Create the tasks

gistfile1.coffee

grunt.initConfig
  coffee:
    scripts:
      files: 
        grunt.file.expandMapping(['src/scripts/**/*.coffee'], 'blog/scripts/', 
          rename: (destBase, destPath) ->
            return destBase + destPath.slice(12, destPath.length)
            .replace(/\.coffee$/, '.js')
        )
    main:
      files:
        'blog/scripts/main.js': 'src/main.coffee'

  sass:
    options:
      compass: true
      style: 'compressed'
    compile:
      files:
        'blog/stylesheets/main.css': 'src/stylesheets/main.sass'

  haml:
    templates:
      compile:
        options:
          language: 'coffee'
          namespace: 'JST'
          target: 'js'
        files:
          grunt.file.expandMapping(['src/templates/**/*.haml'], 
            'blog/scripts/templates/',
            rename: (destBase, destPath) ->
              return destBase + destPath.slice(13, destPath.length)
              .replace(/\.haml$/, '.js')
          )
    index:
      compile:
        options:
          target: 'html'
      files:
        'blog/index.html': 'src/index.haml'