我正在尝试使用Yeoman的generator-webapp制作的Sass Bootstrap脚手架来配置grunt-uncss。我发现这个讨论与我尝试做的很接近：https://github.com/addyosmani/grunt-uncss/issues/75
我尝试更改并将其应用于我的情况，但Grunt给了我以下错误：
...
Running "uncss:dist" (uncss) task
File .tmp/styles/main.css created: 121.77 kB → 7.24 kB
Running "cssmin:dist" (cssmin) task
File dist/styles/main.css created: 7.24 kB → 4.8 kB
Running "cssmin:generated" (cssmin) task
>> Destination not written because minified CSS was empty.
File dist/styles/main.css created: 121.77 kB → 96.74 kB
...
Gruntfile.js
// Generated on 2014-06-16 using generator-webapp 0.4.9
'use strict';
// # Globbing
// for performance reasons we're only matching one level down:
// 'test/spec/{,*/}*.js'
// use this if you want to recursively match all subfolders:
// 'test/spec/**/*.js'
module.exports = function (grunt) {
// Load grunt tasks automatically
require('load-grunt-tasks')(grunt);
// Time how long tasks take. Can help when optimizing build times
require('time-grunt')(grunt);
// Configurable paths
var config = {
app: 'app',
dist: 'dist'
};
// Define the configuration for all the tasks
grunt.initConfig({
// Project settings
config: config,
// Watches files for changes and runs tasks based on the changed files
watch: {
bower: {
files: ['bower.json'],
tasks: ['bowerInstall']
},
js: {
files: ['<%= config.app %>/scripts/{,*/}*.js'],
tasks: ['jshint'],
options: {
livereload: true
}
},
jstest: {
files: ['test/spec/{,*/}*.js'],
tasks: ['test:watch']
},
gruntfile: {
files: ['Gruntfile.js']
},
sass: {
files: ['<%= config.app %>/styles/{,*/}*.{scss,sass}'],
tasks: ['sass:server', 'autoprefixer']
},
styles: {
files: ['<%= config.app %>/styles/{,*/}*.css'],
tasks: ['newer:copy:styles', 'autoprefixer']
},
livereload: {
options: {
livereload: '<%= connect.options.livereload %>'
},
files: [
'<%= config.app %>/{,*/}*.html',
'.tmp/styles/{,*/}*.css',
'<%= config.app %>/images/{,*/}*'
]
}
},
// The actual grunt server settings
connect: {
options: {
port: 9000,
open: true,
livereload: 35729,
// Change this to '0.0.0.0' to access the server from outside
hostname: '0.0.0.0'
},
livereload: {
options: {
middleware: function(connect) {
return [
connect.static('.tmp'),
connect().use('/bower_components', connect.static('./bower_components')),
connect.static(config.app)
];
}
}
},
test: {
options: {
open: false,
port: 9001,
middleware: function(connect) {
return [
connect.static('.tmp'),
connect.static('test'),
connect().use('/bower_components', connect.static('./bower_components')),
connect.static(config.app)
];
}
}
},
dist: {
options: {
base: '<%= config.dist %>',
livereload: false
}
}
},
// Empties folders to start fresh
clean: {
dist: {
files: [{
dot: true,
src: [
'.tmp',
'<%= config.dist %>/*',
'!<%= config.dist %>/.git*'
]
}]
},
server: '.tmp'
},
// Make sure code styles are up to par and there are no obvious mistakes
jshint: {
options: {
jshintrc: '.jshintrc',
reporter: require('jshint-stylish')
},
all: [
'Gruntfile.js',
'<%= config.app %>/scripts/{,*/}*.js',
'!<%= config.app %>/scripts/vendor/*',
'test/spec/{,*/}*.js'
]
},
// Mocha testing framework configuration options
mocha: {
all: {
options: {
run: true,
urls: ['http://<%= connect.test.options.hostname %>:<%= connect.test.options.port %>/index.html']
}
}
},
// Compiles Sass to CSS and generates necessary files if requested
sass: {
options: {
includePaths: [
'bower_components'
]
},
dist: {
files: [{
expand: true,
cwd: '<%= config.app %>/styles',
src: ['*.scss'],
dest: '.tmp/styles',
ext: '.css'
}]
},
server: {
files: [{
expand: true,
cwd: '<%= config.app %>/styles',
src: ['*.scss'],
dest: '.tmp/styles',
ext: '.css'
}]
}
},
// Add vendor prefixed styles
autoprefixer: {
options: {
browsers: ['last 1 version']
},
dist: {
files: [{
expand: true,
cwd: '.tmp/styles/',
src: '{,*/}*.css',
dest: '.tmp/styles/'
}]
}
},
// Automatically inject Bower components into the HTML file
bowerInstall: {
app: {
src: ['<%= config.app %>/index.html'],
exclude: ['bower_components/bootstrap-sass-official/vendor/assets/javascripts/bootstrap.js']
},
sass: {
src: ['<%= config.app %>/styles/{,*/}*.{scss,sass}']
}
},
// Renames files for browser caching purposes
rev: {
dist: {
files: {
src: [
'<%= config.dist %>/scripts/{,*/}*.js',
'<%= config.dist %>/styles/{,*/}*.css',
'<%= config.dist %>/images/{,*/}*.*',
'<%= config.dist %>/styles/fonts/{,*/}*.*',
'<%= config.dist %>/*.{ico,png}'
]
}
}
},
// Reads HTML for usemin blocks to enable smart builds that automatically
// concat, minify and revision files. Creates configurations in memory so
// additional tasks can operate on them
useminPrepare: {
options: {
dest: '<%= config.dist %>'
},
html: '<%= config.app %>/index.html'
},
// Performs rewrites based on rev and the useminPrepare configuration
usemin: {
options: {
assetsDirs: ['<%= config.dist %>', '<%= config.dist %>/images']
},
html: ['<%= config.dist %>/{,*/}*.html'],
css: ['<%= config.dist %>/styles/{,*/}*.css']
},
// The following *-min tasks produce minified files in the dist folder
imagemin: {
dist: {
files: [{
expand: true,
cwd: '<%= config.app %>/images',
src: '{,*/}*.{gif,jpeg,jpg,png}',
dest: '<%= config.dist %>/images'
}]
}
},
svgmin: {
dist: {
files: [{
expand: true,
cwd: '<%= config.app %>/images',
src: '{,*/}*.svg',
dest: '<%= config.dist %>/images'
}]
}
},
htmlmin: {
dist: {
options: {
collapseBooleanAttributes: true,
collapseWhitespace: true,
removeAttributeQuotes: true,
removeCommentsFromCDATA: true,
removeEmptyAttributes: true,
removeOptionalTags: true,
removeRedundantAttributes: true,
useShortDoctype: true
},
files: [{
expand: true,
cwd: '<%= config.dist %>',
src: '{,*/}*.html',
dest: '<%= config.dist %>'
}]
}
},
// By default, your `index.html`'s <!-- Usemin block --> will take care of
// minification. These next options are pre-configured if you do not wish
// to use the Usemin blocks.
// cssmin: {
// dist: {
// files: {
// '<%= config.dist %>/styles/main.css': [
// '.tmp/styles/{,*/}*.css',
// '<%= config.app %>/styles/{,*/}*.css'
// ]
// }
// }
// },
// uglify: {
// dist: {
// files: {
// '<%= config.dist %>/scripts/scripts.js': [
// '<%= config.dist %>/scripts/scripts.js'
// ]
// }
// }
// },
// concat: {
// dist: {}
// },
// Copies remaining files to places other tasks can use
copy: {
dist: {
files: [{
expand: true,
dot: true,
cwd: '<%= config.app %>',
dest: '<%= config.dist %>',
src: [
'*.{ico,png,txt}',
'.htaccess',
'images/{,*/}*.webp',
'{,*/}*.html',
'styles/fonts/{,*/}*.*'
]
}, {
expand: true,
dot: true,
cwd: '.',
src: ['bower_components/bootstrap-sass-official/vendor/assets/fonts/bootstrap/*.*'],
dest: '<%= config.dist %>'
}]
},
styles: {
expand: true,
dot: true,
cwd: '<%= config.app %>/styles',
dest: '.tmp/styles/',
src: '{,*/}*.css'
}
},
// Run some tasks in parallel to speed up build process
concurrent: {
server: [
'sass:server',
'copy:styles'
],
test: [
'copy:styles'
],
dist: [
'sass',
'copy:styles',
'imagemin',
'svgmin'
]
},
autoshot: {
dist: {
options: {
path: 'screenshots/',
remote : {
files: [
{ src: 'http://localhost:<%= connect.options.port %>', dest: 'app.jpg'}
]
},
viewport: ['320x480','480x320','384x640','640x384','602x963','963x602','600x960','960x600','800x1280','1280x800','768x1024','1024x768']
}
}
},
uncss: {
dist: {
options: {
stylesheets: ['../.tmp/styles/main.css']
},
files: {
'.tmp/styles/main.css': ['app/index.html']
}
}
}
});
grunt.registerTask('serve', function (target) {
if (target === 'dist') {
return grunt.task.run(['build', 'connect:dist:keepalive']);
}
grunt.task.run([
'clean:server',
'concurrent:server',
'autoprefixer',
'connect:livereload',
'watch'
]);
});
grunt.registerTask('server', function (target) {
grunt.log.warn('The `server` task has been deprecated. Use `grunt serve` to start a server.');
grunt.task.run([target ? ('serve:' + target) : 'serve']);
});
grunt.registerTask('test', function (target) {
if (target !== 'watch') {
grunt.task.run([
'clean:server',
'concurrent:test',
'autoprefixer'
]);
}
grunt.task.run([
'connect:test',
'mocha'
]);
});
grunt.registerTask('build', [
'clean:dist',
'useminPrepare',
'concurrent:dist',
'autoprefixer',
'concat',
'uncss',
'cssmin',
'uglify',
'copy:dist',
'rev',
'usemin',
'htmlmin'
]);
grunt.registerTask('default', [
'newer:jshint',
'test',
'build'
]);
grunt.registerTask('screenshots', [
'clean:server',
'concurrent:server',
'connect:livereload',
'autoshot'
]);
grunt.registerTask('build-uncss', [
'build',
'uncss'
]);
};
我理解这是与＃34; grunt＆＃34;一起运行的所有grunt任务的事件顺序的问题，但是我无法找到打破这个过程的点。我在这里缺少什么？
答案 0 :(得分：1)
对于这种特殊情况，改变：
files: { '.tmp/styles/main.css': ['app/index.html'] }
为...
files: { '.tmp/concat/styles/main.css': ['app/index.html'] }
tmp: '.tmp'添加到var config = {...} 后
var config = {
app: 'app',
dist: 'dist',
tmp: '.tmp'
};
解决了这个问题。
“dist”now文件夹包含一个缩小的，修订过的和未加载的样式表。正是我需要的。
答案 1 :(得分：0)
在尝试解决同一问题时遇到了这个问题。如果其他人仍然面临这种情况，index.html中的usemin块会覆盖cssmin grunt任务，即
<!-- build:css({.tmp,client}) styles/main.css -->
<link rel="stylesheet" href="styles/main.css" media="all" type='text/css'>
<!-- endbuild -->
删除＆＃34; build＆＃34;评论，离开：
<link rel="stylesheet" href="styles/main.css" media="all" type='text/css'>
在Gruntfile.js中配置cssmin任务。对我来说，由于有多个样式表，我还必须重写我的concat任务。
我的样本：
cssmin: {
generated: {
files: {
'<%= yeoman.dist %>/styles/main.css': [
'.tmp/concat/styles/{,*/}*.css'
]
}
}
},
concat: {
css: {
files: {
'.tmp/concat/styles/main.css': ['.tmp/styles/{,*/}*.css']
}
}
},
uncss: {
dist: {
files: {
'.tmp/concat/styles/main.css': ['<%= yeoman.app %>/*.html', '<%= yeoman.app %>/views/**/*.html']
},
options: {
stylesheets: ['../.tmp/concat/styles/main.css']
}
}
}
如果你只有一个main.css，请忽略＆＃39; concat＆＃39;文件路径的任务和concat前缀。
构建任务：
grunt.registerTask('build', [
'clean:dist',
'wiredep',
'useminPrepare',
'concurrent:dist',
'autoprefixer',
'concat',
'ngAnnotate',
'copy:dist',
'cdnify',
'uncss',
'cssmin',
'uglify',
'filerev',
'usemin',
'htmlmin'
]);
不确定这是否是最佳方式，希望这有助于某人！
答案 2 :(得分：-1)
Addy Osmani, author of the grunt-uncss plugin, has written a yeoman generator incorporating the plugin.
$ yo webapp-uncss