Add RTKQ codegen config to toggle extensions of generated files

packages/rtk-query-codegen-openapi/src/generate.ts

@@ -118,6 +118,7 @@ export async function generateApi(
     mergeReadWriteOnly = false,
     httpResolverOptions,
     useUnknown = false,
+    esmExtensions = false,
   }: GenerationOptions
 ) {
   const v3Doc = (v3DocCache[spec] ??= await getV3Doc(spec, httpResolverOptions));
@@ -163,7 +164,17 @@ export async function generateApi(
       if (!apiFile.startsWith('.')) apiFile = `./${apiFile}`;
     }
   }
-  apiFile = apiFile.replace(/\.[jt]sx?$/, '');
+
+  if (esmExtensions === true) {
+    // Convert TS/JSX extensions to their JS equivalents
+    apiFile = apiFile
+      .replace(/\.mts$/, '.mjs')
+      .replace(/\.[jt]sx$/, '.jsx')
+      .replace(/\.ts$/, '.js');
+  } else {
+    // Remove all extensions
+    apiFile = apiFile.replace(/\.[jt]sx?$/, '');
+  }
 
   return printer.printNode(
     ts.EmitHint.Unspecified,
@@ -451,11 +462,7 @@ export async function generateApi(
         const encodedValue =
           encodeQueryParams && param.param?.in === 'query'
             ? factory.createConditionalExpression(
-                factory.createBinaryExpression(
-                  value,
-                  ts.SyntaxKind.ExclamationEqualsToken,
-                  factory.createNull()
-                ),
+                factory.createBinaryExpression(value, ts.SyntaxKind.ExclamationEqualsToken, factory.createNull()),
                 undefined,
                 factory.createCallExpression(factory.createIdentifier('encodeURIComponent'), undefined, [
                   factory.createCallExpression(factory.createIdentifier('String'), undefined, [value]),

packages/rtk-query-codegen-openapi/src/types.ts

@@ -121,6 +121,11 @@ export interface CommonOptions {
    * @since 2.1.0
    */
   useUnknown?: boolean;
+  /**
+   * @default false
+   * Will generate imports with file extension matching the expected compiled output of the api file
+   */
+  esmExtensions?: boolean;
 }
 
 export type TextMatcher = string | RegExp | (string | RegExp)[];

packages/rtk-query-codegen-openapi/test/generateEndpoints.test.ts

@@ -647,3 +647,86 @@ describe('query parameters', () => {
     expect(api).toMatchSnapshot();
   });
 });
+
+describe('esmExtensions option', () => {
+  beforeAll(async () => {
+    if (!(await isDir(tmpDir))) {
+      await fs.mkdir(tmpDir, { recursive: true });
+    }
+  });
+
+  afterEach(async () => {
+    await rimraf(`${tmpDir}/*.ts`, { glob: true });
+  });
+
+  test('should convert .ts to .js when esmExtensions is true', async () => {
+    await generateEndpoints({
+      apiFile: './fixtures/emptyApi.ts',
+      outputFile: './test/tmp/out.ts',
+      schemaFile: resolve(__dirname, 'fixtures/petstore.json'),
+      filterEndpoints: [],
+      esmExtensions: true,
+    });
+    const content = await fs.readFile('./test/tmp/out.ts', 'utf8');
+    expect(content).toContain("import { api } from '../../fixtures/emptyApi.js'");
+  });
+
+  test('should convert .mts to .mjs when esmExtensions is true', async () => {
+    await generateEndpoints({
+      apiFile: './fixtures/emptyApi.mts',
+      outputFile: './test/tmp/out.ts',
+      schemaFile: resolve(__dirname, 'fixtures/petstore.json'),
+      filterEndpoints: [],
+      esmExtensions: true,
+    });
+    const content = await fs.readFile('./test/tmp/out.ts', 'utf8');
+    expect(content).toContain("import { api } from '../../fixtures/emptyApi.mjs'");
+  });
+
+  test('should preserve .jsx when esmExtensions is true', async () => {
+    await generateEndpoints({
+      apiFile: './fixtures/emptyApi.jsx',
+      outputFile: './test/tmp/out.ts',
+      schemaFile: resolve(__dirname, 'fixtures/petstore.json'),
+      filterEndpoints: [],
+      esmExtensions: true,
+    });
+    const content = await fs.readFile('./test/tmp/out.ts', 'utf8');
+    expect(content).toContain("import { api } from '../../fixtures/emptyApi.jsx'");
+  });
+
+  test('should convert .tsx to .jsx when esmExtensions is true', async () => {
+    await generateEndpoints({
+      apiFile: './fixtures/emptyApi.tsx',
+      outputFile: './test/tmp/out.ts',
+      schemaFile: resolve(__dirname, 'fixtures/petstore.json'),
+      filterEndpoints: [],
+      esmExtensions: true,
+    });
+    const content = await fs.readFile('./test/tmp/out.ts', 'utf8');
+    expect(content).toContain("import { api } from '../../fixtures/emptyApi.jsx'");
+  });
+
+  test('should strip extensions when esmExtensions is false', async () => {
+    await generateEndpoints({
+      apiFile: './fixtures/emptyApi.ts',
+      outputFile: './test/tmp/out.ts',
+      schemaFile: resolve(__dirname, 'fixtures/petstore.json'),
+      filterEndpoints: [],
+      esmExtensions: false,
+    });
+    const content = await fs.readFile('./test/tmp/out.ts', 'utf8');
+    expect(content).toContain("import { api } from '../../fixtures/emptyApi'");
+  });
+
+  test('should strip extensions when esmExtensions is undefined (default)', async () => {
+    await generateEndpoints({
+      apiFile: './fixtures/emptyApi.ts',
+      outputFile: './test/tmp/out.ts',
+      schemaFile: resolve(__dirname, 'fixtures/petstore.json'),
+      filterEndpoints: [],
+    });
+    const content = await fs.readFile('./test/tmp/out.ts', 'utf8');
+    expect(content).toContain("import { api } from '../../fixtures/emptyApi'");
+  });
+});