ohmyzsh/plugins/capistrano/capistrano.plugin.zsh

function _cap_does_task_list_need_generating () {
  if [ ! -f .cap_tasks~ ]; then return 0;
  else
    accurate=$(stat -f%m .cap_tasks~)
    changed=$(stat -f%m config/deploy.rb)
    return $(expr $accurate '>=' $changed)
  fi
}

function _cap () {
  if [ -f config/deploy.rb ]; then
    if _cap_does_task_list_need_generating; then
      echo "\nGenerating .cap_tasks~..." > /dev/stderr
      cap --tasks | grep '#' | cut -d " " -f 2 > .cap_tasks~
    fi
    compadd `cat .cap_tasks~`
  fi
}

compdef _cap cap