通过咕噜任务更新一个JSON文件文件引用 [英] Updating file references in a json file via a grunt task

问题描述

我是一名JavaScript开发人员和相当新的从头开始创建构建过程。我选择使用咕噜我目前的项目，并创建了一个GruntFile，做什么，我需要做的约90％，除了这一个问题，它的伟大工程。我有我而我开发的的manifest.json 文件浏览器扩展程序引用了几个JavaScript文件。对于我的构建过程中，我连接所有这些文件，并将其与缩小成一个文件被列入的manifest.json 。反正在生成过程中，以更新的manifest.json 文件的文件引用，使其指向缩小的版本？

I'm a JavaScript developer and fairly new to creating a build process from scratch. I chose to use Grunt for my current project and have created a GruntFile that does about 90% of what I need it to do and it works great, except for this one issue. I have several JavaScript files that I reference while I'm developing a chrome extension in the manifest.json file. For my build process I am concatenating all of these files and minifying it into one file to be included in manifest.json. Is there anyway to update the file references in the manifest.json file during the build process so it points to the minified version?

下面是SRC清单文件的一个片段：

Here is a snippet of the src manifest file:

{
    "content_scripts": [{
        "matches": [
            "http://*/*"
        ],
        "js": [
            "js/lib/zepto.js",
            "js/injection.js",
            "js/plugins/plugin1.js",
            "js/plugins/plugin2.js",
            "js/plugins/plugin3.js",
            "js/injection-init.js"
        ]
    }],
    "version": "2.0",
}

我上面列出到名为 injection.js 一个文件连接在一起，minifies所有js文件咕噜任务，想一个咕噜的任务，可以修改清单文件所以它看起来是这样的：

I have a grunt task that concatenates and minifies all the js files listed above into one file called injection.js and would like a grunt task that can modify the manifest file so it looks like this:

{
    "content_scripts": [{
        "matches": [
            "http://*/*"
        ],
        "js": [
            "js/injection.js"
        ]
    }],
    "version": "2.0",
}

我已经完蛋了，现在是有2个版本的清单文件，一个用于开发，一个用于构建，在构建过程中，它会将内部版本代替。这意味着我需要保持2个版本，我宁愿不做。反正是有与步兵更优雅做到这一点？

What I've done for now is have 2 versions of the manifest file, one for dev and one for build, during the build process it copies the build version instead. This means I need to maintain 2 versions which I'd rather not do. Is there anyway to do this more elegantly with Grunt?

推荐答案

步兵给出了自己的API，用于读取和写入文件，我觉得比其他依赖更好的像 FS ：
使用咕噜用命令编辑/更新JSON文件咕噜updatejson：键：值把这个任务在你gruntjs文件后，

Grunt gives its own api for reading and writing files, i feel that better than other dependencies like fs: Edit/update json file using grunt with command grunt updatejson:key:value after putting this task in your gruntjs file

grunt.registerTask('updatejson', function (key, value) {
        var projectFile = "path/to/json/file";


        if (!grunt.file.exists(projectFile)) {
            grunt.log.error("file " + projectFile + " not found");
            return true;//return false to abort the execution
        }
        var project = grunt.file.readJSON(projectFile);//get file as json object

        project[key]= value;//edit the value of json object, you can also use projec.key if you know what you are updating

        grunt.file.write(projectFile, JSON.stringify(project, null, 2));//serialize it back to file

    });

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