--- /dev/null
+/*!
+ * is-glob <https://github.com/jonschlinkert/is-glob>
+ *
+ * Copyright (c) 2014-2017, Jon Schlinkert.
+ * Released under the MIT License.
+ */
+
+var isExtglob = require('is-extglob');
+var chars = { '{': '}', '(': ')', '[': ']'};
+var strictRegex = /\\(.)|(^!|\*|[\].+)]\?|\[[^\\\]]+\]|\{[^\\}]+\}|\(\?[:!=][^\\)]+\)|\([^|]+\|[^\\)]+\))/;
+var relaxedRegex = /\\(.)|(^!|[*?{}()[\]]|\(\?)/;
+
+module.exports = function isGlob(str, options) {
+ if (typeof str !== 'string' || str === '') {
+ return false;
+ }
+
+ if (isExtglob(str)) {
+ return true;
+ }
+
+ var regex = strictRegex;
+ var match;
+
+ // optionally relax regex
+ if (options && options.strict === false) {
+ regex = relaxedRegex;
+ }
+
+ while ((match = regex.exec(str))) {
+ if (match[2]) return true;
+ var idx = match.index + match[0].length;
+
+ // if an open bracket/brace/paren is escaped,
+ // set the index to the next closing character
+ var open = match[1];
+ var close = open ? chars[open] : null;
+ if (open && close) {
+ var n = str.indexOf(close, idx);
+ if (n !== -1) {
+ idx = n + 1;
+ }
+ }
+
+ str = str.slice(idx);
+ }
+ return false;
+};