1  /*!
 2   * normalize-path <https://github.com/jonschlinkert/normalize-path>
 3   *
 4   * Copyright (c) 2014-2018, Jon Schlinkert.
 5   * Released under the MIT License.
 6   */
 7  
 8  module.exports = function(path, stripTrailing) {
 9    if (typeof path !== 'string') {
10      throw new TypeError('expected path to be a string');
11    }
12  
13    if (path === '\\' || path === '/') return '/';
14  
15    var len = path.length;
16    if (len <= 1) return path;
17  
18    // ensure that win32 namespaces has two leading slashes, so that the path is
19    // handled properly by the win32 version of path.parse() after being normalized
20    // https://msdn.microsoft.com/library/windows/desktop/aa365247(v=vs.85).aspx#namespaces
21    var prefix = '';
22    if (len > 4 && path[3] === '\\') {
23      var ch = path[2];
24      if ((ch === '?' || ch === '.') && path.slice(0, 2) === '\\\\') {
25        path = path.slice(2);
26        prefix = '//';
27      }
28    }
29  
30    var segs = path.split(/[/\\]+/);
31    if (stripTrailing !== false && segs[segs.length - 1] === '') {
32      segs.pop();
33    }
34    return prefix + segs.join('/');
35  };