fix(typescript): Use builtin extends resolution (#199)

Author: NotWoods

.gitignore

@@ -12,3 +12,4 @@ pnpm-debug.log
 
 !packages/node-resolve/test/fixtures/**/node_modules
 !packages/commonjs/test/**/node_modules
+!packages/typescript/test/fixtures/**/node_modules

packages/typescript/src/options.ts

@@ -114,12 +114,6 @@ function readTsConfigFile(ts: typeof import('typescript'), tsConfigPath: string)
     throw Object.assign(Error(), diagnosticToWarning(ts, null, error));
   }
 
-  const extendedTsConfig: string = config?.extends;
-  if (extendedTsConfig) {
-    // Get absolute path of `extends`, starting at basedir of the tsconfig file.
-    config.extends = resolve(process.cwd(), tsConfigPath, '..', extendedTsConfig);
-  }
-
   return config || {};
 }
 

packages/typescript/test/fixtures/tsconfig-extends-module/main.tsx

@@ -0,0 +1,3 @@
+const props = {};
+// @ts-ignore
+export default <span {...props}>Yo!</span>;

packages/typescript/test/fixtures/tsconfig-extends-module/node_modules/shared-config/package.json

@@ -0,0 +1,6 @@
+{
+  "extends": "shared-config",
+  "compilerOptions": {
+    "allowJs": true
+  }
+}

packages/typescript/test/fixtures/tsconfig-extends-module/node_modules/shared-config/tsconfig.json

@@ -347,6 +347,22 @@ test.serial('should support extends property with given tsconfig', async (t) =>
   t.not(usage, -1, 'should contain usage');
 });
 
+test.serial('should support extends property with node resolution', async (t) => {
+  process.chdir('fixtures/tsconfig-extends-module');
+
+  const bundle = await rollup({
+    input: 'main.tsx',
+    plugins: [
+      typescript()
+    ],
+    onwarn
+  });
+  const code = await getCode(bundle, outputOptions);
+
+  const usage = code.includes('React.createElement("span", __assign({}, props), "Yo!")');
+  t.true(usage, 'should contain usage');
+});
+
 test('complies code that uses browser functions', async (t) => {
   const bundle = await rollup({
     input: 'fixtures/dom/main.ts',