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grunt-file-modify

v0.2.1

Published

modify file content.

Downloads

8

Readme

grunt-file-modify

modify file content.

Getting Started

This plugin requires Grunt ~0.4.5

If you haven't used Grunt before, be sure to check out the Getting Started guide, as it explains how to create a Gruntfile as well as install and use Grunt plugins. Once you're familiar with that process, you may install this plugin with this command:

npm install grunt-file-modify --save-dev

Once the plugin has been installed, it may be enabled inside your Gruntfile with this line of JavaScript:

grunt.loadNpmTasks('grunt-file-modify');

The "file_modify" task

Overview

In your project's Gruntfile, add a section named file_modify to the data object passed into grunt.initConfig().

grunt.initConfig({
  file_modify: {
    options: {
      // Task-specific options go here.
    },
    your_target: {
      // Target-specific file lists and/or options go here.
    },
  },
});

Options

同时支持 options.regoptions.templateoptions.process,对文件内容的处理顺序依次为 options.templateoptions.regoptions.process。但必须要有其中一种,否则将对文件不做任何处理。

options.reg

Type: Object Default value: null 支持使用正则表达式快速替换,这样就可以避免在 options.process 这个方法里面定义了,更简单。options.reg 有三个参数:

  • pattern :用于生成正则表达式的字符串,详见 RegExp
  • flags :正则表达式的参数,必须是 gim 其中之一或任意组合,详见 RegExp,不过此参数可以不写,默认为 gi
  • replaceStr :要替换的字符串,此参数如果不写,则默认为空字符串

其用法:

options: {
    reg: {
        pattern: 'world',
        flags: 'gi', //可以省略,默认值为'gi'
        replaceStr: 'grunt-file-modify'
    },
}

其等效于定义:

options: {
    process: function(content, srcpath) {
        //return content.replace(new RegExp(pattern, flags), replaceStr);
        return content.replace(new RegExp('world', 'gi'), 'grunt-file-modify');
    }
}

options.template

Type: Object Default value: null 支持模版替换,核心算法是采用 underscore_.template 方法,其中 src 文件为模版,而数据则由 options.template.data 传入。options.template 有一个参数:

  • data :模版的数据,ObjectString 类型。如果是 String,则会认为其是文件路径,会请求这个文件,将其转换为JSON,因此该文件务必符合JSON格式的文件。

其用法:

options: {
    template: {
        data: {
            listName: 'student',
            detail: [{
                name: 'LiLei',
                sex: 'male',
                age: 15
            }, {
                name: 'HanMeimei',
                sex: 'female',
                age: 15
            }, {
                name: 'Jim',
                sex: 'male',
                age: 16
            }]
        }
    }
}

或者:

options: {
    template: {
        data: 'tmp/data.json'
    }
},

options.process

Type: Function(content, srcpath)

options.process 将被传递给 grunt.file.copy ,用于控制哪些内容可以被拷贝(保存)。该函数需要返回一个新的文件的内容

  • content : 该文件的原始内容,可以通过修改 content 从而获得新的文件内容
  • srcpath : 该文件先对与Gruntfile.js的路径

Usage Examples

自定义方法修改文件内容

在下面的例子中,我们将去掉包含了 “//@debug” 的行的内容。为什么需要这么做?因为很多时候我们在调试时需要打印各种内容,但构建发布版本时,我们就需要移除这些代码。使用单行注释中增加“//@debug”的标志,就能够使得我们能够更灵活控制哪些代码是需要在发布版本中删除的。

grunt.initConfig({
  file_modify: {
    options: {
        process: function (content, srcpath) {
            /**
             * 去掉包含了 “//@debug” 的行的内容,例如下面这一行因为包含了@debug,则该行内容将被替换为空白
             * console.log(s1); // @debug remove this line, too!
             */
            return content.replace(/[^\n]+\/\/\s*@\s*debug.*/g, '');
        }
    },
    src: ['tmp/options_process.js']
  },
});

Release History

2015.11.24 v0.2.1 Modify readme.md

2015.11.24 v0.2.0 Support options.reg(#1) and options.template(#2) .

2015.11.23 v0.1.0 Support options.process to modify file content.

2015.11.23 v0.0.1 Init.