用nodejs寫的一個簡單項目打包工具

2019-11-20 22:43:26

字體：大中小

供稿：網(wǎng)友

項目的模塊加載和定義部分代碼是這樣的：

XX.define('ns',['tool/cookie'],function(){
});
//或者
XX.define('ns.ns2','tool/cookie,tool/abc',function(){
})
//或者
XX.define('ns',function(){
})

所用到的js打包工具就是掃描文件，然后匹配出來需要加載的模塊，然后先加載模塊代碼。
主要的nodejs打包工具代碼如下：

復(fù)制代碼代碼如下:

//通用模塊
var Util = require('util'),
    FS = require('fs'),
    getDeps = require('./getDeps'),
    Uglify = require('./uglify/uglify-js'),
    removeBOMChar = require('./removeBOM').removeBOMChar,
    PATH =require('path');

var packagedObj = {};//是否已經(jīng)打包過

module.exports = function(filePath, rootPath, opts){
    opts = opts || {};

    var str = jscombo(filePath,rootPath);
    if(opts.unzip){
        return str;
    }else{
        return Uglify(str);   
    }
};

function jscombo(filePaths, rootPath){
    if(Util.isArray(filePaths)){
        return filePaths.map(function(filePath){            
            filePath = PATH.join(rootPath,filePath);

            //只打包一次
            if(packagedObj[filePath]){
                return '';
            }
            packagedObj[filePath] = 1;

            //是否存在
            if(FS.existsSync(filePath)){
                //異步讀取內(nèi)容
                var str = FS.readFileSync(filePath, 'utf-8');
                //移出BOM頭
                str = removeBOMChar(str);
                var result = getDeps(str, rootPath);
                var content = result.content;
                content = '//'+filePath+'/n'+content;

                //遞歸打包
                if(result.list){
                    return jscombo(result.list, rootPath) + content;
                }                
                //返回內(nèi)容
                return content;
            }else{
                //文件不存在錯誤信息
                console.error('jsCombo Error: ' + filePath + ' does not exsist! the path is:'+rootPath);
                return ';alert("' + filePath + ' does not exsist!");';
            }            
        }).join(';/n');

    }else{
        return jscombo([filePaths],rootPath);
    }
}