feature: babel-eslint-parser passes through config options

eslint/babel-eslint-parser/README.md

@@ -56,7 +56,7 @@ Additional configuration options can be set in your ESLint configuration under t
 - `sourceType` can be set to `"module"`(default) or `"script"` if your code isn't using ECMAScript modules.
 - `allowImportExportEverywhere` (default `false`) can be set to `true` to allow import and export declarations to appear anywhere a statement is allowed if your build environment supports that. Otherwise import and export declarations can only appear at a program's top level.
 - `ecmaFeatures.globalReturn` (default `false`) allow return statements in the global scope when used with `sourceType: "script"`.
-- `babelOptions` passes through Babel's configuration [loading](https://babeljs.io/docs/en/options#config-loading-options) and [merging](https://babeljs.io/docs/en/options#config-merging-options) options (for instance, in case of a monorepo). When not defined, @babel/eslint-parser will use Babel's default configuration file resolution logic.
+- `babelOptions` is an object containing Babel configuration [options](https://babeljs.io/docs/en/options) that are passed to Babel's parser at runtime.  For cases where users might not want to use a Babel configuration file or are running Babel through another tool (such as Webpack with `babel-loader`).
 
 **.eslintrc.js**
 

eslint/babel-eslint-parser/src/configuration.js

@@ -6,6 +6,7 @@ export function normalizeESLintConfig(options) {
     ecmaVersion: 2020,
     sourceType: "module",
     allowImportExportEverywhere: false,
+    requireConfigFile: true,
   };
 
   return Object.assign(defaultOptions, options);
@@ -15,31 +16,19 @@ export function normalizeBabelParseConfig(options) {
   const parseOptions = {
     sourceType: options.sourceType,
     filename: options.filePath,
-    cwd: options.babelOptions.cwd,
-    root: options.babelOptions.root,
-    rootMode: options.babelOptions.rootMode,
-    envName: options.babelOptions.envName,
-    configFile: options.babelOptions.configFile,
-    babelrc: options.babelOptions.babelrc,
-    babelrcRoots: options.babelOptions.babelrcRoots,
-    extends: options.babelOptions.extends,
-    env: options.babelOptions.env,
-    overrides: options.babelOptions.overrides,
-    test: options.babelOptions.test,
-    include: options.babelOptions.include,
-    exclude: options.babelOptions.exclude,
-    ignore: options.babelOptions.ignore,
-    only: options.babelOptions.only,
+    ...options.babelOptions,
     parserOpts: {
       allowImportExportEverywhere: options.allowImportExportEverywhere,
       allowReturnOutsideFunction: true,
       allowSuperOutsideMethod: true,
+      ...options.babelOptions.parserOpts,
+      plugins: ["estree", ...(options.babelOptions.parserOpts?.plugins ?? [])],
       ranges: true,
       tokens: true,
-      plugins: ["estree"],
     },
     caller: {
       name: "@babel/eslint-parser",
+      ...options.babelOptions.caller,
     },
   };
 

eslint/babel-eslint-parser/src/index.js

@@ -1,8 +1,16 @@
 import semver from "semver";
-import { version as CURRENT_BABEL_VERSION } from "@babel/core";
-import parseWithScope from "./parse-with-scope";
-import { normalizeESLintConfig } from "./configuration";
+import {
+  version as CURRENT_BABEL_VERSION,
+  parseSync as babelParse,
+} from "@babel/core";
 import packageJson from "../package.json";
+import {
+  normalizeBabelParseConfig,
+  normalizeESLintConfig,
+} from "./configuration";
+import convert from "./convert";
+import analyzeScope from "./analyze-scope";
+import visitorKeys from "./visitor-keys";
 
 const SUPPORTED_BABEL_VERSION_RANGE =
   packageJson.peerDependencies["@babel/core"];
@@ -11,16 +19,40 @@ const IS_RUNNING_SUPPORTED_VERSION = semver.satisfies(
   SUPPORTED_BABEL_VERSION_RANGE,
 );
 
-export function parse(code, options) {
-  return parseForESLint(code, options).ast;
-}
-
-export function parseForESLint(code, options = {}) {
+function baseParse(code, options) {
   if (!IS_RUNNING_SUPPORTED_VERSION) {
     throw new Error(
       `babel-eslint@${packageJson.version} does not support @babel/core@${CURRENT_BABEL_VERSION}. Please downgrade to babel-eslint@^10 or upgrade to @babel/core@${SUPPORTED_BABEL_VERSION_RANGE}`,
     );
   }
 
-  return parseWithScope(code, normalizeESLintConfig(options));
+  const parseOptions = normalizeBabelParseConfig(options);
+  let ast;
+
+  try {
+    ast = babelParse(code, parseOptions);
+  } catch (err) {
+    if (err instanceof SyntaxError) {
+      err.lineNumber = err.loc.line;
+      err.column = err.loc.column;
+    }
+
+    throw err;
+  }
+
+  convert(ast, code);
+
+  return ast;
+}
+
+export function parse(code, options = {}) {
+  return baseParse(code, normalizeESLintConfig(options));
+}
+
+export function parseForESLint(code, options = {}) {
+  const normalizedOptions = normalizeESLintConfig(options);
+  const ast = baseParse(code, normalizedOptions);
+  const scopeManager = analyzeScope(ast, normalizedOptions);
+
+  return { ast, scopeManager, visitorKeys };
 }