index.js
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/*!
* 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 strictCheck = function(str) {
if (str[0] === '!') {
return true;
}
var index = 0;
var pipeIndex = -2;
var closeSquareIndex = -2;
var closeCurlyIndex = -2;
var closeParenIndex = -2;
var backSlashIndex = -2;
while (index < str.length) {
if (str[index] === '*') {
return true;
}
if (str[index + 1] === '?' && /[\].+)]/.test(str[index])) {
return true;
}
if (closeSquareIndex !== -1 && str[index] === '[' && str[index + 1] !== ']') {
if (closeSquareIndex < index) {
closeSquareIndex = str.indexOf(']', index);
}
if (closeSquareIndex > index) {
if (backSlashIndex === -1 || backSlashIndex > closeSquareIndex) {
return true;
}
backSlashIndex = str.indexOf('\\', index);
if (backSlashIndex === -1 || backSlashIndex > closeSquareIndex) {
return true;
}
}
}
if (closeCurlyIndex !== -1 && str[index] === '{' && str[index + 1] !== '}') {
closeCurlyIndex = str.indexOf('}', index);
if (closeCurlyIndex > index) {
backSlashIndex = str.indexOf('\\', index);
if (backSlashIndex === -1 || backSlashIndex > closeCurlyIndex) {
return true;
}
}
}
if (closeParenIndex !== -1 && str[index] === '(' && str[index + 1] === '?' && /[:!=]/.test(str[index + 2]) && str[index + 3] !== ')') {
closeParenIndex = str.indexOf(')', index);
if (closeParenIndex > index) {
backSlashIndex = str.indexOf('\\', index);
if (backSlashIndex === -1 || backSlashIndex > closeParenIndex) {
return true;
}
}
}
if (pipeIndex !== -1 && str[index] === '(' && str[index + 1] !== '|') {
if (pipeIndex < index) {
pipeIndex = str.indexOf('|', index);
}
if (pipeIndex !== -1 && str[pipeIndex + 1] !== ')') {
closeParenIndex = str.indexOf(')', pipeIndex);
if (closeParenIndex > pipeIndex) {
backSlashIndex = str.indexOf('\\', pipeIndex);
if (backSlashIndex === -1 || backSlashIndex > closeParenIndex) {
return true;
}
}
}
}
if (str[index] === '\\') {
var open = str[index + 1];
index += 2;
var close = chars[open];
if (close) {
var n = str.indexOf(close, index);
if (n !== -1) {
index = n + 1;
}
}
if (str[index] === '!') {
return true;
}
} else {
index++;
}
}
return false;
};
var relaxedCheck = function(str) {
if (str[0] === '!') {
return true;
}
var index = 0;
while (index < str.length) {
if (/[*?{}()[\]]/.test(str[index])) {
return true;
}
if (str[index] === '\\') {
var open = str[index + 1];
index += 2;
var close = chars[open];
if (close) {
var n = str.indexOf(close, index);
if (n !== -1) {
index = n + 1;
}
}
if (str[index] === '!') {
return true;
}
} else {
index++;
}
}
return false;
};
module.exports = function isGlob(str, options) {
if (typeof str !== 'string' || str === '') {
return false;
}
if (isExtglob(str)) {
return true;
}
var check = strictCheck;
// optionally relax check
if (options && options.strict === false) {
check = relaxedCheck;
}
return check(str);
};