start refactoring

backup.js

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+'use strict';
+
+/**
+ * Module dependencies
+ */
+
+const toRegex = require('to-regex');
+const unique = require('array-unique');
+const extend = require('extend-shallow');
+
+/**
+ * Local dependencies
+ */
+
+const compilers = require('./lib/compilers');
+const parsers = require('./lib/parsers');
+const Braces = require('./lib/braces');
+const utils = require('./lib/utils');
+const MAX_LENGTH = 1024 * 64;
+let cache = {};
+
+/**
+ * Convert the given `braces` pattern into a regex-compatible string. By default, only one string is generated for every input string. Set `options.expand` to true to return an array of patterns (similar to Bash or minimatch. Before using `options.expand`, it's recommended that you read the [performance notes](#performance)).
+ *
+ * ```js
+ * var braces = require('braces');
+ * console.log(braces('{a,b,c}'));
+ * //=> ['(a|b|c)']
+ *
+ * console.log(braces('{a,b,c}', {expand: true}));
+ * //=> ['a', 'b', 'c']
+ * ```
+ * @param {String} `str`
+ * @param {Object} `options`
+ * @return {String}
+ * @api public
+ */
+
+function braces(pattern, options) {
+  var key = utils.createKey(String(pattern), options);
+  var arr = [];
+
+  var disabled = options && options.cache === false;
+  if (!disabled && cache.hasOwnProperty(key)) {
+    return cache[key];
+  }
+
+  if (Array.isArray(pattern)) {
+    for (var i = 0; i < pattern.length; i++) {
+      arr.push.apply(arr, braces.create(pattern[i], options));
+    }
+  } else {
+    arr = braces.create(pattern, options);
+  }
+
+  if (options && options.nodupes === true) {
+    arr = unique(arr);
+  }
+
+  if (!disabled) {
+    cache[key] = arr;
+  }
+  return arr;
+}
+
+/**
+ * Expands a brace pattern into an array. This method is called by the main [braces](#braces) function when `options.expand` is true. Before using this method it's recommended that you read the [performance notes](#performance)) and advantages of using [.optimize](#optimize) instead.
+ *
+ * ```js
+ * var braces = require('braces');
+ * console.log(braces.expand('a/{b,c}/d'));
+ * //=> ['a/b/d', 'a/c/d'];
+ * ```
+ * @param {String} `pattern` Brace pattern
+ * @param {Object} `options`
+ * @return {Array} Returns an array of expanded values.
+ * @api public
+ */
+
+braces.expand = function(pattern, options) {
+  return braces.create(pattern, extend({}, options, { expand: true }));
+};
+
+/**
+ * Expands a brace pattern into a regex-compatible, optimized string. This method is called by the main [braces](#braces) function by default.
+ *
+ * ```js
+ * var braces = require('braces');
+ * console.log(braces.expand('a/{b,c}/d'));
+ * //=> ['a/(b|c)/d']
+ * ```
+ * @param {String} `pattern` Brace pattern
+ * @param {Object} `options`
+ * @return {Array} Returns an array of expanded values.
+ * @api public
+ */
+
+braces.optimize = function(pattern, options) {
+  return braces.create(pattern, options);
+};
+
+/**
+ * Processes a brace pattern and returns either an expanded array (if `options.expand` is true), a highly optimized regex-compatible string. This method is called by the main [braces](#braces) function.
+ *
+ * ```js
+ * var braces = require('braces');
+ * console.log(braces.create('user-{200..300}/project-{a,b,c}-{1..10}'))
+ * //=> 'user-(20[0-9]|2[1-9][0-9]|300)/project-(a|b|c)-([1-9]|10)'
+ * ```
+ * @param {String} `pattern` Brace pattern
+ * @param {Object} `options`
+ * @return {Array} Returns an array of expanded values.
+ * @api public
+ */
+
+braces.create = function(pattern, options) {
+  if (typeof pattern !== 'string') {
+    throw new TypeError('expected a string');
+  }
+
+  var maxLength = (options && options.maxLength) || MAX_LENGTH;
+  if (pattern.length >= maxLength) {
+    throw new Error('expected pattern to be less than ' + maxLength + ' characters');
+  }
+
+  function create() {
+    if (pattern === '' || pattern.length < 3) {
+      return [pattern];
+    }
+
+    if (utils.isEmptySets(pattern)) {
+      return [];
+    }
+
+    if (utils.isQuotedString(pattern)) {
+      return [pattern.slice(1, -1)];
+    }
+
+    var proto = new Braces(options);
+    var result = !options || options.expand !== true
+      ? proto.optimize(pattern, options)
+      : proto.expand(pattern, options);
+
+    // get the generated pattern(s)
+    var arr = result.output;
+
+    // filter out empty strings if specified
+    if (options && options.noempty === true) {
+      arr = arr.filter(Boolean);
+    }
+
+    // filter out duplicates if specified
+    if (options && options.nodupes === true) {
+      arr = unique(arr);
+    }
+
+    Object.defineProperty(arr, 'result', {
+      enumerable: false,
+      value: result
+    });
+
+    return arr;
+  }
+
+  return memoize('create', pattern, options, create);
+};
+
+/**
+ * Create a regular expression from the given string `pattern`.
+ *
+ * ```js
+ * var braces = require('braces');
+ *
+ * console.log(braces.makeRe('id-{200..300}'));
+ * //=> /^(?:id-(20[0-9]|2[1-9][0-9]|300))$/
+ * ```
+ * @param {String} `pattern` The pattern to convert to regex.
+ * @param {Object} `options`
+ * @return {RegExp}
+ * @api public
+ */
+
+braces.makeRe = function(pattern, options) {
+  if (typeof pattern !== 'string') {
+    throw new TypeError('expected a string');
+  }
+
+  var maxLength = (options && options.maxLength) || MAX_LENGTH;
+  if (pattern.length >= maxLength) {
+    throw new Error('expected pattern to be less than ' + maxLength + ' characters');
+  }
+
+  function makeRe() {
+    var arr = braces(pattern, options);
+    var opts = extend({strictErrors: false}, options);
+    return toRegex(arr, opts);
+  }
+
+  return memoize('makeRe', pattern, options, makeRe);
+};
+
+/**
+ * Parse the given `str` with the given `options`.
+ *
+ * ```js
+ * var braces = require('braces');
+ * var ast = braces.parse('a/{b,c}/d');
+ * console.log(ast);
+ * // { type: 'root',
+ * //   errors: [],
+ * //   input: 'a/{b,c}/d',
+ * //   nodes:
+ * //    [ { type: 'bos', val: '' },
+ * //      { type: 'text', val: 'a/' },
+ * //      { type: 'brace',
+ * //        nodes:
+ * //         [ { type: 'brace.open', val: '{' },
+ * //           { type: 'text', val: 'b,c' },
+ * //           { type: 'brace.close', val: '}' } ] },
+ * //      { type: 'text', val: '/d' },
+ * //      { type: 'eos', val: '' } ] }
+ * ```
+ * @param {String} `pattern` Brace pattern to parse
+ * @param {Object} `options`
+ * @return {Object} Returns an AST
+ * @api public
+ */
+
+braces.parse = function(pattern, options) {
+  var proto = new Braces(options);
+  return proto.parse(pattern, options);
+};
+
+/**
+ * Compile the given `ast` or string with the given `options`.
+ *
+ * ```js
+ * var braces = require('braces');
+ * var ast = braces.parse('a/{b,c}/d');
+ * console.log(braces.compile(ast));
+ * // { options: { source: 'string' },
+ * //   state: {},
+ * //   compilers:
+ * //    { eos: [Function],
+ * //      noop: [Function],
+ * //      bos: [Function],
+ * //      brace: [Function],
+ * //      'brace.open': [Function],
+ * //      text: [Function],
+ * //      'brace.close': [Function] },
+ * //   output: [ 'a/(b|c)/d' ],
+ * //   ast:
+ * //    { ... },
+ * //   parsingErrors: [] }
+ * ```
+ * @param {Object|String} `ast` AST from [.parse](#parse). If a string is passed it will be parsed first.
+ * @param {Object} `options`
+ * @return {Object} Returns an object that has an `output` property with the compiled string.
+ * @api public
+ */
+
+braces.compile = function(ast, options) {
+  var proto = new Braces(options);
+  return proto.compile(ast, options);
+};
+
+/**
+ * Clear the regex cache.
+ *
+ * ```js
+ * braces.clearCache();
+ * ```
+ * @api public
+ */
+
+braces.clearCache = function() {
+  cache = braces.cache = {};
+};
+
+/**
+ * Memoize a generated regex or function. A unique key is generated
+ * from the method name, pattern, and user-defined options. Set
+ * options.memoize to false to disable.
+ */
+
+function memoize(type, pattern, options, fn) {
+  var key = utils.createKey(type + ':' + pattern, options);
+  var disabled = options && options.cache === false;
+  if (disabled) {
+    braces.clearCache();
+    return fn(pattern, options);
+  }
+
+  if (cache.hasOwnProperty(key)) {
+    return cache[key];
+  }
+
+  var res = fn(pattern, options);
+  cache[key] = res;
+  return res;
+}
+
+/**
+ * Expose `Braces` constructor and methods
+ * @type {Function}
+ */
+
+braces.Braces = Braces;
+braces.compilers = compilers;
+braces.parsers = parsers;
+braces.cache = cache;
+
+/**
+ * Expose `braces`
+ * @type {Function}
+ */
+
+module.exports = braces;

bench/index.js

@@ -0,0 +1,78 @@
+'use strict';
+
+const { Suite } = require('benchmark');
+const colors = require('ansi-colors');
+const argv = require('minimist')(process.argv.slice(2));
+const minimatch = require('minimatch');
+const compile = require('../lib/compile');
+const expand = require('../lib/expand');
+const parse = require('../lib/parse');
+
+/**
+ * Setup
+ */
+
+const cycle = (e, newline) => {
+  process.stdout.write(`\u001b[G  ${e.target}${newline ? `\n` : ''}`);
+};
+
+const bench = (name, options) => {
+  const config = { name, ...options };
+  const suite = new Suite(config);
+  const add = suite.add.bind(suite);
+  suite.on('error', console.error);
+
+  if (argv.run && !new RegExp(argv.run).test(name)) {
+    suite.add = () => suite;
+    return suite;
+  }
+
+  console.log(colors.green(`● ${config.name}`));
+
+  suite.add = (key, fn, opts) => {
+    if (typeof fn !== 'function') opts = fn;
+
+    add(key, {
+      onCycle: e => cycle(e),
+      onComplete: e => cycle(e, true),
+      fn,
+      ...opts
+    });
+    return suite;
+  };
+
+  return suite;
+};
+
+const skip = () => {};
+skip.add = () => skip;
+skip.run = () => skip;
+bench.skip = name => {
+  console.log(colors.cyan('● ' + colors.unstyle(name) + ' (skipped)'));
+  return skip;
+};
+
+bench('parse set')
+  .add('picomatch', () => parse('foo/{a,b,c}/bar'))
+  .add('minimatch', () => minimatch.braceExpand('foo/{a,b,c}/bar'))
+  .run();
+
+bench('parse nested sets')
+  .add('picomatch', () => parse('foo/{a,b,{x,y,z}}/bar'))
+  .add('minimatch', () => minimatch.braceExpand('foo/{a,b,{x,y,z}}/bar'))
+  .run();
+
+bench('parse range')
+  .add('picomatch', () => parse('foo/{a..z}/bar'))
+  .add('minimatch', () => minimatch.braceExpand('foo/{a..z}/bar'))
+  .run();
+
+bench.skip('expand')
+  .add('picomatch', () => expand(parse('foo/{a,b,c}/bar')))
+  .add('minimatch', () => minimatch.braceExpand('foo/{a,b,c}/bar'))
+  .run();
+
+bench.skip('compile')
+  .add('picomatch', () => compile(parse('foo/{a,b,c}/bar')))
+  .add('minimatch', () => minimatch.makeRe('foo/{a,b,c}/bar'))
+  .run();