--- /dev/null
+'use strict';
+var Promise = require('pinkie-promise');
+var arrayUnion = require('array-union');
+var objectAssign = require('object-assign');
+var glob = require('glob');
+var pify = require('pify');
+
+var globP = pify(glob, Promise).bind(glob);
+
+function isNegative(pattern) {
+ return pattern[0] === '!';
+}
+
+function isString(value) {
+ return typeof value === 'string';
+}
+
+function assertPatternsInput(patterns) {
+ if (!patterns.every(isString)) {
+ throw new TypeError('patterns must be a string or an array of strings');
+ }
+}
+
+function generateGlobTasks(patterns, opts) {
+ patterns = [].concat(patterns);
+ assertPatternsInput(patterns);
+
+ var globTasks = [];
+
+ opts = objectAssign({
+ cache: Object.create(null),
+ statCache: Object.create(null),
+ realpathCache: Object.create(null),
+ symlinks: Object.create(null),
+ ignore: []
+ }, opts);
+
+ patterns.forEach(function (pattern, i) {
+ if (isNegative(pattern)) {
+ return;
+ }
+
+ var ignore = patterns.slice(i).filter(isNegative).map(function (pattern) {
+ return pattern.slice(1);
+ });
+
+ globTasks.push({
+ pattern: pattern,
+ opts: objectAssign({}, opts, {
+ ignore: opts.ignore.concat(ignore)
+ })
+ });
+ });
+
+ return globTasks;
+}
+
+module.exports = function (patterns, opts) {
+ var globTasks;
+
+ try {
+ globTasks = generateGlobTasks(patterns, opts);
+ } catch (err) {
+ return Promise.reject(err);
+ }
+
+ return Promise.all(globTasks.map(function (task) {
+ return globP(task.pattern, task.opts);
+ })).then(function (paths) {
+ return arrayUnion.apply(null, paths);
+ });
+};
+
+module.exports.sync = function (patterns, opts) {
+ var globTasks = generateGlobTasks(patterns, opts);
+
+ return globTasks.reduce(function (matches, task) {
+ return arrayUnion(matches, glob.sync(task.pattern, task.opts));
+ }, []);
+};
+
+module.exports.generateGlobTasks = generateGlobTasks;
+
+module.exports.hasMagic = function (patterns, opts) {
+ return [].concat(patterns).some(function (pattern) {
+ return glob.hasMagic(pattern, opts);
+ });
+};