From b6bf39b1cc4ca037a16f5b02c619ed5c36e6d598 Mon Sep 17 00:00:00 2001
From: Hiroki Osame <hiroki.osame@gmail.com>
Date: Thu, 23 May 2024 12:47:16 +0900
Subject: [PATCH] fix: only error on invalid tsconfig if explicitly passed in
 (#30)

---
 src/utils/tsconfig.ts   | 17 ++++++++++++++++-
 tests/specs/api.ts      |  7 ++-----
 tests/specs/tsconfig.ts | 26 ++++++++++++++++++++++++++
 3 files changed, 44 insertions(+), 6 deletions(-)

diff --git a/src/utils/tsconfig.ts b/src/utils/tsconfig.ts
index cc8a0b73..3f474736 100644
--- a/src/utils/tsconfig.ts
+++ b/src/utils/tsconfig.ts
@@ -28,7 +28,22 @@ export const loadTsconfig = (
 			config: parseTsconfig(resolvedConfigPath),
 		};
 	} else {
-		tsconfig = getTsconfig();
+		try {
+			tsconfig = getTsconfig();
+		} catch {
+			// Not warning here for now because it gets warned twice
+			// Once by ESM loader and then by CJS loader
+			// const disableWarning = (
+			// 	getFlag('--no-warnings', Boolean)
+			// 	|| Boolean(process.env.NODE_NO_WARNINGS)
+			// );
+			// if (!disableWarning) {
+			// 	if (error instanceof Error) {
+			// 		console.warn(`(tsx:${process.pid}) [-----] TsconfigWarning:`, error.message);
+			// 	}
+			// }
+		}
+
 		if (!tsconfig) {
 			return;
 		}
diff --git a/tests/specs/api.ts b/tests/specs/api.ts
index ca4be2fd..83fa061f 100644
--- a/tests/specs/api.ts
+++ b/tests/specs/api.ts
@@ -287,7 +287,7 @@ export default testSuite(({ describe }, node: NodeApis) => {
 					});
 
 					describe('tsconfig', ({ test }) => {
-						test('should error on unresolvable tsconfig', async () => {
+						test('should ignore detected unresolvable tsconfig', async () => {
 							await using fixture = await createFixture({
 								'tsconfig.json': createTsconfig({
 									extends: 'doesnt-exist',
@@ -298,14 +298,11 @@ export default testSuite(({ describe }, node: NodeApis) => {
 								`,
 							});
 
-							const { exitCode, stderr } = await execaNode('register.mjs', [], {
-								reject: false,
+							await execaNode('register.mjs', [], {
 								cwd: fixture.path,
 								nodePath: node.path,
 								nodeOptions: [],
 							});
-							expect(exitCode).toBe(1);
-							expect(stderr).toMatch('File \'doesnt-exist\' not found.');
 						});
 
 						test('disable lookup', async () => {
diff --git a/tests/specs/tsconfig.ts b/tests/specs/tsconfig.ts
index 630b7363..2c8539c8 100644
--- a/tests/specs/tsconfig.ts
+++ b/tests/specs/tsconfig.ts
@@ -113,6 +113,19 @@ export default testSuite(async ({ describe }, { tsx }: NodeApis) => {
 				onFinish(async () => await fixture.rm());
 
 				describe('detected tsconfig', ({ test }) => {
+					test('invalid tsconfig should be ignored', async () => {
+						await using fixture = await createFixture({
+							'package.json': createPackageJson({ type: packageType }),
+							'tsconfig.json': createTsconfig({
+								extends: 'doesnt-exist',
+							}),
+							'index.ts': '',
+						});
+
+						const pTsconfig = await tsx(['index.ts'], fixture.path);
+						expect(pTsconfig.failed).toBe(false);
+					});
+
 					test('tsconfig', async ({ onTestFail }) => {
 						const pTsconfig = await tsx(['index.tsx'], fixture.path);
 						onTestFail((error) => {
@@ -126,6 +139,19 @@ export default testSuite(async ({ describe }, { tsx }: NodeApis) => {
 				});
 
 				describe('custom tsconfig', ({ test }) => {
+					test('invalid tsconfig should error', async () => {
+						await using fixture = await createFixture({
+							'package.json': createPackageJson({ type: packageType }),
+							'tsconfig.json': createTsconfig({
+								extends: 'doesnt-exist',
+							}),
+							'index.ts': '',
+						});
+
+						const pTsconfig = await tsx(['--tsconfig', 'tsconfig.json', 'index.ts'], fixture.path);
+						expect(pTsconfig.failed).toBe(true);
+					});
+
 					test('custom tsconfig', async ({ onTestFail }) => {
 						const pTsconfigAllowJs = await tsx(['--tsconfig', 'tsconfig-allowJs.json', 'jsx.jsx'], fixture.path);
 						onTestFail((error) => {