chownr 2.0.0: 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 pkg:npm/chownr@2.0.0
Kind: HOW

Use EXACTLY these public packages and versions:
  - pkg:npm/chownr@2.0.0
Demonstrate these symbols/APIs:
  - chownr
  - chownr.sync

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:sha256:201d81d5e64444fff0b94e8f97159e544e68b6092e249b4077221cd88cf76580","contract":["chownr.sync(path, uid, gid) synchronously changes ownership of nested files and directories","chownr(path, uid, gid, callback) asynchronously changes ownership of nested files and directories","chownr.sync ignores ENOENT when path does not exist","chownr ignores ENOENT when path does not exist"],"goal":"verify pkg:npm/chownr@2.0.0","kind":"HOW","packages":["pkg:npm/chownr@2.0.0"],"schemaVersion":1,"symbols":["chownr","chownr.sync"]},"contractCommand":["node","test/contract.mjs"],"environment":{"arch":"x64","distro":"ubuntu","ecosystem":"npm","libc":"glibc","libcVersion":"2.39","os":"linux","osVersionBucket":"24","packageManager":"npm","schemaVersion":1},"license":"MIT-0","packages":["pkg:npm/chownr@2.0.0"],"schemaVersion":1,"subject":"pkg:npm/chownr@2.0.0","symbols":["chownr","chownr.sync"],"verifierAdapter":"node-typescript@1"}

import chownr from 'chownr';

/**
 * Asynchronously changes ownership of a path and all its contents recursively.
 * @param {string} targetPath - Path to change ownership for
 * @param {number} uid - User ID
 * @param {number} gid - Group ID
 * @returns {Promise<void>}
 */
export function changeOwnerTree(targetPath, uid, gid) {
  return new Promise((resolve, reject) => {
    chownr(targetPath, uid, gid, (err) => {
      if (err) reject(err);
      else resolve();
    });
  });
}

/**
 * Synchronously changes ownership of a path and all its contents recursively.
 * @param {string} targetPath - Path to change ownership for
 * @param {number} uid - User ID
 * @param {number} gid - Group ID
 */
export function changeOwnerTreeSync(targetPath, uid, gid) {
  chownr.sync(targetPath, uid, gid);
}

export { chownr };

{
  "name": "verify-chownr",
  "version": "1.0.0",
  "lockfileVersion": 3,
  "requires": true,
  "packages": {
    "": {
      "name": "verify-chownr",
      "version": "1.0.0",
      "dependencies": {
        "chownr": "2.0.0"
      }
    },
    "node_modules/chownr": {
      "version": "2.0.0",
      "resolved": "https://registry.npmjs.org/chownr/-/chownr-2.0.0.tgz",
      "integrity": "sha512-bIomtDF5KGpdogkLd9VspvFzk9KfpyyGlS8YFVZl7TGPBHL5snIOnxeshwVgPteQ9b4Eydl+pVbIyE1DcvCWgQ==",
      "license": "ISC",
      "engines": {
        "node": ">=10"
      }
    }
  }
}

{
  "name": "verify-chownr",
  "version": "1.0.0",
  "description": "Clean-room verification sample for chownr 2.0.0",
  "type": "module",
  "main": "index.mjs",
  "scripts": {
    "test": "node test/contract.mjs"
  },
  "dependencies": {
    "chownr": "2.0.0"
  }
}

{
  "schemaVersion": 1,
  "goal": "verify pkg:npm/chownr@2.0.0",
  "kind": "HOW",
  "packages": [
    "pkg:npm/chownr@2.0.0"
  ],
  "symbols": [
    "chownr",
    "chownr.sync"
  ]
}

import assert from 'node:assert/strict';
import fs from 'node:fs';
import path from 'node:path';
import os from 'node:os';
import chownr from 'chownr';

const uid = process.getuid ? process.getuid() : 1000;
const gid = process.getgid ? process.getgid() : 1000;

const tmpRoot = fs.mkdtempSync(path.join(os.tmpdir(), 'csx-chownr-test-'));

try {
  // Test 1: chownr.sync on a nested directory tree
  const syncDir = path.join(tmpRoot, 'sync-tree');
  fs.mkdirSync(path.join(syncDir, 'nested', 'deep'), { recursive: true });
  fs.writeFileSync(path.join(syncDir, 'file1.txt'), 'hello');
  fs.writeFileSync(path.join(syncDir, 'nested', 'file2.txt'), 'world');
  fs.writeFileSync(path.join(syncDir, 'nested', 'deep', 'file3.txt'), 'deep');

  chownr.sync(syncDir, uid, gid);

  const statSyncDir = fs.statSync(syncDir);
  const statSyncFile1 = fs.statSync(path.join(syncDir, 'file1.txt'));
  const statSyncFile2 = fs.statSync(path.join(syncDir, 'nested', 'file2.txt'));
  const statSyncFile3 = fs.statSync(path.join(syncDir, 'nested', 'deep', 'file3.txt'));

  assert.equal(statSyncDir.uid, uid);
  assert.equal(statSyncDir.gid, gid);
  assert.equal(statSyncFile1.uid, uid);
  assert.equal(statSyncFile1.gid, gid);
  assert.equal(statSyncFile2.uid, uid);
  assert.equal(statSyncFile2.gid, gid);
  assert.equal(statSyncFile3.uid, uid);
  assert.equal(statSyncFile3.gid, gid);

  // Test 2: chownr (async) on a nested directory tree
  const asyncDir = path.join(tmpRoot, 'async-tree');
  fs.mkdirSync(path.join(asyncDir, 'sub'), { recursive: true });
  fs.writeFileSync(path.join(asyncDir, 'async-file.txt'), 'async');
  fs.writeFileSync(path.join(asyncDir, 'sub', 'nested.txt'), 'nested');

  await new Promise((resolve, reject) => {
    chownr(asyncDir, uid, gid, (err) => {
      if (err) reject(err);
      else resolve();
    });
  });

  const statAsyncDir = fs.statSync(asyncDir);
  const statAsyncFile1 = fs.statSync(path.join(asyncDir, 'async-file.txt'));
  const statAsyncFile2 = fs.statSync(path.join(asyncDir, 'sub', 'nested.txt'));

  assert.equal(statAsyncDir.uid, uid);
  assert.equal(statAsyncDir.gid, gid);
  assert.equal(statAsyncFile1.uid, uid);
  assert.equal(statAsyncFile1.gid, gid);
  assert.equal(statAsyncFile2.uid, uid);
  assert.equal(statAsyncFile2.gid, gid);

  // Test 3: non-existent path handling (ENOENT is ignored / no error)
  const nonExistent = path.join(tmpRoot, 'does-not-exist');
  assert.doesNotThrow(() => {
    chownr.sync(nonExistent, uid, gid);
  });

  await new Promise((resolve, reject) => {
    chownr(nonExistent, uid, gid, (err) => {
      if (err) reject(err);
      else resolve();
    });
  });

  console.log('All chownr contract tests passed.');
} finally {
  fs.rmSync(tmpRoot, { recursive: true, force: true });
}