node 简单文件复制

node_dirCopy

var fs = require('fs'),
    path = require('path');

exports.merge = function(src,des,cb){
  if(!cb) cb = function(){}

  var src = path.resolve(src),
      des = path.resolve(des);
  if(src.indexOf(des)){
    return cb(new Error('error'));
  }

  fs.stat(src,function(err,stat){
      if(err&&err.code !=='ENOENT'){
        return cb(err);
      }
      _merge = function(src,des){
          fs.mkdir(des,function(err){
            if(err&&err.code!=='EEXIST'){
                return cb(err);
            }

            var files = fs.readdirSync(src),
                len = files.length;

            for(var i=0;i<len;i++){
              (function(i){
                var srcPath = path.join(src,files[i]),
                    desPath = path.join(des,files[i]),
                    stat = fs.statSync(srcPath);
                if(stat.isDirectory()){
                  _merge(srcPath,desPath);
                }else{
                  fs.stat(desPath,function(err,stat)){
                    if(!err&&!stat.isDirectory()){
                      var readStream = fs.createReadStream(srcPath);
                      var writeStream = fs.createWriteStream(desPath);
                      readStream.pipe(writeStream);
                      cb();
                    }else{
                      cb(err);
                    }
                  }
                }
              )(i);
            };
          );
      }
      _merge(src,des);
  });
}

//调用方式
var fsUtils = require('');
fsUtils.merge('d1','d2',function(err){
  if(err){
      console.log(err.toString());
  }else{
      console.log('done');
  }
});