使用node的插件UglifyJs来合并和压缩文件

 1 var fs = require(‘fs‘);
 2 var jsp = require("./UglifyJS-master/uglify-js").parser;
 3 var pro = require("./UglifyJS-master/uglify-js").uglify;
 4 var finalCode=‘‘;
 5 function jsMinifier(flieIn) {
 6     var flieIn=Array.isArray(flieIn)? flieIn : [flieIn];
 7     var origCode,ast;
 8 
 9     var getAllFiles = function (dir) {
10         var filesArr = fs.readdirSync(dir);
11         for(var j = 0; j < filesArr.length; j++) {
12             var isDir = fs.lstatSync(dir+‘/‘+filesArr[j]);
13             if(isDir.isDirectory()){
14                 getAllFiles(dir+‘/‘+filesArr[j]);
15             }else {
16                 readFile(dir+‘/‘+filesArr[j]);
17             }
18         }
19     }
20      function readFile(filename){
21         origCode = fs.readFileSync(filename, ‘utf8‘);
22         ast = jsp.parse(origCode);
23         ast = pro.ast_mangle(ast);
24         ast= pro.ast_squeeze(ast); 
25         finalCode +=‘;‘+ pro.gen_code(ast);
26      }
27      for(var i=0; i<flieIn.length; i++) {
28         var isDir = fs.lstatSync(flieIn[i]);
29         if(isDir.isDirectory()) {
30             //为目录，获取目录下所有的文件。
31             getAllFiles(flieIn[i]);
32         }else {
33             readFile(flieIn[i]);
34         }
35     } 
36 }
37 jsMinifier(process.argv[2]);
38 fs.writeFileSync(process.argv[3], finalCode, ‘utf8‘);