text: /*
  	MIT License http://www.opensource.org/licenses/mit-license.php
  	Author Tobias Koppers @sokra
  */
  var concord = require("./concord");
  var DescriptionFileUtils = require("./DescriptionFileUtils");
  var forEachBail = require("./forEachBail");
  var createInnerCallback = require("./createInnerCallback");
  
  function ConcordExtensionsPlugin(source, options, target) {
  	this.source = source;
  	this.options = options;
  	this.target = target;
  }
  module.exports = ConcordExtensionsPlugin;
  
  ConcordExtensionsPlugin.prototype.apply = function(resolver) {
  	var target = this.target;
  	resolver.plugin(this.source, function(request, callback) {
  		var concordField = DescriptionFileUtils.getField(request.descriptionFileData, "concord");
  		if(!concordField) return callback();
  		var extensions = concord.getExtensions(request.context, concordField);
  		if(!extensions) return callback();
  		var topLevelCallback = callback;
  		forEachBail(extensions, function(appending, callback) {
  			var obj = Object.assign({}, request, {
  				path: request.path + appending,
  				relativePath: request.relativePath && (request.relativePath + appending)
  			});
  			resolver.doResolve(target, obj, "concord extension: " + appending, createInnerCallback(callback, topLevelCallback));
  		}, function(err, result) {
  			if(arguments.length > 0) return callback(err, result);
  
  			callback(null, null);
  		});
  	});
  };
  