chownr 3.0.0: chownr

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.chownr 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.chownr

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:sha256:042e4a990b33e89bfefbe301e253b498789a9bcd9a4fed3a22c962c9558e18bd","contract":["chownr.chownr recursively changes ownership of nested directory trees, subdirectories, and files","chownr.chownr changes ownership of individual files without error","chownr.chownr modifies symlink ownership using lchown without traversing into the symlink target","chownr.chownr handles empty directories without error","chownr.chownr ignores non-existent paths (ENOENT) and calls back without error","chownr.chownr is exported as a callable function in both ECMAScript module and CommonJS module namespaces"],"goal":"verify chownr.chownr in pkg:npm/chownr@3.0.0","kind":"HOW","packages":["pkg:npm/chownr@3.0.0"],"schemaVersion":1,"symbols":["chownr.chownr"]},"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@3.0.0"],"schemaVersion":1,"subject":"pkg:npm/chownr@3.0.0","symbols":["chownr.chownr"],"verifierAdapter":"node-typescript@1"}

import * as chownr from 'chownr';

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

export { chownr };

{
  "name": "sample-chownr-chownr",
  "version": "1.0.0",
  "lockfileVersion": 3,
  "requires": true,
  "packages": {
    "": {
      "name": "sample-chownr-chownr",
      "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-chownr",
  "version": "1.0.0",
  "type": "module",
  "private": true,
  "scripts": {
    "test": "node test/contract.mjs"
  },
  "dependencies": {
    "chownr": "3.0.0"
  }
}

{
  "schemaVersion": 1,
  "goal": "verify chownr.chownr in pkg:npm/chownr@3.0.0",
  "kind": "HOW",
  "packages": [
    "pkg:npm/chownr@3.0.0"
  ],
  "symbols": [
    "chownr.chownr"
  ]
}

import assert from 'node:assert/strict';
import fs from 'node:fs';
import path from 'node:path';
import os from 'node:os';
import { createRequire } from 'node:module';
import * as chownr from 'chownr';

const require = createRequire(import.meta.url);
const uid = typeof process.getuid === 'function' ? process.getuid() : 0;
const gid = typeof process.getgid === 'function' ? process.getgid() : 0;

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

try {
  // Contract 1: chownr.chownr recursively changes ownership of nested directory trees, subdirectories, and files
  {
    const dir = path.join(tmpRoot, 'tree');
    const subDir = path.join(dir, 'sub');
    const nestedDir = path.join(subDir, 'nested');
    fs.mkdirSync(nestedDir, { recursive: true });

    const fileRoot = path.join(dir, 'root.txt');
    const fileSub = path.join(subDir, 'sub.txt');
    const fileNested = path.join(nestedDir, 'leaf.txt');

    fs.writeFileSync(fileRoot, 'root content');
    fs.writeFileSync(fileSub, 'sub content');
    fs.writeFileSync(fileNested, 'leaf content');

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

    for (const p of [dir, subDir, nestedDir, fileRoot, fileSub, fileNested]) {
      const stat = fs.statSync(p);
      assert.strictEqual(stat.uid, uid, `uid mismatch for ${p}`);
      assert.strictEqual(stat.gid, gid, `gid mismatch for ${p}`);
    }
  }

  // Contract 2: chownr.chownr changes ownership of individual files without error
  {
    const singleFile = path.join(tmpRoot, 'single.txt');
    fs.writeFileSync(singleFile, 'single file content');

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

    const stat = fs.statSync(singleFile);
    assert.strictEqual(stat.uid, uid);
    assert.strictEqual(stat.gid, gid);
  }

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

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

    const lstat = fs.lstatSync(symlink);
    assert.strictEqual(lstat.isSymbolicLink(), true);
    assert.strictEqual(lstat.uid, uid);
    assert.strictEqual(lstat.gid, gid);
  }

  // Contract 4: chownr.chownr handles empty directories without error
  {
    const emptyDir = path.join(tmpRoot, 'empty-dir');
    fs.mkdirSync(emptyDir);

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

    const stat = fs.statSync(emptyDir);
    assert.strictEqual(stat.uid, uid);
    assert.strictEqual(stat.gid, gid);
  }

  // Contract 5: chownr.chownr ignores non-existent paths (ENOENT) and calls back without error
  {
    const nonExistent = path.join(tmpRoot, 'non-existent-path');
    await new Promise((resolve, reject) => {
      chownr.chownr(nonExistent, uid, gid, (err) => {
        if (err) reject(err);
        else resolve();
      });
    });
  }

  // Contract 6: chownr.chownr is exported as a callable function in both ECMAScript module and CommonJS module namespaces
  {
    assert.strictEqual(typeof chownr.chownr, 'function');
    const cjsChownr = require('chownr');
    assert.strictEqual(typeof cjsChownr.chownr, 'function');
  }

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