gulp-webpack.js

var util = require('loader-utils');
var File = require('vinyl');

var gulp2webpack = function(streamConstructor, opt) {
  opt = opt || {};

  return function(content) {
    var cb = this.async();
    if (opt.cacheable) this.cacheable();
    
    var file = new File({
      path: this.resourcePath,
      base: this.context,
      content: content
    });
    
    var stream = streamConstructor(util.parseQuery(this.query));
    stream.once('error', this.emitError);
    stream.once('data', function(file){
      cb(null, file.content);
    });
    
    stream.write(file);
    stream.end();
  };
};

/*
Example usage:
*/
var react = require('gulp-react');
var loader = gulp2webpack(react, {cacheable: true});