feat: tsconfig.json by default if tsconfig.build.json not exist

lib/configuration/defaults.ts

@@ -1,4 +1,5 @@
 import { Configuration } from './configuration';
+import { getDefaultTsconfigPath } from '../utils/get-default-tsconfig-path';
 
 export const defaultConfiguration: Required<Configuration> = {
   language: 'ts',
@@ -8,7 +9,7 @@ export const defaultConfiguration: Required<Configuration> = {
   projects: {},
   monorepo: false,
   compilerOptions: {
-    tsConfigPath: 'tsconfig.build.json',
+    tsConfigPath: getDefaultTsconfigPath(),
     webpack: false,
     webpackConfigPath: 'webpack.config.js',
     plugins: [],

lib/utils/get-default-tsconfig-path.ts

@@ -0,0 +1,11 @@
+import * as fs from 'fs';
+import { join } from 'path';
+
+const TSCONFIG_BUILD_JSON = 'tsconfig.build.json';
+const TSCONFIG_JSON = 'tsconfig.json';
+
+export function getDefaultTsconfigPath() {
+  return fs.existsSync(join(process.cwd(), TSCONFIG_BUILD_JSON))
+    ? TSCONFIG_BUILD_JSON
+    : TSCONFIG_JSON;
+}

test/lib/configuration/nest-configuration.loader.spec.ts

@@ -1,6 +1,7 @@
 import { Configuration, ConfigurationLoader } from '../../../lib/configuration';
 import { NestConfigurationLoader } from '../../../lib/configuration/nest-configuration.loader';
 import { Reader } from '../../../lib/readers';
+import { getDefaultTsconfigPath } from '../../../lib/utils/get-default-tsconfig-path';
 
 describe('Nest Configuration Loader', () => {
   let reader: Reader;
@@ -48,7 +49,7 @@ describe('Nest Configuration Loader', () => {
       compilerOptions: {
         assets: [],
         plugins: [],
-        tsConfigPath: 'tsconfig.build.json',
+        tsConfigPath: getDefaultTsconfigPath(),
         webpack: false,
         webpackConfigPath: 'webpack.config.js',
       },
@@ -71,7 +72,7 @@ describe('Nest Configuration Loader', () => {
       compilerOptions: {
         assets: [],
         plugins: [],
-        tsConfigPath: 'tsconfig.build.json',
+        tsConfigPath: getDefaultTsconfigPath(),
         webpack: false,
         webpackConfigPath: 'webpack.config.js',
       },

test/lib/utils/get-default-tsconfig-path.spec.ts

@@ -0,0 +1,24 @@
+import * as fs from 'fs';
+import { getDefaultTsconfigPath } from '../../../lib/utils/get-default-tsconfig-path';
+
+jest.mock('fs', () => {
+  return {
+    existsSync: jest.fn(),
+  };
+});
+
+describe('get default tsconfig path', () => {
+  afterAll(() => {
+    jest.clearAllMocks();
+  });
+  it('should get tsconfig.json when tsconfig.build.json not exist', () => {
+    jest.spyOn(fs, 'existsSync').mockReturnValue(false);
+    const result = getDefaultTsconfigPath();
+    expect(result).toBe('tsconfig.json');
+  });
+  it('should get tsconfig.build.json when tsconfig.build.json exist', () => {
+    jest.spyOn(fs, 'existsSync').mockReturnValue(true);
+    const result = getDefaultTsconfigPath();
+    expect(result).toBe('tsconfig.build.json');
+  });
+});