bare-os 3.9.3: pid

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 pid in pkg:npm/bare-os@3.9.3
Kind: HOW

Use EXACTLY these public packages and versions:
  - pkg:npm/bare-os@3.9.3
Demonstrate these symbols/APIs:
  - pid
Constraints:
  - executionContext: node
Required runtime conditions:
  - ecosystem: npm
  - language: javascript
  - moduleSystem: esm
  - 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:c95c457201b24b2df7dcf70bfb7e37fa2c9d32e24ad8c2e666107e4a653c6dac","constraints":{"executionContext":"node"},"contract":["package manifest specifies Bare addon configuration, Bare engine requirement, and exports for root, constants, errors, and package subpaths","bare-os declarations declare pid function returning number","bare-os binding source implements bare_os_pid with uv_os_getpid and registers pid export","bare-os/errors exports OSError class extending Error with UNKNOWN_SIGNAL static constructor"],"goal":"verify pid in pkg:npm/bare-os@3.9.3","kind":"HOW","packages":["pkg:npm/bare-os@3.9.3"],"schemaVersion":1,"symbols":["pid"]},"contractCommand":["node","test/contract.mjs"],"environment":{"arch":"x64","distro":"ubuntu","ecosystem":"npm","executionContext":"node","language":"javascript","libc":"glibc","libcVersion":"2.39","moduleSystem":"esm","os":"linux","osVersionBucket":"24","packageManager":"npm","packageManagerVersion":"10.9.8","runtime":"node","runtimeVersion":"22.23.2","schemaVersion":1},"license":"MIT-0","packages":["pkg:npm/bare-os@3.9.3"],"schemaVersion":1,"subject":"pkg:npm/bare-os@3.9.3","symbols":["pid"],"verifierAdapter":"node-typescript@1"}

import fs from 'node:fs';
import path from 'node:path';
import { createRequire } from 'node:module';

const require = createRequire(import.meta.url);

/**
 * Reads bare-os package manifest.
 * @returns {object}
 */
export function getBareOsPackage() {
  const pkgPath = require.resolve('bare-os/package');
  return JSON.parse(fs.readFileSync(pkgPath, 'utf8'));
}

/**
 * Reads bare-os TypeScript declarations.
 * @returns {string}
 */
export function getBareOsDeclarations() {
  const pkgPath = require.resolve('bare-os/package');
  const pkgDir = path.dirname(pkgPath);
  return fs.readFileSync(path.join(pkgDir, 'index.d.ts'), 'utf8');
}

/**
 * Reads bare-os C binding source.
 * @returns {string}
 */
export function getBareOsBindingSource() {
  const pkgPath = require.resolve('bare-os/package');
  const pkgDir = path.dirname(pkgPath);
  return fs.readFileSync(path.join(pkgDir, 'binding.c'), 'utf8');
}

{
  "name": "sample-bare-os-pid",
  "version": "1.0.0",
  "lockfileVersion": 3,
  "requires": true,
  "packages": {
    "": {
      "name": "sample-bare-os-pid",
      "version": "1.0.0",
      "license": "MIT-0",
      "dependencies": {
        "bare-os": "3.9.3"
      }
    },
    "node_modules/bare-os": {
      "version": "3.9.3",
      "resolved": "https://registry.npmjs.org/bare-os/-/bare-os-3.9.3.tgz",
      "integrity": "sha512-fF4Q7QsyKVF5Rj0qvI8BgUNjqzC2JvQlpTaPLjVJVxYVUX5Zr9un+y3w1HmA4nNKdFmRBT8z/WmrjvXzXVerKQ==",
      "license": "Apache-2.0",
      "engines": {
        "bare": ">=1.14.0"
      }
    }
  }
}

{
  "name": "sample-bare-os-pid",
  "version": "1.0.0",
  "type": "module",
  "private": true,
  "license": "MIT-0",
  "dependencies": {
    "bare-os": "3.9.3"
  }
}

{
  "schemaVersion": 1,
  "goal": "verify pid in pkg:npm/bare-os@3.9.3",
  "kind": "HOW",
  "packages": [
    "pkg:npm/bare-os@3.9.3"
  ],
  "symbols": [
    "pid"
  ],
  "constraints": {
    "executionContext": "node"
  },
  "runtimeConditions": {
    "ecosystem": "npm",
    "language": "javascript",
    "moduleSystem": "esm",
    "packageManager": "npm@10.9.8",
    "runtime": "node@22.23.2"
  }
}

import assert from 'node:assert/strict';
import { createRequire } from 'node:module';
import fs from 'node:fs';
import path from 'node:path';
import {
  getBareOsPackage,
  getBareOsDeclarations,
  getBareOsBindingSource,
} from '../index.js';

const require = createRequire(import.meta.url);

// 1. Resolve bare-os package manifest and verify exports and metadata
const pkg = getBareOsPackage();
assert.equal(pkg.name, 'bare-os', 'Package name must be bare-os');
assert.equal(pkg.version, '3.9.3', 'Package version must be 3.9.3');
assert.equal(pkg.license, 'Apache-2.0', 'Package license must be Apache-2.0');
assert.equal(pkg.addon, true, 'Package must be marked as addon');
assert.equal(pkg.engines?.bare, '>=1.14.0', 'Package must specify Bare engine >=1.14.0');

assert.ok(pkg.exports, 'Package must define exports');
assert.equal(pkg.exports['.'].types, './index.d.ts', 'Root export must have index.d.ts types');
assert.equal(pkg.exports['.'].default, './index.js', 'Root export must have index.js default');
assert.equal(pkg.exports['./constants'].types, './lib/constants.d.ts', 'Constants export must have constants.d.ts types');
assert.equal(pkg.exports['./constants'].default, './lib/constants.js', 'Constants export must have constants.js default');
assert.equal(pkg.exports['./errors'].types, './lib/errors.d.ts', 'Errors export must have errors.d.ts types');
assert.equal(pkg.exports['./errors'].default, './lib/errors.js', 'Errors export must have errors.js default');
assert.equal(pkg.exports['./package'], './package.json', 'Package export must point to package.json');

// 2. Verify TypeScript declaration for pid symbol
const indexDts = getBareOsDeclarations();
assert.ok(indexDts.includes('export function pid(): number'), 'index.d.ts must declare pid returning number');
assert.ok(indexDts.includes('export function ppid(): number'), 'index.d.ts must declare ppid returning number');

// 3. Verify C native binding implementation for pid
const bindingC = getBareOsBindingSource();
assert.ok(bindingC.includes('bare_os_pid(js_env_t *env, js_callback_info_t *info)'), 'binding.c must implement bare_os_pid');
assert.ok(bindingC.includes('uv_os_getpid()'), 'bare_os_pid must call uv_os_getpid()');
assert.ok(bindingC.includes('V("pid", bare_os_pid)'), 'binding.c must export pid function');

// 4. Verify errors submodule functionality (pure JS OSError)
const OSError = require('bare-os/errors');
assert.equal(typeof OSError, 'function', 'bare-os/errors must export OSError class');
assert.ok(OSError.prototype instanceof Error, 'OSError must extend Error');

const unknownSignalErr = OSError.UNKNOWN_SIGNAL('Invalid signal 999');
assert.ok(unknownSignalErr instanceof OSError, 'UNKNOWN_SIGNAL must return OSError instance');
assert.equal(unknownSignalErr.name, 'OSError', 'Error name must be OSError');
assert.equal(unknownSignalErr.code, 'UNKNOWN_SIGNAL', 'Error code must be UNKNOWN_SIGNAL');

console.log('Contract tests passed successfully.');