Remove remaining lodash dependencies (#13139)

packages/babel-cli/package.json

@@ -28,7 +28,6 @@
     "convert-source-map": "^1.1.0",
     "fs-readdir-recursive": "^1.1.0",
     "glob": "^7.0.0",
-    "lodash": "^4.17.19",
     "make-dir": "^2.1.0",
     "slash": "condition:BABEL_8_BREAKING ? ^3.0.0 : ^2.0.0",
     "source-map": "^0.5.0"

packages/babel-cli/src/babel/dir.js

@@ -1,6 +1,5 @@
 // @flow
 
-import debounce from "lodash/debounce";
 import slash from "slash";
 import path from "path";
 import fs from "fs";
@@ -135,27 +134,23 @@ export default async function ({
   let compiledFiles = 0;
   let startTime = null;
 
-  const logSuccess = debounce(
-    function () {
-      if (startTime === null) {
-        // This should never happen, but just in case it's better
-        // to ignore the log message rather than making @babel/cli crash.
-        return;
-      }
+  const logSuccess = util.debounce(function () {
+    if (startTime === null) {
+      // This should never happen, but just in case it's better
+      // to ignore the log message rather than making @babel/cli crash.
+      return;
+    }
 
-      const diff = process.hrtime(startTime);
+    const diff = process.hrtime(startTime);
 
-      console.log(
-        `Successfully compiled ${compiledFiles} ${
-          compiledFiles !== 1 ? "files" : "file"
-        } with Babel (${diff[0] * 1e3 + Math.round(diff[1] / 1e6)}ms).`,
-      );
-      compiledFiles = 0;
-      startTime = null;
-    },
-    100,
-    { trailing: true },
-  );
+    console.log(
+      `Successfully compiled ${compiledFiles} ${
+        compiledFiles !== 1 ? "files" : "file"
+      } with Babel (${diff[0] * 1e3 + Math.round(diff[1] / 1e6)}ms).`,
+    );
+    compiledFiles = 0;
+    startTime = null;
+  }, 100);
 
   if (!cliOptions.skipInitialBuild) {
     if (cliOptions.deleteDirOnStart) {

packages/babel-cli/src/babel/util.js

@@ -141,3 +141,16 @@ export function withExtension(filename: string, ext: string = ".js") {
   const newBasename = path.basename(filename, path.extname(filename)) + ext;
   return path.join(path.dirname(filename), newBasename);
 }
+
+export function debounce(fn: () => void, time: number) {
+  let timer;
+  function debounced() {
+    clearTimeout(timer);
+    timer = setTimeout(fn, time);
+  }
+  debounced.flush = () => {
+    clearTimeout(timer);
+    fn();
+  };
+  return debounced;
+}

packages/babel-core/package.json

@@ -68,7 +68,6 @@
     "@babel/helper-transform-fixture-test-runner": "workspace:*",
     "@types/convert-source-map": "^1.5.1",
     "@types/debug": "^4.1.0",
-    "@types/lodash": "^4.14.150",
     "@types/resolve": "^1.3.2",
     "@types/semver": "^5.4.0",
     "@types/source-map": "^0.5.0"

packages/babel-generator/package.json

@@ -27,7 +27,6 @@
     "@babel/helper-fixtures": "workspace:*",
     "@babel/parser": "workspace:*",
     "@types/jsesc": "^2.5.0",
-    "@types/lodash": "^4.14.150",
     "@types/source-map": "^0.5.0"
   }
 }

packages/babel-plugin-transform-function-name/test/fixtures/function-name/modules-2/input.mjs

@@ -1,4 +1,4 @@
-import last from "lodash/last"
+import last from "lo-dash/last"
 
 export default class Container {
   last(key) {

packages/babel-plugin-transform-function-name/test/fixtures/function-name/modules-2/output.js

@@ -5,7 +5,7 @@ Object.defineProperty(exports, "__esModule", {
 });
 exports.default = void 0;
 
-var _last2 = babelHelpers.interopRequireDefault(require("lodash/last"));
+var _last2 = babelHelpers.interopRequireDefault(require("lo-dash/last"));
 
 let Container = /*#__PURE__*/function () {
   function Container() {

packages/babel-register/package.json

@@ -17,8 +17,8 @@
     "./lib/nodeWrapper.js": "./lib/browser.js"
   },
   "dependencies": {
+    "clone-deep": "^4.0.1",
     "find-cache-dir": "condition:BABEL_8_BREAKING ? ^3.3.1 : ^2.0.0",
-    "lodash": "^4.17.19",
     "make-dir": "^2.1.0",
     "pirates": "^4.0.0",
     "source-map-support": "^0.5.16"

packages/babel-register/src/node.js

@@ -1,4 +1,4 @@
-import deepClone from "lodash/cloneDeep";
+import cloneDeep from "clone-deep";
 import sourceMapSupport from "source-map-support";
 import * as registerCache from "./cache";
 import * as babel from "@babel/core";
@@ -42,7 +42,7 @@ function compile(code, filename) {
     // sourceRoot can be overwritten
     {
       sourceRoot: path.dirname(filename) + path.sep,
-      ...deepClone(transformOpts),
+      ...cloneDeep(transformOpts),
       filename,
     },
   );

packages/babel-register/test/fixtures/internal-modules/index.js

@@ -22,7 +22,6 @@ register( {
 
 console.log(
   JSON.stringify({
-    convertSourceMap: require('convert-source-map').fromObject.toString(),
-    isPlainObject: require('lodash/isPlainObject').toString()
+    convertSourceMap: require('convert-source-map').fromObject.toString()
   })
 );

packages/babel-register/test/index.js

@@ -198,16 +198,14 @@ describe("@babel/register", function () {
 
   test("transforms modules used within register", callback => {
     // Need a clean environment without `convert-source-map`
-    // and `lodash/isPlainObject` already in the require cache,
-    // so we spawn a separate process
+    // already in the require cache, so we spawn a separate process
 
     spawnNode([internalModulesTestFile], output => {
       let err;
 
       try {
-        const { convertSourceMap, isPlainObject } = JSON.parse(output);
+        const { convertSourceMap } = JSON.parse(output);
         expect(convertSourceMap).toMatch("/* transformed */");
-        expect(isPlainObject).toMatch("/* transformed */");
       } catch (e) {
         err = e;
       }

packages/babel-types/package.json

@@ -25,13 +25,11 @@
   },
   "dependencies": {
     "@babel/helper-validator-identifier": "workspace:^7.12.11",
-    "lodash": "^4.17.19",
     "to-fast-properties": "^2.0.0"
   },
   "devDependencies": {
     "@babel/generator": "workspace:*",
     "@babel/parser": "workspace:*",
-    "@types/lodash": "^4.14.162",
     "chalk": "^4.1.0"
   }
 }

packages/babel-types/src/converters/valueToNode.ts

@@ -1,4 +1,3 @@
-import isPlainObject from "lodash/isPlainObject";
 import isValidIdentifier from "../validators/isValidIdentifier";
 import {
   identifier,
@@ -25,15 +24,27 @@ export default valueToNode as {
   (value: RegExp): t.RegExpLiteral;
   (value: ReadonlyArray<unknown>): t.ArrayExpression;
 
-  // this throws with objects that are not PlainObject according to lodash,
+  // this throws with objects that are not plain objects,
   // or if there are non-valueToNode-able values
   (value: object): t.ObjectExpression;
 
   (value: unknown): t.Expression;
 };
 
+const objectToString: (value: object) => string = Function.call.bind(
+  Object.prototype.toString,
+);
+
 function isRegExp(value): value is RegExp {
-  return Object.prototype.toString.call(value) === "[object RegExp]";
+  return objectToString(value) === "[object RegExp]";
+}
+
+function isPlainObject(value): value is object {
+  if (typeof value !== "object" || value === null) {
+    return false;
+  }
+  const proto = Object.getPrototypeOf(value);
+  return proto === null || proto === Object.prototype;
 }
 
 function valueToNode(value: unknown): t.Expression {