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@babel/core 7.26.0: transformFileSync

검증된 샘플 — npm @babel/core 7.26.0: transformFileSync. node 22 · linux debian/x64 · docker에서 contract를 실행해 통과했습니다: babel exports file transformation functions…

sha256:0728455888cf85c63ede4803554b0ff7bf71d0fff08bee97ada89e7db03c83c7

이 네트워크가 제공하는 것은 하나입니다. 빌드되는 샘플. 샌드박스에서 돌리고 서명된 영수증을 보관합니다. 등급을 매기지 않고 무엇도 보증하지 않습니다 — 같은 코드가 당신 환경에서 빌드되는지는 측정한 적이 없습니다. 통과한 계약 영수증을 낸 서로 다른 서명 키의 수입니다. 하나면 작성자 혼자이고, 둘 이상이면 다른 사람도 빌드했다는 뜻입니다. 키는 스스로 만드는 것이고 뒤에 등록된 신원이 없으므로, 세는 것은 사람이 아니라 키입니다. MIT-0

실행 증거

선언된 환경과 서명된 실행을 분리해 두었습니다. 이 샘플이 무엇을 어디서 실행했는지 그대로 볼 수 있습니다.

증거 기준
서명된 컨트랙트 통과
검증 영수증
1
빌드한 서명 키
1
선언된 환경 node 22.23 linux 24 · ubuntu · glibc 2.39 x64 node 22.23 javascript npm 10

검증 실행 환경

환경 컨트랙트 단계 실행일
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

케이스

HOW
목표
verify pkg:npm/%40babel/core@7.26.0
패키지
심벌
  • transformFileSync
환경
node 22.23.2
생성일
2026-09-03T10:13:55Z

컨트랙트

  1. babel exports file transformation functions transformFileSync transformFileAsync and transformFile
  2. transformFileSync synchronously transforms JavaScript source file and returns code string
  3. transformFileSync applies custom AST visitor plugins synchronously to modify AST identifiers in target file
  4. transformFileSync generates source maps referencing input file when sourceMaps option is enabled
  5. transformFileSync returns AST file node when ast option is set to true
  6. transformFileSync minifies code when minified option is set to true
  7. transformFileSync throws an error with ENOENT code when target file does not exist
  8. transformFileSync throws a SyntaxError with BABEL_PARSE_ERROR code when reading a file with invalid JavaScript syntax
  9. transformFileAsync asynchronously transforms JavaScript source file returning a promise resolving to result object
  10. transformFile transforms JavaScript source file using error-first callback convention

파일

  • PROMPT.md
  • csx.json
  • package-lock.json
  • package.json
  • spec.json
  • test/contract.mjs

소스 아티팩트 내려받기 (tar.gz)

소스

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 pkg:npm/%40babel/core@7.26.0
Kind: HOW

Use EXACTLY these public packages and versions:
  - pkg:npm/%40babel/core@7.26.0
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:sha256:82c93352b641782cbea12a8c00cf4350b4725002324b3eef63849d97a62be133","constraints":{"executionContext":"node"},"contract":["babel exports file transformation functions transformFileSync transformFileAsync and transformFile","transformFileSync synchronously transforms JavaScript source file and returns code string","transformFileSync applies custom AST visitor plugins synchronously to modify AST identifiers in target file","transformFileSync generates source maps referencing input file when sourceMaps option is enabled","transformFileSync returns AST file node when ast option is set to true","transformFileSync minifies code when minified option is set to true","transformFileSync throws an error with ENOENT code when target file does not exist","transformFileSync throws a SyntaxError with BABEL_PARSE_ERROR code when reading a file with invalid JavaScript syntax","transformFileAsync asynchronously transforms JavaScript source file returning a promise resolving to result object","transformFile transforms JavaScript source file using error-first callback convention"],"goal":"verify pkg:npm/%40babel/core@7.26.0","kind":"HOW","packages":["pkg:npm/%40babel/core@7.26.0"],"schemaVersion":1,"symbols":["transformFileSync"]},"contractCommand":["node","test/contract.mjs"],"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@7.26.0"],"schemaVersion":1,"subject":"pkg:npm/%40babel/core@7.26.0","symbols":["transformFileSync"],"verifierAdapter":"node-typescript@1"}
package-lock.json
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  "name": "sample-babel-core",
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        "supports-color": {
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          "url": "https://tidelift.com/funding/github/npm/browserslist"
        },
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          "type": "github",
          "url": "https://github.com/sponsors/ai"
        }
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      "dependencies": {
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        "picocolors": "^1.1.1"
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}
package.json
{
  "name": "sample-babel-core",
  "version": "1.0.0",
  "type": "module",
  "license": "MIT-0",
  "dependencies": {
    "@babel/core": "7.26.0"
  }
}
spec.json
{
  "schemaVersion": 1,
  "goal": "verify pkg:npm/%40babel/core@7.26.0",
  "kind": "HOW",
  "packages": [
    "pkg:npm/%40babel/core@7.26.0"
  ],
  "constraints": {
    "executionContext": "node"
  },
  "runtimeConditions": {
    "ecosystem": "npm",
    "language": "javascript",
    "moduleSystem": "cjs",
    "packageManager": "npm@10.9.8",
    "runtime": "node@22.23.2"
  }
}
test/contract.mjs
import assert from 'node:assert/strict';
import fs from 'node:fs';
import path from 'node:path';
import os from 'node:os';
import * as babel from '@babel/core';

// 1. Export verification
assert.equal(typeof babel.transformFileSync, 'function', 'babel.transformFileSync must be a function');
assert.equal(typeof babel.transformFileAsync, 'function', 'babel.transformFileAsync must be a function');
assert.equal(typeof babel.transformFile, 'function', 'babel.transformFile must be a function');

const tempDir = fs.mkdtempSync(path.join(os.tmpdir(), 'babel-contract-'));
const validFile = path.join(tempDir, 'fixture.js');
const invalidFile = path.join(tempDir, 'invalid.js');

try {
  fs.writeFileSync(validFile, 'const OLD_NAME = 42;\nexport default OLD_NAME;\n');
  fs.writeFileSync(invalidFile, 'const 123broken = ;\n');

  // 2. transformFileSync synchronously transforms JavaScript source file and returns code string
  const syncResult = babel.transformFileSync(validFile, {
    configFile: false,
    babelrc: false
  });
  assert.ok(syncResult, 'transformFileSync must return result object');
  assert.equal(typeof syncResult.code, 'string', 'transformFileSync result must contain code string');
  assert.ok(syncResult.code.includes('const OLD_NAME = 42;'), 'transformFileSync should contain source code semantics');

  // 3. transformFileSync applies custom AST visitor plugins synchronously to modify AST identifiers in target file
  const customPlugin = {
    visitor: {
      Identifier(path) {
        if (path.node.name === 'OLD_NAME') {
          path.node.name = 'NEW_NAME';
        }
      }
    }
  };
  const pluginResult = babel.transformFileSync(validFile, {
    plugins: [() => customPlugin],
    configFile: false,
    babelrc: false
  });
  assert.ok(pluginResult, 'plugin transformation must return result');
  assert.ok(pluginResult.code.includes('NEW_NAME'), 'transformed code should contain renamed identifier');
  assert.ok(!pluginResult.code.includes('OLD_NAME'), 'transformed code should not contain old identifier');

  // 4. transformFileSync generates source maps referencing input file when sourceMaps option is enabled
  const mapResult = babel.transformFileSync(validFile, {
    configFile: false,
    babelrc: false,
    sourceMaps: true
  });
  assert.ok(mapResult.map, 'transformFileSync should generate sourcemap when sourceMaps: true');
  assert.ok(mapResult.map.sources.length > 0, 'sourcemap sources should not be empty');
  assert.ok(mapResult.map.sources.some(s => s.includes('fixture.js')), 'sourcemap sources should reference input file');

  // 5. transformFileSync returns AST file node when ast option is set to true
  const astResult = babel.transformFileSync(validFile, {
    configFile: false,
    babelrc: false,
    ast: true
  });
  assert.ok(astResult.ast, 'transformFileSync should return AST when ast: true');
  assert.equal(astResult.ast.type, 'File', 'root node of returned AST must be File');
  assert.equal(astResult.ast.program.type, 'Program', 'AST must have a Program node');

  // 6. transformFileSync minifies code when minified option is set to true
  const minResult = babel.transformFileSync(validFile, {
    configFile: false,
    babelrc: false,
    minified: true
  });
  assert.ok(minResult.code.length < syncResult.code.length, 'minified code should be shorter than unminified code');
  assert.ok(!minResult.code.includes('\n') || minResult.code.length < 50, 'minified code should strip formatting');

  // 7. transformFileSync throws an error with ENOENT code when target file does not exist
  let enoentErr = null;
  try {
    babel.transformFileSync(path.join(tempDir, 'does-not-exist.js'), {
      configFile: false,
      babelrc: false
    });
  } catch (err) {
    enoentErr = err;
  }
  assert.ok(enoentErr, 'transformFileSync must throw when target file does not exist');
  assert.equal(enoentErr.code, 'ENOENT', 'error code must be ENOENT');

  // 8. transformFileSync throws a SyntaxError with BABEL_PARSE_ERROR code when reading a file with invalid JavaScript syntax
  let parseErr = null;
  try {
    babel.transformFileSync(invalidFile, {
      configFile: false,
      babelrc: false
    });
  } catch (err) {
    parseErr = err;
  }
  assert.ok(parseErr, 'transformFileSync must throw when file has invalid syntax');
  assert.equal(parseErr.code, 'BABEL_PARSE_ERROR', 'error code must be BABEL_PARSE_ERROR');

  // 9. transformFileAsync asynchronously transforms JavaScript source file returning a promise resolving to result object
  const asyncResult = await babel.transformFileAsync(validFile, {
    configFile: false,
    babelrc: false
  });
  assert.ok(asyncResult, 'transformFileAsync must resolve to result object');
  assert.equal(typeof asyncResult.code, 'string', 'transformFileAsync result must contain code string');
  assert.ok(asyncResult.code.includes('const OLD_NAME = 42;'), 'async result should preserve code semantics');

  // 10. transformFile transforms JavaScript source file using error-first callback convention
  const cbResult = await new Promise((resolve, reject) => {
    babel.transformFile(validFile, { configFile: false, babelrc: false }, (err, res) => {
      if (err) reject(err);
      else resolve(res);
    });
  });
  assert.ok(cbResult, 'transformFile callback must receive result object');
  assert.equal(typeof cbResult.code, 'string', 'callback result must contain code string');
  assert.ok(cbResult.code.includes('const OLD_NAME = 42;'), 'callback result should preserve code semantics');

  console.log('Contract tests passed successfully.');
} finally {
  fs.rmSync(tempDir, { recursive: true, force: true });
}

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