bare-bundle 1.10.0: Bundle.prototype.unmount

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/bare-bundle@1.10.0
Kind: HOW

Use EXACTLY these public packages and versions:
  - pkg:npm/bare-bundle@1.10.0
Demonstrate these symbols/APIs:
  - Bundle.prototype.unmount

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:sha256:661118eaf6e8c6e85ce703410aa26c1d0a01496fe7124ff23a16533f21bf1926","contract":["Bundle.prototype.unmount returns a new Bundle instance preserving source bundle immutability","Bundle.prototype.unmount converts files under root URL back to absolute paths","Bundle.prototype.unmount reverses main entry point URL to its specifier path","Bundle.prototype.unmount preserves external URLs whose origin does not match root","Bundle.prototype.unmount unmounts addon and asset paths under the root URL","Bundle.prototype.unmount unmounts nested imports and resolutions specifiers"],"goal":"verify pkg:npm/bare-bundle@1.10.0","kind":"HOW","packages":["pkg:npm/bare-bundle@1.10.0"],"schemaVersion":1,"symbols":["Bundle.prototype.unmount"]},"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-bundle@1.10.0"],"schemaVersion":1,"subject":"pkg:npm/bare-bundle@1.10.0","symbols":["Bundle.prototype.unmount"],"verifierAdapter":"node-typescript@1"}

import Bundle from 'bare-bundle';

/**
 * Unmounts bundle specifiers from a given root URL back to absolute paths.
 * @param {Bundle} bundle
 * @param {string|URL} root
 * @param {object} [opts]
 * @returns {Bundle}
 */
export function unmountBundle(bundle, root, opts) {
  return bundle.unmount(root, opts);
}

/**
 * Mounts and then unmounts a bundle against a root URL.
 * @param {Bundle} bundle
 * @param {string|URL} root
 * @param {object} [opts]
 * @returns {Bundle}
 */
export function roundtripMount(bundle, root, opts) {
  const mounted = bundle.mount(root, opts);
  return mounted.unmount(root, opts);
}

export default Bundle;
export { Bundle };

{
  "name": "sample-bare-bundle",
  "version": "1.0.0",
  "lockfileVersion": 3,
  "requires": true,
  "packages": {
    "": {
      "name": "sample-bare-bundle",
      "version": "1.0.0",
      "license": "MIT-0",
      "dependencies": {
        "bare-bundle": "1.10.0"
      }
    },
    "node_modules/bare-bundle": {
      "version": "1.10.0",
      "resolved": "https://registry.npmjs.org/bare-bundle/-/bare-bundle-1.10.0.tgz",
      "integrity": "sha512-4LVlnJAHr00Hh6Vu6ZUJS38rcEtJT3b3vChXSsBsJ2mk1TN0lQ+gzd+Dw5L0aV7uqDZv84smuwW+O02X7PfDlw==",
      "license": "Apache-2.0",
      "peerDependencies": {
        "bare-buffer": "*",
        "bare-url": "*"
      },
      "peerDependenciesMeta": {
        "bare-buffer": {
          "optional": true
        },
        "bare-url": {
          "optional": true
        }
      }
    }
  }
}

{
  "name": "sample-bare-bundle",
  "version": "1.0.0",
  "type": "module",
  "private": true,
  "license": "MIT-0",
  "scripts": {
    "test": "node test/contract.mjs"
  },
  "dependencies": {
    "bare-bundle": "1.10.0"
  }
}

{
  "schemaVersion": 1,
  "goal": "verify pkg:npm/bare-bundle@1.10.0",
  "kind": "HOW",
  "packages": [
    "pkg:npm/bare-bundle@1.10.0"
  ],
  "symbols": [
    "Bundle.prototype.unmount"
  ]
}

import assert from 'node:assert/strict';
import Bundle, { unmountBundle, roundtripMount } from '../index.js';

// 1. Bundle.prototype.unmount returns a new Bundle instance preserving source bundle immutability
{
  const original = new Bundle();
  original.write('https://example.com/app/index.js', 'console.log("hello");', { main: true });

  const unmounted = original.unmount('https://example.com/app/');

  assert.notEqual(unmounted, original);
  assert.equal(Bundle.isBundle(unmounted), true);
  assert.equal(original.exists('https://example.com/app/index.js'), true);
  assert.equal(original.exists('/index.js'), false);
  assert.equal(unmounted.exists('/index.js'), true);
  assert.equal(unmounted.exists('https://example.com/app/index.js'), false);
}

// 2. Bundle.prototype.unmount converts files under root URL back to absolute paths
{
  const bundle = new Bundle();
  bundle.write('https://example.com/app/index.js', 'console.log("app");');
  bundle.write('https://example.com/app/lib/helper.js', 'console.log("helper");');

  const unmounted = unmountBundle(bundle, 'https://example.com/app/');

  assert.equal(unmounted.exists('/index.js'), true);
  assert.equal(unmounted.exists('/lib/helper.js'), true);
  assert.equal(unmounted.read('/index.js').toString('utf8'), 'console.log("app");');
  assert.equal(unmounted.read('/lib/helper.js').toString('utf8'), 'console.log("helper");');
}

// 3. Bundle.prototype.unmount reverses main entry point URL to its specifier path
{
  const bundle = new Bundle();
  bundle.write('/main.js', 'export default 42;', { main: true });

  const mounted = bundle.mount('https://example.com/app/');
  assert.equal(mounted.main, 'https://example.com/app/main.js');

  const unmounted = mounted.unmount('https://example.com/app/');
  assert.equal(unmounted.main, '/main.js');
  assert.equal(unmounted.read('/main.js').toString('utf8'), 'export default 42;');
}

// 4. Bundle.prototype.unmount preserves external URLs whose origin does not match root
{
  const bundle = new Bundle();
  bundle.write('https://external.example.org/shared.js', 'export const shared = 1;');
  bundle.write('https://example.com/app/local.js', 'export const local = 2;');

  const unmounted = bundle.unmount('https://example.com/app/');

  assert.equal(unmounted.exists('https://external.example.org/shared.js'), true);
  assert.equal(unmounted.exists('/local.js'), true);
  assert.equal(unmounted.read('https://external.example.org/shared.js').toString('utf8'), 'export const shared = 1;');
  assert.equal(unmounted.read('/local.js').toString('utf8'), 'export const local = 2;');
}

// 5. Bundle.prototype.unmount unmounts addon and asset paths under the root URL
{
  const bundle = new Bundle();
  bundle.write('https://example.com/app/native.bare', Buffer.from([0x01, 0x02]), { addon: true });
  bundle.write('https://example.com/app/icon.png', Buffer.from([0x89, 0x50]), { asset: true });

  const unmounted = bundle.unmount('https://example.com/app/');

  assert.deepEqual(unmounted.addons, ['/native.bare']);
  assert.deepEqual(unmounted.assets, ['/icon.png']);
}

// 6. Bundle.prototype.unmount unmounts nested imports and resolutions specifiers
{
  const bundle = new Bundle();
  bundle.write('https://example.com/app/app.js', 'import dep from "dep";', {
    alias: 'main-entry',
    imports: { dep: 'https://example.com/app/dep.js' }
  });

  const unmounted = bundle.unmount('https://example.com/app/');

  assert.deepEqual(unmounted.imports, { 'main-entry': '/app.js' });
  assert.deepEqual(unmounted.resolutions, { '/app.js': { dep: '/dep.js' } });

  // Also test roundtripMount helper
  const roundtripped = roundtripMount(unmounted, 'https://example.com/app/');
  assert.deepEqual(roundtripped.imports, { 'main-entry': '/app.js' });
}

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