CodeSampleX

Exemple

@babel/core 7.29.6: transformFileAsync

Échantillon vérifié pour npm @babel/core 7.29.6: transformFileAsync. Le contrat s'est exécuté sur node 22 · linux debian/x64 · docker et a réussi.

sha256:098fb2ecf0fc6a8a24237d84aab843945b78431b013da4870da2fd8c674c8824

Ce réseau offre une seule chose : un échantillon qui compile. Il l'a exécuté dans un bac à sable et conservé le reçu signé. Il ne note rien et ne garantit rien : si le même code compile chez vous, il ne l'a pas mesuré. Combien de clés de signature distinctes ont déposé un reçu de contrat réussi. Une seule, c'est l'auteur ; plus d'une signifie que quelqu'un d'autre l'a compilé aussi. Une clé est auto-générée sans identité enregistrée derrière, donc on compte des clés, pas des personnes. MIT-0

Preuves d'exécution

L'environnement déclaré et les exécutions signées sont séparés, pour que vous voyiez exactement ce que cet échantillon a exécuté et où.

Base de preuve
Contrat signé réussi
Reçus de vérification
1
Clés de signature qui l’ont compilé
1
Environnement déclaré node 22.23 linux 24 · ubuntu · glibc 2.39 x64 node 22.23 javascript npm 10

Environnements des exécutions de vérification

Environnement Contrat Étapes Exécution
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

Cas

HOW
Objectif
verify @babel/core.transformFileAsync in pkg:npm/%40babel/core@7.29.6
Paquets
Symboles
  • @babel/core.transformFileAsync
Environnement
node 22.23.2
Créé
2026-09-03T12:03:33Z

Contrat

  1. transformFileAsync asynchronously transforms JavaScript source file and returns a Promise resolving to an object with generated code string
  2. transformFileAsync applies custom plugin visitors asynchronously to modify AST identifiers in source file
  3. transformFileAsync generates source maps when sourceMaps option is enabled
  4. transformFileAsync returns AST File root node when ast option is set to true
  5. transformFileAsync returns null when filename matches ignore pattern
  6. transformFileAsync rejects with ENOENT error when attempting to transform nonexistent file path
  7. transformFileAsync rejects with SyntaxError containing BABEL_PARSE_ERROR code when source file contains invalid JavaScript syntax

Fichiers

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

Télécharger l’artefact source (tar.gz)

Code source

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.transformFileAsync 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.transformFileAsync
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:sha256:93ec1b446a02bc803c20bcb062fae0804dcf3a136f4131ef3ff035966a5d387a","constraints":{"executionContext":"node"},"contract":["transformFileAsync asynchronously transforms JavaScript source file and returns a Promise resolving to an object with generated code string","transformFileAsync applies custom plugin visitors asynchronously to modify AST identifiers in source file","transformFileAsync generates source maps when sourceMaps option is enabled","transformFileAsync returns AST File root node when ast option is set to true","transformFileAsync returns null when filename matches ignore pattern","transformFileAsync rejects with ENOENT error when attempting to transform nonexistent file path","transformFileAsync rejects with SyntaxError containing BABEL_PARSE_ERROR code when source file contains invalid JavaScript syntax"],"goal":"verify @babel/core.transformFileAsync in pkg:npm/%40babel/core@7.29.6","kind":"HOW","packages":["pkg:npm/%40babel/core@7.29.6"],"schemaVersion":1,"symbols":["@babel/core.transformFileAsync"]},"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.transformFileAsync"],"verifierAdapter":"node-typescript@1"}
fixtures/input.js
const message = "hello world";
function greet(name) {
  return message + " " + name;
}
fixtures/syntax-error.js
const invalid = ;
package-lock.json
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package.json
{
  "name": "sample-babel-transformfileasync",
  "version": "1.0.0",
  "description": "verify @babel/core.transformFileAsync 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.transformFileAsync in pkg:npm/%40babel/core@7.29.6",
  "kind": "HOW",
  "packages": [
    "pkg:npm/%40babel/core@7.29.6"
  ],
  "symbols": [
    "@babel/core.transformFileAsync"
  ],
  "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');

/**
 * Transforms a JavaScript source file asynchronously using @babel/core.transformFileAsync.
 *
 * @param {string} filename - Path to the file to transform.
 * @param {object} [options={}] - Babel configuration options.
 * @returns {Promise<object|null>} Transformation result object or null if ignored.
 */
function transformSourceFileAsync(filename, options = {}) {
  const defaultOptions = {
    configFile: false,
    babelrc: false,
    ...options
  };
  return babel.transformFileAsync(filename, defaultOptions);
}

/**
 * Transforms a source file asynchronously using a custom AST visitor plugin.
 *
 * @param {string} filename - Path to the file.
 * @param {object} visitor - AST visitor methods.
 * @returns {Promise<object|null>} Transformation result.
 */
function transformFileWithVisitorAsync(filename, visitor) {
  const plugin = () => ({ visitor });
  return transformSourceFileAsync(filename, {
    plugins: [plugin]
  });
}

/**
 * Transforms a source file asynchronously with source map generation enabled.
 *
 * @param {string} filename - Path to the file.
 * @returns {Promise<object|null>} Transformation result with map.
 */
function transformFileWithSourceMapAsync(filename) {
  return transformSourceFileAsync(filename, {
    sourceMaps: true
  });
}

/**
 * Transforms a source file asynchronously with AST returned.
 *
 * @param {string} filename - Path to the file.
 * @returns {Promise<object|null>} Transformation result with AST.
 */
function transformFileWithAstAsync(filename) {
  return transformSourceFileAsync(filename, {
    ast: true
  });
}

module.exports = {
  transformSourceFileAsync,
  transformFileWithVisitorAsync,
  transformFileWithSourceMapAsync,
  transformFileWithAstAsync
};
test/contract.js
const assert = require('assert');
const path = require('path');
const {
  transformSourceFileAsync,
  transformFileWithVisitorAsync,
  transformFileWithSourceMapAsync,
  transformFileWithAstAsync
} = require('../src/index');

const fixtureFile = path.resolve(__dirname, '../fixtures/input.js');
const syntaxErrorFile = path.resolve(__dirname, '../fixtures/syntax-error.js');
const nonexistentFile = path.resolve(__dirname, '../fixtures/does-not-exist.js');

async function runContract() {
  // 1. transformFileAsync asynchronously transforms JavaScript source file and returns a Promise resolving to an object with generated code string
  {
    const result = await transformSourceFileAsync(fixtureFile);
    assert(result !== null, 'Result should not be null');
    assert.strictEqual(typeof result.code, 'string', 'Result must contain code string');
    assert(result.code.includes('hello world'), 'Transformed code must contain file content');
  }

  // 2. transformFileAsync applies custom plugin visitors asynchronously to modify AST identifiers in source file
  {
    const result = await transformFileWithVisitorAsync(fixtureFile, {
      Identifier(pathNode) {
        if (pathNode.node.name === 'message') {
          pathNode.node.name = 'greeting';
        }
      }
    });
    assert(result !== null, 'Result should not be null');
    assert(result.code.includes('greeting'), 'Identifier must be renamed by visitor');
    assert(!result.code.includes('message'), 'Original identifier should be replaced');
  }

  // 3. transformFileAsync generates source maps when sourceMaps option is enabled
  {
    const result = await transformFileWithSourceMapAsync(fixtureFile);
    assert(result !== null, 'Result should not be null');
    assert(result.map !== null && typeof result.map === 'object', 'Source map should be generated');
    assert.strictEqual(result.map.version, 3, 'Source map version should be 3');
    assert(Array.isArray(result.map.sources), 'Sources should be an array');
    assert.strictEqual(typeof result.map.mappings, 'string', 'Mappings should be a string');
  }

  // 4. transformFileAsync returns AST File root node when ast option is set to true
  {
    const result = await transformFileWithAstAsync(fixtureFile);
    assert(result !== null, 'Result should not be null');
    assert(result.ast !== null && typeof result.ast === 'object', 'AST must be returned');
    assert.strictEqual(result.ast.type, 'File', 'Root AST node must be File');
    assert.strictEqual(result.ast.program.type, 'Program', 'AST must have Program node');
  }

  // 5. transformFileAsync returns null when filename matches ignore pattern
  {
    const result = await transformSourceFileAsync(fixtureFile, {
      ignore: ['**/fixtures/input.js']
    });
    assert.strictEqual(result, null, 'Ignored file transformation must return null');
  }

  // 6. transformFileAsync rejects with ENOENT error when attempting to transform nonexistent file path
  {
    await assert.rejects(
      async () => {
        await transformSourceFileAsync(nonexistentFile);
      },
      (err) => {
        return err.code === 'ENOENT';
      },
      'Nonexistent file must reject with ENOENT error'
    );
  }

  // 7. transformFileAsync rejects with SyntaxError containing BABEL_PARSE_ERROR code when source file contains invalid JavaScript syntax
  {
    await assert.rejects(
      async () => {
        await transformSourceFileAsync(syntaxErrorFile);
      },
      (err) => {
        return err instanceof SyntaxError && err.code === 'BABEL_PARSE_ERROR';
      },
      'Invalid syntax in file must reject with SyntaxError containing BABEL_PARSE_ERROR code'
    );
  }

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

runContract().catch((err) => {
  console.error('Contract failed:', err);
  process.exit(1);
});

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