Gruntjs Grunt with postsss不会读取和打印文件夹“中的文件”；src"；至；“目的地”；

我安装了grunt PostCs和autoprefixer插件，但当我尝试使用插件“”的方法配置PostCs、autoprefixer和其他插件时，什么也不做，也没有allert或error

这是控制台的输出：

$ grunt postcss
Running "postcss:postcss" (postcss) task
Done.

当我以标准方式配置grunt时，它工作正常。

这是我的postss.js文件，放在grunt文件夹中：

module.exports = {
  postcss: {
    options: {
      processors: [
        require('autoprefixer')(),
      ]
    },
    dist: {
      src: '<%= project.stylesheets %>/src/main.css',
      dest: '<%= project.stylesheets %>/dest/main.css'
    }
  }
};

或者此命令行$grunt postsss--verbose，console将显示以下内容：

Running "postcss:postcss" (postcss) task
[D] Task source: /Users/mario.montalto/Progetti/start-web-site/frontend/node_modules/grunt-postcss/tasks/postcss.js
Done.

$ grunt postcss --verbose
Initializing
Command-line options: --verbose

Reading "Gruntfile.js" Gruntfile...OK

Registering Gruntfile tasks.
Initializing config...OK

Registering "grunt-bowercopy" local Npm module tasks.
Reading /Users/mario.montalto/Progetti/start-web-site/frontend/node_modules/grunt-bowercopy/package.json...OK
Parsing /Users/mario.montalto/Progetti/start-web-site/frontend/node_modules/grunt-bowercopy/package.json...OK
Reading bower.json...OK
Parsing bower.json...OK
Loading "bowercopy.js" tasks...OK
+ bowercopy

Registering "grunt-contrib-sass" local Npm module tasks.
Reading /Users/mario.montalto/Progetti/start-web-site/frontend/node_modules/grunt-contrib-sass/package.json...OK
Parsing /Users/mario.montalto/Progetti/start-web-site/frontend/node_modules/grunt-contrib-sass/package.json...OK
Loading "sass.js" tasks...OK
+ sass

Registering "grunt-contrib-watch" local Npm module tasks.
Reading /Users/mario.montalto/Progetti/start-web-site/frontend/node_modules/grunt-contrib-watch/package.json...OK
Parsing /Users/mario.montalto/Progetti/start-web-site/frontend/node_modules/grunt-contrib-watch/package.json...OK
Loading "watch.js" tasks...OK
+ watch

Registering "grunt-modernizr" local Npm module tasks.
Reading /Users/mario.montalto/Progetti/start-web-site/frontend/node_modules/grunt-modernizr/package.json...OK
Parsing /Users/mario.montalto/Progetti/start-web-site/frontend/node_modules/grunt-modernizr/package.json...OK
Loading "modernizr.js" tasks...OK
+ modernizr

Registering "grunt-postcss" local Npm module tasks.
Reading /Users/mario.montalto/Progetti/start-web-site/frontend/node_modules/grunt-postcss/package.json...OK
Parsing /Users/mario.montalto/Progetti/start-web-site/frontend/node_modules/grunt-postcss/package.json...OK
Loading "postcss.js" tasks...OK
+ postcss

Registering "grunt-slim" local Npm module tasks.
Reading /Users/mario.montalto/Progetti/start-web-site/frontend/node_modules/grunt-slim/package.json...OK
Parsing /Users/mario.montalto/Progetti/start-web-site/frontend/node_modules/grunt-slim/package.json...OK
Loading "slim.js" tasks...OK
+ slim
Loading "Gruntfile.js" tasks...OK
+ default

Running tasks: postcss

Running "postcss" task

Running "postcss:postcss" (postcss) task
Verifying property postcss.postcss exists in config...OK
File: [no files]
Options: processors=[null], map, diff=false, safe=false, failOnError=false, writeDest

Done.

你不知道怎么解决它

谢谢你的帮助

马里奥