示例

@babel/core 7.26.0: transformFileSync

已验证示例 — npm @babel/core 7.26.0: transformFileSync. contract 在 node 22 · linux debian/x64 · docker 上运行并通过： babel exports file transformation functions…

sha256:0728455888cf85c63ede4803554b0ff7bf71d0fff08bee97ada89e7db03c83c7

MIT-0

执行证据

声明的环境与签名的运行分开呈现，你可以看到这个样本究竟运行了什么、在哪里运行。

证据依据: 签名契约通过
验证回执: 1
构建过它的签名密钥: 1

声明的环境 node 22.23 linux 24 · ubuntu · glibc 2.39 x64 node 22.23 javascript npm 10

验证运行环境

环境	契约	阶段	运行日期
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

案例

HOW

目标: verify pkg:npm/%40babel/core@7.26.0
包: @babel/core 7.26.0
符号: transformFileSync
环境: node 22.23.2
创建时间: 2026-09-03T10:13:55Z

契约

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

文件

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

下载源代码构件 (tar.gz)

源代码

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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      "license": "MIT",
      "engines": {
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      }
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      "license": "MIT",
      "bin": {
        "jsesc": "bin/jsesc"
      },
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      "license": "MIT",
      "bin": {
        "json5": "lib/cli.js"
      },
      "engines": {
        "node": ">=6"
      }
    },
    "node_modules/lru-cache": {
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      "license": "ISC",
      "dependencies": {
        "yallist": "^3.0.2"
      }
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      "resolved": "https://registry.npmjs.org/semver/-/semver-6.3.1.tgz",
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      "license": "ISC",
      "bin": {
        "semver": "bin/semver.js"
      }
    },
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      "funding": [
        {
          "type": "opencollective",
          "url": "https://opencollective.com/browserslist"
        },
        {
          "type": "tidelift",
          "url": "https://tidelift.com/funding/github/npm/browserslist"
        },
        {
          "type": "github",
          "url": "https://github.com/sponsors/ai"
        }
      ],
      "license": "MIT",
      "dependencies": {
        "escalade": "^3.2.0",
        "picocolors": "^1.1.1"
      },
      "bin": {
        "update-browserslist-db": "cli.js"
      },
      "peerDependencies": {
        "browserslist": ">= 4.21.0"
      }
    },
    "node_modules/yallist": {
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      "resolved": "https://registry.npmjs.org/yallist/-/yallist-3.1.1.tgz",
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      "license": "ISC"
    }
  }
}

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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