/*!
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								 * is-glob <https://github.com/jonschlinkert/is-glob>
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								 *
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								 * Copyright (c) 2014-2017, Jon Schlinkert.
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								 * Released under the MIT License.
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								 */
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								var isExtglob = require('is-extglob');
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								var chars = { '{': '}', '(': ')', '[': ']'};
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								var strictCheck = function(str) {
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								  if (str[0] === '!') {
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								    return true;
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								  }
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								  var index = 0;
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								  var pipeIndex = -2;
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								  var closeSquareIndex = -2;
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								  var closeCurlyIndex = -2;
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								  var closeParenIndex = -2;
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								  var backSlashIndex = -2;
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								  while (index < str.length) {
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								    if (str[index] === '*') {
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								      return true;
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								    }
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								    if (str[index + 1] === '?' && /[\].+)]/.test(str[index])) {
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								      return true;
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								    }
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								    if (closeSquareIndex !== -1 && str[index] === '[' && str[index + 1] !== ']') {
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								      if (closeSquareIndex < index) {
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								        closeSquareIndex = str.indexOf(']', index);
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								      }
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								      if (closeSquareIndex > index) {
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								        if (backSlashIndex === -1 || backSlashIndex > closeSquareIndex) {
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								          return true;
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								        }
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								        backSlashIndex = str.indexOf('\\', index);
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								        if (backSlashIndex === -1 || backSlashIndex > closeSquareIndex) {
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								          return true;
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								        }
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								      }
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								    }
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								    if (closeCurlyIndex !== -1 && str[index] === '{' && str[index + 1] !== '}') {
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								      closeCurlyIndex = str.indexOf('}', index);
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								      if (closeCurlyIndex > index) {
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								        backSlashIndex = str.indexOf('\\', index);
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								        if (backSlashIndex === -1 || backSlashIndex > closeCurlyIndex) {
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								          return true;
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								        }
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								      }
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								    }
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								    if (closeParenIndex !== -1 && str[index] === '(' && str[index + 1] === '?' && /[:!=]/.test(str[index + 2]) && str[index + 3] !== ')') {
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								      closeParenIndex = str.indexOf(')', index);
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								      if (closeParenIndex > index) {
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								        backSlashIndex = str.indexOf('\\', index);
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								        if (backSlashIndex === -1 || backSlashIndex > closeParenIndex) {
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								          return true;
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								        }
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								      }
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								    }
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								    if (pipeIndex !== -1 && str[index] === '(' && str[index + 1] !== '|') {
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								      if (pipeIndex < index) {
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								        pipeIndex = str.indexOf('|', index);
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								      }
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								      if (pipeIndex !== -1 && str[pipeIndex + 1] !== ')') {
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								        closeParenIndex = str.indexOf(')', pipeIndex);
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								        if (closeParenIndex > pipeIndex) {
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								          backSlashIndex = str.indexOf('\\', pipeIndex);
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								          if (backSlashIndex === -1 || backSlashIndex > closeParenIndex) {
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								            return true;
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								          }
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								        }
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								      }
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								    }
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								    if (str[index] === '\\') {
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								      var open = str[index + 1];
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								      index += 2;
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								      var close = chars[open];
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								      if (close) {
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								        var n = str.indexOf(close, index);
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								        if (n !== -1) {
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								          index = n + 1;
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								        }
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								      }
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								      if (str[index] === '!') {
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								        return true;
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								      }
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								    } else {
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								      index++;
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								    }
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								  }
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								  return false;
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								};
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								var relaxedCheck = function(str) {
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								  if (str[0] === '!') {
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								    return true;
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								  }
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								  var index = 0;
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								  while (index < str.length) {
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								    if (/[*?{}()[\]]/.test(str[index])) {
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								      return true;
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								    }
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								    if (str[index] === '\\') {
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								      var open = str[index + 1];
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								      index += 2;
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								      var close = chars[open];
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								      if (close) {
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								        var n = str.indexOf(close, index);
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								        if (n !== -1) {
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								          index = n + 1;
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								        }
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								      }
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								      if (str[index] === '!') {
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								        return true;
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								      }
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								    } else {
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								      index++;
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								    }
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								  }
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								  return false;
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								};
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								module.exports = function isGlob(str, options) {
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								  if (typeof str !== 'string' || str === '') {
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								    return false;
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								  }
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								  if (isExtglob(str)) {
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								    return true;
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								  }
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								  var check = strictCheck;
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								  // optionally relax check
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								  if (options && options.strict === false) {
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								    check = relaxedCheck;
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								  }
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								  return check(str);
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								};
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