@esbuild/netbsd-arm64 0.25.12

force=true

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/%40esbuild/netbsd-arm64@0.25.12
Kind: HOW

Use EXACTLY these public packages and versions:
  - pkg:npm/%40esbuild/netbsd-arm64@0.25.12

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:b9b21bdfeb9d0929c0cf464f99d425af246598236b539f66d4e19a1c6d7dc266","contract":["package manifest specifies @esbuild/netbsd-arm64 name, version 0.25.12, netbsd OS, and arm64 CPU requirements","resolves path to bin/esbuild executable within @esbuild/netbsd-arm64 distribution","validates bin/esbuild executable format as 64-bit ELF binary with standard magic bytes, EM_AARCH64 machine architecture, and non-empty payload"],"goal":"verify pkg:npm/%40esbuild/netbsd-arm64@0.25.12","kind":"HOW","packages":["pkg:npm/%40esbuild/netbsd-arm64@0.25.12"],"schemaVersion":1},"contractCommand":["node","test/contract.js"],"environment":{"arch":"x64","distro":"ubuntu","ecosystem":"npm","executionContext":"node","language":"javascript","libc":"glibc","libcVersion":"2.39","moduleSystem":"cjs","os":"linux","osVersionBucket":"24","packageManager":"npm","runtime":"node","runtimeVersion":"22.23.2","schemaVersion":1},"license":"MIT-0","packages":["pkg:npm/%40esbuild/netbsd-arm64@0.25.12"],"schemaVersion":1,"subject":"pkg:npm/%40esbuild/netbsd-arm64@0.25.12","verifierAdapter":"node-typescript@1"}

const fs = require('fs');
const path = require('path');

function getPackageManifest() {
  const manifestPath = require.resolve('@esbuild/netbsd-arm64/package.json');
  return JSON.parse(fs.readFileSync(manifestPath, 'utf8'));
}

function getBinaryPath() {
  const binaryPath = require.resolve('@esbuild/netbsd-arm64/bin/esbuild');
  if (!fs.existsSync(binaryPath)) {
    throw new Error(`esbuild binary not found at ${binaryPath}`);
  }
  return binaryPath;
}

function inspectBinaryHeader() {
  const binaryPath = getBinaryPath();
  const buffer = Buffer.alloc(20);
  const fd = fs.openSync(binaryPath, 'r');
  try {
    fs.readSync(fd, buffer, 0, 20, 0);
  } finally {
    fs.closeSync(fd);
  }

  const stat = fs.statSync(binaryPath);

  return {
    path: binaryPath,
    size: stat.size,
    isElf: buffer[0] === 0x7f && buffer[1] === 0x45 && buffer[2] === 0x4c && buffer[3] === 0x46,
    is64Bit: buffer[4] === 2,
    isLittleEndian: buffer[5] === 1,
    machine: buffer.readUInt16LE(18),
    isExecutable: (stat.mode & 0o111) !== 0,
  };
}

module.exports = {
  getPackageManifest,
  getBinaryPath,
  inspectBinaryHeader,
};

{
  "name": "sample-esbuild-netbsd-arm64",
  "version": "1.0.0",
  "lockfileVersion": 3,
  "requires": true,
  "packages": {
    "": {
      "name": "sample-esbuild-netbsd-arm64",
      "version": "1.0.0",
      "license": "MIT-0",
      "dependencies": {
        "@esbuild/netbsd-arm64": "0.25.12"
      }
    },
    "node_modules/@esbuild/netbsd-arm64": {
      "version": "0.25.12",
      "resolved": "https://registry.npmjs.org/@esbuild/netbsd-arm64/-/netbsd-arm64-0.25.12.tgz",
      "integrity": "sha512-xXwcTq4GhRM7J9A8Gv5boanHhRa/Q9KLVmcyXHCTaM4wKfIpWkdXiMog/KsnxzJ0A1+nD+zoecuzqPmCRyBGjg==",
      "cpu": [
        "arm64"
      ],
      "license": "MIT",
      "os": [
        "netbsd"
      ],
      "engines": {
        "node": ">=18"
      }
    }
  }
}

{
  "name": "sample-esbuild-netbsd-arm64",
  "version": "1.0.0",
  "description": "verify pkg:npm/@esbuild/netbsd-arm64@0.25.12",
  "main": "index.js",
  "license": "MIT-0",
  "dependencies": {
    "@esbuild/netbsd-arm64": "0.25.12"
  }
}

{
  "schemaVersion": 1,
  "goal": "verify pkg:npm/%40esbuild/netbsd-arm64@0.25.12",
  "kind": "HOW",
  "packages": [
    "pkg:npm/%40esbuild/netbsd-arm64@0.25.12"
  ]
}

const assert = require('assert');
const path = require('path');
const { getPackageManifest, getBinaryPath, inspectBinaryHeader } = require('../index.js');

// Contract 1: package manifest specifies @esbuild/netbsd-arm64 name, version 0.25.12, netbsd OS, and arm64 CPU requirements
{
  const manifest = getPackageManifest();
  assert.strictEqual(manifest.name, '@esbuild/netbsd-arm64', 'Package name must be @esbuild/netbsd-arm64');
  assert.strictEqual(manifest.version, '0.25.12', 'Package version must be 0.25.12');
  assert.deepStrictEqual(manifest.os, ['netbsd'], 'Target OS must be netbsd');
  assert.deepStrictEqual(manifest.cpu, ['arm64'], 'Target CPU must be arm64');
}

// Contract 2: resolves path to bin/esbuild executable within @esbuild/netbsd-arm64 distribution
{
  const binPath = getBinaryPath();
  assert.strictEqual(typeof binPath, 'string', 'Binary path must be a string');
  assert.strictEqual(path.basename(binPath), 'esbuild', 'Binary filename must be esbuild');
}

// Contract 3: validates bin/esbuild executable format as 64-bit ELF binary with standard magic bytes, EM_AARCH64 machine architecture, and non-empty payload
{
  const info = inspectBinaryHeader();
  assert.strictEqual(info.isElf, true, 'Binary must have standard ELF magic header');
  assert.strictEqual(info.is64Bit, true, 'Binary must be 64-bit ELF');
  assert.strictEqual(info.isLittleEndian, true, 'Binary must be little-endian');
  assert.strictEqual(info.machine, 183, 'Machine architecture must be EM_AARCH64 (183)');
  assert(info.size > 1000000, `Binary size must be substantial (actual: ${info.size})`);
}

console.log('All contracts passed successfully.');