/*符合CommonJs规范*/
var writePath = 'min.js',/*默认输出到本目录min.js文件里*/
fs = require('fs'),
r1 = /^(.+)$/mg,/*分行*/
r2 = /\s{2,}/g,/*去空格*/
r3 = /([^\\])\/\/.*/g,/*去行注释*/
r4 = /\/\*.*?\*\//g,/*去块注释*/
str = '';
module.exports.run = function(input){
input.forEach(function(item){
/*合并对顺序有需求，所以同步读取文件*/
var data = fs.readFileSync(item, 'utf8'),
lines = data.match(r1);/*行数组*/
/*拼成一串*/
lines.forEach(function(item){
item = item.replace(r3, function($1, $2){return $2;});
str = str + item;
});
});
str = str.replace(r2,' ').replace(r4, ''); 
/*异步写入到目标文件*/
fs.appendFile(writePath, str, {encoding: 'utf8'}, function(err){
if(err) {throw err};
console.log('complete........');
});
}; 

var a = require('./compress.js');/*加载compress模块 ‘./'表示相同目录下查找本地文件*/
var input = process.argv;/*获取控制台输入数组（process引用当前进程）*/
a.run(input.slice(2)/*忽略前数组前两个*/);