Remove some lodash/cloneDeep calls (#13032)

Author: jridgewell

packages/babel-core/package.json

@@ -43,7 +43,8 @@
     "./lib/transform-file.js": "./lib/transform-file-browser.js",
     "./src/config/files/index.js": "./src/config/files/index-browser.js",
     "./src/config/resolve-targets.js": "./src/config/resolve-targets-browser.js",
-    "./src/transform-file.js": "./src/transform-file-browser.js"
+    "./src/transform-file.js": "./src/transform-file-browser.js",
+    "./src/transformation/util/clone-deep.js": "./src/transformation/util/clone-deep-browser.js"
   },
   "dependencies": {
     "@babel/code-frame": "workspace:^7.12.13",

packages/babel-core/src/transformation/normalize-file.js

@@ -3,13 +3,13 @@
 import fs from "fs";
 import path from "path";
 import buildDebug from "debug";
-import cloneDeep from "lodash/cloneDeep";
 import type { Handler } from "gensync";
 import * as t from "@babel/types";
 import type { PluginPasses } from "../config";
 import convertSourceMap, { typeof Converter } from "convert-source-map";
 import File from "./file/file";
 import parser from "../parser";
+import cloneDeep from "./util/clone-deep";
 
 const debug = buildDebug("babel:transform:file");
 const LARGE_INPUT_SOURCEMAP_THRESHOLD = 1_000_000;
@@ -35,8 +35,7 @@ export default function* normalizeFile(
       throw new Error("AST root must be a Program or File node");
     }
 
-    const { cloneInputAst } = options;
-    if (cloneInputAst) {
+    if (options.cloneInputAst) {
       ast = cloneDeep(ast);
     }
   } else {

packages/babel-core/src/transformation/util/clone-deep-browser.js

@@ -0,0 +1,19 @@
+const serialized = "$$ babel internal serialized type" + Math.random();
+
+function serialize(key, value) {
+  if (typeof value !== "bigint") return value;
+  return {
+    [serialized]: "BigInt",
+    value: value.toString(),
+  };
+}
+
+function revive(key, value) {
+  if (!value || typeof value !== "object") return value;
+  if (value[serialized] !== "BigInt") return value;
+  return BigInt(value.value);
+}
+
+export default function (value) {
+  return JSON.parse(JSON.stringify(value, serialize), revive);
+}

packages/babel-core/src/transformation/util/clone-deep.js

@@ -0,0 +1,9 @@
+import v8 from "v8";
+import cloneDeep from "./clone-deep-browser";
+
+export default function (value) {
+  if (v8.deserialize && v8.serialize) {
+    return v8.deserialize(v8.serialize(value));
+  }
+  return cloneDeep(value);
+}

packages/babel-helper-fixtures/package.json

@@ -15,11 +15,9 @@
   "homepage": "https://babel.dev/docs/en/next/babel-helper-fixtures",
   "main": "lib/index.js",
   "dependencies": {
-    "lodash": "^4.17.19",
     "semver": "condition:BABEL_8_BREAKING ? ^7.3.4 : ^6.3.0"
   },
   "devDependencies": {
-    "@types/lodash": "^4.14.150",
     "@types/semver": "^7.3.4"
   }
 }

packages/babel-helper-fixtures/src/index.ts

@@ -1,4 +1,3 @@
-import cloneDeep from "lodash/cloneDeep";
 import semver from "semver";
 import path from "path";
 import fs from "fs";
@@ -121,7 +120,7 @@ function pushTask(taskName, taskDir, suite, suiteName) {
     execLocAlias = suiteName + "/" + taskName;
   }
 
-  const taskOpts = cloneDeep(suite.options);
+  const taskOpts = JSON.parse(JSON.stringify(suite.options));
 
   const taskOptsLoc = tryResolve(taskDir + "/options");
   if (taskOptsLoc) Object.assign(taskOpts, require(taskOptsLoc));

packages/babel-traverse/package.json

@@ -23,8 +23,7 @@
     "@babel/parser": "workspace:^7.13.0",
     "@babel/types": "workspace:^7.13.0",
     "debug": "^4.1.0",
-    "globals": "condition:BABEL_8_BREAKING ? ^13.5.0 : ^11.1.0",
-    "lodash": "^4.17.19"
+    "globals": "condition:BABEL_8_BREAKING ? ^13.5.0 : ^11.1.0"
   },
   "devDependencies": {
     "@babel/helper-plugin-test-runner": "workspace:*"

packages/babel-traverse/test/traverse.js

@@ -1,4 +1,3 @@
-import cloneDeep from "lodash/cloneDeep";
 import traverse from "../lib";
 import { parse } from "@babel/parser";
 import * as t from "@babel/types";
@@ -17,7 +16,7 @@ describe("traverse", function () {
       type: "StringLiteral",
       value: "foo",
     };
-    const ast2 = cloneDeep(program);
+    const ast2 = JSON.parse(JSON.stringify(program));
 
     traverse(ast2, {
       enter: function (path) {

yarn.lock

@@ -542,9 +542,7 @@ __metadata:
   version: 0.0.0-use.local
   resolution: "@babel/helper-fixtures@workspace:packages/babel-helper-fixtures"
   dependencies:
-    "@types/lodash": ^4.14.150
     "@types/semver": ^7.3.4
-    lodash: ^4.17.19
     semver: "condition:BABEL_8_BREAKING ? ^7.3.4 : ^6.3.0"
   languageName: unknown
   linkType: soft
@@ -3470,7 +3468,6 @@ __metadata:
     "@babel/types": "workspace:^7.13.0"
     debug: ^4.1.0
     globals: "condition:BABEL_8_BREAKING ? ^13.5.0 : ^11.1.0"
-    lodash: ^4.17.19
   languageName: unknown
   linkType: soft