minimatch 10.1.1: braceExpand

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 minimatch.braceExpand in pkg:npm/minimatch@10.1.1
Kind: HOW

Use EXACTLY these public packages and versions:
  - pkg:npm/minimatch@10.1.1
Demonstrate these symbols/APIs:
  - minimatch.braceExpand

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:sha256:17d36f8c77cca70527ee2f21bd4e22c23a45de677e78fc4a4528a1cadb1a6fc2","contract":["braceExpand expands comma-separated choices inside braces into multiple pattern variations","braceExpand expands numeric range sequences including ascending, descending, and stepped ranges","braceExpand computes permutations for nested and multiple brace expansion sets in a single pattern","braceExpand leaves patterns without brace syntax unchanged and returns them in a single-element array","braceExpand respects options such as nobrace to disable expansion and return the literal pattern"],"goal":"verify minimatch.braceExpand in pkg:npm/minimatch@10.1.1","kind":"HOW","packages":["pkg:npm/minimatch@10.1.1"],"schemaVersion":1,"symbols":["minimatch.braceExpand"]},"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/minimatch@10.1.1"],"schemaVersion":1,"symbols":["minimatch.braceExpand"],"verifierAdapter":"node-typescript@1"}

{
  "name": "sample-minimatch-brace-expand",
  "version": "1.0.0",
  "lockfileVersion": 3,
  "requires": true,
  "packages": {
    "": {
      "name": "sample-minimatch-brace-expand",
      "version": "1.0.0",
      "license": "MIT-0",
      "dependencies": {
        "minimatch": "10.1.1"
      }
    },
    "node_modules/@isaacs/balanced-match": {
      "version": "4.0.1",
      "resolved": "https://registry.npmjs.org/@isaacs/balanced-match/-/balanced-match-4.0.1.tgz",
      "integrity": "sha512-yzMTt9lEb8Gv7zRioUilSglI0c0smZ9k5D65677DLWLtWJaXIS3CqcGyUFByYKlnUj6TkjLVs54fBl6+TiGQDQ==",
      "license": "MIT",
      "engines": {
        "node": "20 || >=22"
      }
    },
    "node_modules/@isaacs/brace-expansion": {
      "version": "5.0.1",
      "resolved": "https://registry.npmjs.org/@isaacs/brace-expansion/-/brace-expansion-5.0.1.tgz",
      "integrity": "sha512-WMz71T1JS624nWj2n2fnYAuPovhv7EUhk69R6i9dsVyzxt5eM3bjwvgk9L+APE1TRscGysAVMANkB0jh0LQZrQ==",
      "license": "MIT",
      "dependencies": {
        "@isaacs/balanced-match": "^4.0.1"
      },
      "engines": {
        "node": "20 || >=22"
      }
    },
    "node_modules/minimatch": {
      "version": "10.1.1",
      "resolved": "https://registry.npmjs.org/minimatch/-/minimatch-10.1.1.tgz",
      "integrity": "sha512-enIvLvRAFZYXJzkCYG5RKmPfrFArdLv+R+lbQ53BmIMLIry74bjKzX6iHAm8WYamJkhSSEabrWN5D97XnKObjQ==",
      "license": "BlueOak-1.0.0",
      "dependencies": {
        "@isaacs/brace-expansion": "^5.0.0"
      },
      "engines": {
        "node": "20 || >=22"
      },
      "funding": {
        "url": "https://github.com/sponsors/isaacs"
      }
    }
  }
}

{
  "name": "sample-minimatch-brace-expand",
  "version": "1.0.0",
  "type": "module",
  "private": true,
  "license": "MIT-0",
  "dependencies": {
    "minimatch": "10.1.1"
  }
}

{
  "schemaVersion": 1,
  "goal": "verify minimatch.braceExpand in pkg:npm/minimatch@10.1.1",
  "kind": "HOW",
  "packages": [
    "pkg:npm/minimatch@10.1.1"
  ],
  "symbols": [
    "minimatch.braceExpand"
  ]
}

import { braceExpand } from 'minimatch';

export function expandBraces(pattern, options = {}) {
  return braceExpand(pattern, options);
}

export function expandMultiplePatterns(patterns, options = {}) {
  return patterns.flatMap((pattern) => braceExpand(pattern, options));
}

import assert from 'node:assert/strict';
import { braceExpand, minimatch } from 'minimatch';

// braceExpand expands comma-separated choices inside braces into multiple pattern variations
{
  const result1 = braceExpand('a/{b,c}/d');
  assert.deepEqual(result1, ['a/b/d', 'a/c/d']);

  const result2 = braceExpand('images/*.{png,jpg,gif}');
  assert.deepEqual(result2, ['images/*.png', 'images/*.jpg', 'images/*.gif']);

  assert.equal(typeof minimatch.braceExpand, 'function');
  assert.deepEqual(minimatch.braceExpand('a/{x,y}'), ['a/x', 'a/y']);
}

// braceExpand expands numeric range sequences including ascending, descending, and stepped ranges
{
  const ascending = braceExpand('file{1..3}.txt');
  assert.deepEqual(ascending, ['file1.txt', 'file2.txt', 'file3.txt']);

  const descending = braceExpand('file{3..1}.txt');
  assert.deepEqual(descending, ['file3.txt', 'file2.txt', 'file1.txt']);

  const stepped = braceExpand('{1..5..2}');
  assert.deepEqual(stepped, ['1', '3', '5']);
}

// braceExpand computes permutations for nested and multiple brace expansion sets in a single pattern
{
  const nested = braceExpand('src/{components,utils}/*.{js,ts}');
  assert.deepEqual(nested, [
    'src/components/*.js',
    'src/components/*.ts',
    'src/utils/*.js',
    'src/utils/*.ts',
  ]);

  const deepNested = braceExpand('{a,b{1..2}}');
  assert.deepEqual(deepNested, ['a', 'b1', 'b2']);
}

// braceExpand leaves patterns without brace syntax unchanged and returns them in a single-element array
{
  const plain = braceExpand('src/**/*.js');
  assert.deepEqual(plain, ['src/**/*.js']);

  const literal = braceExpand('plain-string');
  assert.deepEqual(literal, ['plain-string']);
}

// braceExpand respects options such as nobrace to disable expansion and return the literal pattern
{
  const disabled = braceExpand('a/{b,c}/d', { nobrace: true });
  assert.deepEqual(disabled, ['a/{b,c}/d']);
}

console.log('Contract test passed successfully.');