Cleanup

Gulpfile.mjs

@@ -28,7 +28,7 @@ import rollupBabelSource from "./scripts/rollup-plugin-babel-source.js";
 import formatCode from "./scripts/utils/formatCode.js";
 
 const require = createRequire(import.meta.url);
-const monorepoRoot = path.dirname(fileURLToPath(import.meta.url));
+const monorepoRoot = new URL(".", import.meta.url).pathname;
 
 const defaultPackagesGlob = "./@(codemods|packages|eslint)/*";
 const defaultSourcesGlob = `${defaultPackagesGlob}/src/**/{*.js,*.cjs,!(*.d).ts}`;

babel.config.js

@@ -307,11 +307,18 @@ function pluginPolyfillsOldNode({ template, types: t }) {
         process.allowedNodeEnvironmentFlags || require("node-environment-flags")
       `,
     },
+    {
+      // This became a global in Node.js 10
+      name: "URL",
+      necessary: () => true,
+      supported: () => true,
+      replacement: template`require("url").URL`,
+    },
   ];
 
   return {
     visitor: {
-      MemberExpression(path) {
+      "MemberExpression|ReferencedIdentifier"(path) {
         for (const polyfill of polyfills) {
           if (!path.matchesPattern(polyfill.name)) continue;
 

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

@@ -1,15 +1,14 @@
 import path from "path";
 import escope from "eslint-scope";
 import unpad from "dedent";
-import { fileURLToPath } from "url";
 import { createRequire } from "module";
 import { parseForESLint } from "../src";
 
 const BABEL_OPTIONS = {
-  configFile: path.resolve(
-    path.dirname(fileURLToPath(import.meta.url)),
+  configFile: new URL(
     "../../babel-eslint-shared-fixtures/config/babel.config.js",
-  ),
+    import.meta.url,
+  ).pathname,
 };
 const PROPS_TO_REMOVE = [
   "importKind",

eslint/babel-eslint-plugin-development-internal/test/rules/dry-error-messages.js

@@ -1,9 +1,8 @@
 import path from "path";
 import rule from "../../src/rules/dry-error-messages";
 import RuleTester from "../../../babel-eslint-shared-fixtures/utils/RuleTester";
-import { fileURLToPath } from "url";
 
-const dirname = path.dirname(fileURLToPath(import.meta.url));
+const dirname = new URL(".", import.meta.url).pathname;
 
 const FILENAME = path.resolve(dirname, "test/lib/index.js");
 const ERRORS_MODULE = "errorsModule";

eslint/babel-eslint-tests/test/helpers/verifyAndAssertMessages.js

@@ -1,7 +1,5 @@
 import eslint from "eslint";
 import unpad from "dedent";
-import path from "path";
-import { fileURLToPath } from "url";
 import * as parser from "../../../babel-eslint-parser";
 
 export default function verifyAndAssertMessages(
@@ -26,10 +24,10 @@ export default function verifyAndAssertMessages(
       sourceType,
       requireConfigFile: false,
       babelOptions: {
-        configFile: path.resolve(
-          path.dirname(fileURLToPath(import.meta.url)),
+        configFile: new URL(
           "../../../babel-eslint-shared-fixtures/config/babel.config.js",
-        ),
+          import.meta.url,
+        ).pathname,
       },
       ...overrideConfig?.parserOptions,
     },

eslint/babel-eslint-tests/test/integration/eslint-plugin-import.js

@@ -1,16 +1,13 @@
 import eslint from "eslint";
-import path from "path";
-import { fileURLToPath } from "url";
 
 describe("https://github.com/babel/babel-eslint/issues/558", () => {
   it("doesn't crash with eslint-plugin-import", () => {
     const engine = new eslint.CLIEngine({ ignore: false });
     engine.executeOnFiles(
-      ["a.js", "b.js", "c.js"].map(file =>
-        path.resolve(
-          path.dirname(fileURLToPath(import.meta.url)),
-          `../fixtures/eslint-plugin-import/${file}`,
-        ),
+      ["a.js", "b.js", "c.js"].map(
+        file =>
+          new URL(`../fixtures/eslint-plugin-import/${file}`, import.meta.url)
+            .pathname,
       ),
     );
   });

eslint/babel-eslint-tests/test/integration/eslint/config.js

@@ -1,6 +1,4 @@
 import eslint from "eslint";
-import path from "path";
-import { fileURLToPath } from "url";
 import * as parser from "@babel/eslint-parser";
 
 describe("ESLint config", () => {
@@ -12,10 +10,10 @@ describe("ESLint config", () => {
       parser: "@babel/eslint-parser",
       parserOptions: {
         babelOptions: {
-          configFile: path.resolve(
-            path.dirname(fileURLToPath(import.meta.url)),
+          configFile: new URL(
             "../../../../babel-eslint-shared-fixtures/config/babel.config.js",
-          ),
+            import.meta.url,
+          ).pathname,
         },
       },
     });

eslint/babel-eslint-tests/test/integration/eslint/rules/strict.js

@@ -2,17 +2,11 @@ import eslint from "eslint";
 import fs from "fs";
 import path from "path";
 import * as parser from "../../../../../babel-eslint-parser";
-import { fileURLToPath } from "url";
 
 eslint.linter.defineParser("@babel/eslint-parser", parser);
 
 const paths = {
-  fixtures: path.join(
-    path.dirname(fileURLToPath(import.meta.url)),
-    "../../..",
-    "fixtures",
-    "rules",
-  ),
+  fixtures: new URL("../../../fixtures/rules", import.meta.url).pathname,
 };
 
 const encoding = "utf8";

eslint/babel-eslint-tests/test/integration/eslint/verify.js

@@ -1,6 +1,4 @@
 import verifyAndAssertMessages from "../../helpers/verifyAndAssertMessages";
-import path from "path";
-import { fileURLToPath } from "url";
 
 describe("verify", () => {
   it("arrow function support (issue #1)", () => {
@@ -1082,10 +1080,10 @@ describe("verify", () => {
         parserOptions: {
           sourceType,
           babelOptions: {
-            configFile: path.resolve(
-              path.dirname(fileURLToPath(import.meta.url)),
+            configFile: new URL(
               "../../../../babel-eslint-shared-fixtures/config/babel.config.decorators-legacy.js",
-            ),
+              import.meta.url,
+            ).pathname,
           },
         },
       };

packages/babel-cli/test/index.js

@@ -7,17 +7,15 @@ import escapeRegExp from "lodash/escapeRegExp";
 import merge from "lodash/merge";
 import path from "path";
 import fs from "fs";
-import { fileURLToPath } from "url";
 import { createRequire } from "module";
 
 import { chmod } from "../lib/babel/util";
 
 const require = createRequire(import.meta.url);
 
-const dirname = path.dirname(fileURLToPath(import.meta.url));
-const fixtureLoc = path.join(dirname, "fixtures");
-const tmpLoc = path.join(dirname, "tmp");
-const rootDir = path.resolve(dirname, "../../..");
+const fixtureLoc = new URL("./fixtures", import.meta.url).pathname;
+const tmpLoc = new URL("./tmp", import.meta.url).pathname;
+const rootDir = new URL("../../..", import.meta.url).pathname;
 
 const fileFilter = function (x) {
   return x !== ".DS_Store";
@@ -64,13 +62,13 @@ const normalizeOutput = function (str, cwd) {
     .replace(new RegExp(escapeRegExp(cwd), "g"), "<CWD>")
     // (non-win32) /foo/babel/packages -> <CWD>/packages
     // (win32) C:\foo\babel\packages -> <CWD>\packages
-    .replace(new RegExp(escapeRegExp(rootDir), "g"), "<ROOTDIR>");
+    .replace(new RegExp(escapeRegExp(rootDir), "g"), "<ROOTDIR>/");
   if (process.platform === "win32") {
     result = result
       // C:\\foo\\babel\\packages -> <CWD>\\packages (in js string literal)
       .replace(
-        new RegExp(escapeRegExp(rootDir.replace(/\\/g, "\\\\")), "g"),
-        "<ROOTDIR>",
+        new RegExp(escapeRegExp(rootDir.replace(/\//g, "\\\\")), "g"),
+        "<ROOTDIR>\\",
       );
   }
   return result;
@@ -137,7 +135,7 @@ const assertTest = function (stdout, stderr, opts, cwd) {
 };
 
 const buildTest = function (binName, testName, opts) {
-  const binLoc = path.join(dirname, "../lib", binName);
+  const binLoc = new URL(`../lib/${binName}`, import.meta.url).pathname;
 
   return function (callback) {
     saveInFiles(opts.inFiles);

packages/babel-core/test/api.js

@@ -3,13 +3,12 @@ import sourceMap from "source-map";
 import path from "path";
 import Plugin from "../lib/config/plugin";
 import generator from "@babel/generator";
-import { fileURLToPath } from "url";
 
 import presetEnv from "../../babel-preset-env";
 import pluginSyntaxFlow from "../../babel-plugin-syntax-flow";
 import pluginFlowStripTypes from "../../babel-plugin-transform-flow-strip-types";
 
-const cwd = path.dirname(fileURLToPath(import.meta.url));
+const cwd = new URL(".", import.meta.url).pathname;
 
 function assertIgnored(result) {
   expect(result).toBeNull();

packages/babel-core/test/assumptions.js

@@ -1,8 +1,6 @@
-import path from "path";
-import { fileURLToPath } from "url";
 import { loadOptions as loadOptionsOrig, transformSync } from "../lib";
 
-const cwd = path.dirname(fileURLToPath(import.meta.url));
+const cwd = new URL(".", import.meta.url).pathname;
 
 function loadOptions(opts) {
   return loadOptionsOrig({ cwd, ...opts });

packages/babel-core/test/async.js

@@ -1,5 +1,3 @@
-import path from "path";
-import { fileURLToPath } from "url";
 import * as babel from "..";
 
 import {
@@ -15,11 +13,7 @@ const nodeGte8 = (...args) => {
 };
 
 describe("asynchronicity", () => {
-  const base = path.join(
-    path.dirname(fileURLToPath(import.meta.url)),
-    "fixtures",
-    "async",
-  );
+  const base = new URL("./fixtures/async", import.meta.url).pathname;
   let cwd;
 
   beforeEach(function () {

packages/babel-core/test/config-chain.js

@@ -1,12 +1,9 @@
 import fs from "fs";
 import os from "os";
 import path from "path";
-import { fileURLToPath } from "url";
 import escapeRegExp from "lodash/escapeRegExp";
 import * as babel from "../lib";
 
-const dirname = path.dirname(fileURLToPath(import.meta.url));
-
 import { isMJS, loadOptionsAsync, skipUnsupportedESM } from "./helpers/esm";
 
 // TODO: In Babel 8, we can directly uses fs.promises which is supported by
@@ -45,11 +42,14 @@ const pfs =
   });
 
 function fixture(...args) {
-  return path.join(dirname, "fixtures", "config", ...args);
+  return new URL(`./fixtures/config/${args.join("/")}`, import.meta.url)
+    .pathname;
 }
 
+const cwd = new URL(".", import.meta.url).pathname;
+
 function loadOptions(opts) {
-  return babel.loadOptions({ cwd: dirname, ...opts });
+  return babel.loadOptions({ cwd, ...opts });
 }
 
 function pairs(items) {

packages/babel-core/test/config-loading.js

@@ -3,21 +3,17 @@ import loadConfigRunner, {
   createConfigItem,
 } from "../lib/config";
 import path from "path";
-import { fileURLToPath } from "url";
 import { createRequire } from "module";
 
 const require = createRequire(import.meta.url);
 
 const loadConfig = loadConfigRunner.sync;
 
 describe("@babel/core config loading", () => {
-  const FILEPATH = path.join(
-    path.dirname(fileURLToPath(import.meta.url)),
-    "fixtures",
-    "config-loading",
-    "folder",
-    "example.js",
-  );
+  const FILEPATH = new URL(
+    "./fixtures/config-loading/folder/example.js",
+    import.meta.url,
+  ).pathname;
 
   afterEach(() => {
     delete process.env.INVALIDATE_BABELRC;

packages/babel-core/test/helpers/esm.js

@@ -1,13 +1,12 @@
 import cp from "child_process";
 import util from "util";
 import path from "path";
-import { fileURLToPath } from "url";
 import { createRequire } from "module";
 
 import * as babel from "../../lib";
 
 const require = createRequire(import.meta.url);
-const dirname = path.dirname(fileURLToPath(import.meta.url));
+const dirname = new URL(".", import.meta.url).pathname;
 
 // "minNodeVersion": "10.0.0" <-- For Ctrl+F when dropping node 10
 const nodeSupportsESM = parseInt(process.versions.node) >= 12;

packages/babel-core/test/option-manager.js

@@ -1,8 +1,7 @@
 import { loadOptions as loadOptionsOrig } from "../lib";
 import path from "path";
-import { fileURLToPath } from "url";
 
-const cwd = path.dirname(fileURLToPath(import.meta.url));
+const cwd = new URL(".", import.meta.url).pathname;
 
 function loadOptions(opts) {
   return loadOptionsOrig({ cwd, ...opts });

packages/babel-core/test/parse.js

@@ -1,18 +1,12 @@
 import fs from "fs";
-import path from "path";
 import { parse } from "../lib";
-import { fileURLToPath } from "url";
 import { createRequire } from "module";
 
 const require = createRequire(import.meta.url);
 
 function fixture(...args) {
-  return path.join(
-    path.dirname(fileURLToPath(import.meta.url)),
-    "fixtures",
-    "parse",
-    ...args,
-  );
+  return new URL(`./fixtures/parse/${args.join("/")}`, import.meta.url)
+    .pathname;
 }
 
 describe("parse", function () {

packages/babel-core/test/path.js

@@ -1,9 +1,7 @@
 import { transform } from "../lib/index";
 import Plugin from "../lib/config/plugin";
-import { fileURLToPath } from "url";
-import path from "path";
 
-const cwd = path.dirname(fileURLToPath(import.meta.url));
+const cwd = new URL(".", import.meta.url).pathname;
 
 describe("traversal path", function () {
   it("replaceWithSourceString", function () {

packages/babel-core/test/plugins.js

@@ -1,8 +1,3 @@
 import runner from "@babel/helper-transform-fixture-test-runner";
-import { fileURLToPath } from "url";
-import path from "path";
 
-runner(
-  path.join(path.dirname(fileURLToPath(import.meta.url)), "fixtures/plugins"),
-  "plugins",
-);
+runner(new URL("./fixtures/plugins", import.meta.url).pathname, "plugins");

packages/babel-core/test/resolution.js

@@ -1,13 +1,7 @@
 import * as babel from "../lib/index";
-import path from "path";
-import { fileURLToPath } from "url";
 
 describe("addon resolution", function () {
-  const base = path.join(
-    path.dirname(fileURLToPath(import.meta.url)),
-    "fixtures",
-    "resolution",
-  );
+  const base = new URL("./fixtures/resolution", import.meta.url).pathname;
   let cwd;
 
   beforeEach(function () {