332 lines
8.0 KiB
JavaScript
332 lines
8.0 KiB
JavaScript
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'use strict';
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/**
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* Module dependencies
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*/
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var extend = require('extend-shallow');
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var unique = require('array-unique');
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var toRegex = require('to-regex');
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/**
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* Local dependencies
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*/
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var compilers = require('./lib/compilers');
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var parsers = require('./lib/parsers');
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var Extglob = require('./lib/extglob');
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var utils = require('./lib/utils');
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var MAX_LENGTH = 1024 * 64;
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/**
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* Convert the given `extglob` pattern into a regex-compatible string. Returns
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* an object with the compiled result and the parsed AST.
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*
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* ```js
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* var extglob = require('extglob');
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* console.log(extglob('*.!(*a)'));
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* //=> '(?!\\.)[^/]*?\\.(?!(?!\\.)[^/]*?a\\b).*?'
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* ```
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* @param {String} `pattern`
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* @param {Object} `options`
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* @return {String}
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* @api public
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*/
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function extglob(pattern, options) {
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return extglob.create(pattern, options).output;
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}
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/**
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* Takes an array of strings and an extglob pattern and returns a new
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* array that contains only the strings that match the pattern.
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*
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* ```js
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* var extglob = require('extglob');
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* console.log(extglob.match(['a.a', 'a.b', 'a.c'], '*.!(*a)'));
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* //=> ['a.b', 'a.c']
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* ```
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* @param {Array} `list` Array of strings to match
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* @param {String} `pattern` Extglob pattern
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* @param {Object} `options`
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* @return {Array} Returns an array of matches
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* @api public
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*/
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extglob.match = function(list, pattern, options) {
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if (typeof pattern !== 'string') {
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throw new TypeError('expected pattern to be a string');
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}
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list = utils.arrayify(list);
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var isMatch = extglob.matcher(pattern, options);
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var len = list.length;
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var idx = -1;
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var matches = [];
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while (++idx < len) {
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var ele = list[idx];
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if (isMatch(ele)) {
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matches.push(ele);
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}
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}
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// if no options were passed, uniquify results and return
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if (typeof options === 'undefined') {
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return unique(matches);
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}
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if (matches.length === 0) {
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if (options.failglob === true) {
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throw new Error('no matches found for "' + pattern + '"');
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}
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if (options.nonull === true || options.nullglob === true) {
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return [pattern.split('\\').join('')];
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}
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}
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return options.nodupes !== false ? unique(matches) : matches;
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};
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/**
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* Returns true if the specified `string` matches the given
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* extglob `pattern`.
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*
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* ```js
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* var extglob = require('extglob');
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*
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* console.log(extglob.isMatch('a.a', '*.!(*a)'));
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* //=> false
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* console.log(extglob.isMatch('a.b', '*.!(*a)'));
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* //=> true
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* ```
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* @param {String} `string` String to match
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* @param {String} `pattern` Extglob pattern
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* @param {String} `options`
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* @return {Boolean}
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* @api public
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*/
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extglob.isMatch = function(str, pattern, options) {
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if (typeof pattern !== 'string') {
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throw new TypeError('expected pattern to be a string');
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}
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if (typeof str !== 'string') {
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throw new TypeError('expected a string');
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}
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if (pattern === str) {
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return true;
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}
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if (pattern === '' || pattern === ' ' || pattern === '.') {
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return pattern === str;
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}
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var isMatch = utils.memoize('isMatch', pattern, options, extglob.matcher);
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return isMatch(str);
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};
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/**
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* Returns true if the given `string` contains the given pattern. Similar to `.isMatch` but
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* the pattern can match any part of the string.
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*
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* ```js
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* var extglob = require('extglob');
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* console.log(extglob.contains('aa/bb/cc', '*b'));
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* //=> true
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* console.log(extglob.contains('aa/bb/cc', '*d'));
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* //=> false
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* ```
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* @param {String} `str` The string to match.
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* @param {String} `pattern` Glob pattern to use for matching.
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* @param {Object} `options`
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* @return {Boolean} Returns true if the patter matches any part of `str`.
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* @api public
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*/
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extglob.contains = function(str, pattern, options) {
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if (typeof str !== 'string') {
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throw new TypeError('expected a string');
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}
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if (pattern === '' || pattern === ' ' || pattern === '.') {
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return pattern === str;
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}
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var opts = extend({}, options, {contains: true});
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opts.strictClose = false;
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opts.strictOpen = false;
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return extglob.isMatch(str, pattern, opts);
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};
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/**
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* Takes an extglob pattern and returns a matcher function. The returned
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* function takes the string to match as its only argument.
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*
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* ```js
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* var extglob = require('extglob');
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* var isMatch = extglob.matcher('*.!(*a)');
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*
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* console.log(isMatch('a.a'));
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* //=> false
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* console.log(isMatch('a.b'));
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* //=> true
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* ```
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* @param {String} `pattern` Extglob pattern
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* @param {String} `options`
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* @return {Boolean}
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* @api public
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*/
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extglob.matcher = function(pattern, options) {
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if (typeof pattern !== 'string') {
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throw new TypeError('expected pattern to be a string');
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}
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function matcher() {
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var re = extglob.makeRe(pattern, options);
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return function(str) {
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return re.test(str);
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};
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}
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return utils.memoize('matcher', pattern, options, matcher);
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};
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/**
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* Convert the given `extglob` pattern into a regex-compatible string. Returns
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* an object with the compiled result and the parsed AST.
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*
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* ```js
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* var extglob = require('extglob');
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* console.log(extglob.create('*.!(*a)').output);
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* //=> '(?!\\.)[^/]*?\\.(?!(?!\\.)[^/]*?a\\b).*?'
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* ```
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* @param {String} `str`
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* @param {Object} `options`
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* @return {String}
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* @api public
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*/
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extglob.create = function(pattern, options) {
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if (typeof pattern !== 'string') {
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throw new TypeError('expected pattern to be a string');
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}
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function create() {
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var ext = new Extglob(options);
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var ast = ext.parse(pattern, options);
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return ext.compile(ast, options);
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}
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return utils.memoize('create', pattern, options, create);
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};
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/**
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* Returns an array of matches captured by `pattern` in `string`, or `null`
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* if the pattern did not match.
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*
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* ```js
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* var extglob = require('extglob');
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* extglob.capture(pattern, string[, options]);
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*
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* console.log(extglob.capture('test/*.js', 'test/foo.js'));
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* //=> ['foo']
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* console.log(extglob.capture('test/*.js', 'foo/bar.css'));
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* //=> null
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* ```
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* @param {String} `pattern` Glob pattern to use for matching.
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* @param {String} `string` String to match
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* @param {Object} `options` See available [options](#options) for changing how matches are performed
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* @return {Boolean} Returns an array of captures if the string matches the glob pattern, otherwise `null`.
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* @api public
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*/
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extglob.capture = function(pattern, str, options) {
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var re = extglob.makeRe(pattern, extend({capture: true}, options));
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function match() {
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return function(string) {
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var match = re.exec(string);
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if (!match) {
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return null;
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}
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return match.slice(1);
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};
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}
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var capture = utils.memoize('capture', pattern, options, match);
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return capture(str);
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};
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/**
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* Create a regular expression from the given `pattern` and `options`.
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*
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* ```js
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* var extglob = require('extglob');
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* var re = extglob.makeRe('*.!(*a)');
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* console.log(re);
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* //=> /^[^\/]*?\.(?![^\/]*?a)[^\/]*?$/
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* ```
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* @param {String} `pattern` The pattern to convert to regex.
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* @param {Object} `options`
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* @return {RegExp}
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* @api public
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*/
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extglob.makeRe = function(pattern, options) {
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if (pattern instanceof RegExp) {
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return pattern;
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}
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if (typeof pattern !== 'string') {
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throw new TypeError('expected pattern to be a string');
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}
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if (pattern.length > MAX_LENGTH) {
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throw new Error('expected pattern to be less than ' + MAX_LENGTH + ' characters');
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}
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function makeRe() {
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var opts = extend({strictErrors: false}, options);
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if (opts.strictErrors === true) opts.strict = true;
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var res = extglob.create(pattern, opts);
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return toRegex(res.output, opts);
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}
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var regex = utils.memoize('makeRe', pattern, options, makeRe);
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if (regex.source.length > MAX_LENGTH) {
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throw new SyntaxError('potentially malicious regex detected');
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}
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return regex;
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};
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/**
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* Cache
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*/
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extglob.cache = utils.cache;
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extglob.clearCache = function() {
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extglob.cache.__data__ = {};
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};
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/**
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* Expose `Extglob` constructor, parsers and compilers
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*/
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extglob.Extglob = Extglob;
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extglob.compilers = compilers;
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extglob.parsers = parsers;
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/**
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* Expose `extglob`
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* @type {Function}
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*/
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module.exports = extglob;
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