates request options for testEnumParameters without sending the request
      */
-    async testEnumParametersRequestOpts(requestParameters: TestEnumParametersRequest): Promise<runtime.RequestOpts> {
+    testEnumParametersRequestOpts(requestParameters: TestEnumParametersRequest): runtime.RequestOpts {
         const queryParameters: any = {};
 
         if (requestParameters['enumQueryStringArray'] != null) {
@@ -1089,7 +1089,7 @@ export class FakeApi extends runtime.BaseAPI {
     /**
      * Creates request options for testInlineAdditionalProperties without sending the request
      */
-    async testInlineAdditionalPropertiesRequestOpts(requestParameters: TestInlineAdditionalPropertiesRequest): Promise<runtime.RequestOpts> {
+    testInlineAdditionalPropertiesRequestOpts(requestParameters: TestInlineAdditionalPropertiesRequest): runtime.RequestOpts {
         if (requestParameters['requestBody'] == null) {
             throw new runtime.RequiredError(
                 'requestBody',
@@ -1137,7 +1137,7 @@ export class FakeApi extends runtime.BaseAPI {
     /**
      * Creates request options for testInlineFreeformAdditionalProperties without sending the request
      */
-    async testInlineFreeformAdditionalPropertiesRequestOpts(requestParameters: TestInlineFreeformAdditionalPropertiesOperationRequest): Promise<runtime.RequestOpts> {
+    testInlineFreeformAdditionalPropertiesRequestOpts(requestParameters: TestInlineFreeformAdditionalPropertiesOperationRequest): runtime.RequestOpts {
         if (requestParameters['testInlineFreeformAdditionalPropertiesRequest'] == null) {
             throw new runtime.RequiredError(
                 'testInlineFreeformAdditionalPropertiesRequest',
@@ -1185,7 +1185,7 @@ export class FakeApi extends runtime.BaseAPI {
     /**
      * Creates request options for testJsonFormData without sending the request
      */
-    async testJsonFormDataRequestOpts(requestParameters: TestJsonFormDataRequest): Promise<runtime.RequestOpts> {
+    testJsonFormDataRequestOpts(requestParameters: TestJsonFormDataRequest): runtime.RequestOpts {
         if (requestParameters['param'] == null) {
             throw new runtime.RequiredError(
                 'param',
@@ -1260,7 +1260,7 @@ export class FakeApi extends runtime.BaseAPI {
     /**
      * Creates request options for testNullable without sending the request
      */
-    async testNullableRequestOpts(requestParameters: TestNullableRequest): Promise<runtime.RequestOpts> {
+    testNullableRequestOpts(requestParameters: TestNullableRequest): runtime.RequestOpts {
         if (requestParameters['childWithNullable'] == null) {
             throw new runtime.RequiredError(
                 'childWithNullable',
@@ -1308,7 +1308,7 @@ export class FakeApi extends runtime.BaseAPI {
     /**
      * Creates request options for testQueryParameterCollectionFormat without sending the request
      */
-    async testQueryParameterCollectionFormatRequestOpts(requestParameters: TestQueryParameterCollectionFormatRequest): Promise<runtime.RequestOpts> {
+    testQueryParameterCollectionFormatRequestOpts(requestParameters: TestQueryParameterCollectionFormatRequest): runtime.RequestOpts {
         if (requestParameters['pipe'] == null) {
             throw new runtime.RequiredError(
                 'pipe',
@@ -1416,7 +1416,7 @@ export class FakeApi extends runtime.BaseAPI {
     /**
      * Creates request options for testStringMapReference without sending the request
      */
-    async testStringMapReferenceRequestOpts(requestParameters: TestStringMapReferenceRequest): Promise<runtime.RequestOpts> {
+    testStringMapReferenceRequestOpts(requestParameters: TestStringMapReferenceRequest): runtime.RequestOpts {
         if (requestParameters['requestBody'] == null) {
             throw new runtime.RequiredError(
                 'requestBody',

samples/client/petstore/typescript-fetch/builds/default-v3.0/apis/StoreApi.ts

@@ -42,7 +42,7 @@ export class StoreApi extends runtime.BaseAPI {
     /**
      * Creates request options for deleteOrder without sending the request
      */
-    async deleteOrderRequestOpts(requestParameters: DeleteOrderRequest): Promise<runtime.RequestOpts> {
+    deleteOrderRequestOpts(requestParameters: DeleteOrderRequest): runtime.RequestOpts {
         if (requestParameters['orderId'] == null) {
             throw new runtime.RequiredError(
                 'orderId',
@@ -131,7 +131,7 @@ export class StoreApi extends runtime.BaseAPI {
     /**
      * Creates request options for getOrderById without sending the request
      */
-    async getOrderByIdRequestOpts(requestParameters: GetOrderByIdRequest): Promise<runtime.RequestOpts> {
+    getOrderByIdRequestOpts(requestParameters: GetOrderByIdRequest): runtime.RequestOpts {
         if (requestParameters['orderId'] == null) {
             throw new runtime.RequiredError(
                 'orderId',
@@ -178,7 +178,7 @@ export class StoreApi extends runtime.BaseAPI {
     /**
      * Creates request options for placeOrder without sending the request
      */
-    async placeOrderRequestOpts(requestParameters: PlaceOrderRequest): Promise<runtime.RequestOpts> {
+    placeOrderRequestOpts(requestParameters: PlaceOrderRequest): runtime.RequestOpts {
         if (requestParameters['order'] == null) {
             throw new runtime.RequiredError(
                 'order',