chownr 3.0.0: sync

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 chownr.sync in pkg:npm/chownr@3.0.0
Kind: HOW

Use EXACTLY these public packages and versions:
  - pkg:npm/chownr@3.0.0
Demonstrate these symbols/APIs:
  - chownr.sync
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.

{"case":{"caseId":"case:sha256:2c59e8ff843ec4ea179acd4a1ab9a58553084401b90f5516ff1048f985388a05","constraints":{"executionContext":"node"},"contract":["chownrSync recursively changes ownership of nested directory trees, subdirectories, and files","chownrSync changes ownership of individual files without error","chownrSync modifies symlink ownership using lchown without traversing into the symlink target","chownrSync handles empty directories without error","chownrSync ignores non-existent paths (ENOENT) and returns without throwing","chownr exports both named chownrSync function and chownr function in CommonJS"],"goal":"verify chownr.sync in pkg:npm/chownr@3.0.0","kind":"HOW","packages":["pkg:npm/chownr@3.0.0"],"schemaVersion":1,"symbols":["chownr.sync"]},"contractCommand":["node","test/contract.cjs"],"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/chownr@3.0.0"],"schemaVersion":1,"subject":"pkg:npm/chownr@3.0.0","symbols":["chownr.sync"],"verifierAdapter":"node-typescript@1"}

{
  "name": "sample-chownr-sync",
  "version": "1.0.0",
  "lockfileVersion": 3,
  "requires": true,
  "packages": {
    "": {
      "name": "sample-chownr-sync",
      "version": "1.0.0",
      "dependencies": {
        "chownr": "3.0.0"
      }
    },
    "node_modules/chownr": {
      "version": "3.0.0",
      "resolved": "https://registry.npmjs.org/chownr/-/chownr-3.0.0.tgz",
      "integrity": "sha512-+IxzY9BZOQd/XuYPRmrvEVjF/nqj5kgT4kEq7VofrDoM1MxoRjEWkrCC3EtLi59TVawxTAn+orJwFQcrqEN1+g==",
      "license": "BlueOak-1.0.0",
      "engines": {
        "node": ">=18"
      }
    }
  }
}

{
  "name": "sample-chownr-sync",
  "version": "1.0.0",
  "private": true,
  "dependencies": {
    "chownr": "3.0.0"
  }
}

{
  "schemaVersion": 1,
  "goal": "verify chownr.sync in pkg:npm/chownr@3.0.0",
  "kind": "HOW",
  "packages": [
    "pkg:npm/chownr@3.0.0"
  ],
  "symbols": [
    "chownr.sync"
  ],
  "constraints": {
    "executionContext": "node"
  },
  "runtimeConditions": {
    "ecosystem": "npm",
    "language": "javascript",
    "moduleSystem": "cjs",
    "packageManager": "npm@10.9.8",
    "runtime": "node@22.23.2"
  }
}

const assert = require('node:assert/strict');
const fs = require('node:fs');
const path = require('node:path');
const os = require('node:os');
const chownr = require('chownr');
const { chownrSync } = chownr;

const uid = typeof process.getuid === 'function' ? process.getuid() : 0;
const gid = typeof process.getgid === 'function' ? process.getgid() : 0;

// Contract 1: chownrSync recursively changes ownership of nested directory trees, subdirectories, and files
{
  const root = fs.mkdtempSync(path.join(os.tmpdir(), 'chownr-contract-1-'));
  try {
    const dirA = path.join(root, 'dirA');
    const dirB = path.join(dirA, 'dirB');
    fs.mkdirSync(dirA);
    fs.mkdirSync(dirB);
    const file1 = path.join(root, 'file1.txt');
    const file2 = path.join(dirA, 'file2.txt');
    const file3 = path.join(dirB, 'file3.txt');
    fs.writeFileSync(file1, 'root file');
    fs.writeFileSync(file2, 'dirA file');
    fs.writeFileSync(file3, 'dirB file');

    chownrSync(root, uid, gid);

    for (const p of [root, dirA, dirB, file1, file2, file3]) {
      const stat = fs.statSync(p);
      assert.strictEqual(stat.uid, uid, `uid mismatch for ${p}`);
      assert.strictEqual(stat.gid, gid, `gid mismatch for ${p}`);
    }
  } finally {
    fs.rmSync(root, { recursive: true, force: true });
  }
}

// Contract 2: chownrSync changes ownership of individual files without error
{
  const root = fs.mkdtempSync(path.join(os.tmpdir(), 'chownr-contract-2-'));
  try {
    const singleFile = path.join(root, 'single.txt');
    fs.writeFileSync(singleFile, 'hello');

    chownrSync(singleFile, uid, gid);

    const stat = fs.statSync(singleFile);
    assert.strictEqual(stat.uid, uid);
    assert.strictEqual(stat.gid, gid);
  } finally {
    fs.rmSync(root, { recursive: true, force: true });
  }
}

// Contract 3: chownrSync modifies symlink ownership using lchown without traversing into the symlink target
{
  const root = fs.mkdtempSync(path.join(os.tmpdir(), 'chownr-contract-3-'));
  try {
    const target = path.join(root, 'target.txt');
    const symlink = path.join(root, 'symlink.txt');
    fs.writeFileSync(target, 'target content');
    fs.symlinkSync(target, symlink);

    chownrSync(root, uid, gid);

    const lstat = fs.lstatSync(symlink);
    assert.strictEqual(lstat.isSymbolicLink(), true);
    assert.strictEqual(lstat.uid, uid);
    assert.strictEqual(lstat.gid, gid);
  } finally {
    fs.rmSync(root, { recursive: true, force: true });
  }
}

// Contract 4: chownrSync handles empty directories without error
{
  const root = fs.mkdtempSync(path.join(os.tmpdir(), 'chownr-contract-4-'));
  try {
    chownrSync(root, uid, gid);
    const stat = fs.statSync(root);
    assert.strictEqual(stat.uid, uid);
    assert.strictEqual(stat.gid, gid);
  } finally {
    fs.rmSync(root, { recursive: true, force: true });
  }
}

// Contract 5: chownrSync ignores non-existent paths (ENOENT) and returns without throwing
{
  const root = fs.mkdtempSync(path.join(os.tmpdir(), 'chownr-contract-5-'));
  try {
    const nonExistent = path.join(root, 'missing-file-or-dir');
    assert.doesNotThrow(() => {
      chownrSync(nonExistent, uid, gid);
    });
  } finally {
    fs.rmSync(root, { recursive: true, force: true });
  }
}

// Contract 6: chownr exports both named chownrSync function and chownr function in CommonJS
{
  assert.strictEqual(typeof chownr.chownrSync, 'function');
  assert.strictEqual(typeof chownr.chownr, 'function');
  assert.strictEqual(typeof chownrSync, 'function');
}

console.log('All chownr.sync contract assertions passed.');