cloudfunctions/ClearingRedundantFolders/node_modules/walkdir/walkdir.js

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var EventEmitter = require('events').EventEmitter,
_fs = require('fs'),
_path = require('path'),
sep = _path.sep||'/';// 0.6.x


module.exports = walkdir;

walkdir.find = walkdir.walk = walkdir;

walkdir.sync = function(path,options,eventHandler){
  if(typeof options == 'function') cb = options;
  options = options || {};
  options.sync = true;
  return walkdir(path,options,eventHandler);
};

// return promise.
walkdir.async = function(path,options,eventHandler){
  return new Promise((resolve,reject)=>{
    if(typeof options == 'function') cb = options;
    options = options || {};

    let emitter = walkdir(path,options,eventHandler)

    emitter.on('error',reject)
    emitter.on('fail',(path,err)=>{
      err.message = 'Error walking": '+path+' '+err.message
      if(err) reject(err)
    })

    let allPaths = {}
    emitter.on('path',(path,stat)=>{
      if(options.no_return !== true) allPaths[path] = stat;
    })
    emitter.on('end',()=>{
      if(options.no_return !== true){
        return resolve(options.return_object?allPaths:Object.keys(allPaths))
      }
      resolve()
    })
  })
}

function walkdir(path,options,cb){

  if(typeof options == 'function') cb = options;

  options = options || {};
  if(options.find_links === undefined){
    options.find_links = true;
  }
  
  var fs = options.fs || _fs;

  var emitter = new EventEmitter(),
  dontTraverse = [],
  allPaths = (options.return_object?{}:[]),
  resolved = false,
  inos = {},