grunt 插件

一个简单的 grunt 插件， 作用是 把 css 文件中的  /images/  替换成指定的  url path， 以实现 图片 cdn 路劲改造

插件项目文件结构

grunt-contrib-staticpath
|--tasks
|----staticpath.js
|--package.json

package.json

{
  "name": "grunt-contrib-staticpath",
  "version": "1.0.2",
  "description": "A grunt plugin to help front engineer replacing public static path of css.",
  "main": "tasks/staticpath.js",
  "scripts": {
    "test": "echo \"Error: no test specified\" && exit 1"
  },
  "repository": {
    "type": "git",
    "url": "git@192.168.1.22:node/grunt-contrib-staticpath.git"
  },
  "keywords": [
    "grunt-contrib-staticpath"
  ],
  "author": "ecalf",
  "license": "ISC"
}

staticpath.js

var
path = require('path');

module.exports = function (grunt) {
    "use strict";

    grunt.registerMultiTask('publicPath', 'Replace publicPath of image and update the CSS file.', function () {
        var done = this.async();

        var options = this.options({
            imagepath:"/images/",
            imagepathPublic:"//node-img.b0.upaiyun.com/wmzy-pc/images/"
        });

        //console.log("options>>>",options);
        //console.log("this.files>>>",this.files)

        function replaceCSSImagesPath(cssData){
            var oldPath = options.imagepath;
            var newPath = options.imagepathPublic;

            var reg = new RegExp('url\\(\\s*([\\\'\\\"])?'+oldPath,'gi');
            //console.log("todo reg:",reg)
            cssData = cssData.replace(reg,'url($1'+newPath);
            //console.log("done cssData.replace");
            //console.log('indexOf ',newPath,': ',cssData.indexOf(newPath));
            return cssData
        }

        function donePathReplace(cssData, destCSS){
            grunt.file.write(destCSS, cssData);
            grunt.log.writelns(('Done! [Replace publicPath of image, Created] -> ' + destCSS));
        }

        function staticPathIterator(file, callback){
            var src = file.src[0];
            var fileName = path.basename(src, '.css');

            var destCSS = file.dest;
            var cssData = grunt.file.read(src);
            var newCssData = replaceCSSImagesPath(cssData);

            donePathReplace(newCssData, destCSS);
            callback(null);
        }

        grunt.util.async.forEachSeries(this.files, staticPathIterator, function(success){
            done(success);
        });
    });
};

使用时在 Gruntfile.js 中的配置

publicPath:{
            options:{
                imagepath:"/images/",
                imagepathPublic:"//node-img.b0.upaiyun.com/wmzy-pc/images/"
            },
            autoPublicPath:{
                files: [
                    {
                        expand: true,
                        cwd: "public/src/css/",
                        src: "**/*.css",
                        dest: "public/src/css/"
                    }
                ]
            }

        },

用法：

grunt.loadNpmTasks('grunt-contrib-staticpath');

//test task
grunt.registerTask('test',["publicPath"]);