如果项目中有多个文件,如何使用Grunt为LESS配置sourceMaps?

时间:2014-02-17 18:16:20

标签: less gruntjs source-maps

我有多个.less文件,我想要处理它们匹配的.css,每个文件的sourceMaps都在与源相同的文件夹中。

这有多难?

我没有任何问题,直接用较少但不能解决如何在grunt-contrib-less中执行此操作,因为它似乎希望sourceMapFilename是单个硬编码值。

这是我的gruntfile:

module.exports = function(grunt) {
grunt.initConfig({
pkg: grunt.file.readJSON("package.json"),
watch: {
  options: {
    livereload: true,
  },
  css: {
    files: ['./core/theme/**/*.less'],
    tasks: ['less'],
    options: {
      spawn: false
    },
  },
},
less: {
  all: {
    src: ['./core/theme/**/*.less'],
    expand: true,  
    dest: "./core/theme/",
    options:{sourceMap:true},
rename:function (dest, src) {
        return src.substring(0, src.lastIndexOf('.'))+'.css';
    }
  },
}   
});
// on watch events configure less:all to only run on changed file
grunt.event.on('watch', function(action, filepath) {
  grunt.config('less.all.src', filepath);
});

grunt.loadNpmTasks("grunt-contrib-watch");
grunt.loadNpmTasks("grunt-contrib-less");

grunt.registerTask("default", ["less"]);
};

TIA

2 个答案:

答案 0 :(得分:1)

您可以定义多个目标。每个目标编译一个特定的较少文件。 假设您有一个合理/有限的较少文件列表要编译(< 10?)。 http://gruntjs.com/configuring-tasks#task-configuration-and-targets

定义常见的任务级选项(减少编译选项),然后定位特定选项(sourceMapFilename& sourceMapURL)。 http://gruntjs.com/configuring-tasks#options

我不确定如何动态设置sourceMapFilename,但我稍后会对此进行研究。如果您正在编译许多LESS文件(> 10?),那将是必要的。

答案 1 :(得分:0)

目前grunt-contrib-less没有这样的选项,请参阅:https://github.com/gruntjs/grunt-contrib-less/issues/89

您可以使用grunt.file获取较少文件的列表,而不是自动生成每个文件的任务,另请参阅:Compile LESS to multiple CSS files, based on variable value

<强> Gruntfile.js:

module.exports = function (grunt) {
  'use strict';
grunt.initConfig({
      pkg: grunt.file.readJSON('package.json'),
});

var allTaskArray = [];
var tasks = {};

grunt.file.recurse('less/', function(abspath, rootdir, subdir, filename)
{
    if(filename.match(/\.less$/g)){
        var name = filename.substring(0, filename.lastIndexOf('.'));
        tasks[name] = {options: {sourceMap:true},files:{} };
        tasks[name]['options']['sourceMapFilename'] = 'dist/' + name + '.map.css';
        tasks[name]['files']['dist/' + name + '.css'] = abspath;
        allTaskArray.push('less:' + name);
    }

});
grunt.loadNpmTasks('grunt-contrib-less');
grunt.config('less',tasks);
grunt.registerTask( 'default', allTaskArray );  
}; 

当你的文件结构如下所示:

less
├── less2
│   └── main2.less
└── main.less

运行grunt将导致:

Running "less:main2" (less) task
File dist/main2.map.css created.
File dist/main2.css created: 24 B → 66 B

Running "less:main" (less) task
File dist/main.map.css created.
File dist/main.css created: 24 B → 65 B

请注意,您还可以动态添加监视任务,如下所示:

grunt.loadNpmTasks('grunt-contrib-watch');
var watch = {
  options: {
    livereload: true,
  },
  css: {
    files: ['./less/**/*.less'],
    tasks: [],
    options: {
      spawn: false
    },
  }
};
watch['css']['tasks'] = allTaskArray;
grunt.config('watch',watch);