如何使用Grunt为LESS配置sourceMaps？

Question

我正在使用grunt 0.4.2和grunt-contrib-less 0.9.0.我希望将LESS编译成支持源映射的CSS.

我的LESS文件在public/less,并且主要文件被调用main.less.

编译public/less/main.less成public/css/main.css工作,但源地图不起作用.

我的Grunt配置有什么问题？

{
    less: {
        dev: {
            options: {
                compress: true,
                yuicompress: true,
                optimization: 2,
                sourceMap: true,
                sourceMapFilename: "public/css/main.css.source-map.json", //Write the source map to a separate file with the given filename.
                sourceMapBasepath: "public/less", //Sets the base path for the Less file paths in the source map.
                sourceMapRootpath: "/"//Adds this path onto the Less file paths in the source map.
            },
            files: {
                "public/css/main.css": "public/less/main.less"
            }
        }
    },
    watch: {
        styles: {
            files: ["public/less/*"],
            tasks: ['less'],
            options: {
                livereload: true,
                nospaces: true
            }
        }
    }
}

我不想在我的/public/less文件夹中创建我的CSS ; 我想把它放进去/public/css.否则,我可以使用这个其他配置,它的工作原理:

{
    less: {
        dev: {
            options: {
                compress: true,
                yuicompress: true,
                optimization: 2,
                sourceMap: true,
                sourceMapFilename: "public/less/main.css.map", //I DO NOT WANT THE CSS MAP HERE
                sourceMapBasepath: "public/less", //Sets the base path for the Less file paths in the source map.
            },
            files: {
                "public/less/main.css": "public/less/main.less"//I DO NOT WANT THE CSS HERE
            }
        }
    },
    watch: {
        styles: {
            files: ["public/less/*"],
            tasks: ['less'],
            options: {
                livereload: true,
                nospaces: true
            }
        }
    }
}

Answer 1

我发现LESS站点文档对于grunt-contrib-less使用的params更加清晰.

LESS:命令行用法 http://lesscss.org/usage/#command-line-usage-installing-lessc

NPM:grunt-contrib-less https://www.npmjs.org/package/grunt-contrib-less

文件结构:

laravel/gruntfile.js
laravel/public/less/main.less
laravel/public/css/main.css
laravel/public/css/main.css.map

文件'main.css.map'注意:

• 如果您愿意,可以重命名为:main.css.source-map.json
• 我猜你有一些服务器规则设置,不能从'css'文件夹正确地服务*.map文件

压缩说明:

• cleancss:true =将从main.css中删除sourceMappingURL注释
• yuicompress:true =不会从main.css中删除sourceMappingURL注释

Gruntfile.js

less: {
    dev: {
        options: {
            compress: true,
            yuicompress: true,
            optimization: 2,
            sourceMap: true,
            sourceMapFilename: 'public/css/main.css.map', // where file is generated and located
            sourceMapURL: '/css/main.css.map', // the complete url and filename put in the compiled css file
            sourceMapBasepath: 'public', // Sets sourcemap base path, defaults to current working directory.
            sourceMapRootpath: '/', // adds this path onto the sourcemap filename and less file paths
        },
        files: {
            'public/css/main.css': 'public/less/main.less',
        }
    }
},

watch: {
    styles: {
        files: ["public/less/*"],
        tasks: ['less'],
        options: {
            livereload: true,
            nospaces: true
        }
    }
},

laravel /公/ CSS/main.css的

.class{ compiled css here } /*# sourceMappingURL=/css/main.css.map */

laravel /公/ CSS/main.css.map

{"version":3,"sources":["/less/main.less"], etc...