https://gist.github.com/suneo3476/11142718 でcallback処理を書き直したもの

index.js

module.exports.pattern = '^.?@%me% .+';

module.exports.main = function(twi, data, cfg){

	console.log('JIKANWARI called');

	var BOT_ID = cfg.my_screen_name;
	var twUserId = data.user.screen_name;
	var keyword = data.text.replace(new RegExp('^.?@' + BOT_ID + ' '), '');

	//keywordで検索した結果がコールバック関数の引数replyStrとして返ってきます
	search(keyword, function(replyStr){
		twi.updateStatus('@' + twUserId + ' ' + replyStr + '', function (error,data) {
			if(!(error && error.statusCode)){
				console.log('updateStatus done');
			}else{
				console.log(error);
				console.log('updateStatus failed');
			}
		});
	});	

	function search(keyword, callback) {

		var csv = require('ya-csv');
		var reader = csv.createCsvFileReader('./commands/jikanwari/jikanwari.csv');
		var data = [];

		var terms = ['前期','後期'];
		var term = '前期';//hard-cording TODO
		var days = ['日','月','火','水','木','金','土'];
		var day = days[(new Date()).getDay()] + '曜';

		reader.on('data', function(record) {
			data.push(record);
		}).on('end', function() {
			var result = [];
			//一致したものをresultにつめて
			for(var i = 1; i < data.length; i++){
				if( data[i][3] != term) continue; // 学期フィルタ
				if( data[i][4] != day ) continue; // 曜日フィルタ
				if( (new RegExp('' + keyword.replace(/\W/g,'\\$&') + '').test(data[i][0])) )
					result.push(data[i].join(' '));
			}
			//コールバック！
			if(result.length > 0 )
				callback(result.join(' | '));
			else
				callback('???');
		});
	};

};