std-env 4.2.0: provider

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 std-env.provider in pkg:npm/std-env@4.2.0
Kind: HOW

Use EXACTLY these public packages and versions:
  - pkg:npm/std-env@4.2.0
Demonstrate these symbols/APIs:
  - std-env.provider

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:sha256:54337bc8afd9225f0b9572555aaab9319024b462f1d50316f1339cf30d0d8fe3","contract":["std-env.provider exports a string representing the detected CI or hosting provider","std-env.provider matches providerInfo.name","std-env.provider evaluates to an empty string when no provider environment variables are present","std-env.provider detects github_actions when GITHUB_ACTIONS environment variable is set","std-env.provider detects vercel when VERCEL environment variable is set","std-env.provider detects netlify when NETLIFY environment variable is set","std-env.provider detects cloudflare_pages when CF_PAGES environment variable is set"],"goal":"verify std-env.provider in pkg:npm/std-env@4.2.0","kind":"HOW","packages":["pkg:npm/std-env@4.2.0"],"schemaVersion":1,"symbols":["std-env.provider"]},"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/std-env@4.2.0"],"schemaVersion":1,"subject":"pkg:npm/std-env@4.2.0","symbols":["std-env.provider"],"verifierAdapter":"node-typescript@1"}

import { provider, providerInfo } from 'std-env';

export { provider, providerInfo };
export default provider;

{
  "name": "sample-std-env-provider",
  "version": "1.0.0",
  "lockfileVersion": 3,
  "requires": true,
  "packages": {
    "": {
      "name": "sample-std-env-provider",
      "version": "1.0.0",
      "license": "MIT-0",
      "dependencies": {
        "std-env": "4.2.0"
      }
    },
    "node_modules/std-env": {
      "version": "4.2.0",
      "resolved": "https://registry.npmjs.org/std-env/-/std-env-4.2.0.tgz",
      "integrity": "sha512-oCUKSupKTHX53EyjDtuZQ64pjLJ6yYCtpmEw0goYxtjG9KpbRe8KAsl2tBUGU9DyMcJ0RwJ8GqJAFzMXcXW1Rw==",
      "license": "MIT"
    }
  }
}

{
  "name": "sample-std-env-provider",
  "version": "1.0.0",
  "type": "module",
  "main": "index.mjs",
  "license": "MIT-0",
  "scripts": {
    "test": "node test/contract.mjs"
  },
  "dependencies": {
    "std-env": "4.2.0"
  }
}

{
  "schemaVersion": 1,
  "goal": "verify std-env.provider in pkg:npm/std-env@4.2.0",
  "kind": "HOW",
  "packages": [
    "pkg:npm/std-env@4.2.0"
  ],
  "symbols": [
    "std-env.provider"
  ]
}

import assert from 'node:assert/strict';
import * as stdEnv from 'std-env';
import { provider, providerInfo } from '../index.mjs';

// 1. std-env.provider exports a string representing the detected CI or hosting provider
{
  assert.strictEqual(typeof provider, 'string', 'provider must be a string');
  assert.strictEqual(typeof stdEnv.provider, 'string', 'stdEnv.provider must be a string');
}

// 2. std-env.provider matches providerInfo.name
{
  assert.strictEqual(provider, providerInfo.name, 'provider must match providerInfo.name');
  assert.strictEqual(stdEnv.provider, stdEnv.providerInfo.name, 'stdEnv.provider must match stdEnv.providerInfo.name');
}

const KNOWN_PROVIDER_ENV_VARS = [
  'APPVEYOR',
  'AWS_APP_ID',
  'AWS_AMPLIFY',
  'SYSTEM_TEAMFOUNDATIONCOLLECTIONURI',
  'INPUT_AZURE_STATIC_WEB_APPS_API_TOKEN',
  'AC_APPCIRCLE',
  'bamboo_planKey',
  'BITBUCKET_COMMIT',
  'BITRISE_IO',
  'BUDDY_WORKSPACE_ID',
  'BUILDKITE',
  'CIRCLECI',
  'CIRRUS_CI',
  'CF_PAGES',
  'WORKERS_CI',
  'K_SERVICE',
  'CLOUD_RUN_JOB',
  'CODEBUILD_BUILD_ARN',
  'CF_BUILD_ID',
  'DRONE',
  'DRONE_BUILD_EVENT',
  'DSARI',
  'GITHUB_ACTIONS',
  'GITLAB_CI',
  'CI_MERGE_REQUEST_ID',
  'GO_PIPELINE_LABEL',
  'LAYERCI',
  'JENKINS_URL',
  'HUDSON_URL',
  'MAGNUM',
  'NETLIFY',
  'NETLIFY_LOCAL',
  'NEVERCODE',
  'RENDER',
  'SAILCI',
  'SEMAPHORE',
  'SCREWDRIVER',
  'SHIPPABLE',
  'TDDIUM',
  'STRIDER',
  'TEAMCITY_VERSION',
  'TRAVIS',
  'NOW_BUILDER',
  'VERCEL',
  'VERCEL_ENV',
  'APPCENTER_BUILD_ID',
  'CODESANDBOX_SSE',
  'CODESANDBOX_HOST',
  'STACKBLITZ',
  'STORMKIT',
  'CLEAVR',
  'ZEABUR',
  'CODESPHERE_APP_ID',
  'RAILWAY_PROJECT_ID',
  'RAILWAY_SERVICE_ID',
  'DENO_DEPLOYMENT_ID',
  'FIREBASE_APP_HOSTING',
];

let queryCounter = 0;
const stdEnvUrl = import.meta.resolve('std-env');

async function withEnv(tempEnv, fn) {
  const saved = {};
  for (const k of KNOWN_PROVIDER_ENV_VARS) {
    if (k in process.env) {
      saved[k] = process.env[k];
      delete process.env[k];
    }
  }
  for (const [k, v] of Object.entries(tempEnv)) {
    process.env[k] = v;
  }
  try {
    const mod = await import(`${stdEnvUrl}?q=${queryCounter++}`);
    await fn(mod);
  } finally {
    for (const k of Object.keys(tempEnv)) {
      delete process.env[k];
    }
    for (const [k, v] of Object.entries(saved)) {
      process.env[k] = v;
    }
  }
}

// 3. std-env.provider evaluates to an empty string when no provider environment variables are present
await withEnv({}, (mod) => {
  assert.strictEqual(mod.provider, '', 'provider must be empty string when no provider env var is present');
  assert.strictEqual(mod.provider, mod.providerInfo.name, 'provider must match providerInfo.name');
});

// 4. std-env.provider detects github_actions when GITHUB_ACTIONS environment variable is set
await withEnv({ GITHUB_ACTIONS: 'true' }, (mod) => {
  assert.strictEqual(mod.provider, 'github_actions', 'provider must be github_actions');
  assert.strictEqual(mod.provider, mod.providerInfo.name, 'provider must match providerInfo.name');
});

// 5. std-env.provider detects vercel when VERCEL environment variable is set
await withEnv({ VERCEL: '1' }, (mod) => {
  assert.strictEqual(mod.provider, 'vercel', 'provider must be vercel');
  assert.strictEqual(mod.provider, mod.providerInfo.name, 'provider must match providerInfo.name');
});

// 6. std-env.provider detects netlify when NETLIFY environment variable is set
await withEnv({ NETLIFY: 'true' }, (mod) => {
  assert.strictEqual(mod.provider, 'netlify', 'provider must be netlify');
  assert.strictEqual(mod.provider, mod.providerInfo.name, 'provider must match providerInfo.name');
});

// 7. std-env.provider detects cloudflare_pages when CF_PAGES environment variable is set
await withEnv({ CF_PAGES: '1' }, (mod) => {
  assert.strictEqual(mod.provider, 'cloudflare_pages', 'provider must be cloudflare_pages');
  assert.strictEqual(mod.provider, mod.providerInfo.name, 'provider must match providerInfo.name');
});

console.log('All std-env.provider contract assertions passed.');