cacache 19.0.1: ls

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 cacache.ls in pkg:npm/cacache@19.0.1
Kind: HOW

Use EXACTLY these public packages and versions:
  - pkg:npm/cacache@19.0.1
Demonstrate these symbols/APIs:
  - cacache.ls

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:sha256:1aebac381a5a5168cdcdda7db88a04411e3f032e5647d96f06853625895c0441","contract":["cacache.ls returns an object keyed by entry key containing key, integrity, size, and metadata for each cached entry","cacache.ls.stream yields each cached index entry as an async iterable stream"],"goal":"verify cacache.ls in pkg:npm/cacache@19.0.1","kind":"HOW","packages":["pkg:npm/cacache@19.0.1"],"schemaVersion":1,"symbols":["cacache.ls"]},"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/cacache@19.0.1"],"schemaVersion":1,"subject":"pkg:npm/cacache@19.0.1","symbols":["cacache.ls"],"verifierAdapter":"node-typescript@1"}

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  "name": "cacache-ls-sample",
  "version": "1.0.0",
  "lockfileVersion": 3,
  "requires": true,
  "packages": {
    "": {
      "name": "cacache-ls-sample",
      "version": "1.0.0",
      "dependencies": {
        "cacache": "19.0.1"
      }
    },
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      "license": "ISC",
      "dependencies": {
        "string-width": "^5.1.2",
        "string-width-cjs": "npm:string-width@^4.2.0",
        "strip-ansi": "^7.0.1",
        "strip-ansi-cjs": "npm:strip-ansi@^6.0.1",
        "wrap-ansi": "^8.1.0",
        "wrap-ansi-cjs": "npm:wrap-ansi@^7.0.0"
      },
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      "dependencies": {
        "semver": "^7.3.5"
      },
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      }
    },
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}

{
  "name": "cacache-ls-sample",
  "version": "1.0.0",
  "private": true,
  "type": "module",
  "scripts": {
    "test": "node test/contract.mjs"
  },
  "dependencies": {
    "cacache": "19.0.1"
  }
}

{
  "schemaVersion": 1,
  "goal": "verify cacache.ls in pkg:npm/cacache@19.0.1",
  "kind": "HOW",
  "packages": [
    "pkg:npm/cacache@19.0.1"
  ],
  "symbols": [
    "cacache.ls"
  ]
}

import cacache from 'cacache';

export async function listCacheEntries(cacheDir, entries) {
  for (const entry of entries) {
    await cacache.put(cacheDir, entry.key, Buffer.from(entry.content, 'utf8'), {
      metadata: entry.metadata
    });
  }

  const allEntries = await cacache.ls(cacheDir);

  const streamedEntries = [];
  for await (const item of cacache.ls.stream(cacheDir)) {
    streamedEntries.push(item);
  }

  return {
    allEntries,
    streamedEntries
  };
}

import assert from 'node:assert/strict';
import { rm } from 'node:fs/promises';
import { listCacheEntries } from '../src/index.mjs';

const cacheDir = './.cache-ls-test';

await rm(cacheDir, { recursive: true, force: true });
try {
  const inputEntries = [
    { key: 'alpha', content: 'first-value', metadata: { index: 1 } },
    { key: 'beta', content: 'second-value-longer', metadata: { index: 2 } }
  ];

  const { allEntries, streamedEntries } = await listCacheEntries(cacheDir, inputEntries);

  assert.deepEqual(Object.keys(allEntries).sort(), ['alpha', 'beta']);
  assert.equal(allEntries.alpha.key, 'alpha');
  assert.equal(allEntries.alpha.size, 11);
  assert.deepEqual(allEntries.alpha.metadata, { index: 1 });
  assert.equal(typeof allEntries.alpha.integrity, 'string');
  assert.equal(allEntries.alpha.integrity.startsWith('sha512-'), true);

  assert.equal(allEntries.beta.key, 'beta');
  assert.equal(allEntries.beta.size, 19);
  assert.deepEqual(allEntries.beta.metadata, { index: 2 });

  const streamedKeys = streamedEntries.map((item) => item.key).sort();
  assert.deepEqual(streamedKeys, ['alpha', 'beta']);
} finally {
  await rm(cacheDir, { recursive: true, force: true });
}