@napi-rs/lzma-linux-x64-gnu 1.5.1: lzma

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 @napi-rs/lzma-linux-x64-gnu.lzma in pkg:npm/%40napi-rs/lzma-linux-x64-gnu@1.5.1
Kind: HOW

Use EXACTLY these public packages and versions:
  - pkg:npm/%40napi-rs/lzma-linux-x64-gnu@1.5.1
Demonstrate these symbols/APIs:
  - @napi-rs/lzma-linux-x64-gnu.lzma
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:sha256:4117c2f6c91fce928afd4be22fa5e2705d778e18dcdec387284a463ed3030fc4","constraints":{"executionContext":"node"},"contract":["lzma.compressSync and lzma.decompressSync round-trip Buffer synchronously","lzma.compress and lzma.decompress round-trip Buffer asynchronously"],"goal":"verify @napi-rs/lzma-linux-x64-gnu.lzma in pkg:npm/%40napi-rs/lzma-linux-x64-gnu@1.5.1","kind":"HOW","packages":["pkg:npm/%40napi-rs/lzma-linux-x64-gnu@1.5.1"],"schemaVersion":1,"symbols":["@napi-rs/lzma-linux-x64-gnu.lzma"]},"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","packageManagerVersion":"10.9.8","runtime":"node","runtimeVersion":"22.23.2","schemaVersion":1},"license":"MIT-0","packages":["pkg:npm/%40napi-rs/lzma-linux-x64-gnu@1.5.1"],"schemaVersion":1,"subject":"pkg:npm/%40napi-rs/lzma-linux-x64-gnu@1.5.1","symbols":["@napi-rs/lzma-linux-x64-gnu.lzma"],"verifierAdapter":"node-typescript@1"}

const os = require('node:os');
const fs = require('node:fs');

// Ensure glibc symbols are available if running in musl-based container with gcompat
const gcompatPaths = ['/lib/libgcompat.so.0', '/usr/lib/libgcompat.so.0'];
for (const p of gcompatPaths) {
  if (fs.existsSync(p)) {
    try {
      const mod = { exports: {} };
      const flags = (os.constants.dlopen?.RTLD_NOW || 2) | (os.constants.dlopen?.RTLD_GLOBAL || 256);
      process.dlopen(mod, p, flags);
    } catch {
      // Shared libraries without Node-API exports throw on registration, but their symbols are loaded globally
    }
    break;
  }
}

const { lzma } = require('@napi-rs/lzma-linux-x64-gnu');

function compressLzmaSync(buffer) {
  return lzma.compressSync(buffer);
}

function decompressLzmaSync(buffer) {
  return lzma.decompressSync(buffer);
}

async function compressLzma(buffer) {
  return await lzma.compress(buffer);
}

async function decompressLzma(buffer) {
  return await lzma.decompress(buffer);
}

module.exports = {
  lzma,
  compressLzmaSync,
  decompressLzmaSync,
  compressLzma,
  decompressLzma,
};

{
  "name": "sample",
  "version": "1.0.0",
  "lockfileVersion": 3,
  "requires": true,
  "packages": {
    "": {
      "name": "sample",
      "version": "1.0.0",
      "dependencies": {
        "@napi-rs/lzma-linux-x64-gnu": "1.5.1"
      }
    },
    "node_modules/@napi-rs/lzma-linux-x64-gnu": {
      "version": "1.5.1",
      "resolved": "https://registry.npmjs.org/@napi-rs/lzma-linux-x64-gnu/-/lzma-linux-x64-gnu-1.5.1.tgz",
      "integrity": "sha512-oTXEIha4SsuXdTA4Iyskj0kpdx2yVXdhd75c2v3xGrHFfVMsbhTPZU/nMPL4sWKo4pBHm3aucLaqGlF696dTyQ==",
      "cpu": [
        "x64"
      ],
      "license": "MIT",
      "os": [
        "linux"
      ],
      "engines": {
        "node": "^22.20 || ^24.12 || >=25"
      }
    }
  }
}

{
  "name": "sample",
  "version": "1.0.0",
  "description": "Minimal sample for @napi-rs/lzma-linux-x64-gnu lzma compression",
  "main": "index.js",
  "type": "commonjs",
  "dependencies": {
    "@napi-rs/lzma-linux-x64-gnu": "1.5.1"
  }
}

{
  "schemaVersion": 1,
  "goal": "verify @napi-rs/lzma-linux-x64-gnu.lzma in pkg:npm/%40napi-rs/lzma-linux-x64-gnu@1.5.1",
  "kind": "HOW",
  "packages": [
    "pkg:npm/%40napi-rs/lzma-linux-x64-gnu@1.5.1"
  ],
  "symbols": [
    "@napi-rs/lzma-linux-x64-gnu.lzma"
  ],
  "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');
const {
  compressLzmaSync,
  decompressLzmaSync,
  compressLzma,
  decompressLzma,
} = require('../index.js');

async function run() {
  const payload = 'CodeSampleX lzma compression verification payload';
  const original = Buffer.from(payload, 'utf8');

  // Contract 1: lzma.compressSync and lzma.decompressSync round-trip Buffer synchronously
  const syncCompressed = compressLzmaSync(original);
  assert(Buffer.isBuffer(syncCompressed), 'compressSync must return a Buffer');
  assert(syncCompressed.length > 0, 'Compressed buffer must not be empty');

  const syncDecompressed = decompressLzmaSync(syncCompressed);
  assert(Buffer.isBuffer(syncDecompressed), 'decompressSync must return a Buffer');
  assert.strictEqual(syncDecompressed.toString('utf8'), payload, 'Sync decompressed text must match original');

  // Contract 2: lzma.compress and lzma.decompress round-trip Buffer asynchronously
  const asyncCompressed = await compressLzma(original);
  assert(Buffer.isBuffer(asyncCompressed), 'compress must resolve to a Buffer');
  assert(asyncCompressed.length > 0, 'Async compressed buffer must not be empty');

  const asyncDecompressed = await decompressLzma(asyncCompressed);
  assert(Buffer.isBuffer(asyncDecompressed), 'decompress must resolve to a Buffer');
  assert.strictEqual(asyncDecompressed.toString('utf8'), payload, 'Async decompressed text must match original');

  console.log('All contract tests passed.');
}

run().catch((err) => {
  console.error(err);
  process.exit(1);
});