boot2dockerコマンドの手抜き補完と環境変数($DOCKER_HOST)の自動設定

.zshrc

## boot2docker
if command -v boot2docker &>/dev/null; then
  if [ "$(boot2docker status 2> /dev/null)" = 'running' ]; then
    export DOCKER_HOST=tcp://$(boot2docker ip 2>/dev/null):2375
  fi

  compdef _boot2dockercmd boot2docker_wrapper
  function _boot2dockercmd {
    local -a cmds
    if (( CURRENT == 2 ));then
      cmds=('init' 'destroy' 'up' 'start' 'save' 'stop' 'download' 'pause' 'restart' 'status' 'info' 'delete' 'ssh')
      _describe -t commands "subcommand" cmds
    else
      _files
    fi
    return 1;
  }

  function boot2docker_wrapper() {
    if [ $1 = 'up' ]; then
      shift
      \boot2docker up $@ && export DOCKER_HOST=tcp://$(boot2docker ip 2>/dev/null):2375
    else
      \boot2docker $@
    fi
  }

  alias boot2docker=boot2docker_wrapper
fi