cidr-regex 4.1.3

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/cidr-regex@4.1.3
Kind: HOW

Use EXACTLY these public packages and versions:
  - pkg:npm/cidr-regex@4.1.3

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:sha256:4c3f871c77d54371b20254be9a99c5c9a23076183f6ee60884030b9ad25066a0","contract":["cidrRegex({ exact: true }) matches valid IPv4/IPv6 CIDR strings and rejects invalid prefix lengths or surrounding text","cidrRegex.v4({ exact: true }) / v4({ exact: true }) matches only IPv4 CIDR notation (prefix 0-32)","cidrRegex.v6({ exact: true }) / v6({ exact: true }) matches only IPv6 CIDR notation (prefix 0-128)","cidrRegex(), cidrRegex.v4(), and cidrRegex.v6() default to global RegExp for extracting CIDR blocks from text"],"goal":"verify pkg:npm/cidr-regex@4.1.3","kind":"HOW","packages":["pkg:npm/cidr-regex@4.1.3"],"schemaVersion":1,"symbols":["cidrRegex","cidrRegex.v4","cidrRegex.v6","v4","v6"]},"contractCommand":["node","test/contract.mjs"],"environment":{"arch":"x64","distro":"ubuntu","ecosystem":"npm","executionContext":"node","libc":"glibc","libcVersion":"2.39","moduleSystem":"esm","os":"linux","osVersionBucket":"24","packageManager":"npm","schemaVersion":1},"license":"MIT-0","packages":["pkg:npm/cidr-regex@4.1.3"],"schemaVersion":1,"subject":"pkg:npm/cidr-regex@4.1.3","verifierAdapter":"node-typescript@1"}

import cidrRegex, { v4, v6 } from "cidr-regex";

export function isCidr(input) {
  return cidrRegex({ exact: true }).test(input);
}

export function isCidrV4(input) {
  return v4({ exact: true }).test(input);
}

export function isCidrV6(input) {
  return v6({ exact: true }).test(input);
}

export function extractCidrs(text) {
  return text.match(cidrRegex()) ?? [];
}

export function extractCidrV4s(text) {
  return text.match(cidrRegex.v4()) ?? [];
}

export function extractCidrV6s(text) {
  return text.match(cidrRegex.v6()) ?? [];
}

{
  "name": "cidr-regex-sample",
  "version": "1.0.0",
  "lockfileVersion": 3,
  "requires": true,
  "packages": {
    "": {
      "name": "cidr-regex-sample",
      "version": "1.0.0",
      "dependencies": {
        "cidr-regex": "4.1.3"
      }
    },
    "node_modules/cidr-regex": {
      "version": "4.1.3",
      "resolved": "https://registry.npmjs.org/cidr-regex/-/cidr-regex-4.1.3.tgz",
      "integrity": "sha512-86M1y3ZeQvpZkZejQCcS+IaSWjlDUC+ORP0peScQ4uEUFCZ8bEQVz7NlJHqysoUb6w3zCjx4Mq/8/2RHhMwHYw==",
      "license": "BSD-2-Clause",
      "dependencies": {
        "ip-regex": "^5.0.0"
      },
      "engines": {
        "node": ">=14"
      }
    },
    "node_modules/ip-regex": {
      "version": "5.0.0",
      "resolved": "https://registry.npmjs.org/ip-regex/-/ip-regex-5.0.0.tgz",
      "integrity": "sha512-fOCG6lhoKKakwv+C6KdsOnGvgXnmgfmp0myi3bcNwj3qfwPAxRKWEuFhvEFF7ceYIz6+1jRZ+yguLFAmUNPEfw==",
      "license": "MIT",
      "engines": {
        "node": "^12.20.0 || ^14.13.1 || >=16.0.0"
      },
      "funding": {
        "url": "https://github.com/sponsors/sindresorhus"
      }
    }
  }
}

{
  "name": "cidr-regex-sample",
  "version": "1.0.0",
  "private": true,
  "type": "module",
  "scripts": {
    "test": "node test/contract.mjs"
  },
  "dependencies": {
    "cidr-regex": "4.1.3"
  }
}

{
  "schemaVersion": 1,
  "goal": "verify pkg:npm/cidr-regex@4.1.3",
  "kind": "HOW",
  "packages": [
    "pkg:npm/cidr-regex@4.1.3"
  ]
}

import assert from "node:assert/strict";
import cidrRegex, { v4, v6 } from "cidr-regex";
import {
  isCidr,
  isCidrV4,
  isCidrV6,
  extractCidrs,
  extractCidrV4s,
  extractCidrV6s
} from "../index.mjs";

// Default export and named exports match
assert.equal(cidrRegex.v4, v4);
assert.equal(cidrRegex.v6, v6);

// Exact matching for IPv4 and IPv6 CIDRs
assert.equal(isCidr("192.168.0.0/24"), true);
assert.equal(isCidr("10.0.0.1/32"), true);
assert.equal(isCidr("2001:db8::/32"), true);
assert.equal(isCidr("fe80::1/128"), true);
assert.equal(isCidr("192.168.0.0/33"), false);
assert.equal(isCidr("2001:db8::/129"), false);
assert.equal(isCidr("192.168.0.1"), false);
assert.equal(isCidr("subnet 192.168.0.0/24 here"), false);

// Version-specific exact matching
assert.equal(isCidrV4("192.168.0.0/24"), true);
assert.equal(isCidrV4("2001:db8::/32"), false);
assert.equal(isCidrV6("2001:db8::/32"), true);
assert.equal(isCidrV6("192.168.0.0/24"), false);

// Global extraction from text (non-exact default)
const text = "Allowed ranges: 10.0.0.0/8, 172.16.0.0/12, and 2001:db8:abcd::/48.";
assert.deepEqual(extractCidrs(text), [
  "10.0.0.0/8",
  "172.16.0.0/12",
  "2001:db8:abcd::/48"
]);
assert.deepEqual(extractCidrV4s(text), ["10.0.0.0/8", "172.16.0.0/12"]);
assert.deepEqual(extractCidrV6s(text), ["2001:db8:abcd::/48"]);
assert.deepEqual(extractCidrs("no cidr blocks here"), []);