picomatch 2.3.2

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/picomatch@2.3.2
Kind: HOW

Use EXACTLY these public packages and versions:
  - pkg:npm/picomatch@2.3.2
Constraints:
  - executionContext: node
Required runtime conditions:
  - ecosystem: npm
  - language: javascript
  - moduleSystem: cjs
  - packageManager: npm@10.9.8
  - runtime: node@22.23.2

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:sha256:4c8d305f92c97cfc254d87f30ab3ec866843a00e18d6b707d97faac9407398f1","constraints":{"executionContext":"node"},"contract":["picomatch creates compiled matcher functions supporting wildcards, brace expansions, and negated patterns","picomatch.isMatch evaluates paths against glob patterns with support for case-insensitivity, dotfiles, and ignore rules","picomatch.scan parses glob patterns into components including static base directory, glob portion, and isGlob metadata","picomatch.makeRe compiles glob patterns into RegExp instances for regular expression matching"],"goal":"verify pkg:npm/picomatch@2.3.2","kind":"HOW","packages":["pkg:npm/picomatch@2.3.2"],"schemaVersion":1},"contractCommand":["node","test/contract.js"],"environment":{"arch":"x64","distro":"ubuntu","ecosystem":"npm","executionContext":"node","language":"javascript","libc":"glibc","libcVersion":"2.39","moduleSystem":"cjs","os":"linux","osVersionBucket":"24","packageManager":"npm","packageManagerVersion":"10.9.8","runtime":"node","runtimeVersion":"22.23.2","schemaVersion":1},"license":"MIT-0","packages":["pkg:npm/picomatch@2.3.2"],"schemaVersion":1,"subject":"pkg:npm/picomatch@2.3.2","verifierAdapter":"node-typescript@1"}

{
  "name": "picomatch-sample",
  "version": "1.0.0",
  "lockfileVersion": 3,
  "requires": true,
  "packages": {
    "": {
      "name": "picomatch-sample",
      "version": "1.0.0",
      "dependencies": {
        "picomatch": "2.3.2"
      }
    },
    "node_modules/picomatch": {
      "version": "2.3.2",
      "resolved": "https://registry.npmjs.org/picomatch/-/picomatch-2.3.2.tgz",
      "integrity": "sha512-V7+vQEJ06Z+c5tSye8S+nHUfI51xoXIXjHQ99cQtKUkQqqO1kO/KCJUfZXuB47h/YBlDhah2H3hdUGXn8ie0oA==",
      "license": "MIT",
      "engines": {
        "node": ">=8.6"
      },
      "funding": {
        "url": "https://github.com/sponsors/jonschlinkert"
      }
    }
  }
}

{
  "name": "picomatch-sample",
  "version": "1.0.0",
  "dependencies": {
    "picomatch": "2.3.2"
  }
}

{
  "schemaVersion": 1,
  "goal": "verify pkg:npm/picomatch@2.3.2",
  "kind": "HOW",
  "packages": [
    "pkg:npm/picomatch@2.3.2"
  ],
  "constraints": {
    "executionContext": "node"
  },
  "runtimeConditions": {
    "ecosystem": "npm",
    "language": "javascript",
    "moduleSystem": "cjs",
    "packageManager": "npm@10.9.8",
    "runtime": "node@22.23.2"
  }
}

const picomatch = require('picomatch');

/**
 * Creates a compiled matcher function for one or more glob patterns.
 *
 * @param {string|string[]} patterns - Glob pattern or array of patterns.
 * @param {object} [options] - Picomatch options.
 * @returns {(input: string) => boolean} Matcher function.
 */
function createMatcher(patterns, options) {
  return picomatch(patterns, options);
}

/**
 * Tests whether a path string matches a glob pattern.
 *
 * @param {string} input - Path string to test.
 * @param {string|string[]} patterns - Glob pattern or patterns.
 * @param {object} [options] - Options such as ignore, nocase, dot.
 * @returns {boolean} True if matched.
 */
function matchPath(input, patterns, options) {
  return picomatch.isMatch(input, patterns, options);
}

/**
 * Scans a glob pattern string to extract static base path, glob component, and metadata.
 *
 * @param {string} pattern - Glob pattern to analyze.
 * @param {object} [options] - Scan options.
 * @returns {object} Scan result object.
 */
function scanPattern(pattern, options) {
  return picomatch.scan(pattern, options);
}

/**
 * Compiles a glob pattern into a regular expression.
 *
 * @param {string} pattern - Glob pattern.
 * @param {object} [options] - Regex options.
 * @returns {RegExp} Compiled RegExp.
 */
function compilePattern(pattern, options) {
  return picomatch.makeRe(pattern, options);
}

module.exports = {
  createMatcher,
  matchPath,
  scanPattern,
  compilePattern,
  picomatch,
};

const assert = require('node:assert/strict');
const {
  createMatcher,
  matchPath,
  scanPattern,
  compilePattern,
} = require('../src/index.js');

// Contract 1: picomatch creates compiled matcher functions supporting wildcards, brace expansions, and negated patterns
{
  const isImage = createMatcher('*.{png,jpg,webp}');
  assert.strictEqual(isImage('photo.jpg'), true, 'Should match jpg via brace expansion');
  assert.strictEqual(isImage('banner.webp'), true, 'Should match webp via brace expansion');
  assert.strictEqual(isImage('vector.svg'), false, 'Should not match non-listed extension');

  const isSource = createMatcher(['src/**/*.js', 'src/**/*.ts']);
  assert.strictEqual(isSource('src/index.js'), true, 'Should match js file in src');
  assert.strictEqual(isSource('src/components/App.ts'), true, 'Should match ts file in nested src');
  assert.strictEqual(isSource('docs/readme.md'), false, 'Should not match md file outside src');

  const notTest = createMatcher('!**/*.test.js');
  assert.strictEqual(notTest('src/index.js'), true, 'Negated pattern matches non-test file');
  assert.strictEqual(notTest('src/index.test.js'), false, 'Negated pattern rejects test file');
}

// Contract 2: picomatch.isMatch evaluates paths against glob patterns with support for case-insensitivity, dotfiles, and ignore rules
{
  assert.strictEqual(matchPath('lib/utils.js', 'lib/*.js'), true, 'Direct match in lib directory');
  assert.strictEqual(matchPath('lib/sub/utils.js', 'lib/*.js'), false, 'Single star should not cross directory boundaries');

  assert.strictEqual(matchPath('README.MD', '*.md', { nocase: true }), true, 'nocase: true allows case-insensitive match');
  assert.strictEqual(matchPath('README.MD', '*.md', { nocase: false }), false, 'nocase: false enforces case sensitivity');

  assert.strictEqual(matchPath('.env', '*.env', { dot: true }), true, 'dot: true matches dotfiles');
  assert.strictEqual(matchPath('.env', '*.env', { dot: false }), false, 'dot: false ignores dotfiles by default');

  assert.strictEqual(
    matchPath('node_modules/pkg/index.js', '**/*.js', { ignore: '**/node_modules/**' }),
    false,
    'ignore option excludes matching paths'
  );
}

// Contract 3: picomatch.scan parses glob patterns into components including static base directory, glob portion, and isGlob metadata
{
  const scanned = scanPattern('src/assets/**/*.svg');
  assert.strictEqual(scanned.base, 'src/assets', 'Base directory before any glob characters');
  assert.strictEqual(scanned.glob, '**/*.svg', 'Glob portion extracted');
  assert.strictEqual(scanned.isGlob, true, 'isGlob should be true for wildcard pattern');

  const staticScan = scanPattern('src/config/settings.json');
  assert.strictEqual(staticScan.base, 'src/config/settings.json', 'Static path base equals full input');
  assert.strictEqual(staticScan.glob, '', 'Static path has empty glob portion');
  assert.strictEqual(staticScan.isGlob, false, 'isGlob should be false for static path');
}

// Contract 4: picomatch.makeRe compiles glob patterns into RegExp instances for regular expression matching
{
  const re = compilePattern('build/*.min.js');
  assert.ok(re instanceof RegExp, 'Should return a RegExp instance');
  assert.strictEqual(re.test('build/app.min.js'), true, 'Compiled regex matches expected target');
  assert.strictEqual(re.test('build/app.js'), false, 'Compiled regex rejects unmatched target');
  assert.strictEqual(re.test('dist/app.min.js'), false, 'Compiled regex respects directory prefix');
}

console.log('All pkg:npm/picomatch@2.3.2 contracts passed successfully.');