CodeSampleX

サンプル

@babel/core 7.29.6: buildExternalHelpers

検証済みサンプル — npm @babel/core 7.29.6: buildExternalHelpers. node 22 · linux debian/x64 · docker で contract を実行し、成功しました: buildExternalHelpers returns all runtime…

sha256:b7449e514e82dd74df3bc5519a8589e814df596e6ae44f1fd293946dbfa2d4ab

このネットワークが提供するのは一つだけです。ビルドされるサンプル。サンドボックスで実行し、署名済みの受領証を保管します。等級はつけず、何も保証しません — 同じコードがあなたの環境でビルドされるかは測定していません。 合格した契約受領証を提出した異なる署名鍵の数です。1 なら作者だけ、2 以上なら他の誰かもビルドしています。鍵は自己生成で背後に登録された身元がないため、数えているのは人ではなく鍵です。 MIT-0

実行証拠

宣言された環境と署名済みの実行を分けてあります。このサンプルが何をどこで実行したかをそのまま確認できます。

証拠の基準
署名済みコントラクト合格
検証レシート
1
ビルドした署名鍵
1
宣言された環境 node 22.23 linux 24 · ubuntu · glibc 2.39 x64 node 22.23 javascript npm 10

検証実行環境

環境 コントラクト ステージ 実行日
node 22 · linux debian/x64 · docker ed25519:c1973797be207ac4 PASS compile:SKIPPED · contract:PASS · load:PASS · resolve:PASS
CONTAINER_RUN · node-typescript@1node:22@sha256:8a34c4ab3ea2…		 2026-09-03

ケース

HOW
ゴール
verify @babel/core.buildExternalHelpers in pkg:npm/%40babel/core@7.29.6
パッケージ
シンボル
  • @babel/core.buildExternalHelpers
環境
node 22.23.2
作成日
2026-09-03T11:58:34Z

コントラクト

  1. buildExternalHelpers returns all runtime helpers wrapped in a global scope function when called without arguments
  2. buildExternalHelpers emits only requested helpers when an explicit allowlist array is specified
  3. buildExternalHelpers supports global, module, var, and umd output formats
  4. buildExternalHelpers with var output format returns executable JavaScript that evaluates to the babelHelpers object
  5. buildExternalHelpers throws an Error matching Unsupported output type when an invalid output format is specified
  6. buildExternalHelpers allowlist filters strictly and does not automatically resolve helper dependencies
  7. helpers generated with var format execute correctly in a sandbox environment for class inheritance and type checking

ファイル

  • PROMPT.md
  • csx.json
  • package-lock.json
  • package.json
  • spec.json
  • src/index.js
  • test/contract.js

ソースアーティファクトをダウンロード (tar.gz)

ソース

PROMPT.md
Clean-room public code sample — generation instructions

Write a brand-new, minimal, self-contained code sample in this clean-room directory.
Do not copy, paraphrase, or reference any existing project source. Work only from this spec.

A csx.json manifest scaffold already exists. Do not recreate it from memory. Preserve its case.goal, packages and symbols; fill its empty case.contract with exact assertions and correct its environment, commands and verifierAdapter for the files you generate.

Goal: verify @babel/core.buildExternalHelpers in pkg:npm/%40babel/core@7.29.6
Kind: HOW

Use EXACTLY these public packages and versions:
  - pkg:npm/%40babel/core@7.29.6
Demonstrate these symbols/APIs:
  - @babel/core.buildExternalHelpers
Constraints:
  - executionContext: node
Required runtime conditions:
  - ecosystem: npm
  - language: javascript
  - moduleSystem: cjs
  - packageManager: npm@10.9.8
  - runtime: node@22.23.2

Rules:
  - One focused purpose; the smallest project that proves the goal.
  - Include a contract test (test/contract.*) that runs OFFLINE and exits 0 exactly when the goal behavior works.
  - Pin every dependency with a lockfile so resolution is reproducible.
  - No secrets, credentials, or tokens. No real URLs (only example.com or localhost). No absolute paths.
  - No personal names, emails, company names, or project identifiers of any kind.
  - No binaries and no generated output (node_modules, dist, target, venv, .git, .env).
  - Keep it under 200 files and 256KB packed.
csx.json
{"case":{"caseId":"case:sha256:8091d93127da200137d46dd9b8fbb8056c1c83656d4dfeadeec505c043114ca5","constraints":{"executionContext":"node"},"contract":["buildExternalHelpers returns all runtime helpers wrapped in a global scope function when called without arguments","buildExternalHelpers emits only requested helpers when an explicit allowlist array is specified","buildExternalHelpers supports global, module, var, and umd output formats","buildExternalHelpers with var output format returns executable JavaScript that evaluates to the babelHelpers object","buildExternalHelpers throws an Error matching Unsupported output type when an invalid output format is specified","buildExternalHelpers allowlist filters strictly and does not automatically resolve helper dependencies","helpers generated with var format execute correctly in a sandbox environment for class inheritance and type checking"],"goal":"verify @babel/core.buildExternalHelpers in pkg:npm/%40babel/core@7.29.6","kind":"HOW","packages":["pkg:npm/%40babel/core@7.29.6"],"schemaVersion":1,"symbols":["@babel/core.buildExternalHelpers"]},"contractCommand":["node","test/contract.js"],"environment":{"arch":"x64","distro":"ubuntu","ecosystem":"npm","executionContext":"node","language":"javascript","libc":"glibc","libcVersion":"2.39","moduleSystem":"cjs","os":"linux","osVersionBucket":"24","packageManager":"npm","packageManagerVersion":"10.9.8","runtime":"node","runtimeVersion":"22.23.2","schemaVersion":1},"license":"MIT-0","packages":["pkg:npm/%40babel/core@7.29.6"],"schemaVersion":1,"subject":"pkg:npm/%40babel/core@7.29.6","symbols":["@babel/core.buildExternalHelpers"],"verifierAdapter":"node-typescript@1"}
package-lock.json
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  "name": "sample-babel-buildexternalhelpers",
  "version": "1.0.0",
  "lockfileVersion": 3,
  "requires": true,
  "packages": {
    "": {
      "name": "sample-babel-buildexternalhelpers",
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    },
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package.json
{
  "name": "sample-babel-buildexternalhelpers",
  "version": "1.0.0",
  "description": "verify @babel/core.buildExternalHelpers in pkg:npm/%40babel/core@7.29.6",
  "main": "src/index.js",
  "scripts": {
    "test": "node test/contract.js"
  },
  "dependencies": {
    "@babel/core": "7.29.6"
  },
  "license": "MIT-0"
}
spec.json
{
  "schemaVersion": 1,
  "goal": "verify @babel/core.buildExternalHelpers in pkg:npm/%40babel/core@7.29.6",
  "kind": "HOW",
  "packages": [
    "pkg:npm/%40babel/core@7.29.6"
  ],
  "symbols": [
    "@babel/core.buildExternalHelpers"
  ],
  "constraints": {
    "executionContext": "node"
  },
  "runtimeConditions": {
    "ecosystem": "npm",
    "language": "javascript",
    "moduleSystem": "cjs",
    "packageManager": "npm@10.9.8",
    "runtime": "node@22.23.2"
  }
}
src/index.js
const babel = require('@babel/core');
const vm = require('vm');

/**
 * Builds all external helpers in the specified output format.
 *
 * @param {string} [outputType='global'] - Output format ('global', 'module', 'var', 'umd').
 * @returns {string} The generated helper code.
 */
function buildAllHelpers(outputType = 'global') {
  return babel.buildExternalHelpers(undefined, outputType);
}

/**
 * Builds external helpers for a specific list of helper names.
 *
 * @param {string[]} allowlist - Array of helper names to include.
 * @param {string} [outputType='global'] - Output format ('global', 'module', 'var', 'umd').
 * @returns {string} The generated helper code.
 */
function buildHelpers(allowlist, outputType = 'global') {
  return babel.buildExternalHelpers(allowlist, outputType);
}

/**
 * Builds external helpers with 'var' format and evaluates them in a VM context.
 *
 * @param {string[]} allowlist - Array of helper names to include.
 * @param {object} [context={}] - Optional sandbox context.
 * @returns {object} The babelHelpers object.
 */
function buildHelpersInContext(allowlist, context = {}) {
  const code = babel.buildExternalHelpers(allowlist, 'var');
  const sandbox = vm.createContext(context);
  return vm.runInContext(code, sandbox);
}

module.exports = {
  buildAllHelpers,
  buildHelpers,
  buildHelpersInContext
};
test/contract.js
const assert = require('assert');
const {
  buildAllHelpers,
  buildHelpers,
  buildHelpersInContext
} = require('../src/index.js');

// 1. buildExternalHelpers returns all runtime helpers wrapped in a global scope function when called without arguments
{
  const code = buildAllHelpers();
  assert.strictEqual(typeof code, 'string', 'Helpers output must be a string');
  assert.ok(code.length > 50000, 'Default helpers output should contain all helpers');
  assert.ok(code.includes('var babelHelpers = global.babelHelpers = {};'), 'Should initialize global babelHelpers');
  assert.ok(code.includes('babelHelpers.inherits = _inherits;'), 'Should include standard helper definitions');
}

// 2. buildExternalHelpers emits only requested helpers when an explicit allowlist array is specified
{
  const code = buildHelpers(['classCallCheck']);
  assert.strictEqual(typeof code, 'string', 'Allowlist helpers output must be a string');
  assert.ok(code.includes('babelHelpers.classCallCheck = _classCallCheck;'), 'Should include requested helper');
  assert.strictEqual(code.includes('babelHelpers.inherits = _inherits;'), false, 'Should exclude unrequested helpers');
}

// 3. buildExternalHelpers supports global, module, var, and umd output formats
{
  const globalCode = buildHelpers(['inherits'], 'global');
  assert.ok(globalCode.includes('(function (global) {'), 'Global format should include IIFE wrapper');

  const moduleCode = buildHelpers(['inherits'], 'module');
  assert.ok(moduleCode.includes('export { _inherits as inherits };'), 'Module format should export helper');

  const varCode = buildHelpers(['inherits'], 'var');
  assert.ok(varCode.includes('var babelHelpers = {};'), 'Var format should declare babelHelpers variable');
  assert.ok(varCode.trim().endsWith('babelHelpers;'), 'Var format should evaluate to babelHelpers');

  const umdCode = buildHelpers(['inherits'], 'umd');
  assert.ok(umdCode.includes('define(["exports"], factory);'), 'UMD format should support AMD definition');
  assert.ok(umdCode.includes('typeof exports === "object"'), 'UMD format should support CommonJS exports');
}

// 4. buildExternalHelpers with var output format returns executable JavaScript that evaluates to the babelHelpers object
{
  const helpers = buildHelpersInContext(['classCallCheck']);
  assert.strictEqual(typeof helpers, 'object', 'Helpers result must be an object');
  assert.strictEqual(typeof helpers.classCallCheck, 'function', 'classCallCheck must be an executable function');
}

// 5. buildExternalHelpers throws an Error matching Unsupported output type when an invalid output format is specified
{
  assert.throws(
    () => buildHelpers(['inherits'], 'unsupported_format'),
    /Unsupported output type unsupported_format/
  );
}

// 6. buildExternalHelpers allowlist filters strictly and does not automatically resolve helper dependencies
{
  const withoutDep = buildHelpers(['inherits'], 'var');
  assert.ok(withoutDep.includes('babelHelpers.inherits = _inherits;'), 'Should include requested inherits helper');
  assert.strictEqual(withoutDep.includes('babelHelpers.setPrototypeOf = _setPrototypeOf;'), false, 'Should omit unrequested dependency setPrototypeOf');

  const withDep = buildHelpers(['inherits', 'setPrototypeOf'], 'var');
  assert.ok(withDep.includes('babelHelpers.inherits = _inherits;'), 'Should include inherits helper');
  assert.ok(withDep.includes('babelHelpers.setPrototypeOf = _setPrototypeOf;'), 'Should include explicitly requested setPrototypeOf helper');
}

// 7. helpers generated with var format execute correctly in a sandbox environment for class inheritance and type checking
{
  const helpers = buildHelpersInContext(['classCallCheck', 'inherits', 'setPrototypeOf']);

  function SuperClass() {}
  function SubClass() {
    helpers.classCallCheck(this, SubClass);
  }
  helpers.inherits(SubClass, SuperClass);

  const instance = new SubClass();
  assert.ok(instance instanceof SubClass, 'instance should be SubClass instance');
  assert.ok(instance instanceof SuperClass, 'instance should be SuperClass instance');
  assert.strictEqual(Object.getPrototypeOf(SubClass.prototype), SuperClass.prototype);
  assert.strictEqual(Object.getPrototypeOf(SubClass), SuperClass);

  assert.throws(
    () => SubClass(),
    /Cannot call a class as a function/
  );
}

console.log('All contract assertions passed successfully.');

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