nodejs 批量加水印

//引用文件系统模块
var fs = require("fs");
//引用imageinfo模块
var imageInfo = require("imageinfo");
//引用images模块
var images = require('images');
var watermarkImg = images('./水印.png');
var dir = '虾皮常用图';
fs.mkdirSync('./' + dir + '_加水印');
function readFileList(path, filesList) {
    var files = fs.readdirSync(path);
    files.forEach(function (itm, index) {
        var stat = fs.statSync(path + itm);
        if (stat.isDirectory()) {
            //递归读取文件
            readFileList(path + itm + "/", filesList)
        } else {
            var obj = {};//定义一个对象存放文件的路径和名字
            obj.path = path;//路径
            obj.filename = itm//名字
            filesList.push(obj);
        }
    })
}
var getFiles = {
    //获取文件夹下的所有文件
    getFileList: function (path) {
        var filesList = [];
        readFileList(path, filesList);
        return filesList;
    },
    //获取文件夹下的所有图片
    getImageFiles: function (path) {
        var imageList = [];
        this.getFileList(path).forEach((item) => {
            var ms = imageInfo(fs.readFileSync(item.path + item.filename));
            ms.mimeType && (imageList.push({ path: item.path + item.filename, name: item.filename }))
        });
        return imageList;
    }
};

//获取文件夹下的所有图片
var photos = getFiles.getImageFiles("./" + dir + "/");
for (var i = 0; i < photos.length; i++) {
    var sourceImg = images(photos[i].path);
    var sourceImgName = photos[i].name;
    var sWidth = sourceImg.width();
    var sHeight = sourceImg.height();
    var wmWidth = watermarkImg.width();
    var wmHeight = watermarkImg.height();


    images(sourceImg)
        // 设置绘制的坐标位置，右下角距离 40px
        .draw(watermarkImg, 0, 0)
        // 保存格式会自动识别
        .save('./' + dir + '_加水印/' + sourceImgName + '');
}