feat: add cdktfAppFile

src/CdktfConfig.ts

@@ -32,7 +32,6 @@ export interface TerraformDependencyConstraint {
 
 export type RequirementDefinition = string | TerraformDependencyConstraint;
 
-// TODO: Use `type ObjectValues<T> = T[keyof T];` instead of enum
 export enum Language {
   TYPESCRIPT = 'typescript',
   PYTHON = 'python',
@@ -142,15 +141,15 @@ export class CdktfConfig extends Component {
     }
 
     const filename = 'cdktf.json';
-    const key = 'projectId';
+    const projectIdKey = 'projectId';
     const filePath = path.join(project.outdir, filename);
 
     let projectId: string | undefined;
     if (fs.existsSync(filePath)) {
       const optionsFile = fs.readFileSync(filePath, 'utf8');
       const optionsObject = JSON.parse(optionsFile);
 
-      projectId = optionsObject[key];
+      projectId = optionsObject[projectIdKey];
     }
 
     this.app = options.app;

src/CdktfTypescriptApp.ts

@@ -22,6 +22,13 @@ export interface CdktfTypeScriptAppOptions extends typescript.TypeScriptProjectO
    * @default "latest"
    */
   readonly constructsVersion: string;
+
+  /**
+   * The file containing the CDKTF app
+   *
+   * @default "main.ts"
+   */
+  readonly cdktfAppFile?: string;
 }
 
 export class CdktfTypeScriptApp extends TypeScriptAppProject {
@@ -61,8 +68,10 @@ export class CdktfTypeScriptApp extends TypeScriptAppProject {
     // No compile step because we do all of it in typescript directly
     this.compileTask.reset();
 
+    const appFile = options.cdktfAppFile ?? 'main.ts';
+
     this.cdktfConfig = new CdktfConfig(this, {
-      app: 'npx ts-node main.ts',
+      app: `npx ts-node ${appFile}`,
       language: Language.TYPESCRIPT,
       ...options.cdktfConfig,
     });

test/CdktfTypescriptApp.test.ts

@@ -1,7 +1,34 @@
 import { Language } from '../src/CdktfConfig';
 import { CdktfTypeScriptApp } from '../src/CdktfTypescriptApp';
 
-describe('CdktfApp', () => {
+describe('CdktfTypeScriptApp', () => {
+  describe('cdktfAppFile', () => {
+    test('should use `main.ts` by default', () => {
+      const app = new CdktfTypeScriptApp({
+        name: 'test_project',
+        defaultReleaseBranch: 'main',
+        cdktfVersion: '0.0.0',
+        constructsVersion: '0.0.0',
+      });
+
+      expect(app.cdktfConfig.app).toStrictEqual('npx ts-node main.ts');
+    });
+
+    test('can be overridden with custom file', () => {
+      const appFile = 'src/main.ts';
+
+      const app = new CdktfTypeScriptApp({
+        name: 'test_project',
+        defaultReleaseBranch: 'main',
+        cdktfVersion: '0.0.0',
+        constructsVersion: '0.0.0',
+        cdktfAppFile: appFile,
+      });
+
+      expect(app.cdktfConfig.app).toStrictEqual(`npx ts-node ${appFile}`);
+    });
+  });
+
   describe('app', () => {
     test('should use `ts-node` by default', () => {
       const app = new CdktfTypeScriptApp({