cacache 19.0.1

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/cacache@19.0.1
Kind: HOW

Use EXACTLY these public packages and versions:
  - pkg:npm/cacache@19.0.1

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:sha256:0013abca24b5c55a3ea87d128dcdab6c4fa7dc8e6a726f8aa5548a5d6c92ecd4","contract":["cacache.put stores data under a key with metadata and returns an sha512 integrity string","cacache.get and cacache.get.byDigest read back the exact stored Buffer payload and metadata","cacache.ls lists active index entries and cacache.verify checks content integrity and records lastRun","cacache.rm.entry and cacache.rm.content remove the index entry and content blob from the cache"],"goal":"verify pkg:npm/cacache@19.0.1","kind":"HOW","packages":["pkg:npm/cacache@19.0.1"],"schemaVersion":1},"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","verifierAdapter":"node-typescript@1"}

{
  "name": "cacache-sample",
  "version": "1.0.0",
  "lockfileVersion": 3,
  "requires": true,
  "packages": {
    "": {
      "name": "cacache-sample",
      "version": "1.0.0",
      "dependencies": {
        "cacache": "19.0.1"
      }
    },
    "node_modules/@isaacs/cliui": {
      "version": "8.0.2",
      "resolved": "https://registry.npmjs.org/@isaacs/cliui/-/cliui-8.0.2.tgz",
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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"
      },
      "engines": {
        "node": ">=12"
      }
    },
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      "license": "ISC",
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      },
      "engines": {
        "node": ">=18.0.0"
      }
    },
    "node_modules/@npmcli/fs": {
      "version": "4.0.0",
      "resolved": "https://registry.npmjs.org/@npmcli/fs/-/fs-4.0.0.tgz",
      "integrity": "sha512-/xGlezI6xfGO9NwuJlnwz/K14qD1kCSAGtacBHnGzeAIuJGazcp45KP5NuyARXoKb7cwulAGWVsbeSxdG/cb0Q==",
      "license": "ISC",
      "dependencies": {
        "semver": "^7.3.5"
      },
      "engines": {
        "node": "^18.17.0 || >=20.5.0"
      }
    },
    "node_modules/@pkgjs/parseargs": {
      "version": "0.11.0",
      "resolved": "https://registry.npmjs.org/@pkgjs/parseargs/-/parseargs-0.11.0.tgz",
      "integrity": "sha512-+1VkjdD0QBLPodGrJUeqarH8VAIvQODIbwh9XpP5Syisf7YoQgsJKPNFoqqLQlu+VQ/tVSshMR6loPMn8U+dPg==",
      "license": "MIT",
      "optional": true,
      "engines": {
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      }
    },
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      "license": "MIT",
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      "funding": {
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      }
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      "license": "MIT",
      "engines": {
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      },
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        "url": "https://github.com/chalk/ansi-styles?sponsor=1"
      }
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}

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

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

import cacache from 'cacache';

export async function runCacheLifecycle(cacheDir) {
  const key = 'greeting-entry';
  const payload = Buffer.from('hello content-addressable cache', 'utf8');
  const metadata = { contentType: 'text/plain', tag: 'v1' };

  const integrity = await cacache.put(cacheDir, key, payload, { metadata });

  const retrieved = await cacache.get(cacheDir, key);
  const byDigest = await cacache.get.byDigest(cacheDir, integrity);
  const info = await cacache.get.info(cacheDir, key);
  const listing = await cacache.ls(cacheDir);

  const verifyStats = await cacache.verify(cacheDir);
  const lastVerified = await cacache.verify.lastRun(cacheDir);

  await cacache.rm.entry(cacheDir, key);
  const infoAfterEntryRm = await cacache.get.info(cacheDir, key);

  await cacache.rm.content(cacheDir, integrity);
  const hasContentAfterRm = await cacache.get.hasContent(cacheDir, integrity);

  return {
    integrity: String(integrity),
    retrievedText: retrieved.data.toString('utf8'),
    retrievedSize: retrieved.size,
    retrievedMetadata: retrieved.metadata,
    byDigestText: byDigest.toString('utf8'),
    infoKey: info.key,
    listedKeys: Object.keys(listing),
    verifiedContent: verifyStats.verifiedContent,
    totalEntries: verifyStats.totalEntries,
    lastVerifiedIsDate: lastVerified instanceof Date && !Number.isNaN(lastVerified.getTime()),
    infoAfterEntryRm,
    hasContentAfterRm
  };
}

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

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

await rm(cacheDir, { recursive: true, force: true });
try {
  const result = await runCacheLifecycle(cacheDir);

  assert.equal( result.integrity.startsWith('sha512-'), true );
  assert.equal( result.retrievedText, 'hello content-addressable cache' );
  assert.equal( result.retrievedSize, 31 );
  assert.deepEqual( result.retrievedMetadata, { contentType: 'text/plain', tag: 'v1' } );
  assert.equal( result.byDigestText, 'hello content-addressable cache' );
  assert.equal( result.infoKey, 'greeting-entry' );
  assert.deepEqual( result.listedKeys, ['greeting-entry'] );
  assert.equal( result.verifiedContent, 1 );
  assert.equal( result.totalEntries, 1 );
  assert.equal( result.lastVerifiedIsDate, true );
  assert.equal( result.infoAfterEntryRm, null );
  assert.equal( result.hasContentAfterRm, false );
} finally {
  await rm(cacheDir, { recursive: true, force: true });
}