fix: imply babelrc and configFile from requireConfigFile

eslint/babel-eslint-parser/src/worker/configuration.cjs

@@ -20,11 +20,18 @@ function getParserPlugins(babelOptions) {
   return [["estree", estreeOptions], ...babelParserPlugins];
 }
 
-function normalizeParserOptions(options) {
+// @private
+// exported for unit test purpose only
+exports.normalizeParserOptions = normalizeParserOptions;
+
+function normalizeParserOptions(options = {}) {
+  const { babelOptions = {} } = options;
   return {
     sourceType: options.sourceType,
     filename: options.filePath,
-    ...options.babelOptions,
+    babelrc: options.requireConfigFile ? undefined : false,
+    configFile: options.requireConfigFile ? undefined : false,
+    ...babelOptions,
     parserOpts: {
       ...(process.env.BABEL_8_BREAKING
         ? {}
@@ -36,16 +43,16 @@ function normalizeParserOptions(options) {
       allowReturnOutsideFunction:
         options.ecmaFeatures?.globalReturn ??
         (process.env.BABEL_8_BREAKING ? false : true),
-      ...options.babelOptions.parserOpts,
-      plugins: getParserPlugins(options.babelOptions),
+      ...babelOptions.parserOpts,
+      plugins: getParserPlugins(babelOptions),
       // skip comment attaching for parsing performance
       attachComment: false,
       ranges: true,
       tokens: true,
     },
     caller: {
       name: "@babel/eslint-parser",
-      ...options.babelOptions.caller,
+      ...babelOptions.caller,
     },
   };
 }

eslint/babel-eslint-parser/test/worker/configuration.skip-bundled.js

@@ -0,0 +1,43 @@
+import { normalizeParserOptions } from "../../lib/worker/configuration.cjs";
+
+describe("normalizeParserOptions", () => {
+  describe("requireConfigFile", () => {
+    it("should imply 'babelrc' and 'configFile' from 'requireConfigFile'", () => {
+      const result = normalizeParserOptions({ requireConfigFile: false });
+      expect(result).toHaveProperty("babelrc", false);
+      expect(result).toHaveProperty("configFile", false);
+    });
+    it("The implied result can be overriden by 'babelOptions'", () => {
+      const result = normalizeParserOptions({
+        requireConfigFile: false,
+        babelOptions: {
+          babelrc: undefined,
+          configFile: undefined,
+        },
+      });
+      expect(result).toHaveProperty("babelrc", undefined);
+      expect(result).toHaveProperty("configFile", undefined);
+    });
+  });
+  it("default parserOpts", () => {
+    const result = normalizeParserOptions({ requireConfigFile: false });
+    expect(result.parserOpts).toMatchInlineSnapshot(`
+      Object {
+        "allowImportExportEverywhere": false,
+        "allowReturnOutsideFunction": true,
+        "allowSuperOutsideMethod": true,
+        "attachComment": false,
+        "plugins": Array [
+          Array [
+            "estree",
+            Object {
+              "classFeatures": false,
+            },
+          ],
+        ],
+        "ranges": true,
+        "tokens": true,
+      }
+    `);
+  });
+});