Map ESLint's sourceType: commonjs to script (#17349)

JLHwung · web-flow · commit 0c51d8f213c9 · 2025-06-01T08:00:52.000-04:00
diff --git a/eslint/babel-eslint-parser/src/configuration.cts b/eslint/babel-eslint-parser/src/configuration.cts
@@ -13,7 +13,9 @@ export = function normalizeESLintConfig(options: any) {
   return {
     babelOptions: { cwd: process.cwd(), ...babelOptions },
     ecmaVersion: ecmaVersion === "latest" ? 1e8 : ecmaVersion,
-    sourceType,
+    // https://eslint.org/docs/latest/use/configure/language-options#specifying-javascript-options
+    // ESLint supports "commonjs" but Babel parser does not.
+    sourceType: sourceType === "commonjs" ? "script" : sourceType,
     requireConfigFile,
     ...otherOptions,
   } as Options;
diff --git a/eslint/babel-eslint-tests/test/integration/eslint/config.js b/eslint/babel-eslint-tests/test/integration/eslint/config.js
@@ -20,4 +20,19 @@ describe("ESLint config", () => {
       },
     );
   });
+
+  it('should allow sourceType to be "commonjs"', () => {
+    // sourceType "commonjs" allows require() calls.
+    verifyAndAssertMessages(
+      'require("greetings").hello',
+      {},
+      undefined,
+      undefined,
+      {
+        parserOptions: {
+          sourceType: "commonjs",
+        },
+      },
+    );
+  });
 });
