Setup for auto reload (livereload) changes of coffeescript in hexo

Gruntfile.coffee

module.exports = ->
 
  @initConfig

    watch:
      sourceFiles:
        options: 
          livereload: true
        files: ['themes/**','scaffolds/**','scripts/**','source/**','!source/**/site.coffee','app.js']
        tasks: ['shell:hexoGen']
      coffee:
        options: 
          livereload: true
        files: ['source/**/site.coffee']
        tasks: ['shell:clean_coffee', 'shell:hexoGen']

    shell:
      hexoGen:
          command: 'hexo generate'
      clean:
        command: 'rm -rf public'
      clean_coffee:
        command: 'rm public/scripts/site.js'
    connect:
        server:
            options:
                base: 'public'
                hostname: '*'
                livereload: true
  
  @loadNpmTasks 'grunt-shell'
  @loadNpmTasks 'grunt-contrib-watch'
  @loadNpmTasks 'grunt-contrib-connect'
  @loadNpmTasks 'grunt-shell'
  @registerTask 'default', ['connect', 'watch']