SRC文件为空

Question

我试图在我的项目中使用grunt-usemin来最小化JS和CSS文件，但它不起作用。所以我创建了一个简单的例子，就像grunt-usemin文档一样，它也不起作用。

我有一个简单的结构:

.
├── Gruntfile.js
├── dist
│   └── js
├── index.html
├── js
│   ├── bar.js
│   └── foo.js
└── package.json

在index.html我有以下块参考2个JS文件:

<!-- build:js js/optimized.js -->
<script src="/js/foo.js"></script>
<script src="/js/bar.js"></script>
<!-- endbuild -->

我Gruntfile.js

:

module.exports = function(grunt) {
// Project configuration.
  grunt.initConfig({
    pkg: grunt.file.readJSON('package.json'),
    useminPrepare: {
        html: 'index.html',
        options: {
          dest: 'dist'
        }
    },
    usemin: {
        html: ['index.html']
    },
    filerev: {
      options: {
        algorithm: 'md5',
        length: 8
      },
      js: {
        src: 'js/optimized.js',
        dest: 'js/'
      }
    }
  });
  grunt.loadNpmTasks('grunt-contrib-uglify');
  grunt.loadNpmTasks('grunt-contrib-cssmin');
  grunt.loadNpmTasks('grunt-contrib-concat');
  grunt.loadNpmTasks('grunt-filerev');
  grunt.loadNpmTasks('grunt-usemin');
  // Register tasks
  grunt.registerTask('deploy', ['useminPrepare', 'uglify:generated']);
// grunt.registerTask('deploy', ['useminPrepare', 'uglify:generated', 'usemin']);
};

当我运行grunt deploy -v时，我期望，js/optimized.js将被创建。但是我得到这个错误:

>> Destination dist/js/optimized.js not written because src files were empty.
>> No files created.

useminPrepare生成的任务如下:

Going through index.html to update the config
Looking for build script HTML comment blocks
Configuration is now:
  concat:
  { generated: 
   { files: 
      [ { dest: '.tmp/concat/js/optimized.js',
          src: [ 'js/foo.js', 'js/bar.js' ] } ] } }
  uglify:
  { generated: 
   { files: 
      [ { dest: 'dist/js/optimized.js',
          src: [ '.tmp/concat/js/optimized.js' ] } ] } }

有人能帮助我，为什么dist/js/optimized.js没有被创建?

谢谢!

Answer 1

Hmm问题是在grunt.registerTask('deploy', ['useminPrepare', 'uglify:generated']);。我忘了调用concat:generated.

所以解是:

grunt.registerTask('deploy', ['useminPrepare', 'concat:generated', 'uglify:generated']);