Use native ESM for dev scripts (#12296)

Co-authored-by: Nicolò Ribaudo <nicolo.ribaudo@gmail.com>

scripts/parser-tests/flow/index.js

@@ -1,7 +1,10 @@
-const fs = require("fs").promises;
-const path = require("path");
-const merge = require("mergeiterator");
-const TestRunner = require("../utils/parser-test-runner");
+import fs from "fs/promises";
+import path from "path";
+import { fileURLToPath } from "url";
+import merge from "mergeiterator";
+import TestRunner from "../utils/parser-test-runner.js";
+
+const dirname = path.dirname(fileURLToPath(import.meta.url));
 
 const flowOptionsMapping = {
   esproposal_class_instance_fields: "classProperties",
@@ -88,8 +91,8 @@ async function* loadTests(root) {
 }
 
 const runner = new TestRunner({
-  testDir: path.join(__dirname, "../../../build/flow/src/parser/test/flow"),
-  allowlist: path.join(__dirname, "allowlist.txt"),
+  testDir: path.join(dirname, "../../../build/flow/src/parser/test/flow"),
+  allowlist: path.join(dirname, "allowlist.txt"),
   shouldUpdate: process.argv.includes("--update-allowlist"),
 
   async *getTests() {

scripts/parser-tests/test262/index.js

@@ -1,6 +1,9 @@
-const path = require("path");
-const TestStream = require("test262-stream");
-const TestRunner = require("../utils/parser-test-runner");
+import path from "path";
+import { fileURLToPath } from "url";
+import TestStream from "test262-stream";
+import TestRunner from "../utils/parser-test-runner.js";
+
+const dirname = path.dirname(fileURLToPath(import.meta.url));
 
 const ignoredFeatures = [
   "__getter__",
@@ -163,8 +166,8 @@ function* getPlugins(features) {
 }
 
 const runner = new TestRunner({
-  testDir: path.join(__dirname, "../../../build/test262"),
-  allowlist: path.join(__dirname, "allowlist.txt"),
+  testDir: path.join(dirname, "../../../build/test262"),
+  allowlist: path.join(dirname, "allowlist.txt"),
   logInterval: 500,
   shouldUpdate: process.argv.includes("--update-allowlist"),
 

scripts/parser-tests/typescript/error-codes.js

@@ -8,7 +8,7 @@ Note that babel-parser should not throw for the TypeChecking Diagnostics
 The commented out diagnostic codes will introduce false positive cases that should be addressed in separate PRs.
 */
 
-module.exports = [
+export default [
   // "TS1005", // '{0}' expected.
   "TS1009", // Trailing comma not allowed.
   "TS1014", // A rest parameter must be last in a parameter list.

scripts/parser-tests/typescript/index.js

@@ -1,8 +1,11 @@
-const path = require("path");
-const fs = require("fs").promises;
-const ts = require("../../../build/typescript");
-const TestRunner = require("../utils/parser-test-runner");
-const parsingErrorCodes = require("./error-codes");
+import path from "path";
+import fs from "fs/promises";
+import { fileURLToPath } from "url";
+import ts from "../../../build/typescript/lib/typescript.js";
+import TestRunner from "../utils/parser-test-runner.js";
+import parsingErrorCodes from "./error-codes.js";
+
+const dirname = path.dirname(fileURLToPath(import.meta.url));
 
 async function* loadTests(dir) {
   const names = await fs.readdir(dir);
@@ -21,7 +24,7 @@ const plugins = [
   "dynamicImport",
 ];
 
-const TSTestsPath = path.join(__dirname, "../../../build/typescript/tests");
+const TSTestsPath = path.join(dirname, "../../../build/typescript/tests");
 
 // Check if the baseline errors contain the codes that should also be thrown from babel-parser
 async function baselineContainsParserErrorCodes(testName) {
@@ -45,7 +48,7 @@ async function baselineContainsParserErrorCodes(testName) {
 
 const runner = new TestRunner({
   testDir: path.join(TSTestsPath, "./cases/compiler"),
-  allowlist: path.join(__dirname, "allowlist.txt"),
+  allowlist: path.join(dirname, "allowlist.txt"),
   logInterval: 50,
   shouldUpdate: process.argv.includes("--update-allowlist"),
 

scripts/parser-tests/utils/parser-test-runner.js

@@ -1,8 +1,6 @@
-"use strict";
-
-const fs = require("fs").promises;
-const chalk = require("chalk");
-const { parse: parser } = require("../../../packages/babel-parser");
+import fs from "fs/promises";
+import chalk from "chalk";
+import { parse as parser } from "../../../packages/babel-parser/lib/index.js";
 
 const dot = chalk.gray(".");
 
@@ -234,4 +232,4 @@ class TestRunner {
   }
 }
 
-module.exports = exports = TestRunner;
+export default TestRunner;