_rake_refresh () {
    if [ -f .rake_tasks ]; then
      rm .rake_tasks
    fi
    echo "Generating .rake_tasks..." > /dev/stderr
    _rake_generate
    cat .rake_tasks
  }
  
  _rake_does_task_list_need_generating () {

    [[ ! -f .rake_tasks ]] || [[ Rakefile -nt .rake_tasks ]]

  }
  
  _rake_generate () {
    rake --silent --tasks | cut -d " " -f 2 > .rake_tasks
  }
  
  _rake () {
    if [ -f Rakefile ]; then
      if _rake_does_task_list_need_generating; then
        echo "
  Generating .rake_tasks..." > /dev/stderr
        _rake_generate
      fi
      compadd `cat .rake_tasks`
    fi
  }
  
  compdef _rake rake
  alias rake_refresh='_rake_refresh'