_aws() {
  case "$1" in
    -h|--help)
      echo "usage: _aws [version] [opts]"
    ;;
    -v|--version)
      echo "_aws version 0.0.19"
    ;;
    -*|--*)
      echo "Unknown option $1"
    ;;
    system)
      unset AWS_CREDENTIAL_FILE
    ;;
    "")
      for i in ${__aws_LIST}; do
        if [ "$i/credentials" = "$AWS_CREDENTIAL_FILE" ]
        then
          star='*'
        else
          star=' '
        fi
        echo " $star $(basename $i)"
      done
    ;;
    *)
      for i in ${__aws_LIST}; do
        if [ "$(basename $i)" = "$1" ]
        then
          export AWS_CREDENTIAL_FILE="$i/credentials"
          return 0
        fi
      done
      echo "_aws: unknown aws: $1"
    ;;
  esac
}